From e58d6462a9fed10e3752de6c6a1d212a9dc32ac8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adam=20=C5=A0trauch?= <cx@initd.cz>
Date: Sun, 6 Feb 2022 00:01:05 +0100
Subject: [PATCH] Massive handlers refactoring

Taking logic from handler into glue module
Add tests for apps
Updated docker library
---
 apps/main.go              |  13 +-
 apps/main_test.go         | 189 +++++++++++
 apps/snapshots.go         |   5 +-
 containers/types.go       |   6 +-
 glue/main.go              | 652 +++++++++++++++++++++++++++++++++++++
 stats.go => glue/stats.go |  10 +-
 glue/types.go             |  15 +
 go.mod                    |   1 +
 go.sum                    |   3 +-
 handlers.go               | 377 ++++++---------------
 handlers_nats.go          | 670 +++++++++++---------------------------
 main.go                   |  26 +-
 tools.go                  |  45 ---
 types.go                  |  16 +-
 14 files changed, 1173 insertions(+), 855 deletions(-)
 create mode 100644 apps/main_test.go
 create mode 100644 glue/main.go
 rename stats.go => glue/stats.go (94%)
 create mode 100644 glue/types.go

diff --git a/apps/main.go b/apps/main.go
index 0b52027..b0d08dc 100644
--- a/apps/main.go
+++ b/apps/main.go
@@ -7,6 +7,7 @@ import (
 )
 
 // AppsProcessor encapsulates functions for apps manipulation
+// This handles only the database part but not containers
 type AppsProcessor struct {
 	DB *gorm.DB
 }
@@ -17,19 +18,19 @@ func (a *AppsProcessor) Init() {
 }
 
 // Get returns one app
-func (a *AppsProcessor) Get(name string) (*App, error) {
+func (a *AppsProcessor) Get(name string) (App, error) {
 	var app App
 
 	err := a.DB.Preload("Labels").Where("name = ?", name).First(&app).Error
 	if err != nil {
-		return nil, err
+		return app, err
 	}
 
-	return &app, nil
+	return app, nil
 }
 
 // List returns all apps located on this node
-func (a *AppsProcessor) List() (*Apps, error) {
+func (a *AppsProcessor) List() (Apps, error) {
 	var apps Apps
 
 	err := a.DB.Preload("Labels").Find(&apps).Error
@@ -37,7 +38,7 @@ func (a *AppsProcessor) List() (*Apps, error) {
 		return nil, err
 	}
 
-	return &apps, nil
+	return apps, nil
 }
 
 // New creates new record about application in the database
@@ -180,5 +181,5 @@ func (a *AppsProcessor) RemoveLabel(appName string, label string) error {
 		return err
 	}
 
-	return a.DB.Where("label = ? AND app_id = ?", label, app.ID).Delete(&Label{}).Error
+	return a.DB.Where("value = ? AND app_id = ?", label, app.ID).Delete(&Label{}).Error
 }
diff --git a/apps/main_test.go b/apps/main_test.go
new file mode 100644
index 0000000..c93e837
--- /dev/null
+++ b/apps/main_test.go
@@ -0,0 +1,189 @@
+package apps
+
+import (
+	"log"
+	"testing"
+
+	"github.com/jinzhu/gorm"
+	"github.com/rosti-cz/node-api/detector"
+	"github.com/stretchr/testify/assert"
+
+	// This is line from GORM documentation that imports database dialect
+	_ "github.com/jinzhu/gorm/dialects/sqlite"
+)
+
+const testDBPath = "file::memory:?cache=shared"
+
+func testDB() *gorm.DB {
+	db, err := gorm.Open("sqlite3", testDBPath)
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	return db
+}
+
+func TestAppsProcessorGet(t *testing.T) {
+	processor := AppsProcessor{
+		DB: testDB(),
+	}
+	processor.Init()
+
+	err := processor.New("testapp_1234", 1000, 1001, "testimage", 2, 256)
+	assert.Nil(t, err)
+
+	app, err := processor.Get("testapp_1234")
+	assert.Nil(t, err)
+	assert.Greater(t, int(app.ID), 0)
+}
+
+func TestAppsProcessorList(t *testing.T) {
+	processor := AppsProcessor{
+		DB: testDB(),
+	}
+	processor.Init()
+
+	err := processor.New("testapp_2234", 1002, 1003, "testimage", 2, 256)
+	assert.Nil(t, err)
+
+	apps, err := processor.List()
+	assert.Nil(t, err)
+	assert.Equal(t, "testapp_1234", apps[0].Name)
+}
+
+func TestAppsProcessorNew(t *testing.T) {
+	processor := AppsProcessor{
+		DB: testDB(),
+	}
+	processor.Init()
+
+	err := processor.New("testapp_1234", 1002, 1003, "testimage", 2, 256)
+	assert.Nil(t, err)
+}
+
+func TestAppsProcessorUpdate(t *testing.T) {
+	processor := AppsProcessor{
+		DB: testDB(),
+	}
+	processor.Init()
+
+	err := processor.New("updateapp_1224", 1002, 1003, "testimage", 2, 256)
+	assert.Nil(t, err)
+
+	_, err = processor.Update("updateapp_1224", 1052, 1053, "testimage2", 4, 512)
+	assert.Nil(t, err)
+
+	app, err := processor.Get("updateapp_1224")
+	assert.Nil(t, err)
+
+	assert.Equal(t, 1052, app.SSHPort)
+	assert.Equal(t, 1053, app.HTTPPort)
+	assert.Equal(t, "testimage2", app.Image)
+	assert.Equal(t, 4, app.CPU)
+	assert.Equal(t, 512, app.Memory)
+}
+
+func TestAppsProcessorUpdateResources(t *testing.T) {
+	processor := AppsProcessor{
+		DB: testDB(),
+	}
+	processor.Init()
+
+	err := processor.New("updateresources_1224", 1002, 1003, "testimage", 2, 256)
+	assert.Nil(t, err)
+
+	err = processor.UpdateResources("updateresources_1224", "running", 1000, 256, 100, 200, detector.Flags{"test"})
+	assert.Nil(t, err)
+
+	app, err := processor.Get("updateresources_1224")
+	assert.Nil(t, err)
+
+	assert.Equal(t, "running", app.State)
+	assert.Equal(t, float64(1000), app.CPUUsage)
+	assert.Equal(t, 256, app.MemoryUsage)
+	assert.Equal(t, 100, app.DiskUsageBytes)
+	assert.Equal(t, 200, app.DiskUsageInodes)
+	assert.Contains(t, app.Flags, "test")
+}
+
+func TestAppsProcessorUpdateState(t *testing.T) {
+	processor := AppsProcessor{
+		DB: testDB(),
+	}
+	processor.Init()
+
+	err := processor.New("update_1224", 1002, 1003, "testimage", 2, 256)
+	assert.Nil(t, err)
+
+	err = processor.UpdateState("update_1224", "no-container")
+	assert.Nil(t, err)
+
+	app, err := processor.Get("update_1224")
+	assert.Nil(t, err)
+
+	assert.Equal(t, "no-container", app.State)
+}
+
+func TestAppsProcessorAddLabel(t *testing.T) {
+	processor := AppsProcessor{
+		DB: testDB(),
+	}
+	processor.Init()
+
+	err := processor.New("label_1224", 1002, 1003, "testimage", 2, 256)
+	assert.Nil(t, err)
+
+	err = processor.AddLabel("label_1224", "testlabel")
+	assert.Nil(t, err)
+
+	app, err := processor.Get("label_1224")
+	assert.Nil(t, err)
+
+	assert.Equal(t, "testlabel", app.Labels[0].Value)
+}
+
+func TestAppsProcessorRemoveLabel(t *testing.T) {
+	processor := AppsProcessor{
+		DB: testDB(),
+	}
+	processor.Init()
+
+	err := processor.New("label_1223", 1002, 1003, "testimage", 2, 256)
+	assert.Nil(t, err)
+
+	err = processor.AddLabel("label_1223", "testlabel")
+	assert.Nil(t, err)
+
+	app, err := processor.Get("label_1223")
+	assert.Nil(t, err)
+
+	assert.Equal(t, "testlabel", app.Labels[0].Value)
+
+	err = processor.RemoveLabel("label_1223", "testlabel")
+	assert.Nil(t, err)
+
+	app, err = processor.Get("label_1223")
+	assert.Nil(t, err)
+
+	assert.Equal(t, 0, len(app.Labels))
+}
+
+func TestAppsProcessorDelete(t *testing.T) {
+	processor := AppsProcessor{
+		DB: testDB(),
+	}
+	processor.Init()
+
+	err := processor.New("testapp_5234", 1002, 1003, "testimage", 2, 256)
+	assert.Nil(t, err)
+
+	app, err := processor.Get("testapp_5234")
+	assert.Nil(t, err)
+	assert.Equal(t, 256, app.Memory)
+
+	err = processor.Delete("testapp_5234")
+	assert.Nil(t, err)
+
+	_, err = processor.Get("testapp_5234")
+	assert.Error(t, err, "record not found")
+}
diff --git a/apps/snapshots.go b/apps/snapshots.go
index 2b17087..60ba8ba 100644
--- a/apps/snapshots.go
+++ b/apps/snapshots.go
@@ -305,7 +305,10 @@ func (s *SnapshotProcessor) ListAppsSnapshotsByLabel(labelValue string) ([]Snaps
 		}
 
 		snapshot, err := s.metadataForSnapshotKey(key)
-		if err != nil {
+		if err != nil && strings.Contains(err.Error(), "wrong snapshot key format") {
+			log.Printf("WARNING: Snapshot storage: invalid key found (%s)", key)
+			continue
+		} else if err != nil {
 			return snapshots, err
 		}
 
diff --git a/containers/types.go b/containers/types.go
index 5417196..3ec3d52 100644
--- a/containers/types.go
+++ b/containers/types.go
@@ -276,14 +276,14 @@ func (c *Container) SetTechnology(tech string, version string) error {
 }
 
 // GetProcessList returns list of processes managed by supervisor.
-func (c *Container) GetProcessList() (*[]Process, error) {
+func (c *Container) GetProcessList() ([]Process, error) {
 	driver := c.getDriver()
 
 	processes := []Process{}
 
 	stdouterr, err := driver.Exec(c.App.Name, []string{"supervisorctl", "status"}, "", []string{}, true)
 	if err != nil {
-		return &processes, nil
+		return processes, nil
 	}
 
 	trimmed := strings.TrimSpace(string(*stdouterr))
@@ -297,7 +297,7 @@ func (c *Container) GetProcessList() (*[]Process, error) {
 		}
 	}
 
-	return &processes, nil
+	return processes, nil
 }
 
 // GetSystemProcesses return list of running system processes
diff --git a/glue/main.go b/glue/main.go
new file mode 100644
index 0000000..4c6e5d4
--- /dev/null
+++ b/glue/main.go
@@ -0,0 +1,652 @@
+package glue
+
+import (
+	"errors"
+	"fmt"
+	"log"
+	"time"
+
+	"github.com/jinzhu/gorm"
+	"github.com/rosti-cz/node-api/apps"
+	"github.com/rosti-cz/node-api/containers"
+	docker "github.com/rosti-cz/node-api/containers"
+	"github.com/rosti-cz/node-api/detector"
+	"github.com/rosti-cz/node-api/node"
+)
+
+// Processor separates logic of apps, containers, detector and node from handlers.
+// It defines common interface for both types of handlers, HTTP and the events.
+type Processor struct {
+	AppName           string
+	DB                *gorm.DB
+	SnapshotProcessor *apps.SnapshotProcessor
+	WaitForAppLoops   uint // each loop is five seconds
+}
+
+// Return prepared Container instance
+func (p *Processor) getContainer() (containers.Container, error) {
+	container := containers.Container{}
+
+	processor := apps.AppsProcessor{
+		DB: p.DB,
+	}
+	app, err := processor.Get(p.AppName)
+	if err != nil {
+		return container, err
+	}
+
+	container = docker.Container{
+		App: &app,
+	}
+
+	return container, nil
+}
+
+// returns instance of getAppProcessor
+func (p *Processor) getAppProcessor() apps.AppsProcessor {
+	return apps.AppsProcessor{
+		DB: p.DB,
+	}
+}
+
+// waits until app is ready
+func (p *Processor) waitForApp() error {
+	sleepFor := 5 * time.Second
+	loops := 6
+	if p.WaitForAppLoops != 0 {
+		loops = int(p.WaitForAppLoops)
+	}
+
+	for i := 0; i < loops; i++ {
+		err := updateState(p.AppName)
+		if err != nil {
+			time.Sleep(sleepFor)
+			continue
+		}
+
+		container, err := p.getContainer()
+		if err != nil {
+			return err
+		}
+
+		status, err := container.Status()
+		if err != nil {
+			return err
+		}
+		if status == "running" {
+			return nil
+		}
+
+		time.Sleep(sleepFor)
+	}
+
+	return errors.New("timeout reached")
+}
+
+// List returns list of apps
+func (p *Processor) List() (apps.Apps, error) {
+	appList := apps.Apps{}
+
+	err := gatherStates()
+	if err != nil {
+		return appList, fmt.Errorf("backend error: %v", err)
+	}
+
+	processor := apps.AppsProcessor{
+		DB: p.DB,
+	}
+	appList, err = processor.List()
+
+	if err != nil {
+		return appList, fmt.Errorf("backend error: %v", err)
+	}
+
+	return appList, err
+}
+
+// Get returns one app
+func (p *Processor) Get() (apps.App, error) {
+	app := apps.App{}
+
+	err := updateState(p.AppName)
+	if err != nil {
+		return app, err
+	}
+
+	processor := apps.AppsProcessor{
+		DB: p.DB,
+	}
+	app, err = processor.Get(p.AppName)
+	if err != nil {
+		return app, err
+	}
+
+	// Gather runtime info about the container
+	container := docker.Container{
+		App: &app,
+	}
+
+	status, err := container.Status()
+	if err != nil {
+		return app, err
+	}
+	if status == "running" {
+		var err error
+		app.Techs, err = container.GetTechs()
+		if err != nil {
+			return app, err
+		}
+		app.PrimaryTech, err = container.GetPrimaryTech()
+		if err != nil {
+			return app, err
+		}
+
+		processList, err := container.GetSystemProcesses()
+		if err != nil {
+			return app, err
+		}
+
+		flags, err := detector.Check(processList)
+		if err != nil {
+			return app, err
+		}
+		app.Flags = flags.String()
+	}
+
+	return app, nil
+}
+
+// Create creates a single app in the system
+func (p *Processor) Create(appTemplate apps.App) error {
+	err := p.Register(appTemplate)
+	if err != nil {
+		return err
+	}
+
+	container := docker.Container{
+		App: &appTemplate,
+	}
+
+	err = container.Create()
+	if err != nil {
+		return err
+	}
+
+	// Restore from snapshot if it's noted in the request
+	if len(appTemplate.Snapshot) > 0 {
+		log.Printf("App %s is going to be created from %s snapshot\n", appTemplate.Name, appTemplate.Snapshot)
+
+		// Restore the data
+		err = p.SnapshotProcessor.RestoreSnapshot(appTemplate.Snapshot, appTemplate.Name)
+		if err != nil {
+			return err
+		}
+	}
+
+	err = container.Start()
+	return err
+}
+
+// Register registers app without creating a container for it
+// Returns app name and an error
+func (p *Processor) Register(appTemplate apps.App) error {
+	processor := apps.AppsProcessor{
+		DB: p.DB,
+	}
+	err := processor.New(appTemplate.Name, appTemplate.SSHPort, appTemplate.HTTPPort, appTemplate.Image, appTemplate.CPU, appTemplate.Memory)
+	if err != nil {
+		if validationError, ok := err.(apps.ValidationError); ok {
+			return fmt.Errorf("validation error: %v", validationError.Error())
+		}
+		return err
+	}
+
+	return nil
+}
+
+// Update updates application
+func (p *Processor) Update(appTemplate apps.App) error {
+	processor := apps.AppsProcessor{
+		DB: p.DB,
+	}
+	app, err := processor.Update(appTemplate.Name, appTemplate.SSHPort, appTemplate.HTTPPort, appTemplate.Image, appTemplate.CPU, appTemplate.Memory)
+	if err != nil {
+		if validationError, ok := err.(apps.ValidationError); ok {
+			return fmt.Errorf("validation error: %v", validationError.Error())
+		}
+		return err
+	}
+
+	container := docker.Container{
+		App: app,
+	}
+
+	err = container.Destroy()
+	if err != nil && err.Error() == "no container found" {
+		// We don't care if the container didn't exist anyway
+		err = nil
+	}
+	if err != nil {
+		return err
+	}
+
+	err = container.Create()
+	if err != nil {
+		return err
+	}
+
+	err = container.Start()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// Delete removes app from the system
+func (p *Processor) Delete() error {
+	processor := apps.AppsProcessor{
+		DB: p.DB,
+	}
+	app, err := processor.Get(p.AppName)
+	if err != nil {
+		log.Println("ERROR: delete app:", err.Error())
+	}
+
+	container := docker.Container{
+		App: &app,
+	}
+
+	status, err := container.Status()
+	if err != nil {
+		return err
+	}
+
+	if status != "no-container" {
+		// We stop the container first
+		err = container.Stop()
+		if err != nil {
+			return err
+		}
+
+		// Then delete it
+		err = container.Delete()
+		if err != nil {
+			return err
+		}
+	}
+
+	err = processor.Delete(app.Name)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// Stop stops app
+func (p *Processor) Stop() error {
+	processor := apps.AppsProcessor{
+		DB: p.DB,
+	}
+	app, err := processor.Get(p.AppName)
+	if err != nil {
+		return err
+	}
+
+	container := docker.Container{
+		App: &app,
+	}
+
+	status, err := container.Status()
+	if err != nil {
+		return err
+	}
+
+	// Stop the container only when it exists
+	if status != "no-container" {
+		err = container.Stop()
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// Start starts app
+func (p *Processor) Start() error {
+	processor := apps.AppsProcessor{
+		DB: p.DB,
+	}
+	app, err := processor.Get(p.AppName)
+	if err != nil {
+		return err
+	}
+
+	container := docker.Container{
+		App: &app,
+	}
+
+	status, err := container.Status()
+	if err != nil {
+		return err
+	}
+	if status == "no-container" {
+		err = container.Create()
+		if err != nil {
+			return err
+		}
+	}
+
+	err = container.Start()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// Restart restarts app
+func (p *Processor) Restart() error {
+	processor := apps.AppsProcessor{
+		DB: p.DB,
+	}
+	app, err := processor.Get(p.AppName)
+	if err != nil {
+		return err
+	}
+
+	container := docker.Container{
+		App: &app,
+	}
+
+	err = container.Restart()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// UpdateKeys uploads SSH keys into the container
+// keys parameters is just a string, one key per line
+func (p *Processor) UpdateKeys(keys string) error {
+	err := p.waitForApp()
+	if err != nil {
+		return err
+	}
+
+	container, err := p.getContainer()
+	if err != nil {
+		return err
+	}
+
+	err = container.SetFileContent(sshPubKeysLocation, keys+"\n", "0600")
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// SetPassword sets up a new password to access the SSH user
+func (p *Processor) SetPassword(password string) error {
+	err := p.waitForApp()
+	if err != nil {
+		return err
+	}
+
+	container, err := p.getContainer()
+	if err != nil {
+		return err
+	}
+
+	err = container.SetPassword(password)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// Processes returns list of supervisord processes
+func (p *Processor) Processes() ([]docker.Process, error) {
+	container, err := p.getContainer()
+	if err != nil {
+		return nil, err
+	}
+
+	processes, err := container.GetProcessList()
+	if err != nil {
+		return nil, err
+	}
+
+	return processes, nil
+}
+
+// EnableTech sets up runtime for new tech or new version a tech
+func (p *Processor) EnableTech(service, version string) error {
+	err := p.waitForApp()
+	if err != nil {
+		return err
+	}
+
+	container, err := p.getContainer()
+	if err != nil {
+		return err
+	}
+
+	err = container.SetTechnology(service, version)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// Rebuild recreates container for app
+func (p *Processor) Rebuild() error {
+	container, err := p.getContainer()
+	if err != nil {
+		return err
+	}
+
+	err = container.Destroy()
+	if err != nil {
+		return err
+	}
+
+	err = container.Create()
+	if err != nil {
+		return err
+	}
+
+	err = container.Start()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// AddLabel adds a label to the app
+func (p *Processor) AddLabel(label string) error {
+	appProcessor := p.getAppProcessor()
+	err := appProcessor.AddLabel(p.AppName, label)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// RemoveLabel removes a label from the app
+func (p *Processor) RemoveLabel(label string) error {
+	appProcessor := p.getAppProcessor()
+	err := appProcessor.RemoveLabel(p.AppName, label)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// GetNote returns node's info
+func (p *Processor) GetNode() (*node.Node, error) {
+	node, err := node.GetNodeInfo()
+	if err != nil {
+		return nil, err
+	}
+
+	return node, nil
+}
+
+// CreateSnapshot creates a snapshot of given app
+func (p *Processor) CreateSnapshot(labels []string) error {
+	_, err := p.SnapshotProcessor.CreateSnapshot(p.AppName, labels)
+	return err
+}
+
+// RestoreFromSnapshot restores app from given snapshot
+func (p *Processor) RestoreFromSnapshot(snapshotName string) error {
+	container, err := p.getContainer()
+
+	// Stop the container
+	status, err := container.Status()
+	if err != nil {
+		return err
+	}
+
+	// Stop the container only when it exists
+	if status != "no-container" {
+		err = container.Stop()
+		if err != nil {
+			return err
+		}
+	}
+
+	// Restore the data
+	err = p.SnapshotProcessor.RestoreSnapshot(snapshotName, p.AppName)
+	if err != nil {
+		return err
+	}
+
+	// Start the container
+	status, err = container.Status()
+	if err != nil {
+		return err
+	}
+	if status == "no-container" {
+		err = container.Create()
+		if err != nil {
+			return err
+		}
+	}
+
+	err = container.Start()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// ListSnapshots returns list of snapshots
+func (p *Processor) ListSnapshots() (SnapshotsMetadata, error) {
+	snapshots, err := p.SnapshotProcessor.ListAppSnapshots(p.AppName)
+	if err != nil {
+		return SnapshotsMetadata{}, err
+	}
+
+	var output SnapshotsMetadata
+	for _, snapshot := range snapshots {
+		output = append(output, SnapshotMetadata{
+			Key:      snapshot.KeyName(p.SnapshotProcessor.IndexLabel),
+			Metadata: snapshot,
+		})
+	}
+
+	return output, nil
+}
+
+// ListAppsSnapshots returns list of snapshots for given app list
+func (p *Processor) ListAppsSnapshots(appNames []string) (SnapshotsMetadata, error) {
+	snapshots, err := p.SnapshotProcessor.ListAppsSnapshots(appNames)
+	if err != nil {
+		return SnapshotsMetadata{}, err
+	}
+
+	var output SnapshotsMetadata
+	for _, snapshot := range snapshots {
+		output = append(output, SnapshotMetadata{
+			Key:      snapshot.KeyName(p.SnapshotProcessor.IndexLabel),
+			Metadata: snapshot,
+		})
+	}
+
+	return output, nil
+}
+
+// ListSnapshotsByLabel returns list of snapshots by given label
+func (p *Processor) ListSnapshotsByLabel(label string) (SnapshotsMetadata, error) {
+	snapshots, err := p.SnapshotProcessor.ListAppsSnapshotsByLabel(label)
+	if err != nil {
+		return SnapshotsMetadata{}, err
+	}
+
+	var output SnapshotsMetadata
+	for _, snapshot := range snapshots {
+		output = append(output, SnapshotMetadata{
+			Key:      snapshot.KeyName(p.SnapshotProcessor.IndexLabel),
+			Metadata: snapshot,
+		})
+	}
+
+	return output, nil
+}
+
+// GetSnapshot returns info about a single snapshot
+func (p *Processor) GetSnapshot(snapshotName string) (SnapshotMetadata, error) {
+	snapshot, err := p.SnapshotProcessor.GetSnapshot(snapshotName)
+	if err != nil {
+		return SnapshotMetadata{}, err
+	}
+	output := SnapshotMetadata{
+		Key:      snapshot.KeyName(p.SnapshotProcessor.IndexLabel),
+		Metadata: snapshot,
+	}
+
+	return output, nil
+
+}
+
+// GetSnapshotDownloadLink return download link for a snapshot
+func (p *Processor) GetSnapshotDownloadLink(snapshotName string) (string, error) {
+	link, err := p.SnapshotProcessor.GetDownloadLink(snapshotName)
+	if err != nil {
+		return "", err
+	}
+
+	return link, nil
+}
+
+// DeleteSnapshot deletes a snapshot
+func (p *Processor) DeleteSnapshot(snapshotName string) error {
+	err := p.SnapshotProcessor.DeleteSnapshot(snapshotName)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// DeleteAppSnapshots deletes all snapshot of given app
+func (p *Processor) DeleteAppSnapshots() error {
+	err := p.SnapshotProcessor.DeleteAppSnapshots(p.AppName)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
diff --git a/stats.go b/glue/stats.go
similarity index 94%
rename from stats.go
rename to glue/stats.go
index 19e18e3..7bd1e16 100644
--- a/stats.go
+++ b/glue/stats.go
@@ -1,4 +1,4 @@
-package main
+package glue
 
 import (
 	"log"
@@ -20,7 +20,7 @@ func updateUsage(name string) error {
 	}
 
 	container := docker.Container{
-		App: app,
+		App: &app,
 	}
 
 	state, err := container.GetState()
@@ -52,7 +52,7 @@ func updateState(name string) error {
 	}
 
 	container := docker.Container{
-		App: app,
+		App: &app,
 	}
 	state, err := container.Status()
 	if err != nil {
@@ -76,7 +76,7 @@ func gatherStats() error {
 		return err
 	}
 
-	for _, app := range *appList {
+	for _, app := range appList {
 		err := updateUsage(app.Name)
 		if err != nil {
 			log.Println("STATS ERROR:", err.Error())
@@ -96,7 +96,7 @@ func gatherStates() error {
 		return err
 	}
 
-	for _, app := range *appList {
+	for _, app := range appList {
 		err := updateState(app.Name)
 		if err != nil {
 			log.Println("STATE ERROR:", err.Error())
diff --git a/glue/types.go b/glue/types.go
new file mode 100644
index 0000000..98e16c1
--- /dev/null
+++ b/glue/types.go
@@ -0,0 +1,15 @@
+package glue
+
+import "github.com/rosti-cz/node-api/apps"
+
+// Path where authorized keys are
+const sshPubKeysLocation = "/srv/.ssh/authorized_keys"
+
+// SnapshotMetadata is snapshot structure encapsulation that combines key and metadata about the snapshot
+type SnapshotMetadata struct {
+	Key      string        `json:"key"`
+	Metadata apps.Snapshot `json:"metadata"`
+}
+
+// SnapshotsMetadata is returned by handlers
+type SnapshotsMetadata []SnapshotMetadata
diff --git a/go.mod b/go.mod
index 1450473..3199f23 100644
--- a/go.mod
+++ b/go.mod
@@ -13,6 +13,7 @@ require (
 	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/gorilla/mux v1.8.0 // indirect
 	github.com/jinzhu/gorm v1.9.14
+	github.com/jinzhu/now v1.1.4 // indirect
 	github.com/kelseyhightower/envconfig v1.4.0
 	github.com/labstack/echo v3.3.10+incompatible
 	github.com/labstack/gommon v0.3.0 // indirect
diff --git a/go.sum b/go.sum
index a82ef4e..5e77d94 100644
--- a/go.sum
+++ b/go.sum
@@ -422,8 +422,9 @@ github.com/jinzhu/gorm v1.9.14 h1:Kg3ShyTPcM6nzVo148fRrcMO6MNKuqtOUwnzqMgVniM=
 github.com/jinzhu/gorm v1.9.14/go.mod h1:G3LB3wezTOWM2ITLzPxEXgSkOXAntiLHS7UdBefADcs=
 github.com/jinzhu/inflection v1.0.0 h1:K317FqzuhWc8YvSVlFMCCUb36O/S9MCKRDI7QkRKD/E=
 github.com/jinzhu/inflection v1.0.0/go.mod h1:h+uFLlag+Qp1Va5pdKtLDYj+kHp5pxUVkryuEj+Srlc=
-github.com/jinzhu/now v1.0.1 h1:HjfetcXq097iXP0uoPCdnM4Efp5/9MsM0/M+XOTeR3M=
 github.com/jinzhu/now v1.0.1/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
+github.com/jinzhu/now v1.1.4 h1:tHnRBy1i5F2Dh8BAFxqFzxKqqvezXrL2OW1TnX+Mlas=
+github.com/jinzhu/now v1.1.4/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
 github.com/jmespath/go-jmespath v0.0.0-20160202185014-0b12d6b521d8/go.mod h1:Nht3zPeWKUH0NzdCt2Blrr5ys8VGpn0CEB0cQHVjt7k=
 github.com/jmespath/go-jmespath v0.0.0-20160803190731-bd40a432e4c7/go.mod h1:Nht3zPeWKUH0NzdCt2Blrr5ys8VGpn0CEB0cQHVjt7k=
 github.com/joho/godotenv v1.3.0 h1:Zjp+RcGpHhGlrMbJzXTrZZPrWj+1vfm90La1wgB6Bhc=
diff --git a/handlers.go b/handlers.go
index ad3a7dd..a847a79 100644
--- a/handlers.go
+++ b/handlers.go
@@ -6,12 +6,12 @@ import (
 	"log"
 	"net/http"
 	"os"
+	"strings"
 
 	"github.com/labstack/echo"
 	"github.com/rosti-cz/node-api/apps"
 	"github.com/rosti-cz/node-api/common"
-	docker "github.com/rosti-cz/node-api/containers"
-	"github.com/rosti-cz/node-api/node"
+	"github.com/rosti-cz/node-api/glue"
 )
 
 func homeHandler(c echo.Context) error {
@@ -21,16 +21,11 @@ func homeHandler(c echo.Context) error {
 }
 
 func listAppsHandler(c echo.Context) error {
-	err := gatherStates()
-	if err != nil {
-		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-	}
-
-	processor := apps.AppsProcessor{
+	processor := glue.Processor{
 		DB: common.GetDBConnection(),
 	}
-	applications, err := processor.List()
 
+	applications, err := processor.List()
 	if err != nil {
 		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 	}
@@ -42,15 +37,11 @@ func listAppsHandler(c echo.Context) error {
 func getAppHandler(c echo.Context) error {
 	name := c.Param("name")
 
-	err := updateState(name)
-	if err != nil {
-		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
+	processor := glue.Processor{
+		AppName: name,
+		DB:      common.GetDBConnection(),
 	}
-
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
-	}
-	app, err := processor.Get(name)
+	app, err := processor.Get()
 	if err != nil {
 		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 	}
@@ -63,35 +54,29 @@ func getAppHandler(c echo.Context) error {
 func createAppHandler(c echo.Context) error {
 	registerOnly := c.QueryParam("register_only") == "1"
 
-	app := apps.App{}
-	err := c.Bind(&app)
+	appTemplate := apps.App{}
+	err := c.Bind(&appTemplate)
 	if err != nil {
 		return c.JSONPretty(http.StatusBadRequest, Message{Message: err.Error()}, JSONIndent)
 	}
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
-	}
-	err = processor.New(app.Name, app.SSHPort, app.HTTPPort, app.Image, app.CPU, app.Memory)
-	if err != nil {
-		if validationError, ok := err.(apps.ValidationError); ok {
-			return c.JSONPretty(http.StatusBadRequest, Message{Errors: validationError.Errors}, JSONIndent)
-		}
-		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
+	processor := glue.Processor{
+		AppName: appTemplate.Name,
+		DB:      common.GetDBConnection(),
 	}
 
-	if !registerOnly {
-		container := docker.Container{
-			App: &app,
-		}
-
-		err = container.Create()
-		if err != nil {
+	if registerOnly {
+		err = processor.Register(appTemplate)
+		if err != nil && strings.Contains(err.Error(), "validation error") {
+			return c.JSONPretty(http.StatusBadRequest, Message{Errors: []string{err.Error()}}, JSONIndent)
+		} else if err != nil {
 			return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 		}
-
-		err = container.Start()
-		if err != nil {
+	} else {
+		err = processor.Create(appTemplate)
+		if err != nil && strings.Contains(err.Error(), "validation error") {
+			return c.JSONPretty(http.StatusBadRequest, Message{Errors: []string{err.Error()}}, JSONIndent)
+		} else if err != nil {
 			return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 		}
 	}
@@ -103,45 +88,20 @@ func createAppHandler(c echo.Context) error {
 func updateAppHandler(c echo.Context) error {
 	name := c.Param("name")
 
-	app := apps.App{}
-	err := c.Bind(&app)
+	appTemplate := apps.App{}
+	err := c.Bind(&appTemplate)
 	if err != nil {
 		return c.JSONPretty(http.StatusBadRequest, Message{Message: err.Error()}, JSONIndent)
 	}
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName: name,
+		DB:      common.GetDBConnection(),
 	}
-	appPointer, err := processor.Update(name, app.SSHPort, app.HTTPPort, app.Image, app.CPU, app.Memory)
-	if err != nil {
-		if validationError, ok := err.(apps.ValidationError); ok {
-			return c.JSONPretty(http.StatusBadRequest, Message{Errors: validationError.Errors}, JSONIndent)
-		}
-		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-	}
-
-	app = *appPointer
-
-	container := docker.Container{
-		App: &app,
-	}
-
-	err = container.Destroy()
-	if err != nil && err.Error() == "no container found" {
-		// We don't care if the container didn't exist anyway
-		err = nil
-	}
-	if err != nil {
-		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-	}
-
-	err = container.Create()
-	if err != nil {
-		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-	}
-
-	err = container.Start()
-	if err != nil {
+	err = processor.Update(appTemplate)
+	if err != nil && strings.Contains(err.Error(), "validation error") {
+		return c.JSONPretty(http.StatusBadRequest, Message{Errors: []string{err.Error()}}, JSONIndent)
+	} else if err != nil {
 		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 	}
 
@@ -152,31 +112,15 @@ func updateAppHandler(c echo.Context) error {
 func stopAppHandler(c echo.Context) error {
 	name := c.Param("name")
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName: name,
+		DB:      common.GetDBConnection(),
 	}
-	app, err := processor.Get(name)
+	err := processor.Stop()
 	if err != nil {
 		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 	}
 
-	container := docker.Container{
-		App: app,
-	}
-
-	status, err := container.Status()
-	if err != nil {
-		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-	}
-
-	// Stop the container only when it exists
-	if status != "no-container" {
-		err = container.Stop()
-		if err != nil {
-			return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-		}
-	}
-
 	return c.JSON(http.StatusOK, Message{Message: "ok"})
 }
 
@@ -184,30 +128,11 @@ func stopAppHandler(c echo.Context) error {
 func startAppHandler(c echo.Context) error {
 	name := c.Param("name")
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName: name,
+		DB:      common.GetDBConnection(),
 	}
-	app, err := processor.Get(name)
-	if err != nil {
-		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-	}
-
-	container := docker.Container{
-		App: app,
-	}
-
-	status, err := container.Status()
-	if err != nil {
-		return err
-	}
-	if status == "no-container" {
-		err = container.Create()
-		if err != nil {
-			return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-		}
-	}
-
-	err = container.Start()
+	err := processor.Start()
 	if err != nil {
 		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 	}
@@ -219,19 +144,11 @@ func startAppHandler(c echo.Context) error {
 func restartAppHandler(c echo.Context) error {
 	name := c.Param("name")
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName: name,
+		DB:      common.GetDBConnection(),
 	}
-	app, err := processor.Get(name)
-	if err != nil {
-		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-	}
-
-	container := docker.Container{
-		App: app,
-	}
-
-	err = container.Restart()
+	err := processor.Restart()
 	if err != nil {
 		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 	}
@@ -249,19 +166,11 @@ func setPasswordHandler(c echo.Context) error {
 		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 	}
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName: name,
+		DB:      common.GetDBConnection(),
 	}
-	app, err := processor.Get(name)
-	if err != nil {
-		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-	}
-
-	container := docker.Container{
-		App: app,
-	}
-
-	err = container.SetPassword(password.Password)
+	err = processor.SetPassword(password.Password)
 	if err != nil {
 		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 	}
@@ -278,19 +187,11 @@ func setKeysHandler(c echo.Context) error {
 		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 	}
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName: name,
+		DB:      common.GetDBConnection(),
 	}
-	app, err := processor.Get(name)
-	if err != nil {
-		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-	}
-
-	container := docker.Container{
-		App: app,
-	}
-
-	err = container.SetFileContent(sshPubKeysLocation, string(body)+"\n", "0600")
+	err = processor.UpdateKeys(string(body) + "\n")
 	if err != nil {
 		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 	}
@@ -301,73 +202,22 @@ func setKeysHandler(c echo.Context) error {
 func setServicesHandler(c echo.Context) error {
 	name := c.Param("name")
 
-	quickServices := &QuickServices{}
-	err := c.Bind(quickServices)
+	tech := &Technology{}
+	err := c.Bind(tech)
 	if err != nil {
 		return c.JSONPretty(http.StatusBadRequest, Message{Message: err.Error()}, JSONIndent)
 	}
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName: name,
+		DB:      common.GetDBConnection(),
 	}
-	app, err := processor.Get(name)
+
+	err = processor.EnableTech(tech.Name, tech.Version)
 	if err != nil {
 		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 	}
 
-	container := docker.Container{
-		App: app,
-	}
-
-	if quickServices.Python {
-		err = container.SetTechnology("python", "")
-		if err != nil {
-			return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-		}
-	}
-
-	if quickServices.PHP {
-		err = container.SetTechnology("php", "")
-		if err != nil {
-			return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-		}
-	}
-
-	if quickServices.Node {
-		err = container.SetTechnology("node", "")
-		if err != nil {
-			return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-		}
-	}
-
-	if quickServices.Ruby {
-		err = container.SetTechnology("ruby", "")
-		if err != nil {
-			return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-		}
-	}
-
-	if quickServices.Deno {
-		err = container.SetTechnology("deno", "")
-		if err != nil {
-			return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-		}
-	}
-
-	if quickServices.Memcached {
-		err = container.SetTechnology("memcached", "")
-		if err != nil {
-			return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-		}
-	}
-
-	if quickServices.Redis {
-		err = container.SetTechnology("redis", "")
-		if err != nil {
-			return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-		}
-	}
-
 	return c.JSON(http.StatusOK, Message{Message: "ok"})
 }
 
@@ -375,33 +225,11 @@ func setServicesHandler(c echo.Context) error {
 func rebuildAppHandler(c echo.Context) error {
 	name := c.Param("name")
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName: name,
+		DB:      common.GetDBConnection(),
 	}
-	app, err := processor.Get(name)
-	if err != nil {
-		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-	}
-
-	container := docker.Container{
-		App: app,
-	}
-
-	err = container.Destroy()
-	if err != nil && err.Error() == "no container found" {
-		// We don't care if the container didn't exist anyway
-		err = nil
-	}
-	if err != nil {
-		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-	}
-
-	err = container.Create()
-	if err != nil {
-		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-	}
-
-	err = container.Start()
+	err := processor.Rebuild()
 	if err != nil {
 		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 	}
@@ -419,10 +247,11 @@ func addLabelHandler(c echo.Context) error {
 		return c.JSONPretty(http.StatusBadRequest, Message{Message: err.Error()}, JSONIndent)
 	}
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName: name,
+		DB:      common.GetDBConnection(),
 	}
-	err = processor.AddLabel(name, label.Value)
+	err = processor.AddLabel(label.Value)
 	if err != nil {
 		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 	}
@@ -440,10 +269,11 @@ func deleteLabelHandler(c echo.Context) error {
 		return c.JSONPretty(http.StatusBadRequest, Message{Message: err.Error()}, JSONIndent)
 	}
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName: name,
+		DB:      common.GetDBConnection(),
 	}
-	err = processor.RemoveLabel(name, label.Value)
+	err = processor.RemoveLabel(label.Value)
 	if err != nil {
 		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 	}
@@ -456,36 +286,16 @@ func deleteLabelHandler(c echo.Context) error {
 func deleteAppHandler(c echo.Context) error {
 	name := c.Param("name")
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
-	}
-	app, err := processor.Get(name)
-	if err != nil {
-		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-	}
-
-	go func(app *apps.App) {
-		container := docker.Container{
-			App: app,
+	go func(name string) {
+		processor := glue.Processor{
+			AppName: name,
+			DB:      common.GetDBConnection(),
 		}
-
-		status, err := container.Status()
+		err := processor.Delete()
 		if err != nil {
-			log.Println("ERROR delete application problem: " + err.Error())
-
+			log.Printf("Deletion of application failed: %v", err)
 		}
-		if status != "no-container" {
-			err = container.Delete()
-			if err != nil {
-				log.Println("ERROR delete application problem: " + err.Error())
-			}
-		}
-
-		err = processor.Delete(app.Name)
-		if err != nil {
-			log.Println("ERROR delete application problem: " + err.Error())
-		}
-	}(app)
+	}(name)
 
 	return c.JSON(http.StatusOK, Message{Message: "deleted"})
 }
@@ -497,7 +307,10 @@ func getOrphansHander(c echo.Context) error {
 
 // Return info about the node including performance index
 func getNodeInfoHandler(c echo.Context) error {
-	node, err := node.GetNodeInfo()
+	processor := glue.Processor{
+		DB: common.GetDBConnection(),
+	}
+	node, err := processor.GetNode()
 	if err != nil {
 		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 	}
@@ -509,19 +322,11 @@ func getNodeInfoHandler(c echo.Context) error {
 func getAppProcessesHandler(c echo.Context) error {
 	name := c.Param("name")
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName: name,
+		DB:      common.GetDBConnection(),
 	}
-	app, err := processor.Get(name)
-	if err != nil {
-		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
-	}
-
-	container := docker.Container{
-		App: app,
-	}
-
-	processes, err := container.GetProcessList()
+	processes, err := processor.Processes()
 	if err != nil {
 		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 	}
@@ -534,7 +339,10 @@ func metricsHandler(c echo.Context) error {
 	var metrics string
 
 	// Node indexes
-	node, err := node.GetNodeInfo()
+	processor := glue.Processor{
+		DB: common.GetDBConnection(),
+	}
+	node, err := processor.GetNode()
 	if err != nil {
 		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 	}
@@ -552,15 +360,12 @@ func metricsHandler(c echo.Context) error {
 	metrics += fmt.Sprintf("rosti_node_memory_index{hostname=\"%s\"} %f\n", hostname, node.MemoryIndex)
 	metrics += fmt.Sprintf("rosti_node_sold_memory{hostname=\"%s\"} %d\n", hostname, node.SoldMemory)
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
-	}
 	apps, err := processor.List()
 	if err != nil {
 		return c.JSONPretty(http.StatusInternalServerError, Message{Message: err.Error()}, JSONIndent)
 	}
 
-	for _, app := range *apps {
+	for _, app := range apps {
 		metrics += fmt.Sprintf("rosti_node_app_disk_usage_bytes{hostname=\"%s\", app=\"%s\"} %d\n", hostname, app.Name, app.DiskUsageBytes)
 		metrics += fmt.Sprintf("rosti_node_app_disk_usage_inodes{hostname=\"%s\", app=\"%s\"} %d\n", hostname, app.Name, app.DiskUsageInodes)
 	}
diff --git a/handlers_nats.go b/handlers_nats.go
index eedacde..b02e73f 100644
--- a/handlers_nats.go
+++ b/handlers_nats.go
@@ -22,9 +22,7 @@ import (
 	"github.com/pkg/errors"
 	"github.com/rosti-cz/node-api/apps"
 	"github.com/rosti-cz/node-api/common"
-	docker "github.com/rosti-cz/node-api/containers"
-	"github.com/rosti-cz/node-api/detector"
-	"github.com/rosti-cz/node-api/node"
+	"github.com/rosti-cz/node-api/glue"
 )
 
 // This handler only passes messages to another function for easier testing
@@ -59,7 +57,7 @@ func _messageHandler(m *nats.Msg) error {
 		"add_label":                  addLabelEventHandler,
 		"remove_label":               removeLabelEventHandler,
 		"list_orphans":               listOrphansEventHandler,
-		"node":                       getNoteEventHandler,
+		"node":                       getNodeEventHandler,
 		"create_snapshot":            createSnapshotEventHandler,
 		"restore_from_snapshot":      restoreFromSnapshotEventHandler,
 		"list_snapshots":             listSnapshotsEventHandler,
@@ -94,17 +92,12 @@ func _messageHandler(m *nats.Msg) error {
 func listEventHandler(m *nats.Msg, message *RequestMessage) error {
 	log.Println("> List")
 
-	err := gatherStates()
-	if err != nil {
-		return errorReplyFormater(m, "backend error", err)
+	processor := glue.Processor{
+		AppName: message.AppName,
+		DB:      common.GetDBConnection(),
 	}
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
-	}
-	processor.Init()
 	applications, err := processor.List()
-
 	if err != nil {
 		return errorReplyFormater(m, "backend error", err)
 	}
@@ -128,56 +121,15 @@ func listEventHandler(m *nats.Msg, message *RequestMessage) error {
 
 // Returns one app
 func getEventHandler(m *nats.Msg, message *RequestMessage) error {
-
-	err := updateState(message.AppName)
-	if err != nil {
-		return errorReplyFormater(m, "backend error", err)
-	}
-
-	processor := apps.AppsProcessor{
+	processor := glue.Processor{
 		DB: common.GetDBConnection(),
 	}
-	app, err := processor.Get(message.AppName)
-	if err != nil {
-		return errorReplyFormater(m, "backend error", err)
-	}
 
-	// Gather runtime info about the container
-	container := docker.Container{
-		App: app,
-	}
-
-	status, err := container.Status()
+	app, err := processor.Get()
 	if err != nil {
 		log.Printf("backend error: %v\n", err)
 		return errorReplyFormater(m, "backend error", err)
 	}
-	if status == "running" {
-		var err error
-		app.Techs, err = container.GetTechs()
-		if err != nil {
-			log.Printf("backend error: %v\n", err)
-			return errorReplyFormater(m, "backend error", err)
-		}
-		app.PrimaryTech, err = container.GetPrimaryTech()
-		if err != nil {
-			log.Printf("backend error: %v\n", err)
-			return errorReplyFormater(m, "backend error", err)
-		}
-
-		processList, err := container.GetSystemProcesses()
-		if err != nil {
-			log.Printf("backend error: %v\n", err)
-			return errorReplyFormater(m, "backend error", err)
-		}
-
-		flags, err := detector.Check(processList)
-		if err != nil {
-			log.Printf("backend error: %v\n", err)
-			return errorReplyFormater(m, "backend error", err)
-		}
-		app.Flags = flags.String()
-	}
 
 	// Assembling reply message
 	reply := ReplyMessage{
@@ -200,7 +152,6 @@ func getEventHandler(m *nats.Msg, message *RequestMessage) error {
 
 // Create a new app
 func createEventHandler(m *nats.Msg, message *RequestMessage) error {
-
 	appTemplate := apps.App{}
 	body := []byte(message.Payload)
 	err := json.Unmarshal(body, &appTemplate)
@@ -210,48 +161,17 @@ func createEventHandler(m *nats.Msg, message *RequestMessage) error {
 		return err
 	}
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
 	}
-	err = processor.New(message.AppName, appTemplate.SSHPort, appTemplate.HTTPPort, appTemplate.Image, appTemplate.CPU, appTemplate.Memory)
-	if err != nil {
-		if validationError, ok := err.(apps.ValidationError); ok {
-			log.Println("ERROR create application problem (validation problem): " + validationError.Error())
-			publish(message.AppName, "validation problem", true)
-			return err
-		}
-		log.Println("ERROR create application problem (processor.New): " + err.Error())
-		publish(message.AppName, "backend problem", true)
+	err = processor.Create(appTemplate)
+	if err != nil && strings.Contains(err.Error(), "validation error") {
+		publish(message.AppName, "validation error", true)
 		return err
-	}
-
-	container := docker.Container{
-		App: &appTemplate,
-	}
-
-	err = container.Create()
-	if err != nil {
-		log.Println("ERROR create application problem (container.Create): " + err.Error())
-		publish(message.AppName, "backend problem", true)
-		return err
-	}
-
-	// Restore from snapshot if it's noted in the request
-	if len(appTemplate.Snapshot) > 0 {
-		log.Printf("App %s is going to be created from %s snapshot\n", message.AppName, appTemplate.Snapshot)
-
-		// Restore the data
-		err = snapshotProcessor.RestoreSnapshot(appTemplate.Snapshot, message.AppName)
-		if err != nil {
-			log.Println("ERROR restore snapshot error: " + err.Error())
-			publish(message.AppName, "backend problem", true)
-			return err
-		}
-	}
-
-	err = container.Start()
-	if err != nil {
-		log.Println("ERROR create application problem (container.Start): " + err.Error())
+	} else if err != nil {
+		log.Println("ERROR create application problem: " + err.Error())
 		publish(message.AppName, "backend problem", true)
 		return err
 	}
@@ -273,17 +193,17 @@ func registerEventHandler(m *nats.Msg, message *RequestMessage) error {
 		return err
 	}
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
 	}
-	err = processor.New(message.AppName, appTemplate.SSHPort, appTemplate.HTTPPort, appTemplate.Image, appTemplate.CPU, appTemplate.Memory)
-	if err != nil {
-		if validationError, ok := err.(apps.ValidationError); ok {
-			log.Println("ERROR create application problem (validation): " + validationError.Error())
-			publish(message.AppName, "validation problem", true)
-			return err
-		}
-		log.Println("ERROR create application problem (processor.New): " + err.Error())
+	err = processor.Create(appTemplate)
+	if err != nil && strings.Contains(err.Error(), "validation error") {
+		publish(message.AppName, "validation error", true)
+		return err
+	} else if err != nil {
+		log.Println("ERROR create application problem: " + err.Error())
 		publish(message.AppName, "backend problem", true)
 		return err
 	}
@@ -304,306 +224,155 @@ func updateEventHandler(m *nats.Msg, message *RequestMessage) error {
 		return err
 	}
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
 	}
-	app, err := processor.Update(message.AppName, appTemplate.SSHPort, appTemplate.HTTPPort, appTemplate.Image, appTemplate.CPU, appTemplate.Memory)
-	if err != nil {
-		if validationError, ok := err.(apps.ValidationError); ok {
-			log.Println("ERROR update application problem: " + validationError.Error())
-			publish(message.AppName, "backend problem", true)
-			return err
-		}
-		log.Println("ERROR update application problem: " + err.Error())
+	err = processor.Update(appTemplate)
+	if err != nil && strings.Contains(err.Error(), "validation error") {
+		publish(message.AppName, "validation error", true)
+		return err
+	} else if err != nil {
+		log.Println("ERROR create application problem: " + err.Error())
 		publish(message.AppName, "backend problem", true)
 		return err
 	}
 
-	container := docker.Container{
-		App: app,
-	}
-
-	err = container.Destroy()
-	if err != nil && err.Error() == "no container found" {
-		// We don't care if the container didn't exist anyway
-		err = nil
-	}
-	if err != nil {
-		log.Println("ERROR update application problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
-		return err
-	}
-
-	err = container.Create()
-	if err != nil {
-		log.Println("ERROR update application problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
-		return err
-	}
-
-	err = container.Start()
-	if err != nil {
-		log.Println("ERROR update application problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
-		return err
-	}
-
-	publish(app.Name, "updated", false)
+	publish(message.AppName, "updated", false)
 	return nil
 }
 
 // Delete one app
 func deleteEventHandler(m *nats.Msg, message *RequestMessage) error {
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
 	}
-	app, err := processor.Get(message.AppName)
-	if err != nil {
-		log.Println("ERROR: delete app:", err.Error())
-	}
-
-	container := docker.Container{
-		App: app,
-	}
-
-	status, err := container.Status()
+	err := processor.Delete()
 	if err != nil {
 		log.Println("ERROR delete application problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
+		publish(message.AppName, "backend problem", true)
 		return err
 	}
 
-	if status != "no-container" {
-		// We stop the container first
-		err = container.Stop()
-		if err != nil {
-			log.Println("ERROR delete application problem: " + err.Error())
-			publish(app.Name, "backend problem", true)
-			return err
-		}
-
-		// Then delete it
-		err = container.Delete()
-		if err != nil {
-			log.Println("ERROR delete application problem: " + err.Error())
-			publish(app.Name, "backend problem", true)
-			return err
-		}
-	}
-
-	err = processor.Delete(app.Name)
-	if err != nil {
-		log.Println("ERROR delete application problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
-		return err
-	}
-
-	publish(app.Name, "deleted", false)
+	publish(message.AppName, "deleted", false)
 
 	return nil
 }
 
 // Stop existing app
 func stopEventHandler(m *nats.Msg, message *RequestMessage) error {
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
 	}
-	app, err := processor.Get(message.AppName)
+	err := processor.Stop()
 	if err != nil {
 		log.Println("ERROR stop application problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
+		publish(message.AppName, "backend problem", true)
 		return err
 	}
 
-	container := docker.Container{
-		App: app,
-	}
-
-	status, err := container.Status()
-	if err != nil {
-		log.Println("ERROR stop application problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
-		return err
-	}
-
-	// Stop the container only when it exists
-	if status != "no-container" {
-		err = container.Stop()
-		if err != nil {
-			log.Println("ERROR stop application problem: " + err.Error())
-			publish(app.Name, "backend problem", true)
-			return err
-		}
-	}
-
-	publish(app.Name, "stopped", false)
+	publish(message.AppName, "stopped", false)
 
 	return nil
 }
 
 // Start existing app
 func startEventHandler(m *nats.Msg, message *RequestMessage) error {
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
 	}
-	app, err := processor.Get(message.AppName)
+	err := processor.Start()
 	if err != nil {
 		log.Println("ERROR start application problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
+		publish(message.AppName, "backend problem", true)
 		return err
 	}
 
-	container := docker.Container{
-		App: app,
-	}
-
-	status, err := container.Status()
-	if err != nil {
-		return err
-	}
-	if status == "no-container" {
-		err = container.Create()
-		if err != nil {
-			log.Println("ERROR start application problem: " + err.Error())
-			publish(app.Name, "backend problem", true)
-			return err
-		}
-	}
-
-	err = container.Start()
-	if err != nil {
-		log.Println("ERROR start application problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
-		return err
-	}
-
-	publish(app.Name, "started", false)
+	publish(message.AppName, "started", false)
 
 	return nil
 }
 
 // Restart existing app
 func restartEventHandler(m *nats.Msg, message *RequestMessage) error {
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
 	}
-	app, err := processor.Get(message.AppName)
+	err := processor.Restart()
 	if err != nil {
 		log.Println("ERROR restart application problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
+		publish(message.AppName, "backend problem", true)
 		return err
 	}
 
-	container := docker.Container{
-		App: app,
-	}
-
-	err = container.Restart()
-	if err != nil {
-		log.Println("ERROR restart application problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
-		return err
-	}
-
-	publish(app.Name, "restarted", false)
+	publish(message.AppName, "restarted", false)
 
 	return nil
 }
 
 // Copies body of the request into /srv/.ssh/authorized_keys
 func updateKeysEventHandler(m *nats.Msg, message *RequestMessage) error {
-	err := waitForApp(message.AppName)
+	body := message.Payload
+
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
+	}
+	err := processor.UpdateKeys(body)
 	if err != nil {
-		log.Println("ERROR enable tech problem: " + err.Error())
+		log.Println("ERROR update keys problem: " + err.Error())
 		publish(message.AppName, "backend problem", true)
 		return err
 	}
 
-	body := message.Payload
-
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
-	}
-	app, err := processor.Get(message.AppName)
-	if err != nil {
-		log.Println("ERROR keys update problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
-		return err
-	}
-
-	container := docker.Container{
-		App: app,
-	}
-
-	err = container.SetFileContent(sshPubKeysLocation, body+"\n", "0600")
-	if err != nil {
-		log.Println("ERROR keys update problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
-		return err
-	}
-
-	publish(app.Name, "keys updated", false)
+	publish(message.AppName, "keys updated", false)
 
 	return nil
 }
 
 // Set password for the app user in the container
 func setPasswordEventHandler(m *nats.Msg, message *RequestMessage) error {
-	err := waitForApp(message.AppName)
+	password := message.Payload
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
+	}
+	err := processor.SetPassword(password)
+
 	if err != nil {
-		log.Println("ERROR enable tech problem: " + err.Error())
+		log.Println("ERROR password update problem: " + err.Error())
 		publish(message.AppName, "backend problem", true)
 		return err
 	}
 
-	password := message.Payload
-
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
-	}
-	app, err := processor.Get(message.AppName)
-	if err != nil {
-		log.Println("ERROR password update problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
-		return err
-	}
-
-	container := docker.Container{
-		App: app,
-	}
-
-	err = container.SetPassword(password)
-	if err != nil {
-		log.Println("ERROR password update problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
-		return err
-	}
-
-	publish(app.Name, "password updated", false)
+	publish(message.AppName, "password updated", false)
 
 	return nil
 }
 
 // Application processes
 func processesEventHandler(m *nats.Msg, message *RequestMessage) error {
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
-	}
-	app, err := processor.Get(message.AppName)
-	if err != nil {
-		log.Println("ERROR processes list problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
-		return err
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
 	}
 
-	container := docker.Container{
-		App: app,
-	}
-
-	processes, err := container.GetProcessList()
+	processes, err := processor.Processes()
 	if err != nil {
 		log.Println("ERROR processes list problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
+		publish(message.AppName, "backend problem", true)
 		return err
 	}
 
@@ -614,7 +383,7 @@ func processesEventHandler(m *nats.Msg, message *RequestMessage) error {
 	data, err := json.Marshal(reply)
 	if err != nil {
 		log.Println("ERROR processes list problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
+		publish(message.AppName, "backend problem", true)
 		return err
 	}
 	err = m.Respond(data)
@@ -653,81 +422,39 @@ func enableTechEventHandler(m *nats.Msg, message *RequestMessage) error {
 		version = parts[1]
 	}
 
-	err = waitForApp(message.AppName)
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
+	}
+	processor.EnableTech(service, version)
 	if err != nil {
 		log.Println("ERROR enable tech problem: " + err.Error())
 		publish(message.AppName, "backend problem", true)
 		return err
 	}
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
-	}
-	app, err := processor.Get(message.AppName)
-	if err != nil {
-		log.Println("ERROR enable tech problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
-		return err
-	}
-
-	container := docker.Container{
-		App: app,
-	}
-
-	err = container.SetTechnology(service, version)
-	if err != nil {
-		log.Println("ERROR enable tech problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
-		return err
-	}
-
-	publish(app.Name, "tech updated", false)
+	publish(message.AppName, "tech updated", false)
 
 	return nil
 }
 
 // Rebuilds existing app, it keeps the data but creates the container again
 func rebuildEventHandler(m *nats.Msg, message *RequestMessage) error {
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
 	}
-	app, err := processor.Get(message.AppName)
+
+	err := processor.Rebuild()
 	if err != nil {
 		log.Println("ERROR rebuild app problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
+		publish(message.AppName, "backend problem", true)
 		return err
 	}
 
-	container := docker.Container{
-		App: app,
-	}
-
-	err = container.Destroy()
-	if err != nil && err.Error() == "no container found" {
-		// We don't care if the container didn't exist anyway
-		err = nil
-	}
-	if err != nil {
-		log.Println("ERROR rebuild app problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
-		return err
-	}
-
-	err = container.Create()
-	if err != nil {
-		log.Println("ERROR rebuild app problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
-		return err
-	}
-
-	err = container.Start()
-	if err != nil {
-		log.Println("ERROR rebuild app problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
-		return err
-	}
-
-	publish(app.Name, "app rebuild", false)
+	publish(message.AppName, "app rebuild", false)
 
 	return nil
 }
@@ -736,10 +463,12 @@ func rebuildEventHandler(m *nats.Msg, message *RequestMessage) error {
 func addLabelEventHandler(m *nats.Msg, message *RequestMessage) error {
 	label := message.Payload
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
 	}
-	err := processor.AddLabel(message.AppName, label)
+	err := processor.AddLabel(label)
 	if err != nil {
 		log.Println("ERROR add label problem: " + err.Error())
 		publish(message.AppName, "backend problem", true)
@@ -755,10 +484,12 @@ func addLabelEventHandler(m *nats.Msg, message *RequestMessage) error {
 func removeLabelEventHandler(m *nats.Msg, message *RequestMessage) error {
 	label := message.Payload
 
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
 	}
-	err := processor.RemoveLabel(message.AppName, label)
+	err := processor.RemoveLabel(label)
 	if err != nil {
 		log.Println("ERROR remove label problem: " + err.Error())
 		publish(message.AppName, "backend problem", true)
@@ -793,12 +524,18 @@ func listOrphansEventHandler(m *nats.Msg, message *RequestMessage) error {
 }
 
 /*
-getNoteEventHandler returns info about the node including performance index
+getNodeEventHandler returns info about the node including performance index
 
 
 */
-func getNoteEventHandler(m *nats.Msg, message *RequestMessage) error {
-	node, err := node.GetNodeInfo()
+func getNodeEventHandler(m *nats.Msg, message *RequestMessage) error {
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
+	}
+
+	node, err := processor.GetNode()
 	if err != nil {
 		log.Println("ERROR performance index problem: " + err.Error())
 		publish(message.AppName, "backend problem", true)
@@ -834,7 +571,13 @@ Payload: no payload needed
 Response: notification when it's done or error
 */
 func createSnapshotEventHandler(m *nats.Msg, message *RequestMessage) error {
-	_, err := snapshotProcessor.CreateSnapshot(message.AppName, strings.Split(message.Payload, ","))
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
+	}
+
+	err := processor.CreateSnapshot(strings.Split(message.Payload, ","))
 	if err != nil {
 		log.Println("ERROR create snapshot error: " + err.Error())
 		publish(message.AppName, "backend problem", true)
@@ -858,64 +601,16 @@ Payload: string with the snapshot name
 Response: notification when it's done or error
 */
 func restoreFromSnapshotEventHandler(m *nats.Msg, message *RequestMessage) error {
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
-	}
-	app, err := processor.Get(message.AppName)
-	if err != nil {
-		log.Println("ERROR restore snapshot problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
-		return err
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
 	}
 
-	container := docker.Container{
-		App: app,
-	}
-
-	// Stop the container
-	status, err := container.Status()
-	if err != nil {
-		log.Println("ERROR restore snapshot problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
-		return err
-	}
-
-	// Stop the container only when it exists
-	if status != "no-container" {
-		err = container.Stop()
-		if err != nil {
-			log.Println("ERROR restore snapshot problem: " + err.Error())
-			publish(app.Name, "backend problem", true)
-			return err
-		}
-	}
-
-	// Restore the data
-	err = snapshotProcessor.RestoreSnapshot(message.Payload, message.AppName)
-	if err != nil {
-		log.Println("ERROR restore snapshot error: " + err.Error())
-		publish(message.AppName, "backend problem", true)
-		return err
-	}
-
-	// Start the container
-	status, err = container.Status()
-	if err != nil {
-		return err
-	}
-	if status == "no-container" {
-		err = container.Create()
-		if err != nil {
-			log.Println("ERROR start application problem: " + err.Error())
-			publish(app.Name, "backend problem", true)
-			return err
-		}
-	}
-
-	err = container.Start()
+	err := processor.RestoreFromSnapshot(message.Payload)
 	if err != nil {
 		log.Println("ERROR start application problem: " + err.Error())
-		publish(app.Name, "backend problem", true)
+		publish(message.AppName, "backend problem", true)
 		return err
 	}
 
@@ -934,21 +629,18 @@ Payload: no payload needed
 Response: replies with list of snapshots or an error message
 */
 func listSnapshotsEventHandler(m *nats.Msg, message *RequestMessage) error {
-	snapshots, err := snapshotProcessor.ListAppSnapshots(message.AppName)
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
+	}
+	snapshots, err := processor.ListSnapshots()
 	if err != nil {
 		return errorReplyFormater(m, "backend error", err)
 	}
 
-	var output SnapshotsMetadata
-	for _, snapshot := range snapshots {
-		output = append(output, SnapshotMetadata{
-			Key:      snapshot.KeyName(snapshotProcessor.IndexLabel),
-			Metadata: snapshot,
-		})
-	}
-
 	reply := ReplyMessage{
-		Payload: output,
+		Payload: snapshots,
 	}
 
 	data, err := json.Marshal(reply)
@@ -970,21 +662,18 @@ Payload: list of appNames separated by comma (no spaces)
 Response: replies with list of snapshots or an error message
 */
 func listAppsSnapshotsEventHandler(m *nats.Msg, message *RequestMessage) error {
-	snapshots, err := snapshotProcessor.ListAppsSnapshots(strings.Split(message.Payload, ","))
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
+	}
+	snapshots, err := processor.ListAppsSnapshots(strings.Split(message.Payload, ","))
 	if err != nil {
 		return errorReplyFormater(m, "backend error", err)
 	}
 
-	var output SnapshotsMetadata
-	for _, snapshot := range snapshots {
-		output = append(output, SnapshotMetadata{
-			Key:      snapshot.KeyName(snapshotProcessor.IndexLabel),
-			Metadata: snapshot,
-		})
-	}
-
 	reply := ReplyMessage{
-		Payload: output,
+		Payload: snapshots,
 	}
 
 	data, err := json.Marshal(reply)
@@ -1006,21 +695,18 @@ Payload: snapshot label
 Response: replies with list of snapshots or an error message
 */
 func listSnapshotsByLabelEventHandler(m *nats.Msg, message *RequestMessage) error {
-	snapshots, err := snapshotProcessor.ListAppsSnapshotsByLabel(message.Payload)
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
+	}
+	snapshots, err := processor.ListSnapshotsByLabel(message.Payload)
 	if err != nil {
 		return errorReplyFormater(m, "backend error", err)
 	}
 
-	var output SnapshotsMetadata
-	for _, snapshot := range snapshots {
-		output = append(output, SnapshotMetadata{
-			Key:      snapshot.KeyName(snapshotProcessor.IndexLabel),
-			Metadata: snapshot,
-		})
-	}
-
 	reply := ReplyMessage{
-		Payload: output,
+		Payload: snapshots,
 	}
 
 	data, err := json.Marshal(reply)
@@ -1042,16 +728,17 @@ Payload: snapshot's key
 Response: snapshot metadata
 */
 func getSnapshotEventHandler(m *nats.Msg, message *RequestMessage) error {
-	snapshot, err := snapshotProcessor.GetSnapshot(message.Payload)
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
+	}
+	snapshot, err := processor.GetSnapshot(message.Payload)
 	if err != nil {
 		return errorReplyFormater(m, "backend error", err)
 	}
-	output := SnapshotMetadata{
-		Key:      snapshot.KeyName(snapshotProcessor.IndexLabel),
-		Metadata: snapshot,
-	}
 
-	data, err := json.Marshal(output)
+	data, err := json.Marshal(snapshot)
 	if err != nil {
 		return errorReplyFormater(m, "reply formatter error", err)
 	}
@@ -1071,7 +758,12 @@ Payload: string with a snapshot name (key)
 Response: string with the URL
 */
 func getSnapshotDownloadLinkEventHandler(m *nats.Msg, message *RequestMessage) error {
-	link, err := snapshotProcessor.GetDownloadLink(message.Payload)
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
+	}
+	link, err := processor.GetSnapshotDownloadLink(message.Payload)
 	if err != nil {
 		return errorReplyFormater(m, "backend error", err)
 	}
@@ -1100,7 +792,13 @@ Payload: string with a snapshot name
 Response: notification when it's done or error
 */
 func deleteSnapshotEventHandler(m *nats.Msg, message *RequestMessage) error {
-	err := snapshotProcessor.DeleteSnapshot(message.Payload)
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
+	}
+
+	err := processor.DeleteSnapshot(message.Payload)
 	if err != nil {
 		return errorReplyFormater(m, "backend error", err)
 	}
@@ -1119,7 +817,13 @@ Payload: no payload needed
 Response: notification when it's done or error
 */
 func deleteAppSnapshotsEventHandler(m *nats.Msg, message *RequestMessage) error {
-	err := snapshotProcessor.DeleteAppSnapshots(message.AppName)
+	processor := glue.Processor{
+		AppName:           message.AppName,
+		DB:                common.GetDBConnection(),
+		SnapshotProcessor: &snapshotProcessor,
+	}
+
+	err := processor.DeleteAppSnapshots()
 	if err != nil {
 		return errorReplyFormater(m, "backend error", err)
 	}
diff --git a/main.go b/main.go
index 2210c05..606dfc2 100644
--- a/main.go
+++ b/main.go
@@ -66,19 +66,19 @@ func main() {
 	t := &Template{}
 
 	// Stats loop
-	go func() {
-		for {
-			log.Println("Stats gathering started")
-			start := time.Now()
-			err := gatherStats()
-			if err != nil {
-				log.Println("LOOP ERROR:", err.Error())
-			}
-			elapsed := time.Since(start)
-			log.Printf("Stats gathering elapsed time: %.2fs\n", elapsed.Seconds())
-			time.Sleep(300 * time.Second)
-		}
-	}()
+	// go func() {
+	// 	for {
+	// 		log.Println("Stats gathering started")
+	// 		start := time.Now()
+	// 		err := gatherStats()
+	// 		if err != nil {
+	// 			log.Println("LOOP ERROR:", err.Error())
+	// 		}
+	// 		elapsed := time.Since(start)
+	// 		log.Printf("Stats gathering elapsed time: %.2fs\n", elapsed.Seconds())
+	// 		time.Sleep(300 * time.Second)
+	// 	}
+	// }()
 
 	// Node stats
 	go func() {
diff --git a/tools.go b/tools.go
index e594568..6b6b0c9 100644
--- a/tools.go
+++ b/tools.go
@@ -2,15 +2,10 @@ package main
 
 import (
 	"encoding/json"
-	"errors"
 	"fmt"
 	"log"
-	"time"
 
 	"github.com/nats-io/nats.go"
-	"github.com/rosti-cz/node-api/apps"
-	"github.com/rosti-cz/node-api/common"
-	docker "github.com/rosti-cz/node-api/containers"
 )
 
 func errorReplyFormater(m *nats.Msg, message string, err error) error {
@@ -54,43 +49,3 @@ func publish(appName string, state string, isErr bool) {
 		log.Println("ERROR: publish:", err.Error())
 	}
 }
-
-// waitForApp waits until app is ready or timeout is reached.
-// It's used in some async calls that need at least part of the
-// environment prepared.
-func waitForApp(appName string) error {
-	processor := apps.AppsProcessor{
-		DB: common.GetDBConnection(),
-	}
-
-	sleepFor := 5 * time.Second
-	loops := 6
-
-	for i := 0; i < loops; i++ {
-		err := updateState(appName)
-		if err != nil {
-			time.Sleep(sleepFor)
-			continue
-		}
-
-		app, err := processor.Get(appName)
-		if err != nil {
-			return err
-		}
-
-		container := docker.Container{
-			App: app,
-		}
-
-		status, err := container.Status()
-
-		if status == "running" {
-			return nil
-		}
-
-		time.Sleep(sleepFor)
-		continue
-	}
-
-	return errors.New("timeout reached")
-}
diff --git a/types.go b/types.go
index 7305f42..b38aa20 100644
--- a/types.go
+++ b/types.go
@@ -2,13 +2,8 @@ package main
 
 import (
 	"encoding/json"
-
-	"github.com/rosti-cz/node-api/apps"
 )
 
-// Path where authorized keys are
-const sshPubKeysLocation = "/srv/.ssh/authorized_keys"
-
 // RequestMessage message
 type RequestMessage struct {
 	AppName string `json:"name"`
@@ -65,11 +60,8 @@ type QuickServices struct {
 	Redis     bool `json:"redis"`
 }
 
-// SnapshotMetadata is snapshot structure encapsulation that combines key and metadata about the snapshot
-type SnapshotMetadata struct {
-	Key      string        `json:"key"`
-	Metadata apps.Snapshot `json:"metadata"`
+// Set technology
+type Technology struct {
+	Name    string
+	Version string
 }
-
-// SnapshotsMetadata is returned by handlers
-type SnapshotsMetadata []SnapshotMetadata