README update

README.md

@@ -4,7 +4,6 @@ This project is covering backup and sync scenarios for Incus instances.
 
 * Backups instances into Restic repository
 * Syncs instances to another incus instance
-* Backs up incus itself
 
 ## KV
 
@@ -22,6 +21,14 @@ Functions of Sentinel depends on user KV values configured on each instance. Her
 | user.sync-target-pool            | pool0     | Target's storage pool                                            |
 | user.sync-target-instance-suffix | -cold     | Instance name suffix at the target side                          |
 
+### Examples
+
+Enabled sync and backup on existing instance:
+
+```
+incus config set <instance name> user.backup=true user.sync=true user.sync-target-remote=<remote_host>
+```
+
 ## Important notes
 
 Only one backup or sync job can run the same time. There is internal queue of jobs that
@@ -32,3 +39,8 @@ Restic needs two environment variables to be set:
 * RESTIC_PASSWORD
 * RESTIC_REPOSITORY
 
+Also its binary needs to be available on the system where sentinel is running.
+
+Sentinel uses Incus's CLI interface, not its API. Currently it can work only on the same machine where Incus is running.
+
+Synced instances have sync and backup flags disabled so if the remote system runs sentinel too it won't interfere with configuration of the main location.

incus/main.go

@@ -48,9 +48,9 @@ func (d *IncusDriver) Sync(sourceInstance string, targetInstance string, targetH
 
 	var cmd *exec.Cmd
 	if len(instances) == 0 {
-		cmd = exec.Command("incus", "copy", sourceInstance, targetHost+":"+targetInstance, "-s", targetPool, "--mode", "push", "--stateless")
+		cmd = exec.Command("incus", "copy", sourceInstance, targetHost+":"+targetInstance, "-s", targetPool, "--mode", "push", "--stateless", "-c", "user.backup=false", "-c", "user.sync=false")
 	} else {
-		cmd = exec.Command("incus", "copy", sourceInstance, targetHost+":"+targetInstance, "-s", targetPool, "--mode", "push", "--stateless", "--refresh")
+		cmd = exec.Command("incus", "copy", sourceInstance, targetHost+":"+targetInstance, "-s", targetPool, "--mode", "push", "--stateless", "-c", "user.backup=false", "-c", "user.sync=false", "--refresh")
 	}
 	out, err := cmd.CombinedOutput()
 	if err != nil {