Check if the k0s version has the ability to take/restore backups (#153)

* Check if k0s version has the ability to take/restore backups * Fix
k0sproject · Jun 17, 2021 · cebe904 · cebe904
1 parent f51a48d
commit cebe904
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diff --git a/phase/backup.go b/phase/backup.go
@@ -33,6 +33,11 @@ func (p *Backup) Prepare(config *config.Cluster) error {
 	if leader.Metadata.K0sRunningVersion == "" {
 		return fmt.Errorf("failed to find a running controller")
 	}
+
+	if leader.Exec(leader.Configurer.K0sCmdf("backup --help")) != nil {
+		return fmt.Errorf("the version of k0s on the host does not support taking backups")
+	}
+
 	p.leader = leader
 	return nil
 }

diff --git a/phase/restore.go b/phase/restore.go
@@ -30,6 +30,11 @@ func (p *Restore) Prepare(config *config.Cluster) error {
 	log.Debugf("restore from: %s", p.RestoreFrom)
 	p.Config = config
 	p.leader = p.Config.Spec.K0sLeader()
+
+	if p.RestoreFrom != "" && p.leader.Exec(p.leader.Configurer.K0sCmdf("restore --help")) != nil {
+		return fmt.Errorf("the version of k0s on the host does not support restoring backups")
+	}
+
 	log.Debugf("restore leader: %s", p.leader)
 	log.Debugf("restore leader state: %+v", p.leader.Metadata)
 	return nil