Several fixes for backupninja pipelines

* Do not fail if maas is not enabled
* Add backup server to known_hosts, so scp will not fail
* Additional checks for pillar data

PROD-30107
PROD-30108

Change-Id: Id5043717220de80c25f9d80761c1ddfa0910b083
diff --git a/backupninja-restore-pipeline.groovy b/backupninja-restore-pipeline.groovy
index b38cd6a..e412c96 100644
--- a/backupninja-restore-pipeline.groovy
+++ b/backupninja-restore-pipeline.groovy
@@ -2,6 +2,7 @@
 def salt = new com.mirantis.mk.Salt()
 def python = new com.mirantis.mk.Python()
 def pepperEnv = "pepperEnv"
+def maasNodes
 
 timeout(time: 12, unit: 'HOURS') {
     node() {
@@ -11,7 +12,7 @@
         stage('Salt-Master restore') {
             common.infoMsg('Verify pillar for salt-master backups')
             try {
-                def masterPillar = salt.getPillar(pepperEnv, "I@salt:master", 'salt:minion:initial_data')
+                def masterPillar = salt.getPillar(pepperEnv, "I@salt:master", 'salt:master:initial_data')
                 if(masterPillar['return'].isEmpty()) {
                     throw new Exception('Problem with salt-master pillar.')
                 }
@@ -25,6 +26,7 @@
                 common.errorMsg('Please fix your pillar. For more information check docs: https://docs.mirantis.com/mcp/latest/mcp-operations-guide/backup-restore/salt-master/salt-master-restore.html')
                 return
             }
+            maasNodes = salt.getMinions(pepperEnv, 'I@maas:server')
             common.infoMsg('Performing restore')
             salt.enforceState(['saltId': pepperEnv, 'target': 'I@salt:master', 'state': 'salt.master.restore'])
             salt.enforceState(['saltId': pepperEnv, 'target': 'I@salt:master', 'state': 'salt.minion.restore'])
@@ -36,20 +38,22 @@
             common.infoMsg('Salt-master CA')
             salt.cmdRun(pepperEnv, 'I@salt:master', "ls -la /etc/pki/ca/salt_master_ca/")
         }
-        stage('MAAS Restore') {
-            common.infoMsg('Verify pillar for MaaS backup')
-            try {
-                def maaSPillar = salt.getPillar(pepperEnv, "I@maas:server", 'maas:region:database:initial_data')
-                if(maaSPillar['return'].isEmpty()) {
-                    throw new Exception('Problem with MaaS pillar.')
+        if (!maasNodes.isEmpty()) {
+            stage('MAAS Restore') {
+                common.infoMsg('Verify pillar for MaaS backup')
+                try {
+                    def maaSPillar = salt.getPillar(pepperEnv, "I@maas:server", 'maas:region:database:initial_data')
+                    if (maaSPillar['return'].isEmpty()) {
+                        throw new Exception('Problem with MaaS pillar.')
+                    }
                 }
+                catch (Exception e) {
+                    common.errorMsg(e.getMessage())
+                    common.errorMsg('Please fix your pillar. For more information check docs: https://docs.mirantis.com/mcp/latest/mcp-operations-guide/backup-restore/backupninja-postgresql/backupninja-postgresql-restore.html')
+                    return
+                }
+                salt.enforceState(['saltId': pepperEnv, 'target': 'I@maas:region', 'state': 'maas.region'])
             }
-            catch (Exception e){
-                common.errorMsg(e.getMessage())
-                common.errorMsg('Please fix your pillar. For more information check docs: https://docs.mirantis.com/mcp/latest/mcp-operations-guide/backup-restore/backupninja-postgresql/backupninja-postgresql-restore.html')
-                return
-            }
-            salt.enforceState(['saltId': pepperEnv, 'target': 'I@maas:region', 'state': 'maas.region'])
         }
     }
 }