fix: mongo init issues (helm#7772)

This fixes issues where the init container will stay up indefinitely because the running 'mongod' process cannot join the replicaset

Signed-off-by: Salim <[email protected]>
Signed-off-by: Jakob Niggel <[email protected]>

Author: ssalaues

stable/mongodb-replicaset/Chart.yaml

@@ -1,6 +1,6 @@
 name: mongodb-replicaset
 home: https://github.com/mongodb/mongo
-version: 3.5.6
+version: 3.5.7
 appVersion: 3.6
 description: NoSQL document-oriented database that stores JSON-like documents with
   dynamic schemas, simplifying the integration of data in content-driven applications.

stable/mongodb-replicaset/init/on-start.sh

@@ -116,7 +116,11 @@ for peer in "${peers[@]}"; do
     if mongo admin --host "$peer" "${admin_creds[@]}" "${ssl_args[@]}" --eval "rs.isMaster()" | grep '"ismaster" : true'; then
         log "Found master: $peer"
         log "Adding myself ($service_name) to replica set..."
-        mongo admin --host "$peer" "${admin_creds[@]}" "${ssl_args[@]}" --eval "rs.add('$service_name')"
+        if mongo admin --host "$peer" "${admin_creds[@]}" "${ssl_args[@]}" --eval "rs.add('$service_name')" | grep 'Quorum check failed'; then
+            log 'Quorum check failed, unable to join replicaset. Exiting prematurely.'
+            shutdown_mongo
+            exit 1
+        fi
 
         sleep 3