wip: move to the mongodb operator

use podantiaffinity to spread mongo pods over the cluster nodes

Author: Romain JACQUET

charts/mongodb-operated/Chart.yaml

@@ -8,7 +8,7 @@ type: application
 # This is the chart version. This version number should be incremented each time you make changes
 # to the chart and its templates, including the app version.
 # Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.2.0
+version: 0.2.1
 
 # This is the version number of the application being deployed. This version number should be
 # incremented each time you make changes to the application. Versions are not expected to

charts/mongodb-operated/templates/mongdb-community.yaml

@@ -22,6 +22,10 @@ spec:
           imagePullSecrets:
             {{- toYaml . | nindent 12 }}
           {{- end }}
+          {{- with .Values.affinity }}
+          affinity:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
           containers:
             - name: mongod
               imagePullPolicy: {{ .Values.image.pullPolicy }}

charts/mongodb-operated/values.yaml

@@ -22,6 +22,20 @@ image:
 # This is for the secrets for pulling an image from a private repository more information can be found here: https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/
 imagePullSecrets: []
 
+# could be used to have one replica per node
+# https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/#affinity-and-anti-affinity
+affinity: {}
+  # podAntiAffinity:
+  #   preferredDuringSchedulingIgnoredDuringExecution:
+  #   - weigth: 100
+  #     podAffinityTerm:
+  #     labelSelector:
+  #       matchExpressions:
+  #       - key: app
+  #         operator: In
+  #         values:
+  #         - appsdb-mongodb-operated-svc
+  #       topologyKey: "kubernetes.io/hostname"
 
 # This section builds out the service account more information can be found here: https://kubernetes.io/docs/concepts/security/service-accounts/
 # workaround for https://github.com/mongodb/mongodb-kubernetes/issues/489