Add pod anti affinity (#491)

* Add pod anti affinity
* Use preferredDuringSchedulingIgnoredDuringExecution for pod anti
affinity

Author: informalict

chart/kube-arangodb/templates/deployment.yaml

@@ -46,6 +46,21 @@ spec:
                           operator: In
                           values:
                             - amd64
+              podAntiAffinity:
+                preferredDuringSchedulingIgnoredDuringExecution:
+                  - weight: 100
+                    podAffinityTerm:
+                      topologyKey: "kubernetes.io/hostname"
+                      labelSelector:
+                        matchExpressions:
+                          - key: app.kubernetes.io/name
+                            operator: In
+                            values:
+                              - {{ template "kube-arangodb.name" . }}
+                          - key: app.kubernetes.io/instance
+                            operator: In
+                            values:
+                              - {{ .Release.Name }}
             hostNetwork: false
             hostPID: false
             hostIPC: false

manifests/arango-backup.yaml

@@ -171,6 +171,21 @@ spec:
                           operator: In
                           values:
                             - amd64
+              podAntiAffinity:
+                preferredDuringSchedulingIgnoredDuringExecution:
+                  - weight: 100
+                    podAffinityTerm:
+                      topologyKey: "kubernetes.io/hostname"
+                      labelSelector:
+                        matchExpressions:
+                          - key: app.kubernetes.io/name
+                            operator: In
+                            values:
+                              - kube-arangodb
+                          - key: app.kubernetes.io/instance
+                            operator: In
+                            values:
+                              - backup
             hostNetwork: false
             hostPID: false
             hostIPC: false

manifests/arango-deployment-replication.yaml

@@ -168,6 +168,21 @@ spec:
                           operator: In
                           values:
                             - amd64
+              podAntiAffinity:
+                preferredDuringSchedulingIgnoredDuringExecution:
+                  - weight: 100
+                    podAffinityTerm:
+                      topologyKey: "kubernetes.io/hostname"
+                      labelSelector:
+                        matchExpressions:
+                          - key: app.kubernetes.io/name
+                            operator: In
+                            values:
+                              - kube-arangodb
+                          - key: app.kubernetes.io/instance
+                            operator: In
+                            values:
+                              - deployment-replication
             hostNetwork: false
             hostPID: false
             hostIPC: false

manifests/arango-deployment.yaml

@@ -215,6 +215,21 @@ spec:
                           operator: In
                           values:
                             - amd64
+              podAntiAffinity:
+                preferredDuringSchedulingIgnoredDuringExecution:
+                  - weight: 100
+                    podAffinityTerm:
+                      topologyKey: "kubernetes.io/hostname"
+                      labelSelector:
+                        matchExpressions:
+                          - key: app.kubernetes.io/name
+                            operator: In
+                            values:
+                              - kube-arangodb
+                          - key: app.kubernetes.io/instance
+                            operator: In
+                            values:
+                              - deployment
             hostNetwork: false
             hostPID: false
             hostIPC: false

manifests/arango-storage.yaml

@@ -200,6 +200,21 @@ spec:
                           operator: In
                           values:
                             - amd64
+              podAntiAffinity:
+                preferredDuringSchedulingIgnoredDuringExecution:
+                  - weight: 100
+                    podAffinityTerm:
+                      topologyKey: "kubernetes.io/hostname"
+                      labelSelector:
+                        matchExpressions:
+                          - key: app.kubernetes.io/name
+                            operator: In
+                            values:
+                              - kube-arangodb
+                          - key: app.kubernetes.io/instance
+                            operator: In
+                            values:
+                              - storage
             hostNetwork: false
             hostPID: false
             hostIPC: false