[kibana] Allow configuring lifecycle events

kibana/README.md

@@ -70,6 +70,7 @@ helm install --name kibana elastic/kibana --set imageTag=7.3.2
 | `ingress`                 | Configurable [ingress](https://kubernetes.io/docs/concepts/services-networking/ingress/) to expose the Kibana service. See [`values.yaml`](./values.yaml) for an example                                                                                                                                                                                       | `enabled: false`                                                                                                          |
 | `service`                 | Configurable [service](https://kubernetes.io/docs/concepts/services-networking/service/) to expose the Kibana service. See [`values.yaml`](./values.yaml) for an example                                                                                                                                                                                       | `type: ClusterIP`<br>`port: 5601`<br>`nodePort:`<br>`annotations: {}`                                                     |
 | `labels`                  | Configurable [label](https://kubernetes.io/docs/concepts/overview/working-with-objects/labels/) applied to all Kibana pods                                                                                                                                                                                                                                     | `{}`                                                                                                                      |
+| `lifecycle`               | Allows you to add lifecycle configuration. See [values.yaml](./values.yaml) for an example of the formatting.                                                                                                                                                                                                                                                  | `{}`                                                                                                                      |
 
 ## Examples
 

kibana/templates/deployment.yaml

@@ -112,6 +112,10 @@ spec:
                 http "{{ .Values.healthCheckPath }}"
         ports:
         - containerPort: {{ .Values.httpPort }}
+{{- if .Values.lifecycle }}
+        lifecycle:
+{{ toYaml .Values.lifecycle | indent 10 }}
+{{- end }}
         resources:
 {{ toYaml .Values.resources | indent 10 }}
         volumeMounts:

kibana/tests/kibana_test.py

@@ -394,3 +394,15 @@ def test_adding_a_secret_mount_without_subpath():
         'mountPath': '/usr/share/elasticsearch/config/certs',
         'name': 'elastic-certificates'
     }
+
+def test_adding_lifecycle_events():
+    config = '''
+lifecycle:
+    postStart:
+        exec:
+            command: ['/bin/true']
+'''
+    r = helm_template(config)
+    d = r['deployment'][name]['spec']['template']['spec']
+    p = d['containers'][0]['lifecycle']['postStart']
+    assert p['exec']['command'][0] == '/bin/true'

kibana/values.yaml

@@ -127,3 +127,11 @@ affinity: {}
 
 nameOverride: ""
 fullnameOverride: ""
+
+lifecycle: {}
+  # preStop:
+  #   exec:
+  #     command: ["/bin/sh", "-c", "echo Hello from the postStart handler > /usr/share/message"]
+  # postStart:
+  #   exec:
+  #     command: ["/bin/sh", "-c", "echo Hello from the postStart handler > /usr/share/message"]