feat:Add test scripts into Notes.txt, and image pull policy (#15354)

Signed-off-by: Aisuko <urakiny@gmail.com>

incubator/mysqlha/Chart.yaml

@@ -1,6 +1,6 @@
 apiVersion: v1
 name: mysqlha
-version: 0.7.1
+version: 0.8.0
 appVersion: 5.7.13
 description: MySQL cluster with a single master and zero or more slave replicas
 keywords:

incubator/mysqlha/README.md

@@ -37,6 +37,7 @@ The following table lists the configurable parameters of the MySQL chart and the
 | -----------------------------------------    | ------------------------------------------------- | -------------------------------------- |
 | `mysqlImage`                                 | `mysql` image and tag.                            | `mysql:5.7.13`                         |
 | `xtraBackupImage`                            | `xtrabackup` image and tag.                       | `gcr.io/google-samples/xtrabackup:1.0` |
+| `imagePullPolicy`                            | Image pull policy.                                | `IfNotPresent`                         |
 | `replicaCount`                               | Number of MySQL replicas                          | 3                                      |
 | `mysqlRootPassword`                          | Password for the `root` user.                     | Randomly generated                     |
 | `mysqlUser`                                  | Username of new user to create.                   | `nil`                                  |

incubator/mysqlha/templates/NOTES.txt

@@ -12,8 +12,16 @@ To connect to your database:
 
 2. Run a pod to use as a client:
 
-    kubectl run mysql-client --image={{ .Values.mysqlImage }} -it --rm --restart=Never -- /bin/sh
+    kubectl run mysql-client --image={{ .Values.mysqlImage }} -it --rm --restart='Never' --namespace {{ .Release.Namespace }} -- /bin/sh
 
-2. Open a connection to one of the MySQL pods
+3. To connect to Master service (read/write):
 
-    mysql -h {{ template "fullname" . }}-0.{{ template "fullname" . }} -p
+    mysql -h {{ template "fullname" . }}-0.{{ template "fullname" . }} -u root -p
+
+{{- if lt 1 (.Values.mysqlha.replicaCount | int64) }}
+
+4. To connect to slave service (read-only):
+   
+   mysql -h {{ template "fullname" . }}-readonly -u root -p
+
+{{- end }}

incubator/mysqlha/templates/statefulset.yaml

@@ -25,6 +25,7 @@ spec:
       initContainers:
       - name: clone-mysql
         image: {{ .Values.xtraBackupImage }}
+        imagePullPolicy: {{ .Values.imagePullPolicy | quote }}
         command:
           - bash
           - "-c"
@@ -58,6 +59,7 @@ spec:
           mountPath: /etc/mysql/conf.d
       - name: init-mysql
         image: {{ .Values.mysqlImage }}
+        imagePullPolicy: {{ .Values.imagePullPolicy | quote }}
         command: ["/bin/bash"]
         args:
           - "-c"
@@ -89,6 +91,7 @@ spec:
       containers:
       - name: mysql
         image: {{ .Values.mysqlImage }}
+        imagePullPolicy: {{ .Values.imagePullPolicy | quote }}
         env:
         - name: MYSQL_DATABASE
           value: {{ default "" .Values.mysqlha.mysqlDatabase | quote }}
@@ -146,6 +149,7 @@ spec:
           timeoutSeconds: 1
       - name: xtrabackup
         image: {{ .Values.xtraBackupImage }}
+        imagePullPolicy: {{ .Values.imagePullPolicy | quote }}
         env:
         - name: MYSQL_PWD
           valueFrom:
@@ -226,7 +230,7 @@ spec:
       {{- if .Values.metrics.enabled }}
       - name: metrics
         image: "{{ .Values.metrics.image }}:{{ .Values.metrics.imageTag }}"
-        imagePullPolicy: {{ .Values.pullPolicy | quote }}
+        imagePullPolicy: {{ .Values.imagePullPolicy | quote }}
         {{- if .Values.mysqlha.mysqlAllowEmptyPassword }}
         command: ['sh', '-c', 'DATA_SOURCE_NAME="root@(localhost:3306)/" /bin/mysqld_exporter' ]
         {{- else }}

incubator/mysqlha/values.yaml

@@ -4,6 +4,12 @@
 mysqlImage: mysql:5.7.13
 xtraBackupImage: gcr.io/google-samples/xtrabackup:1.0
 
+## Specify an imagePullPolicy (Required)
+## It's recommended to change this to 'Always' if the image tag is 'latest'
+## ref: http://kubernetes.io/docs/user-guide/images/#updating-images
+##
+imagePullPolicy: IfNotPresent
+
 mysqlha:
   replicaCount: 3
 
@@ -76,7 +82,6 @@ metrics:
   enabled: false
   image: prom/mysqld-exporter
   imageTag: v0.10.0
-  imagePullPolicy: IfNotPresent
   annotations: {}
 
   livenessProbe: