[bitnami/cassandra] Allow custom entrypoint & cmd

Signed-off-by: Javier Salmeron Garcia <jsalmeron@vmware.com>

bitnami/cassandra/README.md

@@ -245,6 +245,10 @@ kubectl create configmap init-db --from-file=path/to/scripts
 helm install bitnami/cassandra --set initDBConfigMap=init-db
 ```
 
+## Using a custom Cassandra image
+
+This chart uses the [Bitnami cassandra](https://github.com/bitnami/bitnami-docker-cassandra) image by default. In case you want to use a different image, you can redefine the container entrypoint by setting the `entrypoint` and `cmd` values.
+
 ## Upgrade
 
 ### 2.0.0

bitnami/cassandra/templates/networkpolicy.yaml

@@ -28,7 +28,7 @@ spec:
         - podSelector:
             matchLabels:
               app: {{ template "cassandra.name" . }}
-              release: {{ .Release.Name }}      
+              release: {{ .Release.Name }}
     # Internal ports
     - ports:
       - port: intra
@@ -38,7 +38,7 @@ spec:
         - podSelector:
             matchLabels:
               app: {{ template "cassandra.name" . }}
-              release: {{ .Release.Name }}      
+              release: {{ .Release.Name }}
     {{- if .Values.metrics.enabled }}
     # Allow prometheus scrapes for metrics
     - ports:

bitnami/cassandra/templates/statefulset.yaml

@@ -85,8 +85,6 @@ spec:
                 # Only node 0 will execute the startup initdb scripts
                 export CASSANDRA_IGNORE_INITDB_SCRIPTS=1
               fi
-              {{- $domain := .Values.cluster.domain }}
-              export CASSANDRA_HOST="${HOSTNAME}.{{ template "cassandra.fullname" . }}-headless.{{ .Release.Namespace }}.svc.{{ $domain }}"
               {{ .Values.entrypoint }} {{ .Values.cmd }}
         image: {{ template "cassandra.image" . }}
         imagePullPolicy: {{ .Values.image.pullPolicy | quote }}
@@ -94,9 +92,10 @@ spec:
         env:
         - name: CASSANDRA_CLUSTER_NAME
           value: {{ .Values.cluster.name }}
-{{- $global := . }}
-{{- $replicas := .Values.cluster.seedCount | int }}
         - name: CASSANDRA_SEEDS
+          {{- $global := . }}
+          {{- $replicas := .Values.cluster.seedCount | int }}
+          {{- $domain := .Values.cluster.domain }}
           value: "{{- range $i, $e := until $replicas }}{{ template "cassandra.fullname" $global }}-{{ $i }}.{{ template "cassandra.fullname" $global }}-headless.{{ $global.Release.Namespace }}.svc.{{ $domain }}{{- if (lt ( add1 $i ) $replicas ) }},{{- end }}{{- end }}"
         - name: CASSANDRA_PASSWORD
           valueFrom:

bitnami/cassandra/values-production.yaml

@@ -214,6 +214,12 @@ affinity: {}
 ##
 tolerations: []
 
+##
+## Container entrypoint and cmd (useful for using different images)
+##
+entrypoint: "/app-entrypoint.sh"
+cmd: "/run.sh"
+
 ## Network policies
 ## Ref: https://kubernetes.io/docs/concepts/services-networking/network-policies/
 ##

bitnami/cassandra/values.yaml

@@ -214,6 +214,9 @@ affinity: {}
 ##
 tolerations: []
 
+##
+## Container entrypoint and cmd (useful for using different images)
+##
 entrypoint: "/app-entrypoint.sh"
 cmd: "/run.sh"