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Cassandradb (#40)
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‎charts/cassandra/Chart.yaml‎

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apiVersion: v1
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appVersion: "1.0"
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description: Helm chart for deploying cassandra
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name: cassandra
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version: 0.0.1
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icon: "https://zop.dev/logo.png"
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maintainers:
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- name: ZopDev
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url: zop.dev

‎charts/cassandra/templates/database-config.yaml‎

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{{- range $index, $service := .Values.services }}
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apiVersion: v1
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kind: ConfigMap
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metadata:
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name: {{ $.Release.Name }}-{{ $service.database }}-{{ $service.name }}-cassandra-configmap
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namespace: {{ $.Release.Namespace }}
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data:
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Hosts: {{ $.Release.Name }}-cassandra
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Keyspace: "{{ $service.database }}"
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Port: "9042"
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Username: "{{ $service.name }}-user"
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{{- end }}

‎charts/cassandra/templates/database-pod.yaml‎

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{{- range $index, $service := .Values.services }}
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apiVersion: v1
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kind: Pod
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metadata:
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name: {{ $.Release.Name }}-{{ $service.name }}-cassandra-init
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namespace: {{ $.Release.Namespace }}
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spec:
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containers:
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- name: cassandra-init
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image: {{ $.Values.image }}
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command:
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- sh
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- -c
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- |
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echo "Initializing Cassandra Pod...";
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sleep 60;
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cqlsh {{ $.Release.Name }}-cassandra -u superuser -p $POD_PASSWORD -e "SOURCE '/etc/config/init-schema.cql';"
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env:
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- name: POD_PASSWORD
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valueFrom:
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secretKeyRef:
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name: {{ $.Release.Name }}-cassandra-database-secret
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key: pod_password
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volumeMounts:
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- name: script-volume
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mountPath: /etc/config
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volumes:
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- name: script-volume
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configMap:
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name: {{ $.Release.Name }}-{{ $service.name }}-init-script
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restartPolicy: OnFailure
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{{- end}}

‎charts/cassandra/templates/database-secret.yaml‎

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{{- range $index, $service := .Values.services }}
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apiVersion: v1
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kind: Secret
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metadata:
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name: {{ $.Release.Name }}-{{ $service.database }}-{{ $service.name}}-cassandra-database-secret
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namespace: {{ $.Release.Namespace }}
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type: Opaque
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data:
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pod_password: {{ $service.password | b64enc }}
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{{- end }}

‎charts/cassandra/templates/init-script-config-map.yaml‎

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{{- range $index, $service := .Values.services }}
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apiVersion: v1
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kind: ConfigMap
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metadata:
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name: {{ $.Release.Name }}-{{ $service.name }}-init-script
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namespace: {{ $.Release.Namespace }}
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data:
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init-schema.cql: |
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CREATE KEYSPACE IF NOT EXISTS "{{ $service.database }}"
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WITH replication = {'class': 'SimpleStrategy', 'replication_factor': 1};
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USE "{{ $service.database }}";
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{{- end }}

‎charts/cassandra/templates/secret.yaml‎

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apiVersion: v1
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kind: Secret
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metadata:
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name: {{ $.Release.Name }}-cassandra-database-secret
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namespace: {{ .Release.Namespace }}
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type: Opaque
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data:
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pod_password: {{ .Values.cassandradbRootPassword | b64enc }}

‎charts/cassandra/templates/service.yaml‎

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apiVersion: v1
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kind: Service
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metadata:
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name: {{ .Release.Name }}-cassandra
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labels:
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app: {{ .Release.Name }}-cassandra
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spec:
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type: ClusterIP
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clusterIP: None
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ports:
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- port: 9042
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targetPort: 9042
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selector:
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app: {{ .Release.Name }}-cassandra

‎charts/cassandra/templates/statefulset.yaml‎

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apiVersion: apps/v1
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kind: StatefulSet
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metadata:
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name: {{ .Release.Name }}-cassandra
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namespace: {{ .Release.Namespace }}
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labels:
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app: {{ .Release.Name }}-cassandra
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spec:
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replicas: 1
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serviceName: {{ .Release.Name }}-cassandra
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selector:
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matchLabels:
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app: {{ .Release.Name }}-cassandra
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template:
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metadata:
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labels:
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app: {{ .Release.Name }}-cassandra
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spec:
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containers:
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- name: cassandra
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image: {{ .Values.image }}
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imagePullPolicy: {{ .Values.pullPolicy }}
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ports:
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- containerPort: 9042
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resources:
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requests:
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memory: {{ .Values.resources.requests.memory }}
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cpu: {{ .Values.resources.requests.cpu }}
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limits:
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memory: {{ .Values.resources.limits.memory }}
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cpu: {{ .Values.resources.limits.cpu }}
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env:
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- name: CASSANDRA_CLUSTER_NAME
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value: {{ .Values.config.cluster_name }}
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- name: CASSANDRA_NUM_TOKENS
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value: "{{ .Values.config.num_tokens }}"
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- name: CASSANDRA_SEEDS
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value: "{{ .Release.Name }}-cassandra-0.{{ .Release.Name }}-cassandra.{{ .Release.Namespace }}.svc.cluster.local"
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lifecycle:
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preStop:
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exec:
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command:
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- /bin/sh
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- -c
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- nodetool drain
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livenessProbe:
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exec:
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command:
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- sh
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- -c
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- "nodetool status"
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initialDelaySeconds: 120
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periodSeconds: 20
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timeoutSeconds: 15
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failureThreshold: 3
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readinessProbe:
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exec:
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command:
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- sh
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- -c
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- "nodetool status"
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initialDelaySeconds: 60
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periodSeconds: 20
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timeoutSeconds: 15
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failureThreshold: 3
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volumeMounts:
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- name: {{.Release.Name }}-cassandra-data
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mountPath: /var/lib/cassandra
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volumeClaimTemplates:
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- metadata:
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name: {{.Release.Name }}-cassandra-data
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spec:
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accessModes: ["ReadWriteOnce"]
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resources:
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requests:
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storage: {{ .Values.diskSize }}
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storageClassName: standard

‎charts/cassandra/values.yaml‎

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image: cassandra:4.1.0
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pullPolicy: IfNotPresent
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resources:
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requests:
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memory: "1Gi"
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cpu: "500m"
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limits:
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memory: "2Gi"
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cpu: "1500m"
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diskSize: 10Gi
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config:
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cluster_name: "Cluster"
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num_tokens: 256
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cassandradbRootPassword:
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services:

‎docs/cassandra-v0.0.1.tgz‎

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