openstack-helm/mariadb/templates/mariadb-deployment.yaml

---
apiVersion: v1
kind: Service
metadata:
  name: mariadb
spec:
  ports:
    - name: db
      port: {{ .Values.network.port.mariadb }}
  selector:
    app: mariadb
{{- $root := . -}}
{{ range $k, $v := until (atoi .Values.replicas) }}
---
apiVersion: v1
kind: Service
metadata:
  name: mariadb-{{$v}}
  labels:
    release: {{ $root.Release.Name | quote }}
    chart: "{{ $root.Chart.Name }}-{{ $root.Chart.Version }}"
spec:
  ports:
    - name: db
      port: {{ $root.Values.network.port.mariadb }}
    - name: wsrep
      port: {{ $root.Values.network.port.wsrep }}
  selector:
    app: mariadb
    server-id: "{{$v}}"
---
kind: PersistentVolumeClaim
apiVersion: v1
metadata:
  name: mariadb-{{$v}}
  annotations:
    volume.beta.kubernetes.io/storage-class: "general"  
spec:
  accessModes: [ "ReadWriteOnce" ]
  resources:
    requests:
      storage: {{ $root.Values.volume.size }}  
---
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
  labels:
    app: mariadb
    galera: enabled
    server-id: "{{$v}}"
  name: mariadb-{{$v}}
spec:
  replicas: 1
  template:
    securityContext:
      runAsUser: 0      
    metadata:
      name: mariadb-{{$v}}
      labels:
        app: mariadb
        galera: enabled
        server-id: "{{$v}}"
      annotations:
        pod.beta.kubernetes.io/hostname: mariadb-{{$v}}
        helm.sh/created: {{ $root.Release.Time.Seconds | quote }}
        # alanmeadows: this soft requirement allows single
        # host deployments to spawn several mariadb containers
        # but in a larger environment, would attempt to spread
        # them out
        scheduler.alpha.kubernetes.io/affinity: >
          {
            "podAntiAffinity": {
              "preferredDuringSchedulingIgnoredDuringExecution": [{
                "labelSelector": {
                  "matchExpressions": [{
                    "key": "app",
                    "operator": "In",
                    "values":["mariadb"]
                  }]
                },
              "topologyKey": "kubernetes.io/hostname",
              "weight": 10
              }]
            }
          }        
    spec:
      nodeSelector:
        {{ $root.Values.labels.node_selector_key }}: {{ $root.Values.labels.node_selector_value }}
      containers:
        - name: mariadb-{{$v}}
          image: {{ $root.Values.images.mariadb }}
          imagePullPolicy: Always
          env:
            - name: INTERFACE_NAME
              value: "eth0"
            - name: POD_NAME
              valueFrom:
                fieldRef:
                  fieldPath: metadata.name
            - name: NAMESPACE
              valueFrom:
                fieldRef:
                  fieldPath: metadata.namespace
            - name: COMMAND
              value: "bash /tmp/start.sh"
            - name: DEPENDENCY_CONFIG
              value: "/etc/my.cnf.d/wsrep.cnf"
          ports:
            - containerPort: {{ $root.Values.network.port.mariadb }}
            - containerPort: {{ $root.Values.network.port.wsrep }}
          readinessProbe:
            exec:
              command:
                - python
                - /mariadb-readiness.py
          volumeMounts:
            - name: mycnfd
              mountPath: /etc/my.cnf.d
            - name: startsh
              mountPath: /tmp/start.sh
              subPath: start.sh
            - name: bootstrapdb
              mountPath: /tmp/bootstrap-db.sh
              subPath: bootstrap-db.sh
            - name: peer-finder
              mountPath: /tmp/peer-finder.py
              subPath: peer-finder.py
            - name: charsets
              mountPath: /etc/my.cnf.d/charsets.cnf 
              subPath: charsets.cnf
            - name: engine
              mountPath: /etc/my.cnf.d/engine.cnf
              subPath: engine.cnf
            - name: log
              mountPath: /etc/my.cnf.d/log.cnf 
              subPath: log.cnf
            - name: mycnf
              mountPath: /etc/my.cnf 
              subPath: my.cnf
            - name: networking
              mountPath: /etc/my.cnf.d/networking.cnf  
              subPath: networking.cnf
            - name: pid
              mountPath: /etc/my.cnf.d/pid.cnf
              subPath: pid.cnf
            - name: tuning
              mountPath: /etc/my.cnf.d/tuning.cnf
              subPath: tuning.cnf
            - name: wsrep
              mountPath: /configmaps/wsrep.cnf
            - name: replicas
              mountPath: /tmp/replicas.py
              subPath: replicas.py
            - name: readiness
              mountPath: /mariadb-readiness.py
              subPath: mariadb-readiness.py
            - name: mysql-data
              mountPath: /var/lib/mysql              
      volumes:
        - name: mycnfd
          emptyDir: {}
        - name: startsh
          configMap:
            name: mariadb-startsh
        - name: bootstrapdb
          configMap:
            name: bootstrap-db
        - name: peer-finder
          configMap:
            name: mariadb-peer-finder
        - name: charsets
          configMap:
            name: mariadb-charsets
        - name: engine
          configMap:
            name: mariadb-engine
        - name: log
          configMap:
            name: mariadb-log
        - name: mycnf
          configMap:
            name: mariadb-mycnf
        - name: networking
          configMap:
            name: mariadb-networking
        - name: pid
          configMap:
            name: mariadb-pid
        - name: tuning
          configMap:
            name: mariadb-tuning
        - name: wsrep
          configMap:
            name: mariadb-wsrep
        - name: replicas
          configMap:
            name: mariadb-replicas
        - name: readiness
          configMap:
            name: mariadb-readiness
        - name: mysql-data
          persistentVolumeClaim:
            matchLabels:
              server-id: "{{$v}}"
            claimName: mariadb-{{$v}}
  {{ end }}