k8s服务StatefulSet部署模板

java 服务StatefulSet部署模板

vim templates-test.yaml

apiVersion: apps/v1
kind: StatefulSet
metadata:
  labels:
    app: ${app_labels}
  name: ${app_name}
  namespace: ${app_namespace}
spec:
  replicas: ${app_replicas_count}
  selector:
    matchLabels:
      app: ${app_labels}
  template:
      labels:
        app: ${app_labels}
    spec:
      containers:
        - env:
            - name: JAVA_OPTS
              value: ${java_opts}
          image: ${app_docker_image}
          imagePullPolicy: Always
          livenessProbe:
            failureThreshold: 5
            httpGet:
              path: /actuator/health
              port: ${app_port}
              scheme: HTTP
            initialDelaySeconds: 120
            periodSeconds: 10
            successThreshold: 1
            timeoutSeconds: 5
          name: ${app_name}
          ports:
            - containerPort: ${app_port}
              name: http
              protocol: TCP
          readinessProbe:
            failureThreshold: 5
            httpGet:
              path: /actuator/health
              port: ${app_port}
              scheme: HTTP
            initialDelaySeconds: 120
            periodSeconds: 60
            successThreshold: 1
            timeoutSeconds: 5
          resources:
            limits:
              cpu: ${app_cpu_limit}
              memory: {app_memory_limit}
          terminationMessagePath: /dev/termination-log
          terminationMessagePolicy: File
      dnsPolicy: ClusterFirst
      imagePullSecrets:
        - name: harbor
      restartPolicy: Always
      schedulerName: default-scheduler
      securityContext: {}
      terminationGracePeriodSeconds: 30
  updateStrategy:
    rollingUpdate:
      partition: 0
    type: RollingUpdate
---
apiVersion: v1
kind: Service
metadata:
  labels:
    app: ${app_labels}
  name: ${app_service_name}
  namespace: ${app_namespace}
spec:
  clusterIP: None
  ports:
    - name: ${app_service_name}
      port: ${app_port}
      protocol: TCP
      targetPort: ${app_port}
  selector:
    app: ${app_labels}
  sessionAffinity: None
  type: ClusterIP
status:
  loadBalancer: {}

涉及到的变量

 ${app_labels}
 ${app_name}
 ${app_namespace}
 ${app_replicas_count}
 ${java_opts}
 ${app_docker_image}
 ${app_port}
 ${app_cpu_limit}
 {app_memory_limit}
${app_service_name}

测试示例

设置环境变量

export app_labels=test-lable
export app_name=test-name
export app_namespace=test-ns
export app_replicas_count=1
export java_opts="-xms=100mi -xms=100mi -xms=100mi"
export app_docker_image=docker.io/library/openjdk:8-jdk-alpine
export app_port=10000
export app_cpu_limit=1
export app_memory_limit=1000mi
export app_service_name=test-svc-name

执行替换

  envsubst \'\${app_name},\${app_namespace},\${app_labels},\${app_replicas_count},\${java_opts}\,\${app_docker_image}\,\${app_port}\,\${app_cpu_limit}\,\${app_memory_limit}\,\${app_service_name}\' < /root/test/templates-test.yaml > /root/test/templates-new.yaml

查看新文件 templates-new.yaml