configMap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: pub-oa-configmap
  namespace: hunter
data:
  MYSQL_HOST: pub-oa-db-svc
  MYSQL_PORT: 3306

sceret.yaml

apiVersion: v1
kind: Secret
metadata:
  name: pub-oa-secret
  namespace: hunter
type: Opaque
data:
  MYSQL_USER: cm9vdA== # 注意加-n參數(shù)，echo -n root|base64
  MYSQL_PASSWORD: aHVudGVy

?service-mysql.yaml

apiVersion: apps/v1
kind: Service
metadata:
  name: pub-oa-db-svc
  namespace: hunter
spec:
  ports:
    - port: 3306
      protocal: TCP
      targetPort: 3306
  selector:
    app: pub-oa-db
  type: ClusterIP

?service-web.yaml

# 查看pod節(jié)點(diǎn)，并顯示labels
# kubectl -n hunter get pods --show-labels
# 查看service
# kubectl -n hunter get svc
# 查看指定service
# kubectl -n hunter get svc pub-oa-web
# 查看某個service詳情
# kubectl -n hunter describe svc pub-oa-web
# 查看pub-oa-web的 endpoints情況
# kubectl -n hunter get endpoints pub-oa-web

apiVersion: apps/v1
kind: Service
metadata:
  name: pub-oa-web-svc
  namespace: hunter
spec:
  ports:
    - port: 8080
      protocal: TCP
      targetPort: 8080
  selector:
    app: pub-oa-web
  type: ClusterIP

mysql-deploy.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: pub-oa-db
  namespace: hunter
spec:
  replicas: 1 # 指定pod的副本數(shù)量
  selector:
    matchLabels:
      app: pub-oa-db
  template:
    metadata:
      labels: # 給pod打label
        app: pub-oa-db
    spec:
      volumes:
        - name: mysql
          hostPath:
            path: /opt/mysql/data
      nodeSelector: # 使用節(jié)點(diǎn)選擇器將pod調(diào)度到指定的label節(jié)點(diǎn)
        component: prod-k8s-node1 # kubectl label node prod-k8s-node1 component=prod-k8s-node1
      containers:
        - name: pub-oa-db
          image: rigistry.cn-shanghai.aliyuncs.com/pub-oa-db:v1
          imagePullPolicy: IfNotPresent # 鏡像拉去策略，此外還有Always, Never
          ports:
            - containerPort: 3306
          env:
            - name: MYSQL_USER
              valueFrom:
                secretKeyRef:
                  name: pub-oa-secret
                  key: MYSQL_USER
            - name: MYSQL_ROOT_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: pub-oa-secret
                  key: MYSQL_PASSWORD
          resources: # 容器資源限制
            requests:
              memory: 100Mi # 當(dāng)pod內(nèi)存超過100Mi時(shí)，會報(bào)OOM
              cpu: 50m # 當(dāng)cpu超過limit限制時(shí)，不會被kill，但是會限制不超過limit值，1 CPU = 1000 millicpu（1 core = 1000m（毫核）），cpu資源是按 “時(shí)間片”的方式來分配的
            limits:
              memory: 500Mi
              cpu: 100m
          volumeMounts:
            - name: mysql
              mountPath: /var/lib/mysql

web-deploy.yaml

# overView:
# 1. 添加pod驅(qū)逐策略，在某些場景下如節(jié)點(diǎn) NotReady，或則資源不足時(shí)，把pod驅(qū)逐至其他節(jié)點(diǎn)上
# 2. 添加pod更新策略

apiVersion: apps/v1
kind: Deployment
metadata:
  name: pub-oa-web
  namespace: hunter
spec:
  replicas: 1 # 指定pod的副本數(shù)量, 擴(kuò)容web服務(wù)，kubectl scale deploy web --replicas=2
  selector:
    matchLabels: # 指定pod選擇器
      app: pub-oa-web
  template:
    metadata:
      labels: # 給pod打label
        app: pub-oa-web
    spec:
      nodeSelector: # 使用節(jié)點(diǎn)選擇器將pod調(diào)度到指定的label節(jié)點(diǎn)
        component: prod-k8s-node1 # kubectl label node prod-k8s-node1 component=prod-k8s-node1
      containers:
        - name: pub-oa-web
          image: rigistry.cn-shanghai.aliyuncs.com/pub-oa-app:v1
          imagePullPolicy: IfNotPresent # 鏡像拉去策略，此外還有Always, Never
          ports:
            - containerPort: 8080
          env:
            - name: MYSQL_HOST
              valueFrom:
                configMapKeyRef:
                  name: pub-oa-configmap
                  key: MYSQL_HOST
            - name: MYSQL_PORT
              valueFrom:
                configMapKeyRef:
                  name: pub-oa-configmap
                  key: MYSQL_PORT
            - name: MYSQL_USER
              valueFrom:
                secretKeyRef:
                  name: pub-oa-secret
                  key: MYSQL_USER
            - name: MYSQL_PASSWORD
              valueFrom:
                secretKeyRef:
                  name: pub-oa-secret
                  key: MYSQL_PASSWORD
          livenessProbe: # 存活性探測
            httpGet: # 此外還有 exec，tcpSocket類型
              path: /code-library/listCodeLibrary
              port: 8080
              scheme: HTTP
            initialDelaySeconds: 10 # 容器啟動后，第一次執(zhí)行探測時(shí)需要等待多少秒
            periodSeconds: 10 # 執(zhí)行探測的頻率
            timeoutSeconds: 2 # 探測超時(shí)時(shí)間
          readinessProbe: # 可用性探測
            httpGet: # 此外還有 exec，tcpSocket類型
              path: /code-library/listCodeLibrary
              port: 8080
              scheme: HTTP
            initialDelaySeconds: 10 # 容器啟動后，第一次執(zhí)行探測時(shí)需要等待多少秒
            periodSeconds: 10 # 執(zhí)行探測的頻率
            timeoutSeconds: 2 # 探測超時(shí)時(shí)間
          resources: # 容器資源限制
            requests:
              memory: 100Mi # 當(dāng)pod內(nèi)存超過100Mi時(shí)，會報(bào)OOM
              cpu: 50m # 當(dāng)cpu超過limit限制時(shí)，不會被kill，但是會限制不超過limit值，1 CPU = 1000 millicpu（1 core = 1000m（毫核）），cpu資源是按 “時(shí)間片”的方式來分配的
            limits:
              memory: 500Mi
              cpu: 100m
          volumeMounts:
            - name: mysql
              mountPath: /var/lib/mysql

web-endpoint.yaml

# 為pub-oa-web做節(jié)點(diǎn)負(fù)載均衡
apiVersion: apps/v1
kind: Service
metadata:
  name: pub-oa-web-np
  namespace: hunter
spec:
  ports:
    - port: 8080
      protocal: TCP
      targetPort: 8080
  selector:
    app: pub-oa-web
  type: NodePort

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