MacDocker/K8s 部署 Kong Konga Post

0x00 目的

在MacDocker 环境部署kong, konga,postgres, 其中 postgres使用外部存储.

0x01 部署带存储的Postgres

# 在Mac Docker环境, 默认已经有一个本机存储的StorageClass
# 直接部署下面的PVC, 可以动态绑定.
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: kong-db-pvc
  namespace: prod
spec:
  accessModes:
    - ReadWriteOnce
  volumeMode: Filesystem
  resources:
    requests:
      storage: 1Gi
  storageClassName: hostpath
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: postgres
  namespace: prod
  labels:
    app: postgres
spec:
  replicas: 1
  template:
    metadata:
      name: postgres
      labels:
        app: postgres
    spec:
      containers:
        - name: postgres
          image: postgres:9.6
          imagePullPolicy: IfNotPresent
          env:
            - name: POSTGRES_USER
              value: kong
            - name: POSTGRES_DB
              value: kong
            - name: POSTGRES_PASSWORD
              value: kong
            - name: PGDATA
              value: /var/lib/postgresql/data
            - name: POSTGRES_INITDB_WALDIR
              value: /var/lib/postgresql/dblogs/logs
          volumeMounts:
            - name: data
              mountPath: /var/lib/postgresql
      volumes:
        - name: data
          persistentVolumeClaim:
            claimName: kong-db-pvc
      restartPolicy: Always
  selector:
    matchLabels:
      app: postgres
---
apiVersion: v1
kind: Service
metadata:
  name: postgres
  namespace: prod
spec:
  selector:
    app: postgres
  ports:
    - port: 5432
      targetPort: 5432
  type: ClusterIP

0x02 在kong pod中初始化 postgres 数据库

部署一个无DB的Kong,进去初始化数据库

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: kong
  namespace: prod
  labels:
    app: kong
spec:
  replicas: 1
  template:
    metadata:
      name: kong
      labels:
        app: kong
    spec:
      containers:
        - name: kong
          image: kong:2.5.1-alpine
          imagePullPolicy: IfNotPresent
          env:
            - name: KONG_DATABASE
              value: off
      restartPolicy: Always
  selector:
    matchLabels:
      app: kong

开始初始化:

# docker exec -it kong-xxx  -- /bin/bash
bash-5.1$ export KONG_DATABASE=postgres
bash-5.1$ export KONG_PG_HOST=10.1.6.3
bash-5.1$ export KONG_PG_PASSWORD=kong
bash-5.1$ export KONG_PASSWORD=kong
bash-5.1$ which kong
/usr/local/bin/kong
bash-5.1$ kong migrations bootstrap

0x03 部署带数据库的 Kong

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: kong
  namespace: prod
  labels:
    app: kong
spec:
  replicas: 1
  template:
    metadata:
      name: kong
      labels:
        app: kong
    spec:
      containers:
        - name: kong
          image: kong:2.5.1-alpine
          imagePullPolicy: IfNotPresent
          env:
            - name: KONG_DATABASE
              value: postgres
            - name: KONG_PG_HOST
              value: postgres
            - name: KONG_PG_USER
              value: kong
            - name: KONG_PG_PASSWORD
              value: kong
            - name: KONG_PROXY_ACCESS_LOG
              value: /dev/stdout
            - name: KONG_ADMIN_ACCESS_LOG
              value: /dev/stdout
            - name: KONG_PROXY_ERROR_LOG
              value: /dev/stderr
            - name: KONG_ADMIN_ERROR_LOG
              value: /dev/stderr
            - name: KONG_ADMIN_LISTEN
              value: '0.0.0.0:8001, 0.0.0.0:8444 ssl'
          resources:
            requests:
              cpu: 250m
              memory: 750Mi
            limits:
              cpu: 250m
              memory: 750Mi
      restartPolicy: Always
  selector:
    matchLabels:
      app: kong
---
apiVersion: v1
kind: Service
metadata:
  name: kong
  namespace: prod
spec:
  selector:
    app: kong
  ports:
    - name: proxy
      port: 8000
      targetPort: 8000
    - name: admin
      port: 8001
      targetPort: 8001
  type: ClusterIP

0x04 部署Konga

apiVersion: apps/v1
kind: Deployment
metadata:
  name: konga
  labels:
    app: konga
spec:
  replicas: 1
  template:
    metadata:
      name: konga
      labels:
        app: konga
    spec:
      containers:
        - name: konga
          image: pantsel/konga
          imagePullPolicy: IfNotPresent
          env:
            - name: NODE_ENV
              value: production
            - name: TOKEN_SECRET
              value: somerandomstring
            - name: DB_ADAPTER
              value: postgres
            - name: DB_HOST
              value: postgres
            - name: DB_USER
              value: kong
            - name: DB_PASSWORD
              value: kong
            - name: DB_PG_SCHEMA
              value: konga
      restartPolicy: Always
  selector:
    matchLabels:
      app: konga
---
apiVersion: v1
kind: Service
metadata:
  name: konga
  namespace: prod
spec:
  selector:
    app: konga
  ports:
    - port: 1337
      targetPort: 1337
  type: ClusterIP

需要注意的是, konga 和 kong 是独立关系, 需要打开 konga网页后, 手动添加kong的信息:

http://kong:8001

后记: 如果要添加 自定义插件, 上面的 kong 部署方式 就不够用了, 目前感觉需要打自定义镜像了, 以后有空再说吧.

0x05 EKS 上部署排坑

• PVC部署参考另外的 nacos 文章可以解决
• konga 数据库初始化办法 :

先把下面的NODE_ENV 注释掉, 即: 开发者模式, 部署时, 会自动 创建 konga 表结构. 完成后, 可以再使用生产模式.

         - name: NODE_ENV
              value: production

• postgresql 访问

kubectl exec -it postgresqlxxx  -- /bin/bash
psql --username=kong
create datbase konga