🌈部署 Keycloak

开始部署 Keycloak，涉及到的核心的环境变量如下表所示：

环境变量	取值	说明
KC_HOSTNAME	test.keycloak.org	访问 Keycloak 时的域名
KC_HTTP_PORT	8080	HTTP 端口
KC_HTTPS_PORT	8443	HTTPS 端口
KC_HTTPS_CERTIFICATE_FILE	/mnt/certificates/tls.crt	生产环境需通过 HTTPS 访问，这里是之前部署的 SSL 证书
KC_HTTPS_CERTIFICATE_KEY_FILE	/mnt/certificates/tls.key	生产环境需通过 HTTPS 访问，这里是之前部署的 SSL 证书
KC_DB	mysql	数据库类型，这里用 mysql
KC_DB_URL	jdbc:mysql://mysql-db-service.mysql:3306/keycloak?characterEncoding=UTF-8	数据库连接地址，这里通过之前部署的 mysql 的 Service 进行访问
KC_DB_USERNAME	root	mysql账号
KC_DB_PASSWORD	testpassword	mysql密码
KC_HEALTH_ENABLED	true	开启健康检查
KC_METRICS_ENABLED	true	开启监控指标
KC_CACHE	ispn
KC_CACHE_STACK	kubernetes
KC_PROXY	passthrough
KEYCLOAK_ADMIN	admin	初始admin账号
KEYCLOAK_ADMIN_PASSWORD	changeme	初始admin密码
KC_TRUSTSTORE_PATHS	/var/run/secrets/kubernetes.io/serviceaccount/ca.crt	用于访问 k8s 集群

部署用的 YAML 如下：

apiVersion: apps/v1
kind: StatefulSet
metadata:
  labels:
    app: keycloak
  name: keycloak
  namespace: keycloak
spec:
  podManagementPolicy: OrderedReady
  replicas: 3
  selector:
    matchLabels:
      app: keycloak
  serviceName: ""
  template:
    metadata:
      labels:
        app: keycloak
    spec:
      containers:
      - args:
        - -Djgroups.dns.query=keycloak-discovery.keycloak
        - --verbose
        - start
        env:
        - name: KC_HOSTNAME
          value: test.keycloak.org
        - name: KC_FEATURES
          value: multi-site
        - name: KC_TRANSACTION_XA_ENABLED
          value: "false"
        - name: KC_HTTP_PORT
          value: "8080"
        - name: KC_HTTPS_PORT
          value: "8443"
        - name: KC_HTTPS_CERTIFICATE_FILE
          value: /mnt/certificates/tls.crt
        - name: KC_HTTPS_CERTIFICATE_KEY_FILE
          value: /mnt/certificates/tls.key
        - name: KC_DB
          value: mysql
        - name: KC_DB_USERNAME
          valueFrom:
            secretKeyRef:
              key: username
              name: keycloak-db-secret
        - name: KC_DB_PASSWORD
          valueFrom:
            secretKeyRef:
              key: password
              name: keycloak-db-secret
        - name: KC_DB_URL
          value: jdbc:mysql://mysql-db-service.mysql:3306/keycloak?characterEncoding=UTF-8
        - name: KC_DB_POOL_INITIAL_SIZE
          value: "30"
        - name: KC_DB_POOL_MIN_SIZE
          value: "30"
        - name: KC_DB_POOL_MAX_SIZE
          value: "30"
        - name: KC_HEALTH_ENABLED
          value: "true"
        - name: KC_CACHE
          value: ispn
        - name: KC_CACHE_STACK
          value: kubernetes
        - name: KC_PROXY
          value: passthrough
        - name: KC_HTTP_MAX_QUEUED_REQUESTS
          value: "1000"
        - name: KC_LOG_CONSOLE_OUTPUT
          value: json
        - name: KC_METRICS_ENABLED
          value: "true"
        - name: KC_HTTP_POOL_MAX_THREADS
          value: "66"
        - name: KEYCLOAK_ADMIN
          value: "admin"
        - name: KEYCLOAK_ADMIN_PASSWORD
          value: "changeme"
        - name: KC_TRUSTSTORE_PATHS
          value: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
        image: quay.io/keycloak/keycloak:23.0.7
        imagePullPolicy: Always
        livenessProbe:
          failureThreshold: 3
          httpGet:
            path: /health/live
            port: 8443
            scheme: HTTPS
          periodSeconds: 10
          successThreshold: 1
          timeoutSeconds: 1
        name: keycloak
        ports:
        - containerPort: 8443
          name: https
          protocol: TCP
        - containerPort: 8080
          name: http
          protocol: TCP
        readinessProbe:
          failureThreshold: 3
          httpGet:
            path: /health/ready
            port: 8443
            scheme: HTTPS
          periodSeconds: 10
          successThreshold: 1
          timeoutSeconds: 1
        resources:
          limits:
            cpu: "6"
            memory: 2250M
          requests:
            cpu: "2"
            memory: 1250M
        startupProbe:
          failureThreshold: 600
          httpGet:
            path: /health/started
            port: 8443
            scheme: HTTPS
          periodSeconds: 1
          successThreshold: 1
          timeoutSeconds: 1
        terminationMessagePath: /dev/termination-log
        terminationMessagePolicy: File
        volumeMounts:
        - mountPath: /mnt/certificates
          name: keycloak-tls-certificates
      restartPolicy: Always
      securityContext: {}
      terminationGracePeriodSeconds: 30
      volumes:
      - name: keycloak-tls-certificates
        secret:
          defaultMode: 420
          optional: false
          secretName: keycloak-tls-secret
  updateStrategy:
    rollingUpdate:
      partition: 0
    type: RollingUpdate

至此，K8S 中的资源视图如下：

资源视图