skywalking 组件关系及部署

一，组件关系

1，skywalking由三个部分组成

1, skywalking-oap      从agent或es等数据源获取数据
2, skywalking-ui       从skywalking-oap获取数据，并展示到web页面
3, skywalking-agent    从微服务获取数据并写入到配置的数据源中，如es，nacos等

2，配置关系

1, skywalking-oap 有两个端口暴露
2, 11800 ： grpc协议  用于agent上传数据
3, 12800：  rset协议  用于与skywalking-ui通信，skywalking-ui配置SW_OAP_ADDRESS时 要注意填写12800端口

二，部署skywalking

1，部署skywalking-oap

1.1创建configmap

点击查看代码

apiVersion: v1
kind: ConfigMap
metadata:
  name: skywalking-cm
data:
  CLUSTER: 'nacos'
  CLUSTER_NACOS_HOST_PORT: 'nacos-headless:8848'
  STORAGE: 'elasticsearch7'
  STORAGE_ES_CLUSTER_NODES: 'IP:PORT'
  ES_USER: '用户名'
  ES_PASSWORD: '密码'
  CORE_GRPC_PORT: '11800'
  CORE_REST_PORT: '12800'

1.2部署deployment

点击查看代码

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: skywalking
  name: skywalking
  namespace: default
spec:
  replicas: 2
  selector:
    matchLabels:
      app: skywalking
  template:
    metadata:
      labels:
        app: skywalking
    spec:
      containers:
        - envFrom:
          - prefix: SW_
            configMapRef: 
              name: skywalking-cm                  
          image: apache/skywalking-oap-server:8.5.0-es7
          imagePullPolicy: IfNotPresent         
          name: skywalking
          ports:
            - containerPort: 12800
              name: http
              protocol: TCP
            - containerPort: 11800
              name: grpc
              protocol: TCP
          resources:
            limits:
              cpu: '2'
              memory: 2Gi
            requests:
              cpu: '1'
              memory: 2Gi
          volumeMounts:
            - mountPath: /etc/localtime
              name: volume-localtime
      volumes:
        - hostPath:
            path: /etc/localtime
            type: ''
          name: volume-localtime

1.3部署service

点击查看代码

apiVersion: v1
kind: Service
metadata:
  name: skywalking
  labels:
    app: skywalking
spec:
  type: ClusterIP
  ports:
    - name: http
      port: 12800
      protocol: TCP
      targetPort: 12800
    - name: grpc
      port: 11800
      protocol: TCP
      targetPort: 11800
  selector:
    app: skywalking

2，部署skywalking-ui

2.1 部署deployment

点击查看代码

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: skywalking-ui
  name: skywalking-ui
  namespace: default
spec:
  replicas: 1
  selector:
    matchLabels:
      app: skywalking-ui
  template:
    metadata:
      labels:
        app: skywalking-ui
    spec:
      containers:
        - env:
            - name: SW_OAP_ADDRESS
              value: "skywalking:12800"          
          image: apache/skywalking-ui:8.5.0
          imagePullPolicy: IfNotPresent         
          name: skywalking-ui
          ports:
            - containerPort: 8080
              name: http
              protocol: TCP
          resources:
            limits:
              cpu: '2'
              memory: 1Gi
            requests:
              cpu: '1'
              memory: 1Gi
          volumeMounts:
            - mountPath: /etc/localtime
              name: volume-localtime
      volumes:
        - hostPath:
            path: /etc/localtime
            type: ''
          name: volume-localtime

2.2 部署service

点击查看代码

apiVersion: v1
kind: Service
metadata:
  name: skywalking-ui
  labels:
    app: skywalking-ui
spec:
  type: ClusterIP
  ports:
    - name: http
      port: 8080
      protocol: TCP
      targetPort: 8080
  selector:
    app: skywalking-ui

3，部署agent

部署agent有多种方式，简单介绍两中

1.1 将agent.jar与程序打包在同一镜像中：实现简单

点击查看代码

FROM 基础镜像

ADD skagent /skagent
ADD agent.jar /agent.jar
ENTRYPOINT ["java", "-javaagent:/agent/skywalking-agent.jar", "-jar", "-server", "/app.jar"]

1.2 rancher中 直接将agent.jar复制到系统应用的家目录中，入口命令添加启动即可

agent配置优先级
优先级：探针 > JVM配置 > 系统环境变量 > agent.config
启动命令参考
-javaagent:/path/to/skywalking-agent.jar={config1}={value1},{config2}={value2}
Java -javaagent:../skywalking-agent.jar=agent.service_name=service-name -jar XXX.jar