skywalking 部署使用

1. 结构采用， pod中植入 agent， 传输到 172.16.230.29:11800, es 使用docker部署，版本es7

docker run -d --name elasticsearch   -p 9200:9200 -p 9300:9300 -e "discovery.type=single-node" docker.elastic.co/elasticsearch/elasticsearch:7.5.2

2. 下载 skywaking

wget https://mirrors.tuna.tsinghua.edu.cn/apache/skywalking/7.0.0/apache-skywalking-apm-es7-7.0.0.tar.gz

3. 修改存储，使用 es7

4. 启动

#注意要在es启动后，在启动skywalking
[root@harbor apache-skywalking-apm-bin-es7]# bin/startup.sh

5. 客户端配置，通过 dockerfile 和 comfigmap 使用

[root@harbor jar]# cat Dockerfile
FROM   IMAGE

MAINTAINER fengjian <fengjian@senyint.com.com>
RUN mkdir /data/webserver -p
ADD start.sh /data/webserver/
COPY agent /data/agent

RUN chmod +x /data/webserver/start.sh 
    && sed -i "s/Your_ApplicationName/jenkins/g" /data/agent/config/agent.config

ADD jenkins.jar /data/webserver/
EXPOSE containerport
ENTRYPOINT ["/data/webserver/start.sh"]

[root@harbor jar]# cat start.sh 
#!/bin/sh

# JAVA_HOME
export JAVA_HOME=/data/jdk
# 设置项目代码路径
export _EXECJAVA="$JAVA_HOME/bin/java"
#jar包 名称
JAVANAME=`ls /data/webserver/*jar`

# 启动
$_EXECJAVA ${JAVA_OPT} -jar  $JAVANAME

k8s中部署应用 和  nacos， nacos的yaml为

[root@master1 senyint]# cat nacos-quick-start.yaml 
---
apiVersion: v1
kind: Service
metadata:
  namespace: senyint
  name: nacos
  labels:
    app: nacos
spec:
  type: NodePort
  ports:
    - port: 8848
      name: server
      targetPort: 8848
  selector:
    app: nacos
---
apiVersion: v1
kind: ConfigMap
metadata:
  namespace: senyint
  name: nacos-cm
data:
  mysql.db.name: "nacos_devtest"
  mysql.port: "3306"
  mysql.user: "nacos"
  mysql.password: "nacos"
---
apiVersion: apps/v1
kind: StatefulSet
metadata:
  namespace: senyint
  name: nacos
spec:
  serviceName: nacos
  replicas: 3
  template:
    metadata:
      labels:
        app: nacos
      annotations:
        pod.alpha.kubernetes.io/initialized: "true"
    spec:
      initContainers:
        - name: sidecar
          image: 172.16.230.29/senyint/skywalking-agent:202004101053
          imagePullPolicy: Always
          command: ["sh", "-c", "cp -r /data/agent /sidecar"]
          volumeMounts:
            - name: sidecar
              mountPath: /sidecar
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            - labelSelector:
                matchExpressions:
                  - key: "app"
                    operator: In
                    values:
                      - nacos
              topologyKey: "kubernetes.io/hostname"
      containers:
        - name: k8snacos
          imagePullPolicy: Always
          image: nacos/nacos-server:latest
          resources:
            requests:
              memory: "2Gi"
              cpu: "500m"
          ports:
            - containerPort: 8848
              name: client
          volumeMounts:
            - name: sidecar
              mountPath: /sidecar
          env:
            - name: JAVA_OPT
              value: -javaagent:/sidecar/agent/skywalking-agent.jar
            - name: NACOS_REPLICAS
              value: "3"
            - name: MYSQL_SERVICE_DB_NAME
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.db.name
            - name: MYSQL_SERVICE_PORT
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.port
            - name: MYSQL_SERVICE_USER
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.user
            - name: MYSQL_SERVICE_PASSWORD
              valueFrom:
                configMapKeyRef:
                  name: nacos-cm
                  key: mysql.password
            - name: NACOS_SERVER_PORT
              value: "8848"
            - name: PREFER_HOST_MODE
              value: "hostname"
            - name: NACOS_SERVERS
              value: "nacos-0.nacos.senyint.svc.cluster.local.:8848 nacos-1.nacos.senyint.svc.cluster.local.:8848 nacos-2.nacos.senyint.svc.cluster.local.:8848"
      volumes:
        - name: sidecar  #共享agent文件夹
          emptyDir: {}
      restartPolicy: Always
  selector:
    matchLabels:
      app: nacos

使用initcontainers  共享磁盘空间， 172.16.230.29/senyint/skywalking-agent:202004101053， 启动ssh，agent 在 /data目录中，

k8s pod中，通过引用 env 环境变量 JAVA_OPT 引入

环境变量配置：

参考

https://skywalking.apache.org/downloads/

https://github.com/evanxuhe/skywalking-kubernetes/tree/master/6.1.0/apm-springcloud-demo

https://github.com/evanxuhe/skywalking-kubernetes/blob/master/6.1.0/apm-springcloud-demo/kdep-apm-eureka.yml