1、k8s中安装部署 skywalking

skywalking集群情况下需要保证用同一数据源，这里我们存储方式改为es

1.1 部署elasticsearch

docker run -it -d -p 9200:9200 -p 9300:9300 -e ES_JAVA_OPTS="-Xms256m -Xmx256m" -e "discovery.type=single-node"   elasticsearch:7.14.2

1.2 创建skywalking-oap的yaml

apiVersion: apps/v1
kind: Deployment
metadata:name: skywalking-oapnamespace: defaultlabels:app: skywalking-oap
spec:replicas: 1selector:matchLabels:app: skywalking-oaptemplate:metadata:labels:app: skywalking-oapspec:containers:- env:- name: SW_STORAGEvalue: elasticsearch7  ##存储方式- name: SW_STORAGE_ES_CLUSTER_NODESvalue: 10.0.24.5:9200 ##es地址name: skywalking-oapimage: apache/skywalking-oap-server:8.4.0-es7  ##镜像imagePullPolicy: IfNotPresent ##如果存在就不拉去取ports:- containerPort: 11800name: grpc- containerPort: 12800name: rest
---
apiVersion: v1
kind: Service
metadata:name: skywalking-oapnamespace: defaultlabels:service: skywalking-oap
spec:ports:- port: 12800name: rest- port: 11800name: grpcselector:app: skywalking-oap

1.3 创建skywalking-ui的yaml

apiVersion: apps/v1
kind: Deployment
metadata:name: skywalking-uinamespace: defaultlabels:app: skywalking-ui
spec:replicas: 1selector:matchLabels:app: skywalking-uitemplate:metadata:labels:app: skywalking-uispec:containers:- name: skywalking-uiimage: apache/skywalking-ui:8.4.0ports:- containerPort: 8080name: pageenv:- name: SW_OAP_ADDRESSvalue: skywalking-oap:12800 ##skywalking-oap监听端口
---
apiVersion: v1
kind: Service
metadata:name: skywalking-uinamespace: defaultlabels:service: skywalking-ui
spec:ports:- port: 8080name: pagenodePort: 30200type: NodePortselector:app: skywalking-ui

1.3 k8s中部署 skywalking-oap.yaml、skywalking-ui.yaml

kubectl create -f skywalking-oap.yaml
kubectl create -f skywalking-ui.yaml

1.4 查看skywalking-ui

2、部署项目使用skywalking进行链路追踪

2.1 下载 skywalking-agent

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

2.2 idea 中使用skywalking-agent

2.2.1 创建项目server-order 并创建web控制层

@RestController
public class OrderController {@GetMapping("/getuuid")public String getuuid(){String uuid = UUID.randomUUID().toString().replace("-", "");return uuid;}
}

2.2.2 创建项目web-monitor 并创建feign和monitor的控制层

@FeignClient(value = "server-order")
@Component
public interface OrderService {@GetMapping("/getuuid")public String getuuid();}

@RestController
public class MonitorController {@Autowiredprivate OrderService orderService;@GetMapping("send")public String send(){String getuuid = orderService.getuuid();return getuuid;}
}

2.2.3 增加环境变量

-javaagent:D:\\opts\\apache-skywalking-java-agent-8.8.0\\skywalking-agent\\skywalking-agent.jar
-Dskywalking.collector.backend_service=ip地址:端口
-Dskywalking.agent.service_name=服务名称

2.2.3 查看skywalking-ui链路

2.3 k8s 部署项目增加skywalking链路追踪

2.3.1 构建镜像

FROM java:8
WORKDIR /project
ENV JAVA_OPTS=""
ENV SKYWALKING_OPTS=""
CPOY skywalking-agent.jar  skywalking-agent.jar
COPY web-monitor.jar web-monitor.jar
ENTRYPOINT ["sh","-c","java -jar ${JAVA_OPTS} web-monitor.jar ${SKYWALKING_OPTS} "]

2.3.2 创建k8s无状态服务

apiVersion: extensions/v1beta1 #版本
kind: Deployment  #资源类型
metadata:labels:workload.user.cattle.io/workloadselector: deployment-cloud-web-monitor  #标签，k8s对于资源控制主要是根据labels和selector进行的name: web-monitor  #资源名称namespace: deafult #所属命名空间
spec:progressDeadlineSeconds: 600  replicas: 1  #一个podrevisionHistoryLimit: 10selector:matchLabels:workload.user.cattle.io/workloadselector: deployment-cloud-web-monitorstrategy:rollingUpdate:maxSurge: 1maxUnavailable: 0type: RollingUpdate #发布策略template:    #创建模板metadata:labels:workload.user.cattle.io/workloadselector: deployment-cloud-web-monitorspec:containers:- env:- name: JAVA_OPTSvalue: -Xmx3550M -Xms3550M -Xmn2G -Xss256k- name: SKYWALKING_OPTSvalue: -javaagent:./skywalking-agent.jar -Dskywalking.agent.service_name=web-monitor -Dskywalking.collector.backend_service=skywalking-oap:11800image: 192.1.1.1/project/web-monitor:stable  #镜像imagePullPolicy: Always  #镜像拉取策略name: web-monitor   #容器名称ports:- containerPort: 8513  #暴露端口name: 8513tcp02protocol: TCPresources:limits:memory: 4Gistdin: trueterminationMessagePath: /dev/termination-logterminationMessagePolicy: Filetty: truevolumeMounts:- mountPath: /log  #容器内部挂载位置name: vol1dnsPolicy: ClusterFirstrestartPolicy: Always  #重启策略schedulerName: default-schedulersecurityContext: {}terminationGracePeriodSeconds: 30volumes:- name: vol1persistentVolumeClaim: #挂载的pvcclaimName: log-pvc

2.3.3 注意点

在上边的镜像中 将skywalking-agent.jar 拷贝到镜像里，这一步可以使用pv挂载，另外也可以将skywalking-agent用initc来做链路追踪