通过yaml文件实现微服务加入skywalking agent，能够容易管理skywalking agent版本，主要内容如下：
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| spec:
volumes:
- name: skywalking-agent
emptyDir: { }
initContainers:
- name: agent-container
image: apache/skywalking-java-agent:8.7.0-alpine
volumeMounts:
- name: skywalking-agent
mountPath: /agent
command: [ "/bin/sh" ]
args: [ "-c", "cp -R /skywalking/agent /agent/" ]
containers:
- name: java
image: xxxx
volumeMounts:
- name: skywalking-agent
mountPath: /skywalking
env:
- name: JAVA_TOOL_OPTIONS
value: "-javaagent:/skywalking/agent/skywalking-agent.jar"
- name: SW_AGENT_NAME
value: "xxxx"
- name: SW_AGENT_COLLECTOR_BACKEND_SERVICES
value: "xx.xx.xx.xx:11800"
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