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Docker
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===
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## 通过Docker快速入门
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1. 删除本地已有的`arthas-demo` docker container（非必要）
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```sh
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$ docker stop arthas-demo || true && docker rm arthas-demo || true
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```
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1. 启动`arthas-demo`
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```sh
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$ docker run --name arthas-demo -it hengyunabc/arthas:latest /bin/sh -c "java -jar /opt/arthas/arthas-demo.jar"
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```
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1. 启动`arthas-boot`来进行诊断
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```sh
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$ docker exec -it arthas-demo /bin/sh -c "java -jar /opt/arthas/arthas-boot.jar"
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* [1]: 9 jar
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[INFO] arthas home: /opt/arthas
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[INFO] Try to attach process 9
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[INFO] Attach process 9 success.
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[INFO] arthas-client connect 127.0.0.1 3658
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,---. ,------. ,--------.,--. ,--. ,---. ,---.
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/ O \ | .--. ''--. .--'| '--' | / O \ ' .-'
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| .-. || '--'.' | | | .--. || .-. |`. `-.
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| | | || |\ \ | | | | | || | | |.-' |
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`--' `--'`--' '--' `--' `--' `--'`--' `--'`-----'
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wiki: https://alibaba.github.io/arthas
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version: 3.0.5
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pid: 9
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time: 2018-12-18 11:30:36
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```
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## 诊断Docker里的Java进程
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```sh
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docker exec -it ${containerId} /bin/bash -c "wget https://alibaba.github.io/arthas/arthas-boot.jar && java -jar arthas-boot.jar"
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```
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## 诊断k8s里容器里的Java进程
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```sh
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kubectl exec -it ${pod} --container ${containerId} -- /bin/bash -c "wget https://alibaba.github.io/arthas/arthas-boot.jar && java -jar arthas-boot.jar"
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```
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## 把Arthas安装到基础镜像里
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可以很简单把Arthas安装到你的Docker镜像里。
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```
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FROM openjdk:8-jdk-alpine
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# copy arthas
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COPY --from=hengyunabc/arthas:latest /opt/arthas /opt/arthas
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```
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如果想指定版本，可以查看具体的tags：
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[https://hub.docker.com/r/hengyunabc/arthas/tags](https://hub.docker.com/r/hengyunabc/arthas/tags)
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