在Docker容器中使用Arthas的详细步骤

#!/bin/bash
#
# author: dijia478
# date: 2020-8-20 18:14:38
# desc: 本脚本需要放到arthas的目录中，连同整个目录一起复制到docker容器中去。主要用途为在容器中切换目标服务的用户，并启动arthas

echo "开始查询目标服务的进程id和用户..."
PID=`ps -eo pid,user=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa -o args | grep java | grep -v grep | awk '{print $1}'`
echo "目标服务的进程id为${PID}"
USER=`ps -eo pid,user=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa -o args | grep java | grep -v grep | awk '{print $2}'`
echo "目标服务的用户为${USER}"

if [[ ! -d "/home/${USER}" ]]
then
  mkdir -p /home/${USER}
  echo "创建目录/home/${USER}"
fi
chmod 777 /home/${USER}

echo "开始切换用户并启动arthas..."
# 下面的arthas路径需要修改，并且要和startArthas.sh脚本中保持一致
ARTHAS_PATH="/opt/arthas"
su ${USER} -c "java -jar ${ARTHAS_PATH}/arthas-client.jar 127.0.0.1 3658 -c 'stop'"
su ${USER} -c "java -jar ${ARTHAS_PATH}/arthas-boot.jar ${PID}"

#! /bin/bash
#
# author: dijia478
# date: 2020-9-18 10:36:27
# desc: 本脚本主要用途为启动arthas诊断工具来诊断某个docker中java服务

if [[ ${1} == '' ]]
then
  echo "请选择一个服务："
  sudo docker ps | awk 'NR>1 {print $2}'
  exit 0
fi

echo "开始寻找服务${1}的容器..."
DOCKER_LIST=`sudo docker ps | awk 'NR>1 {print $2}'`
FLAG=0
for i in ${DOCKER_LIST[@]}
do
  if [[ ${i} == ${1} ]]
  then
    FLAG=1
    break
  fi
done

if [[ ${FLAG} == 0 ]]
then
  DOCKER_NAME=`sudo docker ps | awk 'NR>1 {print $2}' | grep ${1}`
  if [[ ${DOCKER_NAME} == '' ]]
  then
    echo "未找到该服务的容器，请重新选择服务："
    sudo docker ps | awk 'NR>1 {print $2}'
  else
    echo "请输入服务的完整名称："
    sudo docker ps | awk 'NR>1 {print $2}' | grep ${1}
  fi

else
  ID=`sudo docker ps --filter ancestor=${1} | awk '{print $1}' | sed -n '2p'`
  echo "找到容器${ID}"

  echo "开始复制arthas到容器中..."
  # 下面的arthas路径需要修改，并且要和arthasDocker.sh脚本中保持一致
  ARTHAS_PATH="/opt/arthas"
  sudo docker exec -it ${ID} /bin/bash -c "rm -rf ${ARTHAS_PATH}"
  sudo docker cp ${ARTHAS_PATH} ${ID}:${ARTHAS_PATH}
  echo "复制完成"

  echo "即将进入容器中..."
  sudo docker exec -it ${ID} /bin/bash -c "bash ${ARTHAS_PATH}/arthasDocker.sh"
fi