如何在 docker 容器中执行命令作为 bash shell 脚本的一部分
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How to execute commands in docker container as part of bash shell script
提问by Patrik Mihal?in
I would like to write a bash script that automates the following:
我想编写一个自动执行以下操作的 bash 脚本：
Get inside running container
进入正在运行的容器
docker exec -it CONTAINER_NAME /bin/bash
Execute some commands:
执行一些命令：
cat /dev/null > /usr/local/tomcat/logs/app.log
exit
The problematic part is when docker execis executed. The new shell is created, but the other commands are not executed.
有问题的部分是何时docker exec执行。创建了新的 shell，但不执行其他命令。
Is there a way to solve it?
有办法解决吗？
回答by anubhava
You can use heredocwith docker execcommand:
你可以用heredoc与docker exec命令：
docker exec -i CONTAINER_NAME bash <<'EOF'
cat /dev/null > /usr/local/tomcat/logs/app.log
exit
EOF
To use variables:
使用变量：
logname='/usr/local/tomcat/logs/app.log'
then use as:
然后用作：
docker exec -i CONTAINER_NAME bash <<EOF
cat /dev/null > "$logname"
exit
EOF
回答by user2915097
You can simply launch
你可以简单地启动
docker exec -it container_id cat /dev/null > /usr/local/tomcat/logs/app.log
docker exec -it container_id cat /dev/null > /usr/local/tomcat/logs/app.log
