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最近一直搞docker,老是用exec进入docker容器也很麻烦,今天在网上发现了nsenter进入容器很方便,解放了老是使用命令进入docker容器的麻烦,下面来看看nsenter的安装和使用吧.
系统:centos 6.x(64位)
环境:docker 1.7.1
1.安装nsenter
wget https://www.kernel.org/pub/linux/utils/util-linux/v2.24/util-linux-2.24.tar.gz
tar zxf util-linux-2.24.tar.gz && cd util-linux-2.24
./configure --without-python --disable-all-programs --enable-nsenter --without-ncurses
make nsenter
cp nsenter /usr/local/bin
2.使用nsenter
cat docker-enter
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if [ -e $(dirname "$0")/nsenter ]; then |
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# with boot2docker, nsenter is not in the PATH but it is in the same folder |
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NSENTER=$(dirname "$0")/nsenter |
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echo "Usage: `basename "$0"` CONTAINER [COMMAND [ARG]...]" |
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echo "Enters the Docker CONTAINER and executes the specified COMMAND." |
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echo "If COMMAND is not specified, runs an interactive shell in CONTAINER." |
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PID=$(docker inspect --format "{{.State.Pid}}" "$1") |
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if [ -z "$PID" ]; then |
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OPTS="--target $PID --mount --uts --ipc --net --pid --" |
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# Use su to clear all host environment variables except for TERM, |
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# initialize the environment variables HOME, SHELL, USER, LOGNAME, PATH, |
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# and start a login shell. |
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"$NSENTER" $OPTS su - root |
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# Use env to clear all host environment variables. |
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"$NSENTER" $OPTS env --ignore-environment -- "$@" |
保存后,执行:
docker ps -a #获取docker的container的pid或者name
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
bf51a302046d rocdk890/jenkins-nodejs:v1 "/bin/tini -- /usr/l 5 days ago Up 4 days 0.0.0.0:3000->3000/tcp, 0.0.0.0:8080->8080/tcp, 0.0.0.0:8360->8360/tcp, 50000/tcp jenkins_nodejs
df85f816642c bitnami/mongodb:3.2.5-0 "/entrypoint.sh" 2 weeks ago Up 5 days 0.0.0.0:27017->27017/tcp mongodb
可以看到我这里有2个container运行在,然后使用刚刚docker-enter来进入container:
./docker-enter jenkins_nodejs
使用docker container的name来进入container是不是很方便,好了,有兴趣的朋友可以自己去研究下.
(责任编辑：IT) |
