$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
b22cc1880b7a amclain/hgweb:latest "/bin/sh -c 'load-de 3 hours ago Up 3 hours 0.0.0.0:80->80/tcp high_almeida
$ docker attach b22cc1880b7a
root@b22cc1880b7a:/#
2.nsenter
此工具需要从源码安装:
$ cd /tmp; curl https://www.kernel.org/pub/linux/utils/util-linux/v2.24/util-linux-2.24.tar.gz | tar -zxf-; cd util-linux-2.24;
$ ./configure --without-ncurses
$ make nsenter && sudo cp nsenter /usr/local/bin直接用nsenter命令交互很繁琐,然后有人写了配置文件放到bashrc中,就可以方便的使用了。
#docker
export DOCKER_HOST=tcp://localhost:4243
alias docker-pid="sudo docker inspect --format '{{.State.Pid}}'"
alias docker-ip="sudo docker inspect --format '{{ .NetworkSettings.IPAddress }}'"
#the implementation refs from https://github.com/jpetazzo/nsenter/blob/master/docker-enter
function docker-enter() {
if [ -e $(dirname "$0")/nsenter ]; then
# with boot2docker, nsenter is not in the PATH but it is in the same folder
NSENTER=$(dirname "$0")/nsenter
else
NSENTER=nsenter
fi
[ -z "$NSENTER" ] && echo "WARN Cannot find nsenter" && return
if [ -z "$1" ]; then
echo "Usage: `basename "$0"` CONTAINER [COMMAND [ARG]...]"
echo ""
echo "Enters the Docker CONTAINER and executes the specified COMMAND."
echo "If COMMAND is not specified, runs an interactive shell in CONTAINER."
else
PID=$(sudo docker inspect --format "{{.State.Pid}}" "$1")
if [ -z "$PID" ]; then
echo "WARN Cannot find the given container"
return
fi
shift
OPTS="--target $PID --mount --uts --ipc --net --pid"
if [ -z "$1" ]; then
# No command given.
# Use su to clear all host environment variables except for TERM,
# initialize the environment variables HOME, SHELL, USER, LOGNAME, PATH,
# and start a login shell.
#sudo $NSENTER "$OPTS" su - root
sudo $NSENTER --target $PID --mount --uts --ipc --net --pid su - root
else
# Use env to clear all host environment variables.
sudo $NSENTER --target $PID --mount --uts --ipc --net --pid env -i $@
fi
fi
}
其中有两个alias和一个function,使用docker-enter会很容易于容器交互并没有attach中的副作用。如下:
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
beb178cd9335 amclain/hgweb:latest "/bin/sh -c 'load-de 11 seconds ago Up 10 seconds 0.0.0.0:80->80/tcp stoic_yonath
$ docker-enter beb178cd9335
root@beb178cd9335:~# ls
root@beb178cd9335:~# pwd
/root
五、快速启动hg-server
咱也写个alias放子bashrc中,如下:
alias docker-load-hg-server="sudo docker run -idt -p 80:80 -v /home/linc/hg-repos:/var/hg/repos amclain/hgweb"启动它:
$ docker-load-hg-server
[sudo] password for linc:
beb178cd933502970fd12d9a4babecef5475a52d85a207066c665b4a620c5a62