进入docker容器之nsenter脚本

4533

docker-enter脚本内容如下：

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

root@zxl-node4:~# cat docker-enter #!/bin/sh 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 if [ -z "$1" ]; then     echo "Usage: `basename "$0"` CONTAINER [COMMAND [ARG]...]"     echo ""     echo "Enters the Docker CONTAINER and executes the specified COMMAND."     echo "If COMMAND is not specified, runs an interactive shell in CONTAINER." else     PID=$(docker inspect --format "{{.State.Pid}}" "$1")     if [ -z "$PID" ]; then         exit 1     fi     shift     OPTS="--target $PID --mount --uts --ipc --net --pid --"     if [ -z "$1" ]; then         # No command given.         # Use su to clear all host environment variables except for TERM,         # initialize the environment variables HOME, SHELL, USER, LOGNAME, PATH,         # and start a login shell.         "$NSENTER" $OPTS su - root     else        # Use env to clear all host environment variables.        "$NSENTER" $OPTS env --ignore-environment -- "$@"     fi fi

赋予docker-enter执行权限

1 2 3 4 5 6 7 8 9 10 11

root@zxl-node4:~# chmod +x docker-enter 使用docker-enter进入容器，实例如下： 查看一下运行的容器 root@zxl-node4:~# docker ps -a CONTAINER ID        IMAGE                       COMMAND             CREATED             STATUS              PORTS               NAMES 7237c3c12e68        jdeathe/centos-ssh:latest   "/bin/bash"         5 hours ago         Up 5 hours          22/tcp              node5                571c7712daec        jdeathe/centos-ssh:latest   "/bin/bash"         5 hours ago         Up 5 hours          22/tcp              node4                0d935fcad74b        jdeathe/centos-ssh:latest   "/bin/bash"         5 hours ago         Up 5 hours          22/tcp              node2                c1e5cca51f2e        jdeathe/centos-ssh:latest   "/bin/bash"         23 hours ago        Up 23 hours         22/tcp              mysql

使用docker-enter进入容器node4

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17

root@zxl-node4:~# ./docker-enter node4 [iyunv@571c7712daec ~]# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00     inet 127.0.0.1/8 scope host lo        valid_lft forever preferred_lft forever     inet6 ::1/128 scope host        valid_lft forever preferred_lft forever 28: eth0: <BROADCAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP     link/ether 02:42:ac:11:00:0d brd ff:ff:ff:ff:ff:ff     inet 172.17.0.13/16 scope global eth0        valid_lft forever preferred_lft forever     inet6 fe80::42:acff:fe11:d/64 scope link        valid_lft forever preferred_lft forever [iyunv@571c7712daec ~]# hostname 571c7712daec [iyunv@571c7712daec ~]#

以上就是使用docker-enter进入容器！！！