使用nsenter工具进入Docker容器

Posted 2020-10-26

vi docker_enter.sh

#!/bin/sh

# 作   者: chengcheng

# 时   间: 2018-03-08

# 文 档名: docker_enter.sh

# 版   本: 1.0.1

# 用   途: 使用nsenter工具进入Docker容器

# 用   法：. docker_enter 容器ID或bash -x docker_enter.sh 容器ID

# 正   文：如以下代码

if [ -e $(dirname "$0")/nsenter ]; then

        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 -- "[email protected]"

        fi

fi