Docker卷的权限问题

但是,我遇到了Docker卷和权限的问题.

我想将应用程序的目录绑定到容器中,以便将任何更改传播到容器而无需重新构建它.

但是,如果我在docker-compose.yml中将其定义为一个卷,我就不能再使用该目录了.我需要app用户拥有该目录及其所有内容,以便Passenger正常工作.

我读到这是不可能chown卷.

你知道任何变通方法吗？

我用于开发环境的图像包含一个如下所示的脚本：

#!/bin/sh

# In usr/local/bin/change-dev-id
# Change the "dev" user UID and GID

# Retrieve new ids to apply
NEWUID=$1
NEWGID=$1
if [ $# -eq 2 ]
then
    NEWGID=$2
elif [ $# -ne 1 ]
then
    echo "Usage: change-dev-id NEWUID [NEWGID]"
    echo "If NEWGID is not provided, its value will be the same as NEWUID"
    exit 1
fi

# Retrieve old ids
OLDUID=`id -u dev`
OLDGID=`id -g dev`

# Change the user ids
usermod -u ${NEWUID} dev
groupmod -g ${NEWGID} dev

# Change the files ownership
find / -not \( -path /proc -prune \) -user ${OLDUID} -exec chown -h ${NEWUID} {} \;
find / -not \( -path /proc -prune \) -group ${OLDGID} -exec chgrp -h ${NEWGID} {} \;

echo "UID and GID changed from ${OLDUID}:${OLDGID} to ${NEWUID}:${NEWGID} for \"dev\""
exit 0

在我的基本映像的Dockerfile中,我添加它并使其可执行：

# Add a script to modify the dev user UID / GID
COPY change-dev-id /usr/local/bin/change-dev-id
RUN chmod +x /usr/local/bin/change-dev-id

然后,我不是更改已安装文件夹的所有者,而是更改容器用户的ID以匹配主机上用户的ID：

# In the Dockerfile of the project's development environment, change the ID of
# the user that must own the files in the volume so that it match the ID of
# the user on the host
RUN change-dev-id 1234

这非常hacky但它​​可以非常方便.我可以在我的机器上拥有项目的文件,而容器中的用户也具有正确的权限.

您可以更新脚本的代码以使用您想要的用户名(我的总是“dev”)或修改它以将用户名作为参数传递.