Docker：docker：来自守护进程的错误响应：linux 规范用户：无法找到用户 myuser：passwd 文件中没有匹配的条目

Question

[root@mymachine redisc]# docker run -p 6379:6379 --user myuser redisc
docker: Error response from daemon: linux spec user: unable to find user myuser: no matching entries in passwd file.

but i can become myuser on the host

[root@mymachine redisc]# sudo su myuser
[myuser@mymachine redisc]#

How would i be able to run as myuser in the container?

Answer 1

The host and the container are completely separate. You need to create myuser inside the redisc container before you try and run stuff as that user.

Answer 2

According to the documentation you can use the ID of the user / group:

When passing a numeric ID, the user does not have to exist in the container.

Source: https://docs.docker.com/engine/reference/run/#user

The command could look like this:

docker run -p 6379:6379 --user 1001 redisc

Answer 3

You can mount read-only the host user info

# user user and group IDs:
usr="--user $(id -u myuser):$(id -g myuser)"
mountdirs="-v /etc/passwd:/etc/passwd:ro -v /etc/shadow:/etc/shadow:ro -v /etc/group:/etc/group:ro"

options="-p 6379:6379"
# I use 
# options="-ti --rm --entrypoint=/bin/bash"

image=redisc

docker run ${options} ${usr} ${mountdirs} -w /home/myuser "${image}"

Answer 4

[root@host ~]# docker run --user=toto -ti fedora:26 uname

/usr/bin/docker-current: Error response from daemon: linux spec user: unable to find user toto: no matching entries in passwd file.

[root@host ~]# docker run --user= id -u toto -ti fedora:26 uname

Linux

Answer 5

I mistakenly thought a permission denied error was about access to my filesystem. I built a container that has a bash script as the entrypoint, but didn't give myself execution permission before building the image.

chmod +x entrypoint.sh and rebuilding the image solved my issue.