I have a problem, that I cannot grasp at all. I'm running my Jenkins pipeline in a Docker container on the master node. Now I added another node and want to run the pipeline there as well.
However, using the same image I get different file permissions in the container:
### master
> docker image ls node:10.20.1-stretch
REPOSITORY TAG IMAGE ID CREATED SIZE
node 10.20.1-stretch c5f1efe092a0 13 days ago 912MB
> docker run --rm -ti -u 1000:1000 node:10.20.1-stretch ls -la /home/node
total 20
drwxr-xr-x 2 1000 1000 4096 May 15 20:31 .
drwxr-xr-x 3 0 0 4096 May 15 20:31 ..
-rw-r--r-- 1 1000 1000 220 May 15 2017 .bash_logout
-rw-r--r-- 1 1000 1000 3526 May 15 2017 .bashrc
-rw-r--r-- 1 1000 1000 675 May 15 2017 .profile
### node 1
> docker image ls node:10.20.1-stretch
REPOSITORY TAG IMAGE ID CREATED SIZE
node 10.20.1-stretch c5f1efe092a0 13 days ago 912MB
> docker run --rm -ti -u 1000:1000 node:10.20.1-stretch ls -la /home/node
total 20
drwxr-xr-x 2 0 0 4096 May 26 05:42 .
drwxr-xr-x 1 0 0 4096 May 26 05:42 ..
-rw-r--r-- 1 0 0 220 May 26 05:42 .bash_logout
-rw-r--r-- 1 0 0 3526 May 26 05:42 .bashrc
-rw-r--r-- 1 0 0 675 May 26 05:42 .profile
I observed a similar behavior for the /tmp directory, which has chmod 1777 on master and 1755 on node 1.
# master
> docker -v
Docker version 19.03.9, build 9d988398e7
> dockerd -v
Docker version 19.03.9, build 9d988398e7
# node 1
> docker -v
Docker version 19.03.10, build 9424aeaee9
> dockerd -v
Docker version 19.03.10, build 9424aeaee9
I assume the wrong behavior is on node 1, as the /home/node directory and all of its children are owned by root:root there, but the same directory is owned by node:node on the master. However, I already upgraded the Docker version on node 1 from 19.03.8 to 19.03.10 and nothing changed.
It there anything I don't understand about Docker containers? I have been working with them for a while, but never observed such a behavior.
