Hi!
It looks like when connecting to existing docker container with `docker
exec` CONFIG_GRKERNSEC_PROC_USERGROUP (and probably
CONFIG_GRKERNSEC_PROC_USER too) hide processes started by `docker run`
from processes started by `docker exec` (all processes are running as
docker "root", docker daemon is started with default options, i.e. without
--userns-remap).
Why is this happens and is there any workaround?
$ sudo zgrep GRKERNSEC_PROC_USER /proc/config.gz
# CONFIG_GRKERNSEC_PROC_USER is not set
CONFIG_GRKERNSEC_PROC_USERGROUP=y
$ docker run -d -it --rm --init alpine sh -c 'ps ax; exec sleep 42'
49bec4451495563d702ad0edb9a7c80a9a7f5918fab4eb67e5a44b803f3ac656
$ docker logs 49bec4451495
PID USER TIME COMMAND
1 root 0:00 /dev/init -- sh -c ps ax; exec sleep 42
7 root 0:00 sh -c ps ax; exec sleep 42
8 root 0:00 ps ax
$ docker exec -it 49bec4451495 ps ax
PID USER TIME COMMAND
9 root 0:00 ps ax
--
WBR, Alex.
