Feature Request: docker stats

[uri200]

Hey @mikaku ,
One more suggestion: what about docker stats? It'd be cool to have something like docker_processes where we could throw names of containers to be tracked.

$ docker stats redis1 redis2 CONTAINER CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O
 redis1 0.07% 796 KB / 64 MB 1.21% 788 B / 648 B 3.568 MB / 512 KB
 redis2 0.07% 2.746 MB / 64 MB 4.29% 1.266 KB / 648 B 12.4 MB / 0 B

Just a suggestion. No rush at all.

Thanks!

[uri200]

Just touching this, in case it could be look through again :)

[mikaku]

Yes, I'm a bit busy lately at work, so that's why this and other issues may seem freezed.
Sorry for the inconveniences.

[mikaku]

@uri200,

I don't have docker but podman since I'm using Fedora, but I think they are similar, if not the same.
I'm not very versed with containers so, excuse my ignorance.

I've create a test docker with podman run -it fedora bash under my regular desktop user. I'm able to see the stats of this docker with:

$ podman stats -a --no-stream
ID            NAME             CPU %       MEM USAGE / LIMIT  MEM %       NET IO      BLOCK IO    PIDS        CPU TIME    AVG CPU %
2e61a62db12f  nostalgic_allen  2.88%       7.066MB / 8.188GB  0.09%       -- / --     -- / --     1           46.959ms    2.88%

But I've seen that executing the same command under root it returns nothing.
Since Monitorix runs under root, do you know a way to get the same statistics using the root user?

[ehnwebmaster]

See docker stats with Monitorix will be really nice

docker stats -a --no-stream and sudo docker stats produces the same behaviour::

CONTAINER ID   NAME        CPU %     MEM USAGE / LIMIT     MEM %     NET I/O           BLOCK I/O        PIDS
ade4d2b8366d   ubuntu      0.00%     0B / 0B               0.00%     0B / 0B           0B / 0B          0
955b4fd616b3   mobsf       0.01%     57.61MiB / 7.812GiB   0.72%     1.23MB / 816kB    22.6MB / 0B      3
860688fc4d71   portainer   0.00%     23.86MiB / 31.05GiB   0.08%     1.22MB / 2.29MB   10.2MB / 5.6MB   9

Dependencies will be docker-py

Currently I'm using glances (python) to seed docker stats

https://github.com/nicolargo/glances

CONTAINERS 2 (served by Docker 20.10.12)
Name Status CPU% MEM IOR/s IOW/s RX/s TX/s Command
mobsf running 0.0 60.0M 0b 0b 0b 0b
portainer running 0.0 29.9M 0b 0b 0b 0b ["/portainer"]

Another tool is ctop

[mikaku]

@ehnwebmaster,

I see differences when running podman stats -a --no-stream either under the regular user which is running a container, and root:

$ podman stats -a --no-stream

ID            NAME                CPU %       MEM USAGE / LIMIT  MEM %       NET IO       BLOCK IO    PIDS        CPU TIME    AVG CPU %
6725ce9cb235  compassionate_bose  0.00%       57.34kB / 16.63GB  0.00%       430B / 110B  0B / 0B     1           7.45ms      0.00%
$ 

It seems that root user is unable to see all running containers (Fedora 36):

# podman stats -a --no-stream
ID          NAME        CPU %       MEM USAGE / LIMIT  MEM %       NET IO      BLOCK IO    PIDS        CPU TIME    AVG CPU %

Also, the same command under root clears the screen before showing any stats.

What am I missing?

[foxbg]

It looks that this is podman feature.

to see containers for user with uid 1000 run:
systemd-run --uid=1000 --pty --wait --collect --service-type=exec /usr/bin/podman ps -a
Source: https://unix.stackexchange.com/questions/680171/list-containers-from-other-users

For docker this "hack" is not required as root can see all containers.

[mikaku]

Yes, but this would complicate the configuration on a system with multiple users using podman.
I'd like to know if there is a way to list all containers of all users with a single command.

[foxbg]

Not a podman expert. As far as I know not for podman. And my understanding is that this is by design for Rootless. Maybe we can ask in podman (https://github.com/containers/podman).
Docker (the request is for docker) lists all containers for all users (again AFAIK) by default.

[mikaku]

I think you're right, as you said, podman is rootless by design, so I guess it won't be possible to do it with it.
So, better focus on Docker.