Once I installed docker (or maybe Portainer), my CPU load keep at around 50%

Hello everybody,
This is my first post in the forum.

I installed OMV 5.x last week. Most of those are following Techno Dad Life 's instruction.

On my first installation, I installed CIFS/SAMBA, Plex server, transimssion, ftp and Flash Memory Plugin and no more. The OMV server is behaving good, Plex server worked, however, I noticed that the CPU are all the way hovering at around 50%. I tried Google for days and still didn't find any answer.

So I decided to re-install OMV from scratch. I did it last night. Once I finished the installation I went to Web GUI and noticed that the CPU is idling (normally from 0 to 2%, sometimes to 10%). Since I didn't know which part gone wrong, I kept on going to dashboard to check CPU for every step I made (mounting file system , add share folder, enable SAMBA/CIFS, add SAMBA shares). Still Good.

Still good until I installed docker on OMV-extra page:

I specifed the docker storage to "/sharedfolders/docker", the Web GUI showed an error, saying that /sharedfolders cannot be accessed. Then I tried the default docker storage location with "/var/lib/docker" and docker installed.

Then I installed Portainer with "Install Portainer" button on the OMV-extra page. After that, I noticed the CPU started hovering at around 50% again like my first installation.

As you can see on my screenshot below, I already stopped all services and unmount all data drive but the CPU still running busy with Kworker. Even if I uninstalled omv-extras, the CPU still busy with kworker running. I tried google with keywords like "kworker"; "omv docker problem"; "omv high cpu usage"...etc. Having tried all possible keywords I can imagine and I still didn't find any solution.

Zitat von ness1602

Hi what type of computer and kernel are you using?
Also mayber docker folder should be something outside of /sharefolder

I am using PC:
MB: Asrock N3050B-ITX with build in Intel^® Dual-Core Processor N3050
RAM: Kingston 8GB DDR3L 1600
Network card: Winyao NIC card with intel82574L inserted into the PCIe 2.0 slot
System Drive: SanDisk SSD i100 24GB

Kernel: Linux 5.3.0-0.bpo.2-amd64

Folder path is a problem. But I reverted everthing back. Stopped all services and uninstalled all plugin. CPU usage still reaching 30% to 50%

Zitat von Agricola

The default path for docker storage is not usually a good thing under most situations. When you specified the docker storage to "/sharedfolders/docker", did you first create a shared folder in the GUI called “ docker”? Also, you should not use the relative path but absolute path to your destination: /srv/dev-disk-by-label-DiskName/docker

I think /sharedfolders/docker has mapped the corresponding shared folder /srv/dev-disk-by-label-DiskName/docker. I tried to write a "test.txt" file in /srv/dev-disk-by-label-HGST/docker folder and I also see it in /sharedfolders/docker.

Zitat von geaves

As a test remove the network card and use the on board nic

Good suggestion! I will try it.

My pain is that CPU load hovering at around 50%, even though I uninstalled Docker and Portainer.
Process showing kworker/0+ eating 50% CPU resources.

Zitat von geaves

As a test remove the network card and use the on board nic

Already remove the PCIe network card. Still the same. CPU usage still hovering at 50%.

Zitat von macom

Try to boot into another kernel. You can change the kernel in omv-extras >> Kernel tab

You the man!

I have changed to Linux 4.19.0-5-amd64 kernel. CPU back to idle for 8 minutes.

May be at the time I installed docker. The newer kernel (Linux 5.3.0-0.bpo.2-amd64) has been auto-updated at the same time. Although I pay high attention to CPU usage on every steps I made, I didn't notice kernel changes. Maybe that was the problem. Now the server has been online for 20 minutes, CPU load is good!