Docker: Memory total missing data

[s3ct0r]

Hello,
i have zabbix server 6.4.10, and the agent on the remote server also is the latest,
what i noticed is that the if i go to Latest data on my host and select the specific containers the graphs about Total Memory Usage are populated correctly,
but the graph "Docker: Memory total" which should contain the total usage of the memory of all the containers all together, isn't populated at all.
Is there any action i should do or this is a bug of the template (Docker by Zabbix agent 2)?
Thank you for the support.

[s3ct0r]

Done with a custom script.

following the Script:

docker stats --no-stream --format 'table {{.MemUsage}}' | sed -n '1!p' | cut -d '/' -f1 | sed 's/GiB/ * 1024 MiB/;s/MiB/ * 1024 KiB/;s/KiB/ * 1024/; s/$/ +\\/; $a0' | bc | numfmt --to=iec-i --suffix=B

[Shaman0S]

Item "Docker: Memory total" (docker.mem.total) is a dependent item from "Docker: Get info" (docker.info).

Try to test docker.info on a host. It should provide you some json output. Check whether output contains "MemTotal" field.

I have 6.4.10 installed but haven't updated template yet. Don't have this problem

[s3ct0r]

Hello Shaman0S,
if i test manually i get an error,

and on the server
user@server-01:~$ docker info | grep -i mem
Total Memory: 15.61GiB
But this memory is the total memory of the server, not the total memory used by docker.
Any ideas?

[Shaman0S]

Hi,

You need to test parent docker.info item (see screenshot below)



Check if MemTotal is inside json output

[s3ct0r]

Hi Shaman0S,
i dont see the first foto,
can please upload again?
P.S yes the
"MemTotal":16756031488
is there, but this isn't the total usage of the docker, this is the total memory of the server.
Any ideas?

[Shaman0S]

Also,

But this memory is the total memory of the server, not the total memory used by docker.

That's true and by design. You may want to look into Memory usage items for your containers as stacked graph. It will bring you overall picture of memory consumption by containers (similar to `docker stats`output)

[s3ct0r]

Yes, i already have the graphs for the single containers,
but i need a new graph to the Total Memory of all the containers all together
Do you have any stuff regarding this?
Sure i can make a script and add a new item on the specific host, but its a custom config, it would be great to have this feature by default on the template.

[Shaman0S]

Have nothing like that. Available memory on a host plus individual containers' stats work fine for me.

[s3ct0r]

Thanks Shaman0S,
i'll work on this, if i get a good result i'll share it here.

[s3ct0r]

Done with a custom script.

following the Script:

docker stats --no-stream --format 'table {{.MemUsage}}' | sed -n '1!p' | cut -d '/' -f1 | sed 's/GiB/ * 1024 MiB/;s/MiB/ * 1024 KiB/;s/KiB/ * 1024/; s/$/ +\\/; $a0' | bc | numfmt --to=iec-i --suffix=B