Hello.

For example:

proc/113197/task/113197
[root@opvaames06 113197]# cat cgroup
10:devices:/
9:perf_event:/
8:freezer:/mesos/3af01ccb-ace4-4467-84e9-1e6ae28d6dd7
7:memory:/mesos/3af01ccb-ace4-4467-84e9-1e6ae28d6dd7
6:cpuset:/
5:net_cls:/
4:cpuacct,cpu:/mesos/3af01ccb-ace4-4467-84e9-1e6ae28d6dd7
3:hugetlb:/
2:blkio:/
1:name=systemd:/mesos_executors.slice

First line: 10: devices:/.

>From a mail on the cadvisor mailing list:
cAvisor uses `ps` to group processes into cgroups. `ps` uses `devices` cgroups 
to identify the cgroups of a process. In your case, devices cgroup is still set 
to root `/`.


Thanks for the answer.

________________________________
De : haosdent <haosd...@gmail.com>
Envoyé : vendredi 29 juillet 2016 16:21:07
À : user
Objet : Re: Cadvisor and Mesos: cgroup monitoring

>- is there a way to "link" the cgroup id to the mesos task id?
The cgroup id you saw is the ContainerId actually. You could get the mapping 
relations from querying the state endpoint of Mesos agent.

>In mesos, this information is set to /, so all my process are shown in the / 
>cgroup.
May you mind provide more details about this? As I know, all the mesos 
containers should under `Flags::cgroups_root` which default value is "mesos".

In additionally, do you ever try the `/metrics/snapshot` endpoints of Mesos 
Master and Mesos Agent, which provide some useful messages could used to 
monitor as well.

On Fri, Jul 29, 2016 at 10:07 PM, 
aurelien.de...@gmail.com<mailto:aurelien.de...@gmail.com> 
<aurelien.de...@gmail.com<mailto:aurelien.de...@gmail.com>> wrote:



Hello.


I'm trying to find a solution to monitor the real usage of my mesos tasks. I 
don't use docker at all, but I gave a look to cadvisor.


Unfortunatly, cadvisor uses ps and the device information to determine the 
cgroup ownership of a process. In mesos, this information is set to /, so all 
my process are shown in the / cgroup.


I can monitor the usage of the cgroups however, but I have no clue of which 
process are inside, and the cgroup name is not related to the taskid in mesos.


So, 3 questions:

- is anybody managed to use cadvisor (with ou without mesos) for cgroups?

- is there a "better" solution ?

- is there a way to "link" the cgroup id to the mesos task id?


Thanks for any clue.


And a good sysadmin appreciation day!


Aurélien.




--
Best Regards,
Haosdent Huang

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