Hi Yaniv, 

thank you for your answer! I haven't known, that there is already such a 
monitoring tool on ovirt. 

We will sure give it a try, but we have already in our environment a monitoring 
tool, that's why I wanted to add those values, too. 

How does collectd get this data from libvirt, when the corresponding cgroup 
values are empty? 

BR Florian 





Von: "Yaniv Kaul" <yk...@redhat.com> 
An: "Florian Schmid" <fsch...@ubimet.com> 
CC: "users" <users@ovirt.org> 
Gesendet: Dienstag, 27. Juni 2017 09:08:51 
Betreff: Re: [ovirt-users] Empty cgroup files on centos 7.3 host 



On Mon, Jun 26, 2017 at 11:03 PM, Florian Schmid < [ mailto:fsch...@ubimet.com 
| fsch...@ubimet.com ] > wrote: 


Hi, 

I wanted to monitor disk IO and R/W on all of our oVirt centos 7.3 hypervisor 
hosts, but it looks like that all those files are empty. 



We have a very nice integration with Elastic based monitoring and logging - why 
not use it. 
On the host, we use collectd for monitoring. 
See [ 
http://www.ovirt.org/develop/release-management/features/engine/metrics-store/ 
| 
http://www.ovirt.org/develop/release-management/features/engine/metrics-store/ 
] 

Y. 

BQ_BEGIN
For example: 
ls -al 
/sys/fs/cgroup/blkio/machine.slice/machine-qemu\\x2d14\\x2dHostedEngine.scope/ 
insgesamt 0 
drwxr-xr-x. 2 root root 0 30. Mai 10:09 . 
drwxr-xr-x. 16 root root 0 26. Jun 09:25 .. 
-r--r--r--. 1 root root 0 30. Mai 10:09 blkio.io_merged 
-r--r--r--. 1 root root 0 30. Mai 10:09 blkio.io_merged_recursive 
-r--r--r--. 1 root root 0 30. Mai 10:09 blkio.io_queued 
-r--r--r--. 1 root root 0 30. Mai 10:09 blkio.io_queued_recursive 
-r--r--r--. 1 root root 0 30. Mai 10:09 blkio.io_service_bytes 
-r--r--r--. 1 root root 0 30. Mai 10:09 blkio.io_service_bytes_recursive 
-r--r--r--. 1 root root 0 30. Mai 10:09 blkio.io_serviced 
-r--r--r--. 1 root root 0 30. Mai 10:09 blkio.io_serviced_recursive 
-r--r--r--. 1 root root 0 30. Mai 10:09 blkio.io_service_time 
-r--r--r--. 1 root root 0 30. Mai 10:09 blkio.io_service_time_recursive 
-r--r--r--. 1 root root 0 30. Mai 10:09 blkio.io_wait_time 
-r--r--r--. 1 root root 0 30. Mai 10:09 blkio.io_wait_time_recursive 
-rw-r--r--. 1 root root 0 30. Mai 10:09 blkio.leaf_weight 
-rw-r--r--. 1 root root 0 30. Mai 10:09 blkio.leaf_weight_device 
--w-------. 1 root root 0 30. Mai 10:09 blkio.reset_stats 
-r--r--r--. 1 root root 0 30. Mai 10:09 blkio.sectors 
-r--r--r--. 1 root root 0 30. Mai 10:09 blkio.sectors_recursive 
-r--r--r--. 1 root root 0 30. Mai 10:09 blkio.throttle.io_service_bytes 
-r--r--r--. 1 root root 0 30. Mai 10:09 blkio.throttle.io_serviced 
-rw-r--r--. 1 root root 0 30. Mai 10:09 blkio.throttle.read_bps_device 
-rw-r--r--. 1 root root 0 30. Mai 10:09 blkio.throttle.read_iops_device 
-rw-r--r--. 1 root root 0 30. Mai 10:09 blkio.throttle.write_bps_device 
-rw-r--r--. 1 root root 0 30. Mai 10:09 blkio.throttle.write_iops_device 
-r--r--r--. 1 root root 0 30. Mai 10:09 blkio.time 
-r--r--r--. 1 root root 0 30. Mai 10:09 blkio.time_recursive 
-rw-r--r--. 1 root root 0 30. Mai 10:09 blkio.weight 
-rw-r--r--. 1 root root 0 30. Mai 10:09 blkio.weight_device 
-rw-r--r--. 1 root root 0 30. Mai 10:09 cgroup.clone_children 
--w--w--w-. 1 root root 0 30. Mai 10:09 cgroup.event_control 
-rw-r--r--. 1 root root 0 30. Mai 10:09 cgroup.procs 
-rw-r--r--. 1 root root 0 30. Mai 10:09 notify_on_release 
-rw-r--r--. 1 root root 0 30. Mai 10:09 tasks 


I thought, I can get my needed values from there, but all files are empty. 

Looking at this post: [ 
http://lists.ovirt.org/pipermail/users/2017-January/079011.html | 
http://lists.ovirt.org/pipermail/users/2017-January/079011.html ] 
this should work. 

Is this normal on centos 7.3 with oVirt installed? How can I get those values, 
without monitoring all VMs directly? 

oVirt Version we use: 
4.1.1.8-1.el7.centos 

BR Florian 
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BQ_END


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