[CentOS-devel] [opstools] fluentd packaging

Rich Megginson

rmeggins at redhat.com
Thu Aug 11 13:44:43 UTC 2016

On 08/11/2016 07:36 AM, Lars Kellogg-Stedman wrote:
> On Wed, Aug 10, 2016 at 07:27:45AM -0600, Rich Megginson wrote:
>> On 08/09/2016 03:41 PM, Lars Kellogg-Stedman wrote:
>>> In working with the fluentd packaging from the opstools sig, I think
>>> we need to make at least two changes:
>>> - For type=tail sources, fluentd really wants a pos_file parameter to
>>>    track the file position.  It would be helpful if we created
>>>    /run/fluentd via /etc/tmpfiles.d as a common location for storing
>>>    these files.
>> +1 - as long as the location is configurable.  OpenShift typically keeps its
>> pos_file in the log directory (e.g. /var/log) that is mounted from the host.
> I don't know about configureable. I mean, I am proposing that the
> package drops a file into /etc/tmpfiles.d, which would make it a
> system-wide default, although of course individual <source> blocks
> could use whatever path they wish.
> As the package is distributed, with fluentd running as an unprivileged
> user, it's not going to have write access to most log directories, so
> putting the pos files there won't work in most cases without changes
> to directory permissions.
> If everyone is colocating pos files with log files, this proposal
> doesn't seem all that useful. For now, I'm probably going to tackle
> this in a puppet module that is consuming fluentd, rather than the
> package itself.

OpenShift runs fluentd in a privileged pod (for now - soon to be a 
hostmount-anyuid once the selinux issues are fixed) and bind mounts 
/var/log, /var/lib/docker (for docker --log-driver=json-file), and 
/run/log (for docker --log-driver=journald) from the host into the 
pod/container.  It has to keep the pos file outside of the container/pod 
in the host file system, typically /var/log/*.pos.  As long as that is 
possible with the proposed opstools fluentd packaging, that's fine.

> _______________________________________________
> CentOS-devel mailing list
> CentOS-devel at centos.org
> https://lists.centos.org/mailman/listinfo/centos-devel

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.centos.org/pipermail/centos-devel/attachments/20160811/be61b689/attachment-0004.html>

More information about the CentOS-devel mailing list