Re: handling qemu-guest logs in ceph-ansible

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On Mon, Aug 1, 2016 at 12:25 PM, Ken Dreyer <kdreyer@xxxxxxxxxx> wrote:
> With the new unprivileged user support in Jewel, I'm seeing some
> issues with logging and file permissions.
>
> ceph-ansible always configures client logging on every cluster node, like so:
>
>   [client]
>   log file = /var/log/ceph/qemu-guest-$pid.log
>
> As a result, every single client command (eg "ceph health") will
> create a new root-owned "qemu-guest-$pid" log file (which leads to
> issues with logrotate failing to rotate the root-owned files in the
> diretory...)
>
> It's clear we need to remove that bit from the ceph.conf files that
> ceph-ansible writes, but I'm wondering what it *should* be?
>
> Is there a more granular way to configure Ceph so that we only log
> qemu/librbd interactions to qemu-guest-$pid, rather than all client
> logs?

I don't know the full toolchain these all use (is this for teuthology
or a wider thing?), but generally:
* you can specify different config files on the command line when the
client starts
* you can specify override config values of any kind on the command
line when a client starts
* I believe that QEMU/KVM configs for CephFS let you specify config
values independently
* I think(?) you can specify config "sections" based on specific
client IDs, not just the [client] type

So I'd look into whichever of those options is most convenient. :)
-Greg
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