Hi Tony,
Afaik those container flags just set the defaults and the config options override them. Setting the necessary flags (https://docs.ceph.com/en/latest/cephadm/operations/#logging-to-files) seemed to work for me.
[ceph: root@vm-00 /]# ceph config get osd.0 log_to_file
false
[ceph: root@vm-00 /]# ceph config show osd.0 log_to_file
false
[ceph: root@vm-00 /]# ceph config set global log_to_file true
[ceph: root@vm-00 /]# ceph config set global mon_cluster_log_to_file true
[ceph: root@vm-00 /]# ceph config get osd.0 log_to_file
true
[ceph: root@vm-00 /]# ceph config show osd.0 log_to_file
true
[ceph: root@vm-00 /]# ceph config get osd.0 log_to_file
false
[ceph: root@vm-00 /]# ceph config show osd.0 log_to_file
false
[ceph: root@vm-00 /]# ceph config set global log_to_file true
[ceph: root@vm-00 /]# ceph config set global mon_cluster_log_to_file true
[ceph: root@vm-00 /]# ceph config get osd.0 log_to_file
true
[ceph: root@vm-00 /]# ceph config show osd.0 log_to_file
true
[ceph: root@vm-00 /]# ceph version
ceph version 16.2.7-601-g179a7bca (179a7bca8a84771b0dde09e26f7a2146a985df90) pacific (stable)
ceph version 16.2.7-601-g179a7bca (179a7bca8a84771b0dde09e26f7a2146a985df90) pacific (stable)
[ceph: root@vm-00 /]# exit
exit
[root@vm-00 ~]# ls /var/log/ceph/413f7ec8-a91e-11ec-9b02-52540092b5a3/
ceph.audit.log ceph.cephadm.log ceph.log ceph-mgr.vm-00.ukcctb.log ceph-mon.vm-00.log ceph-osd.0.log ceph-osd.10.log ceph-osd.2.log ceph-osd.4.log ceph-osd.6.log ceph-osd.8.log ceph-volume.log
exit
[root@vm-00 ~]# ls /var/log/ceph/413f7ec8-a91e-11ec-9b02-52540092b5a3/
ceph.audit.log ceph.cephadm.log ceph.log ceph-mgr.vm-00.ukcctb.log ceph-mon.vm-00.log ceph-osd.0.log ceph-osd.10.log ceph-osd.2.log ceph-osd.4.log ceph-osd.6.log ceph-osd.8.log ceph-volume.log
On Mon, Mar 21, 2022 at 1:06 AM Tony Liu <tonyliu0592@xxxxxxxxxxx> wrote:
Hi,
After reading through doc, it's still not very clear to me how logging works with container.
This is with Pacific v16.2 container.
In OSD container, I see this.
```
/usr/bin/ceph-osd -n osd.16 -f --setuser ceph --setgroup ceph --default-log-to-file=false --default-log-to-stderr=true --default-log-stderr-prefix=debug
```
When check ceph configuration.
```
# ceph config get osd.16 log_file
/var/log/ceph/$cluster-$name.log
# ceph config get osd.16 log_to_file
true
# ceph config show osd.16 log_to_file
false
```
Q1, what's the intention of those log settings in command line? It's high priority and overrides
configuration in file and mon. Is there any option not doing that when deploy the container?
Q2, since log_to_file is set to false by command line, why there is still loggings in log_file?
The same for mgr and mon.
What I want is to have everything in log file and minimize the stdout and stderr from container.
Because log file is managed by logrotate, it unlikely blow up disk space. But stdout and stderr
from container is stored in a single file, not managed by logrotate. It may grow up to huge file.
Also, it's easier to check log file by vi than "podman logs". And log file is also collected and
stored by ELK for central management.
Any comments how I can achieve what I want?
Runtime override may not be the best option, cause it's not persistent.
Thanks!
Tony
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