Hi Eugen,
I had deployed the cluster via cephadm. so, it's
container based. Just fyi..
So, you meant I don't need to run any commands like "ceph osd set noout" ,
"ceph orch stop osd.<ID>" ,etc.
I just need to power off all nodes starting clients nodes , osd nodes , mon
, mds nodes and power them on after maintenance activity is over.
Thanks,
Gagan
On Wed, Aug 6, 2025 at 11:53 PM Eugen Block <eblock@xxxxxx> wrote:
> You don't need to stop all the OSDs (or other daemons) manually, just
> shut down the servers (most likely you have services colocated). When
> they boot again, the Ceph daemons will also start automatically
> (they're handled by systemd). I can check tomorrow which steps exactly
> our shutdown procedure consists of when we have planned power outages
> etc.
>
> Zitat von gagan tiwari <gagan.tiwari@xxxxxxxxxxxxxxxxxx>:
>
> > HI Eugen,
> > We have 80 osds in the cluster.
> >
> > So, to stop them I will need to run the command *ceph orch stop
> osd.<ID>*
> > for all 80 osds one by one.
> > Is there any way to stop all of them in one command ?
> >
> > Also, once all nodes will be back after power maintenance activity ,
> will I
> > need to start all daemons mon , mds , osd,etc
> > ? or will they be up automatically once servers will be up ?
> >
> > Thanks,
> > Gagan
> >
> > On Wed, Aug 6, 2025 at 4:45 PM Eugen Block <eblock@xxxxxx> wrote:
> >
> >> Although SUSE discontinued their product, the procedure is still correct
> >> [0]:
> >>
> >> 1. Tell the Ceph cluster not to mark OSDs as out:
> >>
> >> ceph osd set noout
> >>
> >> 2. Stop daemons and nodes in the following order:
> >>
> >> Storage clients
> >>
> >> Gateways, for example NFS Ganesha or Object Gateway
> >>
> >> Metadata Server
> >>
> >> Ceph OSD
> >>
> >> Ceph Manager
> >>
> >> Ceph Monitor
> >>
> >> 3. If required, perform maintenance tasks.
> >>
> >> 4. Start the nodes and servers in the reverse order of the shutdown
> >> process:
> >>
> >> Ceph Monitor
> >>
> >> Ceph Manager
> >>
> >> Ceph OSD
> >>
> >> Metadata Server
> >>
> >> Gateways, for example NFS Ganesha or Object Gateway
> >>
> >> Storage clients
> >>
> >> 5. Remove the noout flag:
> >>
> >> ceph osd unset noout
> >>
> >> [0]
> >>
> >>
> https://documentation.suse.com/en-us/ses/7.1/html/ses-all/storage-salt-cluster.html#sec-salt-cluster-reboot
> >>
> >> Zitat von gagan tiwari <gagan.tiwari@xxxxxxxxxxxxxxxxxx>:
> >>
> >> > Hi Guys,
> >> > I have recently set-up a production ceph cluster
> which
> >> > consists of 3 monitor nodes and 7 Osd nodes.
> >> >
> >> > There is power maintenance activity scheduled at the data centre
> coming
> >> > weekend and due to that I need to power off all the devices.
> >> >
> >> > Can you please advise me on the safest way to power off all servers?
> >> >
> >> > Should I power off all 7 OSD servers one by one followed by all 3
> monitor
> >> > nodes or vice versa?
> >> >
> >> > Thanks,
> >> > Gagan
> >> > _______________________________________________
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> >>
> >>
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>
>
>
>
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