Re: All OSDs on one host down

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Yeah I think that’s along the lines of what I’ve faced here.  Hopefully i’ve managed to disable the auto updates.

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From: Clyso GmbH - Ceph Foundation Member<mailto:joachim.kraftmayer@xxxxxxxxx>
Sent: 07 August 2021 10:46
To: Andrew Walker-Brown<mailto:andrew_jbrown@xxxxxxxxxxx>; David Caro<mailto:dcaro@xxxxxxxxxxxxx>
Cc: Marc<mailto:Marc@xxxxxxxxxxxxxxxxx>; ceph-users@xxxxxxx<mailto:ceph-users@xxxxxxx>
Subject: Re:  Re: All OSDs on one host down

Hi Andrew,

we have had bad experiences with ubuntu's auto update, especially when
updating packages from systemd,dbus and docker.
for example: one effect was internal communication errors, only a
restart of the node helped.

Cheers, Joachim

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Am 07.08.2021 um 11:04 schrieb Andrew Walker-Brown:
> Thanks David,
>
> Spent some more time digging in the logs/google.  Also had a further 2 nodes fail this morning (different nodes).
>
> Looks like it’s related to apt-auto updates on Ubuntu 20.04, although we don’t run unattended upgrades.  Docker appears to get a terminate signal which shutsdown/restarts all the containers but some don’t come back cleanly.  There’s was also some legacy unused interfaces/bonds in the netplan config.
>
> Anyway, cleaned all that up...so hopefully it’s resolved.
>
> Cheers,
>
> A.
>
>
>
> Sent from Mail<https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgo.microsoft.com%2Ffwlink%2F%3FLinkId%3D550986&amp;data=04%7C01%7C%7Cb914f016fb804af1cdcd08d959882b99%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637639263643148448%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=t97przWP%2BRHkRr3o%2BrO64rLmk6KuysGnxnrmQ4S9Mn8%3D&amp;reserved=0> for Windows 10
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> From: David Caro<mailto:dcaro@xxxxxxxxxxxxx>
> Sent: 06 August 2021 09:20
> To: Andrew Walker-Brown<mailto:andrew_jbrown@xxxxxxxxxxx>
> Cc: Marc<mailto:Marc@xxxxxxxxxxxxxxxxx>; ceph-users@xxxxxxx<mailto:ceph-users@xxxxxxx>
> Subject: Re:  Re: All OSDs on one host down
>
> On 08/06 07:59, Andrew Walker-Brown wrote:
>> Hi Marc,
>>
>> Yes i’m probably doing just that.
>>
>> The ceph admin guides aren’t exactly helpful on this.  The cluster was deployed using cephadm and it’s been running perfectly until now.
>>
>> Wouldn’t running “journalctl -u ceph-osd@5” on host ceph-004 show me the logs for osd.5 on that host?
> On my containerized setup, the services that cephadm created are:
>
> dcaro@node1:~ $ sudo systemctl list-units | grep ceph
>    ceph-d49b287a-b680-11eb-95d4-e45f010c03a8@crash.node1.service                                                                                 loaded active running   Ceph crash.node1 for d49b287a-b680-11eb-95d4-e45f010c03a8
>    ceph-d49b287a-b680-11eb-95d4-e45f010c03a8@mgr.node1.mhqltg.service                                                                            loaded active running   Ceph mgr.node1.mhqltg for d49b287a-b680-11eb-95d4-e45f010c03a8
>    ceph-d49b287a-b680-11eb-95d4-e45f010c03a8@mon.node1.service                                                                                   loaded active running   Ceph mon.node1 for d49b287a-b680-11eb-95d4-e45f010c03a8
>    ceph-d49b287a-b680-11eb-95d4-e45f010c03a8@osd.3.service                                                                                       loaded active running   Ceph osd.3 for d49b287a-b680-11eb-95d4-e45f010c03a8
>    ceph-d49b287a-b680-11eb-95d4-e45f010c03a8@osd.7.service                                                                                       loaded active running   Ceph osd.7 for d49b287a-b680-11eb-95d4-e45f010c03a8
>    system-ceph\x2dd49b287a\x2db680\x2d11eb\x2d95d4\x2de45f010c03a8.slice                                                                         loaded active active    system-ceph\x2dd49b287a\x2db680\x2d11eb\x2d95d4\x2de45f010c03a8.slice
>    ceph-d49b287a-b680-11eb-95d4-e45f010c03a8.target                                                                                              loaded active active    Ceph cluster d49b287a-b680-11eb-95d4-e45f010c03a8
>    ceph.target                                                                                                                                   loaded active active    All Ceph clusters and services
>
> where the string after 'ceph-' is the fsid of the cluster.
> Hope that helps (you can use the systemctl list-units also to search the specific ones on yours).
>
>
>> Cheers,
>> A
>>
>>
>>
>>
>>
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>> From: Marc<mailto:Marc@xxxxxxxxxxxxxxxxx>
>> Sent: 06 August 2021 08:54
>> To: Andrew Walker-Brown<mailto:andrew_jbrown@xxxxxxxxxxx>; ceph-users@xxxxxxx<mailto:ceph-users@xxxxxxx>
>> Subject: RE: All OSDs on one host down
>>
>>> I’ve tried restarting on of the osds but that fails, journalctl shows
>>> osd not found.....not convinced I’ve got the systemctl command right.
>>>
>> You are not mixing 'not container commands' with 'container commands'. As in, if you execute this journalctl outside of the container it will not find anything of course.
>>
>>
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> --
> David Caro
> SRE - Cloud Services
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