Re: openstack with ceph rbd vms IO/erros

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EDH - Manuel Rios Fernandez <mriosfer@xxxxxxxxxxxxxxxx> 于2019年5月17日周五 下午3:23写道:
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> Did you check your KVM host RAM usage?
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> We saw this on host very very loaded with overcommit in RAM causes a random crash of VM.
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> As you said for solve must be remounted externaly and fsck. You can prevent it disabled ceph cache at Openstack Nova host. But your VM’s are going get less performance.
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> Whats you Ceph & Openstack version?
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> Regards
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> De: ceph-users <ceph-users-bounces@xxxxxxxxxxxxxx> En nombre de ??
> Enviado el: viernes, 17 de mayo de 2019 9:01
> Para: ceph-users <ceph-users@xxxxxxxxxxxxxx>
> Asunto:  openstack with ceph rbd vms IO/erros
>
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>
> hi:
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>  I hava a openstack cluster with a ceph cluster ,use rbd,ceph cluster use ssd  pool tier.
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> some vm on openstack sometimes crashed in two case .
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> 1.  become readonly filesystem. after reboot ,it work fine again.
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> 2.  IO errors . I must  repair the file system by fsck. thenreboot , it work fine again.
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> I do not know if this is ceph bugs or kvm bugs.
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Do you have set 'osd_enable_op_tracker=true' and what the value of '
osd_op_complaint_time' ? If you set above 2 configure items, did you
cluster report 'slow request'?
> I need some ideas to resolv this ,    Anyone can help me ?
>
> Look forward to your reply
>
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> ceph-users mailing list
> ceph-users@xxxxxxxxxxxxxx
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-- 
Thank you!
HuangJun
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