RE: [Xen-users] XCP pool-ha-enable

[Dave Scott <Dave.Scott@xxxxxxxxxxxxx>]

Hi,

XCP doesn't have a complete HA implementation: it's missing a host 
heartbeat/liveness service. HA enable will fail when xapi tries to start this 
daemon.

Re: the SR: Normally storage plugins are called while xapi is running normally 
and the pool-wide database is available. HA requires a shared disk and this 
disk must be attached before the pool-wide database is available. There are 
special operations for this ({generate,attach_from}_config IIRC). These are 
implemented by the LVMoISCSI and LVMoHBA SRs but not currently by the ISCSI SR.
 
Cheers,
Dave

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-
> bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Anatoliy.Poloz
> Sent: 03 March 2010 10:17
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-users] XCP pool-ha-enable
> 
> hi all, i try to use ha-enable function on my xcp pool
> but have some err msg when try to enable it
> 
> xe pool-ha-enable heartbeat-sr-uuids=aff98845-4f7d-e576-09eb-
> ec6147399fcb
> The SR backend does not support the operation (check the SR's allowed
> operations)
> sr: aff98845-4f7d-e576-09eb-ec6147399fcb (HA-ISCSI-target)
> 
> ok, lets try to who allowed operation
> 
> xe sr-list uuid=aff98845-4f7d-e576-09eb-ec6147399fcb
> params=allowed-operations
> allowed-operations (SRO)    : forget; VDI.introduce; VDI.create; plug;
> destroy; VDI.destroy; scan; VDI.clone; unplug
> 
> 
> and list of all params of SR
> 
> xe sr-list uuid=aff98845-4f7d-e576-09eb-ec6147399fcb params=all
> uuid ( RO)                    : aff98845-4f7d-e576-09eb-ec6147399fcb
>                name-label ( RW): HA-ISCSI-target
>          name-description ( RW):
>                      host ( RO): <shared>
>        allowed-operations (SRO): forget; VDI.introduce; VDI.create;
> plug; destroy; VDI.destroy; scan; VDI.clone; unplug
>        current-operations (SRO):
>                      VDIs (SRO): 8fa016f4-0705-835c-69c5-084572733f3a
>                      PBDs (SRO): 762d2779-eea2-ab49-5dba-f667da42660d;
> dda6d917-61b5-9854-2009-f296be704681
>        virtual-allocation ( RO): 1638400000
>      physical-utilisation ( RO): 1638400000
>             physical-size ( RO): 1638400000
>                      type ( RO): iscsi
>              content-type ( RO): user
>                    shared ( RW): true
>              other-config (MRW):
>                 sm-config (MRO): datatype: ISCSI; multipathable: true;
> targetIQN: iqn.2010-02.ua.od.onetelecom:storage.disk2.sys1.xyz; target:
> 10.42.1.8; disktype: Raw
>                     blobs ( RO):
> 
> 
> 
> any additional conditions needed to ctreat "heartbeat SR" ?
> 
> 
> 
> 
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