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тАО01-06-2011 12:42 PM
тАО01-06-2011 12:42 PM
vSphere takes 10 minutes to reconnect to volume?
The P4000 management group has 2 clusters in it, with each cluster currently having a single volume accessible to the vSphere box.
The vSphere box is setup to use vSphere MPIO with round-robin.
So, I pull the power on the iSCSI switch, watch in vSphere, the NICs go down, the iSCSI connection is lost to both volumes.
I put power back to the switch, watch in vSphere, the NICs come back up, the connection to one volume comes back, the other volume stays offline for around 10 minutes at which point it comes back of its own accord.
Is there anything I may have missed here that would account for this?
I did find this which suggests I may need to disable iSCSI load balancing on the Server object in the CMC?
http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1016836
Thanks in advance.
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тАО01-06-2011 12:44 PM
тАО01-06-2011 12:44 PM
Re: vSphere takes 10 minutes to reconnect to volume?
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тАО01-11-2011 03:15 AM
тАО01-11-2011 03:15 AM
Re: vSphere takes 10 minutes to reconnect to volume?
I'm confused as my nodes are in the correct sites/switch as are my servers, so I would assume that pulling a single site would mean that the resources in the remaining site stay online which is not what I'm consistently seeing (it seems to vary depending which node the initial gateway connections are made through).
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тАО01-11-2011 04:44 AM
тАО01-11-2011 04:44 AM
Re: vSphere takes 10 minutes to reconnect to volume?
You do not specify which version of vSphere you are using; from my experience of using vSphere 4.0 U2 connecting to P4000 VSAs, you may be having an "All Paths Dead" (APD) on your vSphere servers when connectivity is broken to your iSCSI volumes. If this is the case, you will see a bunch of errors in your servers vmkwarning logs. You would have to patch your servers and apply some configuration changes; search on the string above.
Alain
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тАО01-11-2011 04:50 AM
тАО01-11-2011 04:50 AM
Re: vSphere takes 10 minutes to reconnect to volume?
I've been using 4.1 (vmware edition) but could use 4.0 U2 or the HP ESX ISO (not entirely clear which additional drivers/patches this has applied).
Be appreciative of any suggestions as I don't have an explicit need to use anything other than a 4.x release.
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тАО01-11-2011 04:57 AM
тАО01-11-2011 04:57 AM
Re: vSphere takes 10 minutes to reconnect to volume?
Alain
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тАО01-11-2011 05:12 AM
тАО01-11-2011 05:12 AM
Re: vSphere takes 10 minutes to reconnect to volume?
I had been pinging all the cluster IPs from a laptop connected to the switch infrastructure, rather than pinging from the vsphere hosts at the time of a dropout/failure.
When the LUNs disappear I can ping one cluster IP but not the other.
This obviously suggests the vsphere hosts in some way shape or form.
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тАО01-11-2011 05:14 AM
тАО01-11-2011 05:14 AM
Re: vSphere takes 10 minutes to reconnect to volume?
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тАО01-11-2011 05:20 AM
тАО01-11-2011 05:20 AM
Re: vSphere takes 10 minutes to reconnect to volume?
Alain
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тАО01-11-2011 05:53 AM
тАО01-11-2011 05:53 AM
Re: vSphere takes 10 minutes to reconnect to volume?
What is odd is that all of the servers are connected to a dedicated switch infrastructure.
When we have the issue, neither vSphere host will ping *one* of the cluster IPs but will ping the other one.
The vSphere hosts will ping all the individual nodes in both clusters.
A laptop connected to the switches will ping both cluster IPs.