Bug 1506330

Summary: [RFE][hosted-engine-setup] [iSCSI support] allow fail over for more than one iSCSI target
Product: [oVirt] ovirt-engine Reporter: Nikolai Sednev <nsednev>
Component: RFEsAssignee: Rob Young <royoung>
Status: CLOSED CURRENTRELEASE QA Contact: Gil Klein <gklein>
Severity: high Docs Contact:
Priority: unspecified    
Version: 4.2.0CC: bugs, ykaul
Target Milestone: ---Keywords: FutureFeature, Reopened
Target Release: ---Flags: rule-engine: planning_ack?
rule-engine: devel_ack?
rule-engine: testing_ack?
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2017-10-26 13:04:48 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: Integration RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Attachments:
Description Flags
sosreport from alma04 none

Description Nikolai Sednev 2017-10-25 17:49:47 UTC 
Description of problem:
In case if SHE-host has connection to iSCSI LUN, on which SHE-VM is deployed/being deployed, over multipath, allow reinitiating connectivity over another path, if initial path fails.  

Version-Release number of selected component (if applicable):
ovirt-hosted-engine-setup-2.2.0-0.0.master.20171016160008.git55723e8.el7.centos.noarch

How reproducible:
100%

Steps to Reproduce:
1.Deploy SHE on pair of hosts, over iSCSI LUN, while iSCSI storage server exposing the LUN from multiple NICs.
2.From host with SHE-VM block one of the iSCSI paths with iptables, i.e. "iptables -A OUTPUT -p tcp --destination-port 3260 -d <IP address of one of the iSCSI NICs> -j DROP"
3.Check status of "hosted-engine --vm-status".
4.Check "iscsiadm -m session".

Actual results:
I'm getting SHE-VM stack in paused status if one of the paths being blocked.
I'm getting all paths as active using "iscsiadm -m session", although at least one of the paths is blocked.


Expected results:
"iscsiadm -m session" should be refreshed and return up to date status.
If one of the paths fails, then host should fail over to remaining best active path.

Additional info:
Sosreport host on which I've found the issue is attached.
Comment 1 Nikolai Sednev 2017-10-25 18:00:01 UTC 
Created attachment 1343361 [details]
sosreport from alma04
Comment 2 Yaniv Kaul 2017-10-25 18:05:42 UTC 
This was the whole point of multiple targets
Comment 3 Nikolai Sednev 2017-10-25 18:56:55 UTC 
(In reply to Yaniv Kaul from comment #2)
> This was the whole point of multiple targets

I don't see this working.
iSCSI initiator not shifting to other feasible targets on my pair of hosts.
Comment 4 Nikolai Sednev 2017-10-26 13:04:48 UTC 
After retesting the https://bugzilla.redhat.com/show_bug.cgi?id=1149579 it is working as expected and fully covers this very RFE.
Moving back to previous state as was set in comment #2.