[ovirt-users] OVirt new cluster host only logins on one iSCSI

[Duarte Fernandes Rocha]

Hello,

For anyone interested this is how I solved the problem.

First, please note that as I mentioned earlier the OVirt documentation states that ALL the iscsi 
sessions/paths must be configured when adding the storage domain:

http://www.ovirt.org/documentation/admin-guide/chap-Storage/
 
Adding iSCSI Storage
...
Important: If more than one path access is required, ensure to discover and log in to the target 
through all the required paths. Modifying a storage domain to add additional paths is currently 
not supported.

So one way to fix this issue is:

1. Put the Storage domain under maintenance
2. Remove the storage domain from the datacenter (do not wipe/format)
3. Import storage domain using all the iscsi paths 

Another way that I think is better because it does not involve deleting the storage domain is to 
use the REST API and/or OVirt Shell.

The storage domain must be in maintenance and the iscsi storage connection must exist. The 
upside is that the storage domain does not have to be deleted and imported which may not be 
easy if there are VMs using that storage domain.

First we need to have the storage domain ID and the storage connection ID (this one I got using 
the first method on an empty LUN)


[oVirt shell (connected)]# list storagedomains

id         : d591d9f0-.....
name       : ISO_DOMAIN
description: ISO_DOMAIN

id         : 7d30dff2-.....
name       : LUN
description: ISCSI LUN


[oVirt shell (connected)]# list storageconnections

id         : b793b463-.....

id         : 65300f39-....

[oVirt shell (connected)]# show storageconnection 65300f39-ac93-423a-9692-15984f842ae2

id      : 65300f39-.....
address : ip.addr.x.x
port    : 3260
target  : iqn.1992-04....
type    : iscsi
username: username

With this info make a POST request to the API using curl

#!/bin/sh -ex

# https://ovirt.addr/ovirt-engine/api/storagedomains/STORAGE-DOMAIN-ID/storageconnections

url="https://ovirt.addr/ovirt-engine/api/storagedomains/521fcfdc-...../storageconnections"
User="admin at internal"
password="*********"

curl \
--insecure \
--user "${user}:${password}" \
--request POST \
--header "Accept: application/xml" --header "Content-Type: application/xml" \
--data '
<storage_connection id="430ee71d-......">
</storage_connection>
' \
"${url}"

If there are easier/simpler ways please let me know =)

-- 
Duarte Fernandes Rocha <dfr at eurotux.com>

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