2:28 a.m.
On Wed, Jul 31, 2019 at 4:41 PM Michael Frank <micha(a)metrox.org> wrote:
Hi,
since several days i try to install the hosted engine initially to an
iscsi multipath device without success.
Some information on the environment:
- Version 4.3.3
- using two 10gbe interfaces as single bond for the ovirtmgmt interface
- using two 10gbe storage interfaces on each hypervisor for iscsi storage
-- each storage interface is configured without any bonding, etc
-- each storage interface lives in a separate vlan were also the iscsi
Portals/target are available, the iscsi portals have 4x10ge interfaces
each, (2 in vlan xx and 2 interfaces in vlan yy )
-- so; each storage interface is connected to two iscsi Portals via 4
interfaces
The documentation here is for me unclear:
https://ovirt.org/documentation/self-hosted/chap-Deploying_Self-Hosted_En...
>Note: To specify more than one iSCSI target, you must enable multipathing
before deploying the self-hosted engine. There is also a Multipath >Helper
tool that generates a script to install and configure multipath with
different options.
This indicates for me that it should be possbile to install the HE
directly on the /dev/mapper/mpath device which is availibale when I have
prepared the host accordingly before installing the HE (log in to multiple
iscsi targets, create proper multipath,conf, etc) - right ?
I login to the two iscsi portals and get in sum 8 pathes, 4 from each
interface and iscsi target.
Basically I have then the mpath device on the hypervisor available and i
can mount the mpath device and put data on it.
In the cockpit interface the mount can also be activated and is recognized
correctly.
multipathd -ll and lsblk looks good. Everything seems to be fine.
But when I run the "hosted-engine" --deploy, the last option while running
the assistant is to enter the iscsi data.
So, basically i just want to define my mpath device - when entering the
data (ip, port)for the iscsi Portal I can see the 4 pathes of the single
hosted Engine target,
and when i choose the path where the "lun" is finally available it fails.
I think in general this option is not that what i want to have
here for using the multipath device.
I' m lost - what is the usual way to install the HE on a multipath device ?
Sorry for the delay, I missed this thread.
From ovirt-hosted-engine-setup you can configure the iSCSI storage domain,
exposed by a single iSCSI target, to be accessed over multiple portals in a
single portal group.
Once you have a running engine you can eventually complete the
configuration creating an iSCSI bond from there.
Follow this guide for that:
https://ovirt.org/documentation/admin-guide/chap-Storage.html#configuring...
Let's now focus on the first part.
On your SAN you should create more than one iSCSI portal.
Then you should group them in a single iSCSI target portal group.
You iSCSI target should be configured to be exposed over the whole iSCSI
target portal group.
Then you have to create a LUN for the hosted-engine storage domain and
associate it with that iSCSI target.
Now, on hosted-engine-setup (via CLI or via cokpit) you should enter the IP
address or one of the iSCSI portals (and eventually one username/password
couple for the iSCSI discovery).
The iSCSI discovery process will report back your iSCSI targets and the
address of other iSCSI portals in the same iSCSI target portal group; each
of them will be a path so if you have more than one iSCSI portal in a
single iSCSI target portal group you will have multipath.
Next step is choosing one of the listed iSCSI targets, then
hosted-engine-setup will list the LUNs there and you will be able to choose
one of them to be used for the hosted-engine storage domain.
Do i have to change the configuration of the storage interfaces or the
iscsi network design?
Did I missed something obvious ?
Can I put in my multipath data into the answerfile to get rid of the last
step of the assistant ?
Can I use the related ansible role for specify the Mpath device which is
available when activating the multipath service ?
Is it not possible in general ?? :
https://bugzilla.redhat.com/show_bug.cgi?id=1193961
Sorry in advance for the long mail .... 1!^^
br,
michael
Sent from a mobile device
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