iSCSI MPIO + HP P2000 G3

[tomstephens89]

The wiki maybe could need some clarification and perhaps improve the GUI to be multipath aware.

The wiki explains creating iscsi connections simply to configure an initiator for each path which equals discovery and connect from CLI. Once the initiators has been configured properly you turn to multipath tools to pair the two paths to a single logical path which is given a name. This name is used from CLI to create a logical PV and a logical VG. After you have created the logical VG you can access this VG from within the GUI to create LV's used for storage.

Thanks!

So this means my thoughts were correct. My first step would be to configure an iSCSI initiator from the GUI for EVERY path to the SAN. Mine has 4, so I would configure iSCSI in the GUI 4 times, each with the different path to the SAN?

Tom

 

[mir]

Yes, and after that turn to multipath tools from CLI.

 

[tomstephens89]

Another question,

So, in order:

1. Cluster 16 proxmox nodes
2. Add the iSCSI initiators in GUI
3. Create multipath config on first node

Now I need some advice:

4. Do I now copy the multipath config to the other nodes?
5. The last step in the thread you linked to was to run pvcreate and vgcreate in order to expose a device to the GUI on which i can add LVM storage. Do I only run pv and vgcreate only on my first node and it syncs automatically?

 

[mir]

The multipath config needs to be copied to every node.
pv- and vgcreate should only need to be run on the first node since it should be auto discovered on the other nodes.

I am not absolutely sure but I think a reboot of the nodes after copying the multipath config is in order.

 

[tomstephens89]

The multipath config needs to be copied to every node.
pv- and vgcreate should only need to be run on the first node since it should be auto discovered on the other nodes.

I am not absolutely sure but I think a reboot of the nodes after copying the multipath config is in order.

Excellent thanks!

If this all works out, I think its probably a good idea to write a guide with screenshots because the iSCSI and MPIO information is lacking but its a massively important feature and the easier it is the better. Especially for those of us coming from a VMWare background like myself.

 

[mir]

Since adding input to the wiki is open to the public (registration of course is needed) you could improve the wiki yourself with your own experiences and screenshots?