[DRBD-user] Linstor/DRBD Documentation Gap: Using Multiple Network Paths

[Eric Robinson]

We tried to follow the Linstor documentation for setting up multiple network paths, but there seems to be a step missing.

First, we created 2 NICs on each node...


# linstor node interface create ha52a-cl nic_core 192.168.8.100
# linstor node interface create ha52a-cl nic_repl 198.51.100.100

# linstor node interface create ha52b-cl nic_core 192.168.8.102
# linstor node interface create ha52b-cl nic_repl 198.51.100.102

The we set the preferred NIC for the storage pools...


# linstor storage-pool set-property ha52a-cl spool2 PrefNic nic_core

# linstor storage-pool set-property ha52b-cl spool2 PrefNic nic_core

Then we created the resource...

# linstor resource-group spawn-resources rgroup2 site436 603G

The resource was created successfully, but the .res file only shows communication happening on one NIC.

    connection
    {

        disk
        {
            c-fill-target 1048576;
            c-max-rate 2048000;
        }
        host ha52a.mycharts.md address ipv4 198.51.100.100:7415;
        host ha52b.mycharts.md address ipv4 198.51.100.102:7415;
    }

Per the DRBD 9 docs, there should be "path" entries like this...


resource site436 {

  ...

  connection {

    path {

      host ha52a-cl address 192.168.8.100:7900;

      host ha52b-cl address 192.168.8.102:7900;

    }

    path {

      host ha52a-cl address 198.51.100.100:7900;

      host ha52b-cl address 198.51.100.102:7900;

    }

  }

  ...

}

What did we miss? There seems to be a step missing in the documentation where it tells you how to make DRBD use both NICs and not just the preferred one.

-Eric






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