[Pacemaker] CoroSync's UDPu transport for public IP addresses?

[Dmitry Koterov]

>
> On Mon, Dec 29, 2014 at 1:50 PM, Dejan Muhamedagic <dejanmm at fastmail.fm>
> wrote:
> >> On Mon, Dec 29, 2014 at 06:11:49AM +0300, Dmitry Koterov wrote:
> >> Hello.
> >>
> >> I have a geographically distributed cluster, all machines have public IP
> >> addresses. No virtual IP subnet exists, so no multicast is available.
> >>
> >> I thought that UDPu transport can work in such environment, doesn't it?
> >>
> >> To test everything in advance, I've set up a corosync+pacemaker on
> Ubuntu
> >> 14.04 with the following corosync.conf:
> >>
> >> totem {
> >>   transport: udpu
> >>   interface {
> >>         ringnumber: 0
> >>         bindnetaddr: ip-address-of-the-current-machine
> >>         mcastport: 5405
> >>   }
>
>>   ...

>> }

>> nodelist {
> >>   node {
> >>     ring0_addr: node1
> >>   }
> >>   node {
> >>     ring0_addr: node2
> >>   }
> >> }

>> root at node1:/etc/corosync# crm status | grep node
> >> OFFLINE: [ node1 node2 ]
> >> and "crm node online" (as all other attempts to make crm to do
> something) are timed out with "communication error".


> Dmitry, which version do you have?


root at node1:~# corosync -v
Corosync Cluster Engine, version '2.3.3'
Copyright (c) 2006-2009 Red Hat, Inc.

- so nodelist is defenitely enough, and totem->interface->member is
deprecated.

So, am I at least right that the configuration with UDPu SHOULD work with
geo-distributed nodes with only public IP addresses and no private/virtual
subnetwork? If yes, how could I debug it?

Here's some more info (x.x.x.x is a public IP associated to node1):

root at node1:~# netstat -nap|grep coro
udp        0      0  x.x.x.x:41083     0.0.0.0:*
7037/corosync
udp        0      0  x.x.x.x:49299     0.0.0.0:*
7037/corosync
udp        0      0  x.x.x.x:5405      0.0.0.0:*
7037/corosync
unix  2      [ ACC ]     STREAM     LISTENING     52458    7037/corosync
    @quorum
unix  2      [ ACC ]     STREAM     LISTENING     52455    7037/corosync
    @cmap
unix  2      [ ACC ]     STREAM     LISTENING     52456    7037/corosync
    @cfg
unix  2      [ ACC ]     STREAM     LISTENING     52457    7037/corosync
    @cpg
unix  3      [ ]         STREAM     CONNECTED     52512    7037/corosync
    @cpg
unix  3      [ ]         STREAM     CONNECTED     52625    7037/corosync
    @cpg
unix  3      [ ]         STREAM     CONNECTED     52504    7037/corosync
    @cfg
unix  3      [ ]         STREAM     CONNECTED     52520    7037/corosync
    @quorum
unix  2      [ ]         DGRAM                    52420    7037/corosync
unix  3      [ ]         STREAM     CONNECTED     52643    7037/corosync
    @quorum
unix  3      [ ]         STREAM     CONNECTED     52568    7037/corosync
    @cpg
unix  3      [ ]         STREAM     CONNECTED     52588    7037/corosync
    @cpg
unix  3      [ ]         STREAM     CONNECTED     52554    7037/corosync
    @cpg

root at node1:~# crm status
Last updated: Tue Dec 30 04:33:40 2014
Last change: Sun Dec 28 21:40:41 2014 via crmd on node2
Stack: corosync
Current DC: NONE
2 Nodes configured
0 Resources configured
OFFLINE: [ node1 node2 ]

root at node1:~# crm node online
Error setting standby=off (section=nodes, set=nodes-1084751873):
Communication error on send
Error performing operation: Communication error on send
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