[CentOS] HA cluster - strange communication between nodes
Leon Fauster
leonfauster at googlemail.com
Wed Jan 15 23:29:28 UTC 2014
Am 15.01.2014 um 11:56 schrieb Martin Moravcik <centos at datalock.sk>:
>
> Thanks for your interest and for your help.
> Here is the output from command (pcs config show)
>
> [root at lb1 ~]# pcs config show
> Cluster Name: LB.STK
> Corosync Nodes:
>
> Pacemaker Nodes:
> lb1.asol.local lb2.asol.local
>
> Resources:
> Group: LB
> Resource: LAN.VIP (class=ocf provider=heartbeat type=IPaddr2)
> Attributes: ip=172.16.139.113 cidr_netmask=24 nic=eth1
> Operations: monitor interval=15s (LAN.VIP-monitor-interval-15s)
> Resource: WAN.VIP (class=ocf provider=heartbeat type=IPaddr2)
> Attributes: ip=172.16.139.110 cidr_netmask=24 nic=eth0
> Operations: monitor interval=15s (WAN.VIP-monitor-interval-15s)
> Resource: OPENVPN (class=lsb type=openvpn)
> Operations: monitor interval=20s (OPENVPN-monitor-interval-20s)
> start interval=0s timeout=20s (OPENVPN-start-timeout-20s)
> stop interval=0s timeout=20s (OPENVPN-stop-timeout-20s)
>
> Stonith Devices:
> Fencing Levels:
>
> Location Constraints:
> Ordering Constraints:
> Colocation Constraints:
>
> Cluster Properties:
> cluster-infrastructure: cman
> dc-version: 1.1.10-14.el6_5.1-368c726
> stonith-enabled: false
>
>
> When I start cluster after reboot of both nodes, everythings looks fine.
> But when shoot command "pcs resource delete OPENVPN" from node lb1 in
> the log starts to popup these lines:
> Jan 15 13:56:37 corosync [TOTEM ] Retransmit List: 202
> Jan 15 13:57:08 corosync [TOTEM ] Retransmit List: 202 203
> Jan 15 13:57:38 corosync [TOTEM ] Retransmit List: 202 203 204
> Jan 15 13:58:08 corosync [TOTEM ] Retransmit List: 202 203 204 206
> Jan 15 13:58:38 corosync [TOTEM ] Retransmit List: 202 203 204 206 208
> Jan 15 13:59:08 corosync [TOTEM ] Retransmit List: 202 203 204 206 208 209
>
> I also noticed, that these retransmit entries starts to appear even
> after some time (7 minutes) from fresh cluster start without doing any
> change or manipulation with cluster.
there exists multicast issues on virtual nodes - therefore your bridged network
will for sure not operate reliable out of the box for HA setups.
try
echo 1 > /sys/class/net/YOURDEVICE/bridge/multicast_querier
--
LF
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