[ClusterLabs] Corosync ring marked as FAULTY

Denis Gribkov dun at itsts.net
Tue Feb 21 12:26:33 EST 2017

Hi Everyone.

I have 16-nodes asynchronous cluster configured with Corosync redundant 
ring feature.

Each node has 2 similarly connected/configured NIC's. One NIC connected 
to the public network,

another one to our private VLAN. When I checked Corosync rings 
operability I found:

# corosync-cfgtool -s
Printing ring status.
Local node ID 1
         id      =
         status  = Marking ringid 0 interface FAULTY
         id      =
         status  = ring 1 active with no faults

After some time of digging into I identified that if I enable back the 
failed ring with command:

# corosync-cfgtool -r

RING ID 0 will be marked as "active" for few minutes, but after it 
marked permanently as faulty.

Log has no any useful info, just single message:

corosync[21740]:   [TOTEM ] Marking ringid 0 interface FAULTY

And no any message like:

[TOTEM ] Automatically recovered ring 1

My corosync.conf looks like:

compatibility: whitetank

totem {
         version: 2
         secauth: on
         threads: 4
         rrp_mode: passive

         interface {

                 member {
                         memberaddr: PRIVATE_IP_1


                 member {
                         memberaddr: PRIVATE_IP_16

                 ringnumber: 0
                 bindnetaddr: PRIVATE_NET_ADDR
                 mcastport: 5505
                 ttl: 1

        interface {

                 member {
                         memberaddr: PUBLIC_IP_1

                 member {
                         memberaddr: PUBLIC_IP_16

                 ringnumber: 1
                 bindnetaddr: PUBLIC_NET_ADDR
                 mcastport: 5405
                 ttl: 1

         transport: udpu

logging {
         to_stderr: no
         to_logfile: yes
         logfile: /var/log/cluster/corosync.log
         logfile_priority: info
         to_syslog: yes
         syslog_priority: warning
         debug: on
         timestamp: on

I had tried to change rrp_mode, mcastaddr/mcastport for ringnumber: 0, 
but result was the similar.

I checked multicast/unicast operability using omping utility and didn't 
found any issues.

Also no errors on our private VLAN was found for network equipment.

Why Corosync decided to disable permanently second ring? How I can debug 
the issue?

Other properties:

Corosync Cluster Engine, version '1.4.7'

Pacemaker properties:
  cluster-infrastructure: cman
  cluster-recheck-interval: 5min
  dc-version: 1.1.14-8.el6-70404b0
  expected-quorum-votes: 3
  have-watchdog: false
  last-lrm-refresh: 1484068350
  maintenance-mode: false
  no-quorum-policy: ignore
  pe-error-series-max: 1000
  pe-input-series-max: 1000
  pe-warn-series-max: 1000
  stonith-action: reboot
  stonith-enabled: false
  symmetric-cluster: false

Thank you.

Regards Denis Gribkov

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