[ClusterLabs] Ubuntu 16.04 - 2 node setup

[James Booth]

Hey guys,


Apologies for burdening you with my issue, but I'm at my wits' end!


I'm trying to set up a 2-node cluster on two Ubuntu 16.04 VMs. I actually had this working earlier, but because I had tweaked a number of different settings (both corosync related and external settings), I reverted my VMs back to an earlier checkpoint to ensure I wasn't just running off a luck 'magic config' and I could replicate my setup... turns out, I can't!


The config for nodes is as follows:


```

totem {
  version: 2
  cluster_name: swarm
  transport: udpu
  interface {
    ringnumber: 0
    bindnetaddr: 10.172.0.0
  }
}

nodelist {
  node {
    ring0_addr: 10.172.0.81
    name: SWARM01
    nodeid: 1
  }
  node {
    ring0_addr: 10.172.0.82
    name: SWARM02
    nodeid: 2
  }
}

quorum {
  provider: corosync_votequorum
  two_node: 1
}

logging {
  to_logfile: yes
  to_syslog: yes
  logfile: /var/log/corosync/corosync.log
  timestamp: on
}
```



This time around, when I first run corosync with `systemctl start corosync` it comes up using 127.0.0.1.


Apr 12 20:28:37 SWARM01 corosync[6025]:   [TOTEM ] Initializing transmit/receive security (NSS
Apr 12 20:28:37 SWARM01 corosync[6025]:   [TOTEM ] The network interface [127.0.0.1] is now up
Apr 12 20:28:37 SWARM01 corosync[6025]:   [QB    ] server name: cmap
Apr 12 20:28:37 SWARM01 corosync[6025]:   [QB    ] server name: cfg
Apr 12 20:28:37 SWARM01 corosync[6025]:   [QB    ] server name: cpg
Apr 12 20:28:37 SWARM01 corosync[6025]:   [QB    ] server name: votequorum
Apr 12 20:28:37 SWARM01 corosync[6025]:   [QB    ] server name: quorum
Apr 12 20:28:37 SWARM01 corosync[6025]:   [TOTEM ] A new membership (127.0.0.1:4) was formed.

Results from `sudo corosync-quorumtool`

Quorum information
------------------
Date:             Wed Apr 12 20:31:12 2017
Quorum provider:  corosync_votequorum
Nodes:            1
Node ID:          2130706433
Ring ID:          4
Quorate:          No

Votequorum information
----------------------
Expected votes:   2
Highest expected: 2
Total votes:      1
Quorum:           2 Activity blocked
Flags:

Membership information
----------------------
    Nodeid      Votes Name
2130706433          1 localhost (local)

And results from `sudo corosync-cmapctl | grep members`
runtime.totem.pg.mrp.srp.members.2130706433.config_version (u64) = 0
runtime.totem.pg.mrp.srp.members.2130706433.ip (str) = r(0) ip(127.0.0.1)
runtime.totem.pg.mrp.srp.members.2130706433.join_count (u32) = 1
runtime.totem.pg.mrp.srp.members.2130706433.status (str) = joined

It's also not using the correct node number (Should be 1 or 2 depending on which node I try it on). Then if I try to restart the service, it just fails and doesn't log anything in /var/log/corosync/corosync.log.

Apr 12 20:52:01 SWARM01 systemd[1]: Starting Corosync Cluster Engine...
Apr 12 20:52:01 SWARM01 systemd[1]: corosync.service: Main process exited, code=exited, status=8/n/a
Apr 12 20:52:01 SWARM01 systemd[1]: Failed to start Corosync Cluster Engine.
Apr 12 20:52:01 SWARM01 systemd[1]: corosync.service: Unit entered failed state.
Apr 12 20:52:01 SWARM01 systemd[1]: corosync.service: Failed with result 'exit-code'.

The only way I can get to test this again is by completely removing corosync (apt remove --purge corosync), reinstalling and trying again. I've tried disabling the firewall completely to see if that was interfering, but to me, it's as if corosync isn't respecting my config file this time around?

Any guidance at all would be greatly appreciated!




James Booth
Senior ICT Technician
Email: james.booth at primarytec.co.uk
Mobile: +44 07725817464

[http://www.primarytec.co.uk/wp-content/uploads/2016/11/signature.png]

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