RB PI for third node

[mir]

I have applied a RPI 3 as a third node for quorum-only to my cluster and it has been running stable for 3 weeks. I therefore consider it ready to release install instruction into the wild

Step guide:

0) Login as root on your Pi
1) Install Debian Jessie (Standard system utilities and SSH server)
2) echo "deb http://ftp.debian.org/debian jessie-backports main contrib" > /etc/apt/sources.list.d/jessie-backports.list
3) gpg --keyserver pgpkeys.mit.edu --recv-key 7638D0442B90D010 && gpg -a --export 7638D0442B90D010 | apt-key add -
4) gpg --keyserver pgpkeys.mit.edu --recv-key 8B48AD6246925553 && gpg -a --export 8B48AD6246925553 | apt-key add -
5) apt-get update
6) apt-get -t jessie-backports install corosync
7) sed -i 's/without-password/yes/' /etc/ssh/sshd_config && systemctl restart ssh
8) scp <ip of pve node>:/etc/corosync/* /etc/corosync
9) add new node under nodelist in /etc/corosync.conf (copy one of the current and adjust)
10) for NODE in <ip of pve node 1> <ip of pve node 2>; do
      scp /etc/corosync/corosync.conf $NODE:/etc/corosync
   done
11) ssh <ip of pve node 1> systemctl restart corosync
12) ssh <ip of pve node 2> systemctl restart corosync
13) systemctl start corosync
14) run corosync-quorumtool to check all three nodes er registret as online and that there is quorum: Quorate:          Yes

pve-manager is missing so don't add to /etc/pve/corosync.conf.

PS. if new node is added pve-manager will overwrite /etc/corosync/corosync.conf
PPS. I give no guaranty so everything above is at your own risk.

 

[Belokan]

Nice how-to !

I have it working as well for few days (RPI1B) but I've finally chosen the "real PVE 3rd node" based on VM solution (using phpvirtualbox hosted on a NAS) which provides me more options to validate PM updates, test packages, secured by snapshots.

 

[bolek2000]

I installed corosync 2.3.5 under Ubuntu 16.04 32bit on old laptop and configured like in the howto. On all nodes i see

Quorum information
------------------
Date: Sat Apr 1 23:41:16 2017
Quorum provider: corosync_votequorum
Nodes: 3
Node ID: 3
Ring ID: 112
Quorate: Yes

Votequorum information
----------------------
Expected votes: 3
Highest expected: 3
Total votes: 3
Quorum: 2
Flags: Quorate

Membership information
----------------------
Nodeid Votes Name
1 1 192.168.35.10
2 1 192.168.35.20
3 1 192.168.35.30 (local)

When I login to the PVE4.4 WebUI the 3rd node is shown as offline. Can I get this status to online somehow ?

 

[Belokan]

Hello,

No, with corosync configured, you just have a running cluster member used for quorum. But for pve the node is not online as no pve process are actually started.

If you want to have a 'running' lightweight node, you need to go down the virtual pve path and install a full pve instance on a vm.
And this has to be done outside of your two physical nodes of course for obvious reason.

Cheers