- lxd: 5.19-8635f82
- microovn: 22.03.3+snap1d18f95c73
root@cont-82qTvb4Qf3:~# snap list
Name Version Rev Tracking Publisher Notes
core 16-2.60.4 16202 latest/stable canonical✓ core
core22 20231123 1033 latest/stable canonical✓ base
hello-world 6.4 29 latest/stable canonical✓ -
lxd 5.19-8635f82 26200 latest/stable canonical✓ -
microovn 22.03.3+snap1d18f95c73 349 22.03/stable canonical✓ -
I have a 4node microovn cluster.But my ovn-central service is not HA.
the central service is running on three of my microovn node.just like below:
root@cont-82qTvb4Qf3:~# microovn cluster list
+-----------------+--------------------+----------+------------------------------------------------------------------+--------+
| NAME | ADDRESS | ROLE | FINGERPRINT | STATUS |
+-----------------+--------------------+----------+------------------------------------------------------------------+--------+
| cont-82qTvb4Qf3 | 10.136.92.6:6443 | stand-by | 41af4abd3a760dc50761875365ed6ab8be2db7fe9867eda13d19cb470dfe4b9c | ONLINE |
+-----------------+--------------------+----------+------------------------------------------------------------------+--------+
| cont-Hj0wcbTOM7 | 10.136.92.250:6443 | voter | d8ebb9a55ddfb087c2137b8c53f2bba197691af9ac25959871444f8329f82dfd | ONLINE |
+-----------------+--------------------+----------+------------------------------------------------------------------+--------+
| cont-muKFMThP95 | 10.136.92.7:6443 | voter | 76043e6eda26000402827ead8448d527f7e9fe8d11798295b4504eb7acc42108 | ONLINE |
+-----------------+--------------------+----------+------------------------------------------------------------------+--------+
| cont-vxaZiAXEE3 | 10.136.92.8:6443 | voter | 19163069826cc9cb3102416c393ea2e446dcbe6324347d380d2f09fd2ad8bc9d | ONLINE |
+-----------------+--------------------+----------+------------------------------------------------------------------+--------+
and
root@cont-82qTvb4Qf3:~# microovn status
MicroOVN deployment summary:
- cont-82qTvb4Qf3 (10.136.92.6)
Services: central, chassis, switch
- cont-Hj0wcbTOM7 (10.136.92.250)
Services: central, chassis, switch
- cont-muKFMThP95 (10.136.92.7)
Services: central, chassis, switch
- cont-vxaZiAXEE3 (10.136.92.8)
Services: chassis, switch
root@cont-82qTvb4Qf3:~#
I use snap stop microovn on node cont-82qTvb4Qf3 with central service.
and as you can see, central service is not running on node cont-vxaZiAXEE3.
To maintain ha, I thought a new central service would appear at node cont-vxaZiAXEE3.But it didn’t happen.
May I ask if there is a mechanism in place，ensure that the central service maintains 3 cluster members at all times？
I will have 10 microovn nodes in the future.I hope that even if some nodes go down, the central service will still be available.
What command can be used to run central service on a microovn node?
Or is there any automated way to maintain the cluster of central services?