ctdb - public ip is assigned to us but not on an interface - error

[Martin Schwenke]

On Wed, 25 Jan 2017 20:11:03 +0000, lejeczek <peljasz at yahoo.co.uk>
wrote:

> Cluster runs on Centos 7.x
> I believe it worked with distro's ctdb-4.4.4-9.el7.x86_64.
> Now when it fails it is ctdb-4.4.4-12.el7_3.x86_64.
> It loops forever:
> 
> 2017/01/25 20:09:43.763947 [recoverd:17247]: Trigger takeoverrun
> 2017/01/25 20:09:43.765976 [recoverd:17247]: Takeover run 
> starting
> 2017/01/25 20:09:43.777047 [17145]: Takeover of IP 
> 10.5.10.51/28 on interface eth0
> 2017/01/25 20:09:45.360099 [recoverd:17247]: Takeover run 
> completed successfully
> 2017/01/25 20:09:45.371403 [recoverd:17247]: Public IP 
> '10.5.10.51' is assigned to us but not on an interface
> 2017/01/25 20:09:45.371436 [recoverd:17247]: Trigger takeoverrun
> 2017/01/25 20:09:45.371824 [recoverd:17247]: Takeover run 
> starting
> 2017/01/25 20:09:45.372434 [17145]: Takeover of IP 
> 10.5.10.51/28 on interface eth0
> 2017/01/25 20:09:47.136951 [recoverd:17247]: Takeover run 
> completed successfully
> 2017/01/25 20:09:47.152961 [recoverd:17247]: Public IP 
> '10.5.10.51' is assigned to us but not on an interface
> 2017/01/25 20:09:47.152987 [recoverd:17247]: Trigger takeoverrun
> 2017/01/25 20:09:47.154833 [recoverd:17247]: Takeover run 
> starting
> 2017/01/25 20:09:47.156935 [17145]: Takeover of IP 
> 10.5.10.51/28 on interface eth0

It might be worth seeing the changelog for the RPM to see what has
changed, since it is actually the same CTDB version, perhaps with
distro patches on top.

The other thing to check is whether the IP address is actually on the
interface.   If not, are you able to add it using:

  ip addr add 10.5.10.51/28 dev eth0

or similar?

If CTDB can't add it then there should be an error from the
10.interface event script... but we're not seeing an error.

The relevant code has seen some improvement in recent versions but I
don't remember it failing like this...

peace & happiness,
martin