[Samba] How to reach partially online state in ctdb cluster

[Sabuj Pattanayek]

Well, I'm using 1.0.114 from sernet and there's a strange bug that's
causing it to come up in a partially online state unless I manually
setifacelink up the bond that it thinks it's down even when it's up,
basically the same as this problem :

https://lists.samba.org/archive/samba-technical/2012-June/084899.html

I have three servers each with two bonds that are made up of 2 eth/em links
each. For some reason on the 3rd server which I recently added ctdb always
thinks that one of the bonds is down even when it's not so it comes up in a
partially online state until I ctdb setifacelink linkName up.

So to get yourself into a partially online state I would do the following :

Setup one or more of the servers to be on two different subnets/vlans and
in your ctdb configuration have the same number of vip's as you do subnets
per server. So if you have 3 servers that each sit on two subnets, make
sure you have at least 6 total vip's, 3 per subnet. Then to get yourself
into a partially online state one of the servers, ip link set $if down .
Then the vip that used to be on that $if will migrate to another server
where a similar interface on the same subnet exists leaving the other
server with a down $if in a partially online state,



On Wed, Sep 24, 2014 at 4:51 AM, Surabhi Bhalothia <
surabhi.bhalothia at gmail.com> wrote:

> Hi,
>
> I am testing CTDB failover cases. For one of my test case I need to
> bring one of the nodes to partially online state .
> Looking for  help with the configuration that needs to be done to reach
> to this state.
>
> Thanks,
> Surabhi
>
> NOTE: I am testing CTDB2.5 version
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