On 5/4/19 5:09 am, JCA wrote:
I believe that you are right in your assessment. Unfortunately, after
this I seem to be stuck in a situation in which both nodes are not
connected through DRBD:
In A:
# cat /proc/drbd
version: 8.4.11-1 (api:1/proto:86-101)
GIT-hash: 66145a308421e9c124ec391a7848ac20203bb03c build by
mockbuild@, 2018-11-03 01:26:55
1: cs:WFConnection ro:Primary/Unknown ds:UpToDate/DUnknown C r-----
ns:0 nr:0 dw:4 dr:2161 al:1 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:336
# drbdadm status
my-data role:Primary
disk:UpToDate
peer connection:Connecting
In B:
# cat /proc/drbd
version: 8.4.11-1 (api:1/proto:86-101)
GIT-hash: 66145a308421e9c124ec391a7848ac20203bb03c build by
mockbuild@, 2018-11-03 01:26:55
1: cs:WFConnection ro:Secondary/Unknown ds:UpToDate/DUnknown C r-----
ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:24
# drbdadm status
my-data role:Secondary
disk:UpToDate
peer connection:Connecting
I have tried numerous things - including rebooting both VMs where the
nodes live - to no avail.
Sounds like both sides have been a primary and so now they both think
the other is out of date (ie, split brain). What you will need to do is
tell DRBD which one should discard it's data and become secondary, you
can then reconnect them and DRBD will re-copy the data, re-sync, and get
back into a working state.
This is a good lesson to work out why you ended up with a split brain
situation it sounds like:
1. server A was up while server B was down
2. server A went down, and then server B came up
3. server A then came up without any valid network connection to server B
or, you have a non-standard or incorrect config. DRBD (in my experience)
would notice, catch, and prevent you from getting into this situation.
You should also refer to your log files, they will contain lots of
useful information, as well as details that you should post to the list
so we can see what mess you have created....
Hope it helps..
Regards,
Adam
--
Adam Goryachev Website Managers www.websitemanagers.com.au
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