[ClusterLabs] big trouble with a DRBD resource

[Kristián Feldsam]

here is nice guide how to configure drbd, clvm...

http://marcitland.blogspot.cz/2013/04/building-using-highly-available-esos.html

S pozdravem Kristián Feldsam
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> On 6 Aug 2017, at 12:05, Kristoffer Grönlund <kgronlund at suse.com> wrote:
> 
> "Lentes, Bernd" <bernd.lentes at helmholtz-muenchen.de> writes:
> 
>> Hi,
>> 
>> first: is there a tutorial or s.th. else which helps in understanding what pacemaker logs in syslog and /var/log/cluster/corosync.log ?
>> I try hard to find out what's going wrong, but they are difficult to understand, also because of the amount of information.
>> Or should i deal more with "crm histroy" or hb_report ?
> 
> I like to use crm history log to get the logs from all the nodes in a
> single flow, but it depends quite a bit on configuration what gets
> logged where..
> 
>> 
>> What happened:
>> I tried to configure a simple drbd resource following http://clusterlabs.org/doc/en-US/Pacemaker/1.1-plugin/html-single/Clusters_from_Scratch/index.html#idm140457860751296
>> I used this simple snip from the doc:
>> configure primitive WebData ocf:linbit:drbd params drbd_resource=wwwdata \
>>    op monitor interval=60s
> 
> I'll try to sum up the issues I see, from a glance:
> 
> * The drbd resource is a multi-state / master-slave resource, which is
>  technically a variant of a clone resource where different clones can
>  either be in a primary or secondary state. To configure it correctly,
>  you'll need to create a master resource as well. Doing this with a
>  single command is unfortunately a bit painful. Either use crm
>  configure edit, or the interactive crm mode (with a verify / commit
>  after creating both the primitive and the master resources).
> 
> * You'll need to create monitor operations for both the master and slave
>  roles, as you note below, and set explicit timeouts for all
>  operations.
> 
> * Make sure the wwwdata DRBD resource exists, is accessible from both
>  nodes, and is in a good state to begin with (that is, not
>  split-brained).
> 
> I would recommend following one of the tutorials provided by Linbit
> themselves which show how to set this stuff up correctly, since it is
> quite a bit involved.
> 
>> Btw: is there a history like in the bash where i see which crm command i entered at which time ? I know that crm history is mighty, but didn't find that.
> 
> We don't have that yet :/ If you're not in interactive mode, your bash
> history should have the commands though.
> 
>> no backup - no mercy
> 
> lol ;)
> 
> Cheers,
> Kristoffer
> 
> -- 
> // Kristoffer Grönlund
> // kgronlund at suse.com
> 
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