[DRBD-user] Understanding "classic" 3 node set up.

Paul O'Rorke paul at tracker-software.com
Wed Feb 7 16:52:16 CET 2018

Oh my!!!!

2 weeks of missing that typo and frustration.  Thank you both Yannis and 
Peter.  Peter, I thought you were pointing out the answer to my question 
- which file is it failing to find.  I normally copy the .res file to 
ensure they are always identical, and it was correct on nodes 1 and 2....

I really appreciate the help guys, it all makes sense now.  I was 
worried that I had a serious misunderstanding in what I was doing.

    root at trk-kvm-01:~# cat /proc/drbd
    version: 8.4.5 (api:1/proto:86-101)
    srcversion: 4B3E2E2CD48CAE5280B5205

    12: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r-----
         ns:4764 nr:0 dw:10719324 dr:21194772 al:1676 bm:0 lo:0 pe:0
    ua:0 ap:0 ep:1 wo:f oos:0
    120: cs:SyncSource ro:Primary/Secondary ds:UpToDate/Inconsistent A
         ns:19642880 nr:0 dw:0 dr:19645043 al:0 bm:0 lo:0 pe:0 ua:0 ap:0
    ep:1 wo:f oos:32782648
         [======>.............] sync'ed: 37.5% (32012/51196)M
         finish: 0:12:39 speed: 43,136 (38,896) K/sec


    root at trk-kvm-03:/media/scratch# drbd-overview
    120:convirt-U/0  SyncTarget Secondary/Primary Inconsistent/UpToDate
         [=======>............] sync'ed: 44.8% (28312/51196)M

Makes me very happy!

*Paul O'Rorke*
*Tracker Software Products (Canada) Limited *
www.tracker-software.com <http://www.tracker-software.com/>
Tel: +1 (250) 324 1621
Fax: +1 (250) 324 1623


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On 2018-02-07 04:22 AM, Yannis Milios wrote:
> Did you fixed the typo that Peter mentioned on his last post ? That 
> should be "internal" and not "inetrnal". Then must copy the resource 
> file on all 3 nodes.
>>> >>  meta-disk       inetrnal; 
> After fixing that you should be able to create the metadata and 
> initialize  the stacked device by:
> On trk-kvm-01 (assuming that this is the primary node):
> drbdadm create-md --stacked convirt-U
> On trk-kvm-03:
> drbdadm create-md convirt-U    #this will create the required metadata 
> on the underlying device (i.e /dev/trk-kvm-03-vg/convirt). No need to 
> transfer metadata manually from trk-kvm-01)
> On trk-kvm-01:
> drbdadm --stacked adjust convirt-U
> On trk-kvm-03:
> drbdadm adjust convirt-U
> On trk-kvm-01:
> drbdadm --stacked -- --overwrite-data-of-peer primary convirt-U
> cat /proc/drbd
> Y

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