Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi Dennis,
Thanks for the reply.
As far my understanding I need a ordering constraint which will sense the
drbd primary and then will allow webserver_fs to start mounting and a
colocation constraint which make sure all resource
(webserver,virtual_ip, webserver_data_sync
,webserver_fs ) to run in master node.
But it pity after hours of head scratch and memorizing documentation I am
unable to phrase those lines. May be it too much too ask, but would you
please write those constraints for me.
Regards,
JAE
On Fri, Jun 26, 2015 at 8:56 PM, Dennis Jacobfeuerborn <
dennisml at conversis.de> wrote:
> On 26.06.2015 12:42, JA E wrote:
> > Hi,
> >
> > I am newbie to clustering. I managed to setup cluster with
> > pacemaker,corosysnc, drbd and pcs in two nodes. But after test restart of
> > both node it seems drbd can't mount the desired folder when controlled by
> > pacemaker, manually it's fine.
> >
> >
> >> *[root at master Desktop]# pcs config*
> >> *Cluster Name: cluster_web*
> >> *Corosync Nodes:*
> >> * master slave *
> >> *Pacemaker Nodes:** master slave *
> >>
> >> *Resources: *
> >> * Resource: virtual_ip (class=ocf provider=heartbeat type=IPaddr2)*
> >> * Attributes: ip=192.168.73.133 cidr_netmask=32 *
> >> * Operations: start interval=0s timeout=20s
> >> (virtual_ip-start-timeout-20s)*
> >> * stop interval=0s timeout=20s
> (virtual_ip-stop-timeout-20s)*
> >> * monitor interval=30s (virtual_ip-monitor-interval-30s)*
> >> * Resource: webserver (class=ocf provider=heartbeat type=apache)*
> >> * Attributes: configfile=/etc/httpd/conf/httpd.conf
> >> statusurl=http://localhost/server-status <
> http://localhost/server-status> *
> >> * Operations: start interval=0s timeout=40s
> (webserver-start-timeout-40s)*
> >> * stop interval=0s timeout=60s
> (webserver-stop-timeout-60s)*
> >> * monitor interval=1min (webserver-monitor-interval-1min)*
> >> * Master: webserver_data_sync*
> >> * Meta Attrs: master-max=1 master-node-max=1 clone-max=2
> clone-node-max=1
> >> notify=true *
> >> * Resource: webserver_data (class=ocf provider=linbit type=drbd)*
> >> * Attributes: drbd_resource=drbd0 *
> >> * Operations: start interval=0s timeout=240
> >> (webserver_data-start-timeout-240)*
> >> * promote interval=0s timeout=90
> >> (webserver_data-promote-timeout-90)*
> >> * demote interval=0s timeout=90
> >> (webserver_data-demote-timeout-90)*
> >> * stop interval=0s timeout=100
> >> (webserver_data-stop-timeout-100)*
> >> * monitor interval=60s
> (webserver_data-monitor-interval-60s)*
> >> * Resource: webserver_fs (class=ocf provider=heartbeat type=Filesystem)*
> >> * Attributes: device=/dev/drbd0 directory=/var/www/html fstype=ext3 *
> >> * Operations: start interval=0s timeout=60
> >> (webserver_fs-start-timeout-60)*
> >> * stop interval=0s timeout=60
> (webserver_fs-stop-timeout-60)**
> >> monitor interval=20 timeout=40
> >> (webserver_fs-monitor-interval-20)*
> >>
> >> *Stonith Devices: **Fencing Levels: *
> >>
> >> *Location Constraints:*
> >> * Resource: webserver*
> >> * Enabled on: node01 (score:50) (id:location-webserver-node01-50)*
> >> * Enabled on: master (score:50) (id:location-webserver-master-50)*
> >> *Ordering Constraints:*
> >> * start virtual_ip then start webserver (kind:Mandatory)
> >> (id:order-virtual_ip-webserver-mandatory)*
> >> * start webserver_fs then start webserver (kind:Mandatory)
> >> (id:order-webserver_fs-webserver-mandatory)*
> >> *Colocation Constraints:*
> >> * webserver with virtual_ip (score:INFINITY)
> >> (id:colocation-webserver-virtual_ip-INFINITY)** webserver_fs with
> >> webserver_data_sync (score:INFINITY) (with-rsc-role:Master)
> >> (id:colocation-webserver_fs-webserver_data_sync-INFINITY)*
> >>
> >> *Cluster Properties:*
> >> * cluster-infrastructure: corosync*
> >> * cluster-name: cluster_web*
> >> * dc-version: 1.1.12-a14efad*
> >> * have-watchdog: false*
> >> * no-quorum-policy: ignore** stonith-enabled: false*
> >>
> >>
> >
> >>
> >> *[root at master Desktop]# drbdadm dump*
> >> *# /etc/drbd.conf*
> >> *global {*
> >> * usage-count yes;*
> >> * cmd-timeout-medium 600;*
> >> * cmd-timeout-long 0;**}*
> >>
> >> *common {*
> >> * net {*
> >> * protocol C;*
> >> * }**}*
> >>
> >> *# resource drbd0 on master: not ignored, not stacked*
> >> *# defined at /etc/drbd.d/drbd0.res:1*
> >> *resource drbd0 {*
> >> * on master {*
> >> * volume 0 {*
> >> * device /dev/drbd0 minor 0;*
> >> * disk /dev/vg_drbd0/lv_drbd0;*
> >> * meta-disk internal;*
> >> * }*
> >> * address ipv4 192.168.73.131:7789
> >> <http://192.168.73.131:7789/>;*
> >> * }*
> >> * on slave {*
> >> * volume 0 {*
> >> * device /dev/drbd0 minor 0;*
> >> * disk /dev/vg_drbd0/lv_drbd0;*
> >> * meta-disk internal;*
> >> * }*
> >> * address ipv4 192.168.73.132:7789
> >> <http://192.168.73.132:7789/>;*
> >> * }**}*
> >>
> >>
> >
> >>
> >> *[root at master Desktop]# pcs status*
> >> *Cluster name: cluster_web*
> >> *Last updated: Fri Jun 26 03:04:18 2015*
> >> *Last change: Fri Jun 26 02:13:11 2015*
> >> *Stack: corosync*
> >> *Current DC: master (1) - partition with quorum*
> >> *Version: 1.1.12-a14efad*
> >> *2 Nodes configured**5 Resources configured*
> >>
> >> *Online: [ master slave ]*
> >> *Full list of resources:*
> >>
> >> * virtual_ip (ocf::heartbeat:IPaddr2): Started master *
> >> * webserver (ocf::heartbeat:apache): Stopped *
> >> * Master/Slave Set: webserver_data_sync [webserver_data]*
> >> * Masters: [ master ]*
> >> * Slaves: [ slave ]** webserver_fs (ocf::heartbeat:Filesystem):
> >> Stopped *
> >>
> >> *Failed actions:*
> >> * webserver_fs_start_0 on master 'unknown error' (1): call=23,
> >> status=complete, exit-reason='Couldn't mount filesystem /dev/drbd0 on
> >> /var/www/html', last-rc-change='Fri Jun 26 02:20:45 2015', queued=0ms,
> >> exec=87ms** webserver_fs_start_0 on slave 'unknown error' (1):
> >> call=23, status=complete, exit-reason='Couldn't mount filesystem
> /dev/drbd0
> >> on /var/www/html', last-rc-change='Fri Jun 26 02:20:45 2015',
> queued=0ms,
> >> exec=79ms*
> >>
> >>
> >> *PCSD Status:*
> >> * master: Online** slave: Online*
> >>
> >> *Daemon Status:*
> >> * corosync: active/enabled*
> >> * pacemaker: active/enabled** pcsd: active/enabled*
> >
> >
> > cat /proc/drbd
> >> version: 8.4.6 (api:1/proto:86-101)
> >> GIT-hash: 833d830e0152d1e457fa7856e71e11248ccf3f70 build by
> phil at Build64R7,
> >> 2015-04-10 05:13:52
> >> 0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r-----
> >> ns:0 nr:0 dw:0 dr:216 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
> >
> >
> > I know it might be a silly configuration issue but would be a great help.
>
> Hi,
> I've only skimmed the configuration but what I noticed is that there
> seems to be no order constraint that says that the filesystem should be
> mounted after one of the drbd peers has transitioned to the Master role.
> I suspect that Pacemaker tries to mount the filesystem before the
> corresponding drbd resource has been set to primary.
>
> Also I only see two colocation rules that tie the webserver with the
> virtual_ip and the webserver_fs with the webserver_data_sync but none
> that tells pacemaker to run the ip or webserver on the same system where
> webserver_fs is running. So according to this configuration it would be
> valid to run ip and webserver on one node and drbd primary and
> webserver_fs on the other.
>
> Regards,
> Dennis
>
>
> _______________________________________________
> drbd-user mailing list
> drbd-user at lists.linbit.com
> http://lists.linbit.com/mailman/listinfo/drbd-user
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20150627/c4b2ab4c/attachment.htm>