[Pacemaker] Best Practice Flush Pacemaker Config / Troubvleshooting unknown error

[Andrew Beekhof]

On Fri, Jun 11, 2010 at 12:59 PM, Koch, Sebastian
<Sebastian.Koch at netzwerk.de> wrote:
> Hi,
>
>
>
> currently i am trying to deploy my already running 2 node active/passive
> LAMP Cluster to physical machines. I got several problems while importing
> the config and therefore i often need to fully flush the pacemaker config
> and top aste my edited version. Pacemaker always complains that the resource
> is running, which is a safe and correct behaviour. Would like to know if
> there is a fast way to flush config and import new one without stopping all
> resource and so on.

Just change whatever you need to.
Any resource that was untouched will not be restarted.

Or, if you must, run:
   crm configure property is-managed-default=false
   crm configure erase

then import the new config.

> And my second question is how i can troubleshoot unknown erros. When i try
> to start my drbd resource it just says unknown error. I am able to mount it
> by hand ist a XFS Filesystem with underlying LVM.
>
>
>
> Normally i troubleshoot like this:
>
>
>
> 1.       Crm_mon
>
> 2.       Tail –fn 100 /var/log/syslog

100 is probably too low.
grep for the resource name instead.

>
> 3.       Crm_verify –LV
>
>
>
> Does somebody have a advise how to troubleshoot this tricky errors?
>
>
>
>
>
> Crm configure show
>
>
>
> node pilot01-node1 \
>
>         attributes standby="off"
>
> node pilot01-node2 \
>
>         attributes standby="off"
>
> primitive drbd_pilot0 ocf:linbit:drbd \
>
>         params drbd_resource="pilot0" \
>
>         operations $id="drbd_pilot0-operations" \
>
>         op monitor interval="60"
>
> primitive pinggw ocf:pacemaker:pingd \
>
>         params host_list="10.1.1.162" multiplier="200" \
>
>         op monitor interval="10"
>
> primitive res_Apache lsb:apache2 \
>
>         operations $id="res_Apache-operations" \
>
>         op monitor interval="15" timeout="20" start-delay="15" \
>
>         meta target-role="Started" is-managed="true"
>
> primitive res_ClusterIP ocf:heartbeat:IPaddr2 \
>
>         params iflabel="ClusterIP" ip="10.1.1.12" \
>
>         operations $id="res_ClusterIP_1-operations" \
>
>         op monitor interval="10" start-delay="0"
>
> primitive res_Filesystem ocf:heartbeat:Filesystem \
>
>         params fstype="xfs" directory="/mnt/cluster" device="/dev/drbd0" \
>
>         operations $id="res_Filesystem-operations" \
>
>         op monitor interval="20" start-delay="0"
>
> primitive res_MySQL lsb:mysql \
>
>         operations $id="res_MySQL-operations" \
>
>         op monitor interval="15" timeout="60" start-delay="15"
>
> group grp_MySQL res_Filesystem res_ClusterIP res_MySQL res_Apache \
>
>         meta target-role="Started"
>
> ms ms_drbd_mysql0 drbd_pilot0 \
>
>         meta master-max="1" master-node-max="1" clone-max="2"
> clone-node-max="1" notify="true"
>
> clone cl-pinggw pinggw \
>
>         meta globally-unique="false"
>
> location cli-prefer-grp_MySQL grp_MySQL \
>
>         rule $id="cli-prefer-rule-grp_MySQL" inf: #uname eq pilot01-node2
>
> location drbd-fence-by-handler-ms_drbd_mysql0 ms_drbd_mysql0 \
>
>         rule $id="drbd-fence-by-handler-rule-ms_drbd_mysql0" $role="Master"
> -inf: #uname ne pilot01-node1
>
> location grp_MySQL-with-pinggw grp_MySQL \
>
>         rule $id="grp_MySQL-with-pinggw-rule-1" -inf: not_defined pingd or
> pingd lte 0
>
> colocation col_drbd_on_mysql inf: grp_MySQL ms_drbd_mysql0:Master
>
> order mysql_after_drbd inf: ms_drbd_mysql0:promote grp_MySQL:start
>
> property $id="cib-bootstrap-options" \
>
>         expected-quorum-votes="3" \
>
>         stonith-enabled="false" \
>
>         no-quorum-policy="ignore" \
>
>         dc-version="1.0.8-2c98138c2f070fcb6ddeab1084154cffbf44ba75" \
>
>         cluster-infrastructure="openais" \
>
>         last-lrm-refresh="1274352045" \
>
>         symmetric-cluster="true" \
>
>         default-action-timeout="120s"
>
> rsc_defaults $id="rsc-options" \
>
>         resource-stickiness="100"
>
>
>
>
>
> cat /proc/drbd
>
>
>
> cat /proc/drbd
>
> version: 8.3.7 (api:88/proto:86-91)
>
> GIT-hash: ea9e28dbff98e331a62bcbcc63a6135808fe2917 build by
> root at prolog01-pilot1, 2010-06-07 17:34:47
>
>  0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r----
>
>     ns:0 nr:0 dw:0 dr:72 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0
>
>
>
> cat /etc/drbd.d/pilot.res
>
>
>
> resource pilot0 {
>
>
>
>
>
> syncer {
>
>         rate 125M;
>
> }
>
>         device    /dev/drbd0;
>
>         disk      /dev/cluster/block0;
>
>         meta-disk internal;
>
>
>
>         on pilot01-node1 {
>
>                 address   192.168.100.1:7789;
>
>         }
>
>
>
>         on pilot01-node2 {
>
>                 address   192.168.100.2:7789;
>
>         }
>
>
>
>         disk {
>
>                 fencing resource-only;
>
>         }
>
>
>
>         handlers {
>
>                 fence-peer "/usr/lib/drbd/crm-fence-peer.sh";
>
>                 after-resync-target "/usr/lib/drbd/crm-unfence-peer.sh";
>
>         }
>
> }
>
>
>
>
>
>
>
> Thanks in advance.
>
> Best Regards
>
>
>
> Sebastian Koch
>
>
> _______________________________________________
> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
>
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs:
> http://developerbugs.linux-foundation.org/enter_bug.cgi?product=Pacemaker
>
>