Are you using san with emc powerpath?
drbd service start on boot?
start drbd by hand and give the command ls -l *dev/drbd/by-res/r0/1 and ls
-l *
*dev/drbd/by-res/r0/0*
2013/8/27 Goutam Baul <goutam.b...@rp-sg.in>
> Dear List,****
>
> ** **
>
> We have configured DRBD 8.4.3 (community version) in the sense that we are
> able to manually start DRBD at both the nodes, make nodes primary or
> secondary and data is getting replicated between the primary and the
> secondary node. We are doing this for our postfix mail server. The drbd
> configuration file is****
>
> ** **
>
> resource r0 {****
>
> startup {****
>
> wfc-timeout 1;****
>
> degr-wfc-timeout 2;****
>
> }****
>
> volume 0 {****
>
> device /dev/drbd1;****
>
> disk /dev/emcpowera2;****
>
> meta-disk /dev/emcpowera5;****
>
> }****
>
> volume 1 {****
>
> device /dev/drbd2;****
>
> disk /dev/emcpowera3;****
>
> meta-disk /dev/emcpowera6;****
>
> }****
>
> on drmail1.cesc.co.in {****
>
> address 10.50.4.14:7789;****
>
> }****
>
> on drbdtest2.cesc.co.in {****
>
> address 10.50.81.253:7789;****
>
> }****
>
> }****
>
> ** **
>
> We want to run postfix mailing system on a RHCS cluster suite for high
> availability. The mail-store and the mail-queue of postfix will be on the
> DRBD setup so that they are replicated from our data center to our disaster
> recovery site. The cluster.conf is as follows:****
>
> ** **
>
> <?xml version="1.0"?>****
>
> <cluster config_version="27" name="dr-mail">****
>
> <fence_daemon clean_start="1" post_join_delay="30"/>****
>
> <clusternodes>****
>
> <clusternode name="drmail1.cesc.co.in" nodeid="1">****
>
> <fence>****
>
> <method name="Method1_drac">****
>
> <device name="fence_drac1"/>****
>
> </method>****
>
> ** **
>
> </fence>****
>
> </clusternode>****
>
> <clusternode name="drmail2.cesc.co.in" nodeid="2">****
>
> <fence>****
>
> <method name="Method1_drac">****
>
> <device name="fence_drac2"/>****
>
> </method>****
>
> ** **
>
> </fence>****
>
> </clusternode>****
>
> </clusternodes>****
>
> <cman expected_votes="1" two_node="1"/>****
>
> <fencedevices>****
>
> <fencedevice agent="fence_drac5" cmd_prompt="admin1->"
> ipaddr="10.50.4.22" login="root" module_name="fence_drac1"
> name="fence_drac1" passwd="calvin" secure="on"/>****
>
> <fencedevice agent="fence_drac5" cmd_prompt="admin1->"
> ipaddr="10.50.4.23" login="root" module_name="fence_drac2"
> name="fence_drac2" passwd="calvin" secure="on"/>****
>
> ** **
>
> </fencedevices>****
>
> <rm>****
>
> <failoverdomains>****
>
> <failoverdomain name="dr_mail" nofailback="0"
> ordered="1" restricted="1">****
>
> <failoverdomainnode name="
> drmail1.cesc.co.in" priority="1"/>****
>
> <failoverdomainnode name="
> drmail2.cesc.co.in" priority="2"/>****
>
> </failoverdomain>****
>
> </failoverdomains>****
>
> <resources>****
>
> <ip address="10.50.4.20" monitor_link="on"
> sleeptime="10"/>****
>
> <drbd name="drbd-mail" resource="r0">****
>
> <fs device="/dev/drbd/by-res/r0/0"
> force_unmount="1" fsid="61850" mountpoint="/home" fstype="ext3"
> name="drbd-mailstore" options="noatime"/>****
>
> <fs device="/dev/drbd/by-res/r0/1"
> force_unmount="1" fsid="61855" mountpoint="/var/spool/postfix"
> fstype="ext3" name="drbd-spool" options="noatime"/>****
>
> </drbd>****
>
> <script file="/etc/init.d/postfix" name="postfix"
> />****
>
> </resources>****
>
> <service domain="dr_mail" name="mail" recovery="relocate">
> ****
>
> <ip ref="10.50.4.20"/>****
>
> <drbd ref="drbd-mail" />****
>
> <script ref="postfix" />****
>
> </service>****
>
> </rm>****
>
> </cluster>****
>
> ** **
>
> If we run this RHCS cluster, we get the error in the log as ****
>
> ** **
>
> *Aug 27 17:38:19 drmail1 rgmanager[4695]: drbd not found in
> /proc/modules. Do you need to modprobe?*
>
> * *
>
> If we run the RHCS cluster after issuing the modprobe drbd command we get
> the following message****
>
> ** **
>
> *1: Failure: (127) Device minor not allocated*
>
> *additional info from kernel:*
>
> *unknown minor*
>
> *Command 'drbdsetup role 1' terminated with exit code 10*
>
> *<debug> DRBD resource r0 already configured*
>
> *DRBD resource r0 already configured*
>
> *Start of mail complete*
>
> * *
>
> But the DRBD service is not starting up and therefore the corresponding
> devices are not being created. Thus the log file returns the error****
>
> ** **
>
> *Aug 27 17:38:33 drmail1 rgmanager[5147]: stop: Could not match
> /dev/drbd/by-res/r0/1 with a real device*
>
> *Aug 27 17:38:33 drmail1 rgmanager[5166]: stop: Could not match
> /dev/drbd/by-res/r0/0 with a real device*
>
> ** **
>
> We have built the DRBD rpm files from the source using rpmbuild and copied
> the drbd.sh.rhcs and drbd.metadata.rhcs files from the script folder of the
> source to the /usr/share/cluster folder as drbd.sh and drbd.metadata
> respectively. We are using RHEL 6.1 (64 bit).****
>
> ** **
>
> Any help please.****
>
> ** **
>
> With regards,****
>
> ** **
>
> Goutam****
>
> ** **
>
> ** **
>
> ** **
>
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> https://www.redhat.com/mailman/listinfo/linux-cluster
>
--
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