[Linux-cluster] Two node Cluster

[Flavio Junior]

You need to change locking_type into /etc/lvm/lvm.conf

And you MUST config a fencing method.

--

Flávio do Carmo Júnior aka waKKu

2009/2/18 Sreejith K <sreejithemk at gmail.com>:
> Hi,
>
> I want to setup a two node cluster using cman. here are the steps I followed
>
> =========================================
> Cluster nodes: node1 & node2
> =========================================
>
> [root at node1 ~]# cman_tool status
> Version: 6.1.0
> Config Version: 5
> Cluster Name: k7
> Cluster Id: 269
> Cluster Member: Yes
> Cluster Generation: 48
> Membership state: Cluster-Member
> Nodes: 2
> Expected votes: 1
> Total votes: 2
> Quorum: 1
> Active subsystems: 8
> Flags: 2node Dirty
> Ports Bound: 0 11
> Node name: node1
> Node ID: 2
> Multicast addresses: 239.192.1.14
> Node addresses: 10.10.10.40
>
> [root at node2 ~]# cman_tool status
> Version: 6.1.0
> Config Version: 5
> Cluster Name: k7
> Cluster Id: 269
> Cluster Member: Yes
> Cluster Generation: 48
> Membership state: Cluster-Member
> Nodes: 2
> Expected votes: 1
> Total votes: 2
> Quorum: 1
> Active subsystems: 8
> Flags: 2node Dirty
> Ports Bound: 0 11
> Node name: node2
> Node ID: 1
> Multicast addresses: 239.192.1.14
> Node addresses: 10.10.10.39
>
> =========================================
> Logical volumes on node node1
> =========================================
>
> /dev/vg1/lvol0 formatted as GFS
>
> [root at node1 ~]#gfs_mkfs -p lock-dlm -t k7:CLVM0 -j 2 /dev/vg1/lvol0
> [root at node1 ~]#mkfs -t gfs -p lock-dlm -t k7:CLVM0 -j 2 /dev/vg1/lvol0
>
> =========================================
> Procedures on node node1
> =========================================
>
> [root at node1 ~]# service cman start
> Starting cluster:
>    Enabling workaround for Xend bridged networking... done
>    Loading modules... done
>    Mounting configfs... done
>    Starting ccsd... done
>    Starting cman... done
>    Starting daemons... done
>    Starting fencing... done
>                                                            [  OK  ]
> [root at node1 ~]# service clvmd start
> Starting clvmd:                                            [  OK  ]
> Activating VGs:   1 logical volume(s) in volume group "vg1" now active
>
>
>   Error locking on node node2: Command timed out
>                                                            [  OK  ]
> [root at node1 ~]# gnbd_serv -n
> gnbd_serv: startup succeeded
> [root at node1 ~]# gnbd_export -c -e gnbd1 -d /dev/vg1/lvol0
> gnbd_export: created GNBD gnbd1 serving file /dev/vg1/lvol0
> [root at node1 ~]# mount /dev/vg1/lvol0 /mnt/gfs_local/
> [root at node1 ~]# cd /mnt/gfs_local/
> [root at node1 gfs_local]# ls
> fence.css   mantisbt-1.1.6.tar.gz     vkarmalicense.lic
> JMeter.pdf  mysql-cheat-sheet-v1.pdf
> [root at node1 gfs_local]#
>
>
> =========================================
> Procedures on node node2
> =========================================
> [root at node2 ~]# service cman start
> Starting cluster:
>    Enabling workaround for Xend bridged networking... done
>    Loading modules... done
>    Mounting configfs... done
>    Starting ccsd... done
>    Starting cman... done
>    Starting daemons... done
>    Starting fencing... done
>                                                            [  OK  ]
> [root at node2 ~]# service clvmd start
> Starting clvmd:                                            [  OK  ]
> [root at node2 ~]# gnbd_serv -n
> gnbd_serv: startup succeeded
> [root at node2 ~]# gnbd_import -i 10.10.10.40
> [root at node2 ~]# mount /dev/gnbd/gnbd1 -o lockproto=lock_dlm /mnt/gfs_gnbd/
> [root at node2 ~]# cd /mnt/gfs_gnbd/
> [root at node2 gfs_gnbd]# ls
> fence.css   mantisbt-1.1.6.tar.gz     vkarmalicense.lic
> JMeter.pdf  mysql-cheat-sheet-v1.pdf
>
> My /etc/cluster/cluster.conf is
>
> <?xml version="1.0"?>
> <cluster config_version="5" name="k7">
>     <fence_daemon post_fail_delay="0" post_join_delay="3"/>
>     <clusternodes>
>         <clusternode name="node2" nodeid="1" votes="1">
>             <fence/>
>         </clusternode>
>         <clusternode name="node1" nodeid="2" votes="1">
>             <fence/>
>         </clusternode>
>     </clusternodes>
>     <cman expected_votes="1" two_node="1"/>
>     <fencedevices/>
>     <rm>
>         <failoverdomains>
>             <failoverdomain name="node2" ordered="0" restricted="0">
>                 <failoverdomainnode name="node1" priority="1"/>
>             </failoverdomain>
>             <failoverdomain name="node1">
>                 <failoverdomainnode name="node2" priority="1"/>
>             </failoverdomain>
>         </failoverdomains>
>         <resources/>
>     </rm>
> </cluster>
>
> Why do the message "Error locking on node node2: Command timed out" pops up
> every time ?
> Can a cluster be created without specifying fencing and all that stuff ? I
> just wanted to use GFS over a clustered environment.....
>
> Sreejith K
> K 7 - C O M P U T I N G
> www.k7computing.com
>
>
>
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