GFS2 Cluster in VMware

From Linux NFS

VMware

• bought a copy of VMware Workstation 6, installed it on my T-43 Thinkpad "atro"(running openSuSE 10.2, 2GB of RAM).
• made a new virtual machine: OS: Linux, Version: "Other Linux 2.6.x kernel", Networking: Bridged, Disk: 4GB, split into 2GB files, RAM: 256MB
• installed Fedora 8 in it -- even X worked well with only 256MB of RAM(!) -- guest is named "fatsuit"
• yum-installed gfs2-utils and libvolume_id-devel (i also tried cman, cman-devel, openais, openais-devel, and lvm2-cluster, but even they were out-of-date with the stock Fedora kernel, and so are also too old for the pNFS kernels)
• downloaded and installed device-mapper-1.02.22, openais-0.80.3, cluster-2.01.00, and lvm2-2.02.28

ATA over Ethernet (for guest "cluster" shared storage)

• yum-installed AoE initiator (client) aoetools-18-1 on fatsuit
• downloaded AoE target (server) vblade-15.tgz and installed it on atro
• i set aside a spare partition on atro to export as a block device over AoE
  • [atro] $ sudo ln -s /dev/sda6 /dev/AoE
  • [atro] $ sudo vbladed 0 1 eth0 /dev/AoE (major dev num 0, minor 1)
  • added the following to /etc/fstab so i can access the data from both host and guest OSes:
    • /dev/AoE /mnt/AoE ext3 noauto,acl,user_xattr 1 1
  • [fatsuit] $ sudo modprobe aoe
    • .. AoE discovers all exported devices on the LAN; mine was the only one, and immediately appeared as /dev/etherd/e0.1. Mounting it "just worked"; props to AoE!

LVM and GFS2 setup

• prep physical volume for LVM:
  • [fatsuit] $ sudo pvcreate -M 2 /dev/etherd/e0.1
• create the volume group GuestVolGroup and add all of the AoE "device" to it:
  • [fatsuit] $ sudo vgcreate -M 2 -s 1m -c y GuestVolGroup /dev/etherd/e0.1
• edit /etc/lvm/lvm.conf and make sure to set locking_type to DLM
• before further stuff can proceed, the cluster needs to be up and clvmd needs to be running everywhere. So, in VMware I cloned fatsuit twice: as hagbard and wingnut.
• edit /etc/cluster.conf and name the cluster GuestCluster and set up the three nodes with manual (read: ignored) fencing.
• bring up the cluster:
  • $ pdsh -w fatsuit,hagbard,wingnut sudo service cman start && pdsh -w fatsuit,hagbard,wingnut sudo service clvmd start
• create the logical volume GuestVolume and assign the full volume group to it:
  • [fatsuit] $ sudo lvcreate -n GuestVolume -l 100%VG
• .. and make a GFS2 fs therein:
  • [fatsuit] $ sudo gfs2_mkfs -j 3 -p lock_dlm -t GuestCluster:GuestFS /dev/GuestVolGroup/GuestVolume
• restart the daemons, then mount and your VMware GFS2 cluster should be good to go! :)