As I mentioned in Openfiler posts, until I can expose a block device within the Xen VM, using ASM to manage the files won’t be happening.
So rather than spin my wheels I have been setting up a NFS server to share the 147 Gig mountpoint /mnt as the shared disk.
Essentially this is the first part of the Oracle RAC on NFS guide. When I wanted a more indepth guide to setting up NFS Server and NFS clients I used this NFS HOWTO.
So I fired up my trusty CentOS 4 base install, got the necessary packages installed, made a hack to get a service running without the sunrpc module and bingo, the NFS server is ready for the next stage of the Oracle RAC build.
- Install nmap and nfs-utils: yum install nmap nfs-utils
- Add all the hostnames to /etc/hosts as it makes it easy to have all the config files using those names rather than hardcoded IP addresses.
- To get around the nasty missing sunrpc module when you start NFS use this forum post essentially comment out the exit 1 in this line /sbin/modprobe sunrpc #|| exit 1 in the file /etc/inint.d/rpcidmapd
- Add this line rpc_pipefs /var/lib/nfs/rpc_pipefs rpc_pipefs defaults 0 0 to /etc/fstab on the NFS server.
- Always run exportfs -rav so you can get a verbose output for the directories which are going to be shared via NFS
- nmap `hostname` is your friend for determining which ports to open from within ec2 security groups.
- rpcinfo -p hostname will tell you whether everything is setup and ready to go.
The other benefit of course like the Openfiler, is that I now can spawn a NFS server node to provide extra storage for Oracle RAC and whatever else needs it, for example a shared backup location for temporary Oracle RMAN backups for practicing building Standby databases using RMAN Duplicate command.