Centos Cluster / Iscsi San 22.07.08
I have three colocated servers that I need some work performed on. I have 2 new nics ports available on each server (eth2,eth3), which already have the corrected IP’s assigned, are on the right vlan, and firewalls have been correctly setup. These two nics on each server will be used to connect to my iscsi san (dell md3000i), which has a single controller, but two iscsi ports and will be using a multi pathing driver to distribute the connections between the nics. I already have the iscsi initiators setup and connected to the iscsi san.
Here is a tutorial that explains things in detail, but since its a bitter harder for someone like me that is not as savy with this sort of setup, to understand it. I am running Centos 5.2 on each one of these servers, with the Cluster Suite
http://lists.centos.org/pipermail/centos/2008-June/101774.html
Here is another that might be helpful:
http://translate.google.com/translate?u=http%3A%2F%2Fpeng1.org%2Felwiki%2Findex.php%3Ftitle%3DEL5_MD3000i&sl=de&tl=en&hl=en&ie=UTF-8
I seem to have some issues with CLVMD not wanting to play nicely from time to time. I am getting things to work sometimes, but not all the time, which is the part that concerns me the most since I cant have those type of issues after i go production. Basically when CLVMD is not coming online correctly (seems to stall when trying to start the service),
To sum things up:
1) Need multi pathing driver configured so that im taking full advantage of the two available ports on the san and servers for iscsi.
2) When members of the cluster (the 3 servers) are rebooted, they ALWAYS join the cluster again. I seem to have inconsistencies between the nodes.
3) Test and reconfigure if needed, CLVMD so that it always works when servers are brought back on line if its (server or service) restarted.
3a) Once this server is running on all 3 servers correctly, it should then enable access to the shared iscsi volume group (already setup).
The quicker this can be setup configured, the better. If things work out really well, i most likely will want to keep your contact details handy so that I can hire you for future work on the cluster.
If you have questions, please do not hesitate to ask. Please do not bid on this project unless you have experience working on centos clusters and iSCSI.
