Revision as of 07:24, 1 April 2009

RedHat/Centos shared storage example

Consider the drawing below. The WEB-servers run Centos 5.2 and share the redundant data from the shared storage.

• Each WEB server has access to the same data from the shared storage calles NAS - Network Attached Storage.
• The WEB-servers has Read/Write access to the NAS.
• Locking of files open for writing is necessary.

Gigabit ethernet SAN/Cluster løsning

The shared Storage

Two servers with each two drives are installed with FreeNAS The drives are exported as iSCSI targets.

RedHat/Centos WEB servers

The WEB servers all run Centos 5.2 and use the the FreeNAS servers for application data.

• Make a cluster with membernodes.
• On one system do the following
  1. Install iSCSI initiator software on the WEB-servers, if not present.
     1. Attach the logical drives to the system
  2. Create a Volume Group with mirror
  3. Create a logical Volume
  4. Create a GFS filesystem
• On all the Clusternodes
  1. Install iSCSI initiator software on the WEB-servers, if not present.
     1. Attach the logical drives to the system
  2. Make a mountppoint
  3. Mount the Logical Volume (GFS Filesystem)