Configuring NFS with separate storage
Use this configuration to put all the storage resources into a separate service group. The storage resources such as Mount and DiskGroup are part of different service group. In this configuration, the NFS share service group depends on the storage service group. SFCFSHA uses this configuration where the service group containing the storage resources is a parallel service group.
Creating the NFS service group
This service group contains an NFS resource. Depending on the service group's use, it can also contain a NIC resource and a Phantom resource.
To create the NFS service group
- Configure a separate parallel service group (nfs_grp).
- Set the value of the AutoStart and Parallel attributes to 1 for the service group.
- The value for the AutoStartList must contain the list of all the cluster nodes in the service group.
- Configure an NFS resource (nfs) inside this service group. You can also put NIC resource in this service group to monitor a NIC. You must create a Phantom resource in this service group to display the correct state of the service group.
Note: |
You must set NFSLockFailover to 1 for NFSRestart resource if you intend to use NFSv4. |
Creating the NFS storage service group
This service group can contain a DiskGroup resource and a Mount resource; or an LVMVolumeGroup resource and a Mount resource.
To create the NFS storage service group
- If you configure the backing store for the NFS exports with VxVM, create DiskGroup and Mount resources for the mount point that you want to export.
- If the backing store for the NFS exports is configured using LVM, configure the LVMVolumeGroup resource plus the Mount resource for the mount point that you want to export.
Refer to Storage agents chapter in the Cluster Server Bundled Agents Reference Guide for details.
Creating the NFS exports service group
This service group contains the Share resource and IP resource for exports. The value for the PathName attribute for the Share resource must be on shared storage and it must be visible to all nodes in the cluster.
To create the NFS exports service group
- Create an online local hard dependency between this service group and the storage service group.
- Create an NFS Proxy resource inside the service group. This Proxy resource points to the actual NFS resource that is configured on the system.
- Create an NFSRestart resource. Set the Lower attribute of this NFSRestart resource to 1. Ensure that NFSRes attribute points to the NFS resource that is configured on the system. For NFS lock recovery, make sure that the NFSLockFailover attribute and the LocksPathName attribute have appropriate values. The NFSRestart resource gets rid of preonline and postoffline triggers for NFS.
- Create a Share resource. Set the value of the PathName attribute to the mount point that you want to export. In case of multiple shares, create multiple Share resources with different values for their PathName attributes. All the Share resources configured in the service group need to have dependency on the NFSRestart resource that has a value of 1 for the Lower attribute.
- Create an IP resource. The value of the Address attribute for this IP resource is used to mount the NFS exports on the client systems. Make the IP resource depend on the Share resources that are configured in the service group.
- Create a DNS resource if you want to use NFS lock recovery. The DNS resource depends on the IP resource. Refer to the sample configuration on how to configure the DNS resource.
- Create an NFSRestart resource. Set the NFSRes attribute to the NFS resource (nfs) that is configured on the system. Set the Lower attribute of this NFSRestart resource to 0. To use lock recovery, make the NFSRestart resource depend on the IP resource or the DNS resource.
Note: |
Ensure that all attributes except the Lower attribute are identical for the two NFSRestart resources. |
