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InfoScale™ 9.0 Storage Foundation and High Availability Configuration and Upgrade Guide - Solaris

Last Published: 2025-04-21

Product(s): InfoScale & Storage Foundation (9.0)

Platform: Solaris

Modifying VCS configuration to use I/O fencing

After you configure I/O fencing, add the UseFence = SCSI3 cluster attribute to the VCS configuration file /etc/VRTSvcs/conf/config/main.cf.

If you reset this attribute to UseFence = None, VCS does not make use of I/O fencing abilities while failing over service groups. However, I/O fencing needs to be disabled separately.

To modify VCS configuration to enable I/O fencing

Save the existing configuration:
```
# haconf -dump -makero
```
Stop VCS on all nodes:
```
# hastop -all
```
To ensure High Availability has stopped cleanly, run gabconfig -a.
In the output of the commans, check that Port h is not present.
If the I/O fencing driver vxfen is already running, stop the I/O fencing driver.
```
# svcadm disable -t vxfen
```

Make a backup of the main.cf file on all the nodes:

# cd /etc/VRTSvcs/conf/config
# cp main.cf main.orig

On one node, use vi or another text editor to edit the main.cf file. To modify the list of cluster attributes, add the UseFence attribute and assign its value as SCSI3.
```
cluster clus1(
UserNames = { admin = "cDRpdxPmHpzS." }
Administrators = { admin }
HacliUserLevel = COMMANDROOT
CounterInterval = 5
UseFence = SCSI3
)
```
For fencing configuration in any mode except the disabled mode, the value of the cluster-level attribute UseFence is set to SCSI3.
Save and close the file.
Verify the syntax of the file /etc/VRTSvcs/conf/config/main.cf:
```
# hacf -verify /etc/VRTSvcs/conf/config
```
Using rcp or another utility, copy the VCS configuration file from a node (for example, sys1) to the remaining cluster nodes.
For example, on each remaining node, enter:
```
# rcp sys1:/etc/VRTSvcs/conf/config/main.cf \
/etc/VRTSvcs/conf/config
```
Start the I/O fencing driver and VCS. Perform the following steps on each node:
- Start the I/O fencing driver.
  The vxfen startup script also invokes the vxfenconfig command, which configures the vxfen driver.
- Start VCS on the node where main.cf is modified.
```
# /opt/VRTS/bin/hastart
```
- Start VCS on all other nodes once VCS on first node reaches RUNNING state.
```
# /opt/VRTS/bin/hastart 
```