Configuring the host to run failover

The SUSE Linux Enterprise Server host requires configuration changes to run failover. The failover solution uses DM-MP.

Before you begin

You have installed the required packages on your system.
For Red Hat (RHEL) hosts, verify the packages are installed by running rpm -q device-mapper-multipath
For SLES hosts, verify the packages are installed by running rpm -q multipath-tools

About this task

By default, DM-MP is disabled in RHEL and SLES. Complete the following steps to enable DM-MP components on the host.

Procedure

Add the NVMe E-Series device entry to the devices section of the /etc/multipath.conf file, as shown in the following example:

devices {
        device {
                vendor "NVME"
                product "NetApp E-Series*"
                path_grouping_policy group_by_prio
                failback immediate
                no_path_retry 30
        }
}

Configure multipathd to start at system boot.
```
# systemctl enable multipathd
```
Start multipathd if it is not currently running.
```
# systemctl start multipathd
```
Verify the status of multipathd to make sure it is active and running:
```
# systemctl status multipathd
```