Multi-IP NFS Backup target mapping file configuration

Introduction

Filename and location:

triliovault-cfg-scripts/common/triliovault_nfs_map_input.yml

This file exclusively comes into play when users aim to configure Trilio with a NFS backup target that employs multiple network endpoints. For all other scenarios, such as single IP NFS or S3, this file remains inactive, and in such instances, please consult the standard installation documentation.

When using an NFS backup target with multiple network endpoints, T4O will mount a single IP/endpoint on a designated compute node for a specific NFS share. This approach enables users to distribute NFS share IPs/endpoints across various compute nodes.

The 'triliovault_nfs_map_input.yml' file allows users to distribute/load balance NFS share endpoints across compute nodes in a given cloud.

Note: Two IPs/endpoints of the same NFS share on a single compute node is an invalid scenario and not required because in the backend it stores data at the same place.

Examples

Using hostnames

Here, the User has ‘one’ NFS share exposed with three IP addresses. 192.168.1.34, 192.168.1.35, 192.168.1.33 Share directory path is: /var/share1

So, this NFS share supports the following full paths that clients can mount:

192.168.1.33:/var/share1 
192.168.1.34:/var/share1 
192.168.1.35:/var/share1

There are 32 compute nodes in the OpenStack cloud. 30 node hostnames have the following naming pattern

prod-compute-1.trilio.demo 
prod-compute-2.trilio.demo 
prod-compute-3.trilio.demo 
. 
. 
. 
prod-compute-30.trilio.demo

The remaining 2 node hostnames do not follow any format/pattern.

compute_bare.trilio.demo 
compute_virtual

Now the mapping file will look like this

multi_ip_nfs_shares: 
 - "192.168.1.34:/var/share1": ['prod-compute-[1:10].trilio.demo', 'compute_bare.trilio.demo'] 
   "192.168.1.35:/var/share1": ['prod-compute-[11:20].trilio.demo', 'compute_virtual'] 
   "192.168.1.33:/var/share1": ['prod-compute-[21:30].trilio.demo'] 

single_ip_nfs_shares: []

Using IPs

Compute node IP range used here: 172.30.3.11-40 and 172.30.4.40, 172.30.4.50 Total of 32 compute nodes

multi_ip_nfs_shares: 
 - "192.168.1.34:/var/share1": ['172.30.3.[11:20]', '172.30.4.40'] 
   "192.168.1.35:/var/share1": ['172.30.3.[21:30]', '172.30.4.50'] 
   "192.168.1.33:/var/share1": ['172.30.3.[31:40]'] 

single_ip_nfs_shares: []

Other complex examples are available on github at triliovault-cfg-scripts/common/examples-multi-ip-nfs-map at master · trilioData/triliovault-cfg-scripts

Getting the correct compute hostnames/IPs

RHOSP

Use the following command to get compute hostnames. Check the ‘Name' column. Use these exact hostnames in 'triliovault_nfs_map_input.yml' file.

In the following command output, ‘overcloudtrain1-novacompute-0' and ‘overcloudtrain1-novacompute-1' are correct hostnames.

Run this command on undercloud by sourcing 'stackrc'.

(undercloud) [stack@ucqa161 ~]$ openstack server list
+--------------------------------------+-------------------------------+--------+----------------------+----------------+---------+
| ID                                   | Name                          | Status | Networks             | Image          | Flavor  |
+--------------------------------------+-------------------------------+--------+----------------------+----------------+---------+
| 8c3d04ae-fcdd-431c-afa6-9a50f3cb2c0d | overcloudtrain1-controller-2  | ACTIVE | ctlplane=172.30.5.18 | overcloud-full | control |
| 103dfd3e-d073-4123-9223-b8cf8c7398fe | overcloudtrain1-controller-0  | ACTIVE | ctlplane=172.30.5.11 | overcloud-full | control |
| a3541849-2e9b-4aa0-9fa9-91e7d24f0149 | overcloudtrain1-controller-1  | ACTIVE | ctlplane=172.30.5.25 | overcloud-full | control |
| 74a9f530-0c7b-49c4-9a1f-87e7eeda91c0 | overcloudtrain1-novacompute-0 | ACTIVE | ctlplane=172.30.5.30 | overcloud-full | compute |
| c1664ac3-7d9c-4a36-b375-0e4ee19e93e4 | overcloudtrain1-novacompute-1 | ACTIVE | ctlplane=172.30.5.15 | overcloud-full | compute |
+--------------------------------------+-------------------------------+--------+----------------------+----------------+---------+