> For the complete documentation index, see [llms.txt](https://docs.trilio.io/openstack/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.trilio.io/openstack/t4o-5.x/upgrading-to-t4o-5.x-from-older-supported-versions/upgrading-on-rhosp.md).

# Upgrading on RHOSP

## 1] Prerequisites

Please ensure the following requirements are met before starting the upgrade process:

* No Snapshot or Restore is running
* Global job scheduler is disabled
* wlm-cron is disabled on the Trilio Appliance

#### Deactivating the wlm-cron service

The following sets of commands will disable the wlm-cron service and verify that it is has been completely shutdown.

```
[root@TVM2 ~]# pcs resource disable wlm-cron
[root@TVM2 ~]# systemctl status wlm-cron
● wlm-cron.service - workload's scheduler cron service
   Loaded: loaded (/etc/systemd/system/wlm-cron.service; disabled; vendor preset                                                                                                                                                                                                                                                                                                                                                           : disabled)
   Active: inactive (dead)

Jun 11 08:27:06 TVM2 workloadmgr-cron[11115]: 11-06-2021 08:27:06 - INFO - 1...t
Jun 11 08:27:07 TVM2 workloadmgr-cron[11115]: 140686268624368 Child 11389 ki...5
Jun 11 08:27:07 TVM2 workloadmgr-cron[11115]: 11-06-2021 08:27:07 - INFO - 1...5
Jun 11 08:27:07 TVM2 workloadmgr-cron[11115]: Shutting down thread pool
Jun 11 08:27:07 TVM2 workloadmgr-cron[11115]: 11-06-2021 08:27:07 - INFO - S...l
Jun 11 08:27:07 TVM2 workloadmgr-cron[11115]: Stopping the threads
Jun 11 08:27:07 TVM2 workloadmgr-cron[11115]: 11-06-2021 08:27:07 - INFO - S...s
Jun 11 08:27:07 TVM2 workloadmgr-cron[11115]: All threads are stopped succes...y
Jun 11 08:27:07 TVM2 workloadmgr-cron[11115]: 11-06-2021 08:27:07 - INFO - A...y
Jun 11 08:27:09 TVM2 systemd[1]: Stopped workload's scheduler cron service.
Hint: Some lines were ellipsized, use -l to show in full.
[root@TVM2 ~]# pcs resource show wlm-cron
 Resource: wlm-cron (class=systemd type=wlm-cron)
  Meta Attrs: target-role=Stopped
  Operations: monitor interval=30s on-fail=restart timeout=300s (wlm-cron-monito                                                                                                                                                                                                                                                                                                                                                           r-interval-30s)
              start interval=0s on-fail=restart timeout=300s (wlm-cron-start-int                                                                                                                                                                                                                                                                                                                                                           erval-0s)
              stop interval=0s timeout=300s (wlm-cron-stop-interval-0s)
[root@TVM2 ~]# ps -ef | grep -i workloadmgr-cron
root     15379 14383  0 08:27 pts/0    00:00:00 grep --color=auto -i workloadmgr                                                                                                                                                                                                                                                                                                                                                           -cron

```

## 2] Install latest Trilio release

Please follow [this documentation](/openstack/t4o-5.x/deployment/installing-on-rhosp.md) to install the latest Trilio release.

## 3] Enable mount-bind for NFS

{% hint style="info" %}
This step would be needed only when your backup target is NFS and if you are upgrading from T4O 4.1 or older releases.
{% endhint %}

T4O has changed the calculation of the mount point from 4.2 release onwards.\
It is necessary to set up the mount-bind to make T4O 4.1 or older backups available for T4O 4.2

Please follow [this documentation](/openstack/t4o-5.x/upgrading-to-t4o-5.x-from-older-supported-versions/enabling-tvo-4.1-or-older-backups-when-using-nfs-backup-target.md) to set up the mount bind for RHOSP.

## 4] Enable Global Job Scheduler

After the upgrade, global job scheduler would be disabled. You can enable that either through UI or CLI.

### 4.1] Through UI

Login to the Dashboard and go to Admin -> Backups-Admin -> Settings tab and check the 'Job Scheduler Enabled' checkbox. By clicking the 'Change' button you can enable the Global Job Scheduler.

### 4.2] Through CLI

Login to the any WLM container, create and source the admin rc file.\
Execute the enable the global job scheduler cli.

```
$ podman exec -itu root triliovault_wlm_api /bin/bash
$ source admin.rc
$ workloadmgr enable-global-job-scheduler
Global job scheduler is successfully enabled
```

## 5] Import old workloads existing on the Backup Target

Workload import allows importing Workloads existing on the Backup Target into the Trilio database.

Please follow [this documentation](/openstack/t4o-5.x/admin-guide/workload-import-and-migration.md) to import the Workloads.