# Trilio for RHV 4.2 Release Notes

## Trilio for RHV is now End Of Life

Trilio for RHV 4.2 was the last release from Trilio due to Red Hat Enterprise Virtualization being under Red Hat's Extended Life Phase. Support provided by Trilio is limited and follows Red Hat's support stance as shown below.

RHV 4.4 Support Status: <https://access.redhat.com/support/policy/updates/rhev>

| Date            | Stage of life                              |
| --------------- | ------------------------------------------ |
| August 4, 2020  | General availability                       |
| August 31, 2022 | End of full support                        |
| August 31, 2024 | End of Maintenance support                 |
| August 31, 2026 | End of extended life phase and general EOL |

## Release Information

Trilio 4.2 is the sixth and release of Trilio for Red Hat Virtualization.

It is aimed to provide Backup and Recovery for Red Hat Virtualization 4.3.x & 4.4.x.\
The full requirements can be found [here](https://docs.trilio.io/rhv/deployment-guide/requirements).

## Trilio for RHV 4.1 Features on a Glance

| Backup                          | Recovery          | Additional functions |
| ------------------------------- | ----------------- | -------------------- |
| Image based VMs (iSCSI and NFS) | OneClick Restore  | File Search          |
| Template based VMs (iSCSI)      | Selective Restore | File Recovery        |
| Scheduled based Backup          | InPlace Restore   | Workload import      |
| OnDemand Backup                 |                   | Workload reset       |
|                                 |                   | RestFul API          |
|                                 |                   | Reporting            |
|                                 |                   | Alerting             |
|                                 |                   | RBAC                 |

## New Architecture

Trilio for RHV 4.2 is no longer using the VM Appliance which was provided in earlier versions of TVR.

TVR 4.2 has been fully containerized and is running on top of a Kubernetes Cluster.

TVR 4.2 installation procedure consumes prepared RHEL8 machines and deploys the Kubernetes Cluster together with the TVR 4.2 containers.

## High-availability for Trilio Controller services

The change in architecture turns the Trilio Controller services into a high-available solution, which is running with as many TrilioVault containers as there are Kubernetes nodes available.

In case of a container going down will the Kubernetes cluster automatically detect the loss and spins up a new pod.

In case of a complete node loss, a new node can be added and the Kubernetes cluster will automatically deploy the Trilio controller pods on the new node.

## Known issues

#### NFSv4 not supported

TVR 4.1 is not supporting NFSv4. Backups taken using NFSv4 will fail with I/O errors.

Workaround is to enforce the usage of NFSv3 by adding `vers=3` as NFS option.

#### Clicking download file multiple times after a file search creates error messages in wlm-api logs

It is possible to download smaller files directly after a file search. When the user is clicking the download button multiple times without waiting for the download window to appear the wlm-api logs are flooded with error messages.

#### TVR transfer daemon can be installed on RHV Manager

It is possible to accidently run the installation of the TVR daemon, that is supposed to run on the RHV Hosts only, against the RHV Manager.

The installation will succeed and backups might fail with the following error:

`error while converting qcow2: Could not create file: Numerical result out of range\n'`

#### Snapshot mount UI timing out on directories with over 100.000 files inside

It has been observed that while navigating through mounted Snapshots inside the RHV Manager the UI freezes when directories are accessed, which contain more than 100.000 files.

This might be observed with less files or much more files depending on the transfer speed between TrilioVault appliance and backup target.

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