iland is constantly working on maintaining and enhancing the backend infrastructure to provide our customers with stability, security and new functionality. If you are reading this article, chances are that you have a DRaaS with Zerto environment at iland and you have been asked to update your local installation of Zerto Virtual Replication (ZVR). This may be necessary in case iland plans to update to a major ZVR release. Zerto provides compatibility within one major release in both directions which means that when iland is running version 7.0, for example, you can have versions 6.5 to 7 installed locally. Hence, when the update schedule to version 7.5 is announced, you will need to start planning your update if you are on version 6.5 as this will fall out of scope.
Additionally, you might be asked by our support team to update your local installation due to some bug fixes or patches. Whilst those would usually stay within the same major release, the update process is exactly the same as moving to a higher version.
As one of the major components of ZVR, the Zerto Virtual Manager (ZVM) manages your recovery journal. During the ZVM update the protection of your virtual machines continues, but no new checkpoints are written to the journal in the recovery site. Due to this, after the update, you might see alarms that the journal history and RPO do not meet the specified target.
Upgrading Virtual Replication Appliances (VRAs), on the other hand, will have an impact on replication but this can be minimised if you perform a vMotion of the protected virtual machines, managed by the VRA, to another host. If you choose to leave the protected virtual machines on the host whilst you are upgrading the VRA, a Delta Sync is performed following the upgrade.
2. Run the installer with administrative rights.
3. Click Next on the initial installer screen.
4. Accept the EULA.
5. Using the option to auto-update the VRAs feature should be used with caution. Selecting this option will perform the upgrades one VRA at a time, without any manual input. As mentioned in the 'Impact to your environment' section, the VRA upgrades affect the replication of your VMs. In larger environments you might with to stage the upgrades in phases. You might also want to consider migrating your business critical workloads between hosts when performing upgrades, to minimize any impact in case of an unexpected outage.
6. Zerto will perform the validation checks. If they complete successfully you will be able to click Run to start the update process. If there are any errors or warnings you can review them by clicking on the result code.
7. Wait until the update completes.
8. Once the updated has completed tick the box to open the Zerto interface.
9. Once you have logged in to the ZVM web interface, you will be able to track the progress of VRA updates in the Setup tab and in the Tasks view.
Once all the VRAs show "Latest" in the VRA Version column, the update has been completed.
If you would like to perform a manual update of the VRAs, then you need to tick the box to the right of the VRA, navigate to the More menu in the top right and select Upgrade from the drop down list.