ZStack Cloud 5.3.0>ZStack Cloud Tutorials>Private Cloud>Platform Upgrade Tutorial>Overview

Overview

To upgrade ZStack Cloud, you need to upgrade the management nodes, compute nodes, storage nodes, and network nodes to the latest version and update basic software packages, software library dependencies, and core virtualization tools. This document describes how to upgrade ZStack Cloud in details, including:

Limitations

This document applies to cloud platform upgrading of the same repository (repo), which means:

The management nodes and all hosts on the cloud platform are using the same operating system (OS) version, for example, all use the h84r OS.
The OS version used by the target ISO is consistent with OS version currently used by the management nodes and hosts. For example, if all management nodes and hosts on the cloud platform are using the h84r OS, you must use a ZStack Cloud ISO of the h84r edition to perform the upgrading.

Upgrading Mechanism

ZStack Cloud provides the following upgrading mechanisms:

Seamless upgrading: In a same-repo environment, ZStack Cloud of any old version can be upgraded to the latest version.
Lossless upgrading: The upgrade process does not affect the services running in VM instances.

Note:

This document takes upgrading the cloud platform of same-repo with the h84r ISO as an example.
If you need to change host OS or upgrade a cloud platform of multiple repos, contact the official technical support for help.

Next Chapter: Considerations

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