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info_tfgrid/collections/developers/internals/zos/release/readme.md

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Releases of Zero-OS

We use a simple pipeline release workflow. Building and file distribution are made using GitHub Actions. Usable files are available on the Zero-OS Hub.

This pipeline is made to match the 3 different type of running mode of 0-OS. For more information head to the upgrade documentation.

Development build

On a push to main branch on the zos repository, a new development build is triggered. If the build succeed, binaries are packed into an flist and uploaded to the tf-autobuilder repository of the hub.

This flist is then promoted into the tf-zos repository of the hub and a symlink to this latest build is made (tf-autobuilder/zos:development-3:latest.flist)

Releases

We create 3 types of releases:

  • QA release, in this release the version is suffixed by qa<number> for example v3.5.0-qa1.
  • RC release, in this release the version is suffixed by rc<number> for example v3.5.0-rc2.
  • Main release, is this release the version has no suffix, for example v3.5.0

The release cycle goes like this:

  • As mentioned before devnet is updated the moment new code is available on main branch. Since the dev release is auto linked to the latest flist on the hub. Nodes on devnet will auto update to the latest available build.
  • Creating a qa release, will not not trigger the same behavior on qa net, same for both testnet and mainnet. Instead a workflow must be triggered, this is only to make sure 100% that an update is needed.
  • Once the build of the release is available, a deploy workflow needed to be triggered with the right version to deploy on the proper network.
    • The work flow all what it does is linking the right version under the hub tf-zos repo

The deploy flow is rarely used, the on chain update is also available. By setting the right version on tfchain, the link on the hub is auto-updated and hence the deploy workflow won't be needed to be triggered. Although we have it now as a safety net in case something goes wrong (chain is broken) and we need to force a specific version on ZOS.