Dokku 0.27.x Wrapup
Dokku version 0.27.0 was released a few months ago. This post covers the important changes that occurred throughout the lifetime of the 0.27.x series. A future post will cover the 0.28.0 release.
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OS and Architecture Support¶
Ubuntu Focal was added as a release target. We also added support for ARM (32-bit) and ARM64 architectures. Users on Raspberry Pis should be able to install the latest Dokku, regardless of OS or Architecture.
Additionally, the Dokku docker image is now based on Focal :)
App and service filtering¶
It is now possible to filter apps and services via the
user-auth-service triggers. These can be implemented in custom plugins to constrain what a user has access to, and is in use within Dokku Pro for it's team-management system.
App domain renames are scoped to global domains¶
Previously, if you had an app named
test with a domain of
tester.com and renamed it to
test-2, we would rename the domain to
test-2er.com. We've now scoped this so app renames only impact domains associated with any global domains on the server.
Remove bad intermediate containers¶
Due to how Dokku handles the build process, intermediate containers reuse the internal docker image name for an app. This means that it is sometimes possible to execute
dokku run against an intermediate image.
Dokku now properly removes intermediate images if the build fails.
Support for special characters in docker container options¶
Dokku now supports using special characters, such as parenthesis, in container options. Here is an example:
Some characters should be escaped - and quoting matters! - but label-based proxy-implementations can now take full advantage of apps deployed via Dokku.
As with every upgrade, please see the 0.27.0 migration guide for more information on upgrading to 0.27.0.
It's a wrap¶
Those were the major changes in 0.27.x. Our next post will cover 0.28.0!
As always, please post issues with bugs or functionality you think Dokku might benefit from. As well, feel free to hop into Github Discussions or Slack channel if you have questions, comments, or concerns.