496ede44b7
Adds a `scheduler-k3s:preview <app>` command that renders a unified diff between the manifests currently stored in the live Helm release for an app and the manifests that the next deploy would roll out. The diff is produced entirely via the Helm Go SDK that scheduler-k3s already uses, with no external `helm` binary or `helm-diff` plugin install required. The underlying diff and parse logic is vendored from `databus23/helm-diff` (Apache 2.0) into a new internal package, trimmed of three-way-merge, release-ownership tracking, and the non-default output formatters. The chart-construction half of `TriggerSchedulerDeploy` has been extracted into a reusable `BuildAppChart` helper so deploy and preview share the same chart materialization without duplicating template logic. Secret values are redacted by default in preview output; `--show-secrets` and `--show-secrets-decoded` flags match the upstream `helm diff` UX. Only the main app helm release is compared in this iteration; auxiliary releases for config vars, image-pull secrets, and TLS certificates are out of scope and documented as such.
Dokku
Docker powered mini-Heroku. The smallest PaaS implementation you've ever seen.
Sponsors
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Backers
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Requirements
A fresh VM running any of the following operating systems:
- Ubuntu 22.04 / 24.04 (amd64/arm64) - Any currently supported release
- Debian 11+ (amd64/arm64)
An SSH keypair that can be used for application deployment. If this exists before installation, it will be automatically imported into dokku.
Otherwise, you will need to import the keypair manually after installation using dokku ssh-keys:add.
Installation
To install the latest stable release, run the following commands as a user who has access to sudo:
wget -NP . https://dokku.com/install/v0.38.16/bootstrap.sh
sudo DOKKU_TAG=v0.38.16 bash bootstrap.sh
You can then proceed to configure your server domain (via dokku domains:set-global) and user access (via dokku ssh-keys:add) to complete the installation.
If you wish for a more unattended installation method, see these docs.
Upgrade
View the docs for upgrading from an older version of Dokku.
Documentation
Full documentation - including advanced installation docs - are available online at https://dokku.com/docs/getting-started/installation/.
Support
You can use GitHub Issues, check Troubleshooting in the documentation, or join us on Gliderlabs Slack in the #dokku channel.
Contribution
After checking GitHub Issues, the Troubleshooting Guide or having a chat with us on Gliderlabs Slack in the #dokku channel, feel free to fork and create a Pull Request.
While we may not merge your PR as is, they serve to start conversations and improve the general Dokku experience for all users.
License
MIT License © Jeff Lindsay