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 Documentation
This documentation covers the installation, configuration, and usage of Dokku - a Docker-powered PaaS that provides a Heroku-like experience.
Getting Started
- Installation - Install Dokku on your server
- Advanced Installation - Custom installation options
- Upgrading - Upgrade to newer Dokku versions
- Uninstalling - Remove Dokku from your server
- Troubleshooting - Common issues and solutions
- Where to Get Help - Support resources
Deployment
- Application Deployment - Deploy your first app
- Application Management - Manage deployed applications
- Logs - View application logs
- Remote Commands - Run commands remotely
- User Management - Manage SSH access
- Zero Downtime Deploys - Deploy without interruption
Deployment Methods
Builders
- Builder Management - Configure build systems
- Buildpack Management - Manage buildpack settings
- Herokuish Buildpacks - Heroku-compatible buildpacks
- Cloud Native Buildpacks - CNB support
- Dockerfiles - Build from Dockerfile
- Nixpacks - Nixpacks builder
- Railpack - Railpack builder
- Lambda - Lambda-style functions
- Null Builder - Skip the build phase
Schedulers
- Scheduler Management - Configure schedulers
- Docker Local - Default Docker scheduler
- K3s - Lightweight Kubernetes
- Kubernetes - External Kubernetes clusters
- Nomad - HashiCorp Nomad
- Null Scheduler - Skip scheduling
Continuous Integration
- Generic CI - General CI/CD setup
- GitHub Actions
- GitLab CI
- Woodpecker CI
Configuration
- Environment Variables - Configure app environment
- Domains - Custom domain management
- SSL/TLS - HTTPS and certificates
Networking
- Proxy Management - Reverse proxy configuration
- Port Management - Port mapping and exposure
- DNS - DNS configuration
- Network - Docker network management
Proxies
Processes
- Process Management - Scale and manage processes
- Scheduled Cron Tasks - Scheduled jobs
- One-off Tasks - Run one-time commands
- Entering Containers - Access running containers
Advanced Usage
- Persistent Storage - Mount volumes
- Docker Options - Custom Docker run arguments
- Resource Management - CPU and memory limits
- Plugin Management - Install and manage plugins
- Registry Management - Docker registry integration
- Repository Management - Git repository settings
- Build Tracking - Inspect, cancel, and manage builds
- Deployment Tasks - Pre/post deploy hooks
- Event Logs - Dokku event history
- Backup and Recovery - Data backup strategies
Development
- Architecture - Internal architecture overview for contributors
- Plugin Creation - Build custom plugins
- Plugin Triggers - Available plugin hooks
- Testing - Test Dokku and plugins
- Release Process - How Dokku releases work
Community
Enterprise
- Dokku Pro - Commercial features and support
Appendices
Migration Guides
- 0.38.0
- 0.37.0
- 0.36.0
- 0.35.0
- 0.34.0
- 0.33.0
- 0.32.0
- 0.31.0
- 0.30.0
- 0.29.0
- 0.28.0
- 0.27.0
- 0.26.0
- 0.25.0
- 0.24.0
- 0.23.0
- 0.22.0
- 0.21.0
- 0.20.0
- 0.10.0
- 0.9.0
- 0.8.0
- 0.7.0
- 0.6.0
- 0.5.0
File Formats
- app.json - Application configuration
- Procfile - Process definitions
- Dockerfile - Docker build instructions
- .buildpacks - Buildpack configuration
- project.toml - CNB configuration
- nixpacks.toml - Nixpacks configuration
- railpack.json - Railpack configuration
- lambda.yml - Lambda configuration
- nginx.conf.sigil - Nginx template customization