Gitkube is a tool for building and deploying Docker images on Kubernetes using
After a simple initial setup, users can simply keep
git push-ing their repos to build and deploy to Kubernetes automatically.
When should I use gitkube?
- Ideal for development where you can push your WIP branch to the cluster to test.
- Reference implementation for writing git-based automation on your server. Fork this repo and create your own CRD + controller + git remote hook that can do things on the Kubernetes cluster.
- No dependencies except native tooling (git, kubectl)
- Plug and play installation
- Simple public key based authentication
- RBAC ready - Control access to git remotes using RBAC
- Support for namespace based multi-tenancy - Remotes can only deploy to their own namespace
- No assumptions about repository structure
Gitkube will run on any Kubernetes vendor/distribution AS IS. In case you find any difficulties in the setup, please comment on #33
Install gitkubeUsing kubectl
Using gitkube CLI
kubectl create -f https://storage.googleapis.com/gitkube/gitkube-setup-stable.yaml #expose gitkubed service kubectl --namespace kube-system expose deployment gitkubed --type=LoadBalancer --name=gitkubed
Install Gitkube CLI:
curl https://raw.githubusercontent.com/hasura/gitkube/master/gimme.sh | bash
- Windows: download the latest release and add it to your
Use Gitkube CLI to install Gitkube on the cluster:
The above installation steps work on most Kubernetes clusters. Detailed walkthroughs for few specific providers are also available:
Follow this example repo for a typical workflow of gitkube.
How it works
Gitkube has three components:
- Remote: Custom resource defined by a K8s CRD
- gitkube-controller: Controller that manages Remote objects and propogates changes to gitkubed
- gitkubed: Git host that builds docker image from the repo and rolls out deployment
- Local dev: User creates a base git repo for the application with Dockerfile and K8s deployment
- Setting Remote: User defines a spec for Remote containing the rules for
- Deploying application: Once a Remote is setup, application can be deployed to K8s using
git push <remote> master
User should have a git repo with source code and a Dockerfile. User should also create a base K8s deployment for the application.
A Remote resource consists of 3 parts:
- authorizedKeys: List of ssh-keys for authorizing
- registry: Details of docker registry where images are pushed post-build.
- deployments: Spec for building docker image and updating corresponding K8s deployment.
Here is a typical spec for a Remote:
apiVersion: gitkube.sh/v1alpha1 kind: Remote metadata: name: sampleremote namespace: default spec: # Insert ssh-keys for allowing users to git push authorizedKeys: - "ssh-rsa your-ssh-public-key" # Provide registry details: https://github.com/hasura/gitkube/blob/master/docs/registry.md registry: url: "docker.io/user" credentials: secretRef: regsecret # Name of docker-registry secret # Define deployment rules deployments: - name: www # Name of K8s deployment which is updated on git push containers: - name: www # Name of container in the deployment which is built during git push path: example/www # Docker build context path in the git repo dockerfile: example/www/Dockerfile # Location of Dockerfile for the source code
Once a Remote is created, it gets a git remote URL which you can find in its
$ kubectl get remote sampleremote -o yaml ... status: remoteUrl: ssh://email@example.com/~/git/default-sampleremote remoteUrlDesc: ""
Add the generated
remoteUrl in git
$ git remote add sampleremote ssh://firstname.lastname@example.org/~/git/default-sampleremote
$ git push sampleremote master
Gitkube is open to evolution. Some of the features to be added in future include:
- Allowing all apps (daemonset, statefulset) to be deployed using
git push. Current support is limited to deployments. #19
- Allowing different git hooks to be integrated #20
Gitkube is an open source project licensed under Apache License 2.0
Contributions are welcome.
Community and Support
Follow @gitkube to stay updated.
Gitkube logo concept and design by Samudra Gupta.