A simple Drone plugin for updating Kubernetes deployments from templates & configMaps from files. Follows from vallard/drone-kube but with dependency management, up-to-date client-go, docs updated to Drone 1.0.0 syntax, examples and a different structure. This plugin will create a deployment if it doesn't currently exist.

Usage

Add the following build step to your drone pipeline definition. Currently this plugin only updates deployments, it does not create them. I can add this behaviour or I will accept pull requests to introduce it.

drone.yaml deployment example

- name: Deploy app
  image: danielgormly/drone-plugin-kube
  settings:
    template: path/to/deployment.yaml # within repo
    ca: LS0tLS1... # BASE64 encoded string of the K8s CA cert
    server: https://10.0.0.20:6443 # K8s master node address
    token:
      from_secret: kubernetes_token # Service account token to a service account that can manage deployments
    namespace: custom # [Optional] Kubernetes namespace to use (defaults to `default`)
    [example_custom_key]: string # [Optional, example] Any additional values you label here will be available for template interpolation (lower case key names only!)

Deployment templates

Deployment config files are first interpreted by aymerick/raymond (handlebarsjs equivalent). You can use all available raymond expressions and anything you put in settings will be made available in your deployment template e.g. {{namespace}}. See example/deployment.template.yaml for a complete example.

Config maps from files

In this case, you can create a template just like deployment.yaml but you can provide a file path (relative to the repo's root) in the plugin setting configmap_file. (Currently only accepts utf-8 encoded data). Like deployments, this will both create new or update existing configmaps (based on the configmap name).

Adding a service account to Kubernetes that can manage deployments

See example/Role.yaml, example/ServiceAccount.yaml, example/RoleBinding.yaml.

Development notes

No tagged releases or support for older go libraries yet, happy to take feedback in Github issues or PRs.
Kubernetes client not yet supported by dep, so we are using brew install glide.
Update dependencies with brew glide update --strip-vendor
Installing kubernetes/client-go
Creating a Drone plugin in Go
Testing with minikube (OSX: brew cask install minikube)
Client-go API Docs @ godoc.org