147 lines
4.1 KiB
Markdown
147 lines
4.1 KiB
Markdown
# drone-kaniko
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A thin shim-wrapper around the official [Google Kaniko](https://cloud.google.com/blog/products/gcp/introducing-kaniko-build-container-images-in-kubernetes-and-google-container-builder-even-without-root-access) Docker image to make it behave like the [Drone Docker plugin](http://plugins.drone.io/drone-plugins/drone-docker/).
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Example .drone.yml for Drone 1.0 (pushing to Docker Hub):
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```yaml
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kind: pipeline
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name: default
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steps:
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- name: publish
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image: banzaicloud/drone-kaniko
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settings:
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registry: registry.example.com # if not provided index.docker.io is supposed
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repo: registry.example.com/example-project
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tags: ${DRONE_COMMIT_SHA}
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cache: true
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skip_tls_verify: false # set to true for testing registries ONLY with self-signed certs
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build_args:
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- COMMIT_SHA=${DRONE_COMMIT_SHA}
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- COMMIT_AUTHOR_EMAIL=${DRONE_COMMIT_AUTHOR_EMAIL}
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username:
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from_secret: docker-username
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password:
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from_secret: docker-password
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```
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Pushing to GCR:
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```yaml
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kind: pipeline
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name: default
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steps:
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- name: publish
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image: banzaicloud/drone-kaniko
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settings:
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registry: gcr.io
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repo: example.com/example-project
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tags: ${DRONE_COMMIT_SHA}
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cache: true
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json_key:
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from_secret: google-application-credentials
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```
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## Use `.tags` file for tagging
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Similarily to official
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[drone-docker](https://github.com/drone-plugins/drone-docker) plugin you can use
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`.tags` file to embed some custom logic for creating tags for an image.
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```yaml
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kind: pipeline
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name: default
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steps:
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- name: build
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image: golang
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commands:
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- go get
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- go build
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- make versiontags > .tags
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- name: publish
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image: banzaicloud/drone-kaniko
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settings:
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registry: registry.example.com
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repo: registry.example.com/example-project
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# tags: ${DRONE_COMMIT_SHA} <= it must be left undefined
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username:
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from_secret: docker-username
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password:
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from_secret: docker-password
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```
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## Auto tag
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Set `auto_tag: true`.
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```yaml
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kind: pipeline
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name: default
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steps:
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- name: build
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image: golang
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commands:
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- go get
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- go build
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- name: publish
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image: banzaicloud/drone-kaniko
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settings:
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registry: registry.example.com
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repo: registry.example.com/example-project
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auto_tag: true # higher priority then .tags file
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# tags: ${DRONE_COMMIT_SHA} <= it must be left undefined to use auto_tag
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username:
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from_secret: docker-username
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password:
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from_secret: docker-password
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```
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## Test that it can build
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```bash
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docker run -it --rm -w /src -v $PWD:/src -e PLUGIN_USERNAME=${DOCKER_USERNAME} -e PLUGIN_PASSWORD=${DOCKER_PASSWORD} -e PLUGIN_REPO=banzaicloud/drone-kaniko-test -e PLUGIN_TAGS=test -e PLUGIN_DOCKERFILE=Dockerfile.test banzaicloud/drone-kaniko
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```
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## Test that caching works
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Start a Docker registry at 127.0.0.1:5000:
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```bash
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docker run -d -p 5000:5000 --restart always --name registry --hostname registry.local registry:2
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```
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Add the following lines to plugin.sh's final command and build a new image from it:
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```diff
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+ --cache=true \
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+ --cache-repo=127.0.0.1:5000/${PLUGIN_REPO} \
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```
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```bash
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docker build -t banzaicloud/drone-kaniko .
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```
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Warm up the alpine image to the cache:
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```bash
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docker run -v $PWD:/cache gcr.io/kaniko-project/warmer:latest --verbosity=debug --image=alpine:3.8
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```
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Run the builder (on the host network to be able to access the registry, if any specified) with mounting the local disk cache, this example pushes to Docker Hub:
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```bash
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docker run --net=host -it --rm -w /src -v $PWD:/cache -v $PWD:/src -e PLUGIN_USERNAME=${DOCKER_USERNAME} -e PLUGIN_PASSWORD=${DOCKER_PASSWORD} -e PLUGIN_REPO=banzaicloud/drone-kaniko-test -e PLUGIN_TAGS=test -e PLUGIN_DOCKERFILE=Dockerfile.test -e PLUGIN_CACHE=true banzaicloud/drone-kaniko
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```
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The very same example just pushing to GCR instead of Docker Hub:
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```bash
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docker run --net=host -it --rm -w /src -v $PWD:/cache -v $PWD:/src -e PLUGIN_REGISTRY=gcr.io -e PLUGIN_REPO=paas-dev1/drone-kaniko-test -e PLUGIN_TAGS=test -e PLUGIN_DOCKERFILE=Dockerfile.test -e PLUGIN_CACHE=true -e PLUGIN_JSON_KEY="$(<$HOME/google-application-credentials.json)" banzaicloud/drone-kaniko
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```
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