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# Binaries for programs and plugins
*.exe
*.exe~
*.dll
*.so
*.dylib
# Output of the go coverage tool, specifically when used with LiteIDE
*.out
# kaniko base image cache files
sha256:*

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FROM gcr.io/kaniko-project/executor:debug-v0.19.0
ENV HOME /root
ENV USER root
ENV SSL_CERT_DIR=/kaniko/ssl/certs
ENV DOCKER_CONFIG /kaniko/.docker/
ENV DOCKER_CREDENTIAL_GCR_CONFIG /kaniko/.config/gcloud/docker_credential_gcr_config.json
# add the wrapper which acts as a drone plugin
COPY plugin.sh /kaniko/plugin.sh
ENTRYPOINT [ "/kaniko/plugin.sh" ]

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FROM alpine:3.8
RUN apk add --update git
RUN apk add --update jq

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# drone-kaniko
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/).
Example .drone.yml for Drone 1.0 (pushing to Docker Hub):
```yaml
kind: pipeline
name: default
steps:
- name: publish
image: banzaicloud/drone-kaniko
settings:
registry: registry.example.com # if not provided index.docker.io is supposed
repo: registry.example.com/example-project
tags: ${DRONE_COMMIT_SHA}
cache: true
skip_tls_verify: false # set to true for testing registries ONLY with self-signed certs
build_args:
- COMMIT_SHA=${DRONE_COMMIT_SHA}
- COMMIT_AUTHOR_EMAIL=${DRONE_COMMIT_AUTHOR_EMAIL}
username:
from_secret: docker-username
password:
from_secret: docker-password
```
Pushing to GCR:
```yaml
kind: pipeline
name: default
steps:
- name: publish
image: banzaicloud/drone-kaniko
settings:
registry: gcr.io
repo: example.com/example-project
tags: ${DRONE_COMMIT_SHA}
cache: true
json_key:
from_secret: google-application-credentials
```
## Use `.tags` file for tagging
Similarily to official
[drone-docker](https://github.com/drone-plugins/drone-docker) plugin you can use
`.tags` file to embed some custom logic for creating tags for an image.
```yaml
kind: pipeline
name: default
steps:
- name: build
image: golang
commands:
- go get
- go build
- make versiontags > .tags
- name: publish
image: banzaicloud/drone-kaniko
settings:
registry: registry.example.com
repo: registry.example.com/example-project
# tags: ${DRONE_COMMIT_SHA} <= it must be left undefined
username:
from_secret: docker-username
password:
from_secret: docker-password
```
## Auto tag
Set `auto_tag: true`.
```yaml
kind: pipeline
name: default
steps:
- name: build
image: golang
commands:
- go get
- go build
- name: publish
image: banzaicloud/drone-kaniko
settings:
registry: registry.example.com
repo: registry.example.com/example-project
auto_tag: true # higher priority then .tags file
# tags: ${DRONE_COMMIT_SHA} <= it must be left undefined to use auto_tag
username:
from_secret: docker-username
password:
from_secret: docker-password
```
## Test that it can build
```bash
docker run -it --rm -w /src -v $PWD:/src -e PLUGIN_USERNAME=${DOCKER_USERNAME} -e PLUGIN_PASSWORD=${DOCKER_PASSWORD} -e PLUGIN_REPO=banzaicloud/drone-kaniko-test -e PLUGIN_TAGS=test -e PLUGIN_DOCKERFILE=Dockerfile.test banzaicloud/drone-kaniko
```
## Test that caching works
Start a Docker registry at 127.0.0.1:5000:
```bash
docker run -d -p 5000:5000 --restart always --name registry --hostname registry.local registry:2
```
Add the following lines to plugin.sh's final command and build a new image from it:
```diff
+ --cache=true \
+ --cache-repo=127.0.0.1:5000/${PLUGIN_REPO} \
```
```bash
docker build -t banzaicloud/drone-kaniko .
```
Warm up the alpine image to the cache:
```bash
docker run -v $PWD:/cache gcr.io/kaniko-project/warmer:latest --verbosity=debug --image=alpine:3.8
```
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:
```bash
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
```
The very same example just pushing to GCR instead of Docker Hub:
```bash
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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#!/busybox/sh
set -euo pipefail
export PATH=$PATH:/kaniko/
REGISTRY=${PLUGIN_REGISTRY:-index.docker.io}
if [ "${PLUGIN_USERNAME:-}" ] || [ "${PLUGIN_PASSWORD:-}" ]; then
DOCKER_AUTH=`echo -n "${PLUGIN_USERNAME}:${PLUGIN_PASSWORD}" | base64 | tr -d "\n"`
cat > /kaniko/.docker/config.json <<DOCKERJSON
{
"auths": {
"${REGISTRY}": {
"auth": "${DOCKER_AUTH}"
}
}
}
DOCKERJSON
fi
if [ "${PLUGIN_JSON_KEY:-}" ];then
echo "${PLUGIN_JSON_KEY}" > /kaniko/gcr.json
export GOOGLE_APPLICATION_CREDENTIALS=/kaniko/gcr.json
fi
DOCKERFILE=${PLUGIN_DOCKERFILE:-Dockerfile}
CONTEXT=${PLUGIN_CONTEXT:-$PWD}
LOG=${PLUGIN_LOG:-info}
EXTRA_OPTS=""
if [[ -n "${PLUGIN_TARGET:-}" ]]; then
TARGET="--target=${PLUGIN_TARGET}"
fi
if [[ "${PLUGIN_SKIP_TLS_VERIFY:-}" == "true" ]]; then
EXTRA_OPTS="--skip-tls-verify=true"
fi
if [[ "${PLUGIN_CACHE:-}" == "true" ]]; then
CACHE="--cache=true"
fi
if [ -n "${PLUGIN_CACHE_REPO:-}" ]; then
CACHE_REPO="--cache-repo=${REGISTRY}/${PLUGIN_CACHE_REPO}"
fi
if [ -n "${PLUGIN_CACHE_TTL:-}" ]; then
CACHE_TTL="--cache-ttl=${PLUGIN_CACHE_TTL}"
fi
if [ -n "${PLUGIN_BUILD_ARGS:-}" ]; then
BUILD_ARGS=$(echo "${PLUGIN_BUILD_ARGS}" | tr ',' '\n' | while read build_arg; do echo "--build-arg=${build_arg}"; done)
fi
if [ -n "${PLUGIN_BUILD_ARGS_FROM_ENV:-}" ]; then
BUILD_ARGS_FROM_ENV=$(echo "${PLUGIN_BUILD_ARGS_FROM_ENV}" | tr ',' '\n' | while read build_arg; do echo "--build-arg ${build_arg}=$(eval "echo \$$build_arg")"; done)
fi
# auto_tag, if set auto_tag: true, auto generate .tags file
# support format Major.Minor.Release or start with `v`
# docker tags: Major, Major.Minor, Major.Minor.Release and latest
if [[ "${PLUGIN_AUTO_TAG:-}" == "true" ]]; then
TAG=$(echo "${DRONE_TAG:-}" |sed 's/^v//g')
part=$(echo "${TAG}" |tr '.' '\n' |wc -l)
# expect number
echo ${TAG} |grep -E "[a-z-]" &>/dev/null && isNum=1 || isNum=0
if [ ! -n "${TAG:-}" ];then
echo "latest" > .tags
elif [ ${isNum} -eq 1 -o ${part} -gt 3 ];then
echo "${TAG},latest" > .tags
else
major=$(echo "${TAG}" |awk -F'.' '{print $1}')
minor=$(echo "${TAG}" |awk -F'.' '{print $2}')
release=$(echo "${TAG}" |awk -F'.' '{print $3}')
major=${major:-0}
minor=${minor:-0}
release=${release:-0}
echo "${major},${major}.${minor},${major}.${minor}.${release},latest" > .tags
fi
fi
if [ -n "${PLUGIN_TAGS:-}" ]; then
DESTINATIONS=$(echo "${PLUGIN_TAGS}" | tr ',' '\n' | while read tag; do echo "--destination=${REGISTRY}/${PLUGIN_REPO}:${tag} "; done)
elif [ -f .tags ]; then
DESTINATIONS=$(cat .tags| tr ',' '\n' | while read tag; do echo "--destination=${REGISTRY}/${PLUGIN_REPO}:${tag} "; done)
elif [ -n "${PLUGIN_REPO:-}" ]; then
DESTINATIONS="--destination=${REGISTRY}/${PLUGIN_REPO}:latest"
else
DESTINATIONS="--no-push"
# Cache is not valid with --no-push
CACHE=""
fi
/kaniko/executor -v ${LOG} \
--context=${CONTEXT} \
--dockerfile=${DOCKERFILE} \
${EXTRA_OPTS} \
${DESTINATIONS} \
${CACHE:-} \
${CACHE_TTL:-} \
${CACHE_REPO:-} \
${TARGET:-} \
${BUILD_ARGS:-} \
${BUILD_ARGS_FROM_ENV:-}