goreleaser: add a release docker image (#101)

.circleci/Dockerfile

@@ -1,7 +1,17 @@
+# Builds a Docker image with:
+# - ctlptl
+# - docker
+# - kubectl
+# - kind
+# - socat
+# - golang build toolchain
+#
+# Similar to the release image (which contains everything BUT the build
+# toolchain)
+
 FROM golang:1.14-buster
 
-RUN apt update
-RUN apt install -y curl ca-certificates liblz4-tool rsync socat
+RUN apt update && apt install -y curl ca-certificates liblz4-tool rsync socat
 
 # Install docker
 # Adapted from https://github.com/circleci/circleci-images/blob/staging/shared/images/Dockerfile-basic.template

.circleci/config.yml

@@ -62,6 +62,8 @@ jobs:
       - image: circleci/golang:1.14
     steps:
       - checkout
+      - setup_remote_docker:
+          version: 19.03.12
       - run: git fetch --tags
       - run: curl -sfL https://install.goreleaser.com/github.com/goreleaser/goreleaser.sh | sh
       - run: sudo mv ./bin/goreleaser /usr/local/bin/
@@ -74,9 +76,12 @@ jobs:
       - image: circleci/golang:1.14
     steps:
       - checkout
+      - setup_remote_docker:
+          version: 19.03.12
       - run: git fetch --tags
       - run: curl -sfL https://install.goreleaser.com/github.com/goreleaser/goreleaser.sh | sh
       - run: sudo mv ./bin/goreleaser /usr/local/bin/
+      - run: echo "$DOCKER_TOKEN" | docker login --username "$DOCKER_USERNAME" --password-stdin
       - run: goreleaser --rm-dist
       - slack/status:
           mentions: "nick"
@@ -100,6 +105,7 @@ workflows:
       - release:
           context:
           - Tilt Release CLI Context
+          - Tilt Docker Login Context
           filters:
             branches:
               only: never-release-on-a-branch

.goreleaser.yml

@@ -52,6 +52,11 @@ scoop:
   homepage: "https://ctlptl.dev/"
   description: "Making local Kubernetes clusters easy to set up and tear down"
   license: Apache-2.0
+dockers:
+- image_templates:
+    - "tiltdev/ctlptl"
+    - "tiltdev/ctlptl:{{ .Tag }}"
+  dockerfile: hack/Dockerfile
 
 # Uncomment these lines if you want to experiment with other
 # parts of the release process without releasing new binaries.

hack/Dockerfile

@@ -0,0 +1,46 @@
+# Builds a Docker image with:
+# - ctlptl
+# - docker
+# - kubectl
+# - kind
+# - socat
+#
+# Good base image for anyone that wants to use ctlptl in a CI environment
+# to set up a one-time-use cluster.
+#
+# Built with goreleaser.
+
+FROM debian:buster
+
+RUN apt update && apt install -y curl ca-certificates liblz4-tool rsync socat
+
+# Install docker
+# Adapted from https://github.com/circleci/circleci-images/blob/staging/shared/images/Dockerfile-basic.template
+# Check https://download.docker.com/linux/static/stable/x86_64/ for latest versions
+ENV DOCKER_VERSION=19.03.5
+RUN set -exu \
+  && DOCKER_URL="https://download.docker.com/linux/static/stable/x86_64/docker-${DOCKER_VERSION}.tgz" \
+  && echo Docker URL: $DOCKER_URL \
+  && curl --silent --show-error --location --fail --retry 3 --output /tmp/docker.tgz "${DOCKER_URL}" \
+  && ls -lha /tmp/docker.tgz \
+  && tar -xz -C /tmp -f /tmp/docker.tgz \
+  && mv /tmp/docker/* /usr/bin \
+  && rm -rf /tmp/docker /tmp/docker.tgz \
+  && which docker \
+  && (docker version || true)
+
+# Install kubectl client
+RUN apt install -y apt-transport-https gnupg \
+  && curl -fsS https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add - \
+  && touch /etc/apt/sources.list.d/kubernetes.list \
+  && echo "deb http://apt.kubernetes.io/ kubernetes-xenial main" | tee -a /etc/apt/sources.list.d/kubernetes.list \
+  && apt update && apt install -y kubectl
+
+# install Kind
+ENV KIND_VERSION=v0.10.0
+RUN set -exu \
+  && curl -fLo ./kind-linux-amd64 "https://github.com/kubernetes-sigs/kind/releases/download/${KIND_VERSION}/kind-linux-amd64" \
+  && chmod +x ./kind-linux-amd64 \
+  && mv ./kind-linux-amd64 /usr/local/bin/kind
+
+COPY ctlptl /usr/local/bin/ctlptl