snapcraft.yaml

name: microk8s
version-script: |
  . build-scripts/prepare-env.sh > /dev/null
  echo $KUBE_VERSION
version: "latest"
summary: Kubernetes for workstations and appliances
description: |-
 MicroK8s is a small, fast, secure, single node Kubernetes that installs on
 just about any Linux box. Use it for offline development, prototyping, 
 testing, or use it on a VM as a small, cheap, reliable k8s for CI/CD. It's 
 also a great k8s for appliances - develop your IoT apps for k8s and deploy 
 them to MicroK8s on your boxes.
 
grade: stable
confinement: classic

apps:
  daemon-etcd:
    command: run-etcd-with-args
    daemon: simple
  daemon-docker:
    command: run-docker-with-args
    daemon: simple
  daemon-apiserver:
    command: run-with-config-args kube-apiserver
    daemon: simple
  daemon-apiserver-kicker:
    command: apiservice-kicker
    daemon: simple
  daemon-controller-manager:
    command: run-with-config-args kube-controller-manager
    daemon: simple
  daemon-scheduler:
    command: run-with-config-args kube-scheduler
    daemon: simple
  daemon-kubelet:
    command: run-with-config-args kubelet
    daemon: simple
  daemon-proxy:
    command: run-with-config-args kube-proxy
    daemon: simple
  kubectl:
    command: microk8s-kubectl.wrapper
  docker:
    command: microk8s-docker.wrapper
  inspect:
    command: sudo SNAP_DATA=${SNAP_DATA} ${SNAP}/inspect.sh
  enable:
    command: microk8s-enable.wrapper
  disable:
    command: microk8s-disable.wrapper
  start:
    command: microk8s-start.wrapper
  stop:
    command: microk8s-stop.wrapper
  status:
    command: microk8s-status.wrapper
  config:
    command: microk8s-config.wrapper
  reset:
    command: microk8s-reset.wrapper
  istioctl:
    command: microk8s-istioctl.wrapper

parts:
  libnftnl:
    plugin: autotools
    source: https://www.netfilter.org/projects/libnftnl/files/libnftnl-1.0.9.tar.bz2
    build-packages:
    - libjansson-dev
    - libmnl-dev
  iptables:
    after:
    - libnftnl
    source: https://www.netfilter.org/projects/iptables/files/iptables-1.6.1.tar.bz2
    plugin: autotools
    build-packages:
    - bison
    - flex
    - libmnl-dev
    - libnfnetlink-dev
    - libnetfilter-conntrack3
    - libnetfilter-conntrack-dev
    configflags:
    - "--disable-shared"
    - "--enable-static"
    prime: [ -bin/iptables-xml ]
  docker:
    after: [iptables]
    plugin: dump
    stage-packages:
    - conntrack
    - docker.io
    - aufs-tools
    - gawk
    - sed
    source: .
    stage:
    - -sbin/xtables-multi
    - -sbin/iptables*
    - -lib/xtables
    override-build: "true"
  microk8s:
    after: [docker]
    plugin: dump
    build-attributes: [no-patchelf]
    build-packages:
    - curl
    - openssl
    - file
    stage-packages:
    - net-tools
    - util-linux
    - zfsutils-linux
    - socat
    - iproute2
    - dpkg
    source: .
    override-build: |
      set -eu
      . build-scripts/prepare-env.sh

      if [ -z "$KUBE_SNAP_BINS" ]; then
        echo "Downloading binaries from upstream"
        # Also sets KUBE_SNAP_BINS
        . build-scripts/fetch-binaries.sh
      fi

      echo "Setting default daemon configs"
      cp -r $KUBE_SNAP_ROOT/microk8s-resources/default-args .

      echo "Building certs"
      build-scripts/build-certs.sh
      cp -r $KUBE_SNAP_ROOT/microk8s-resources/certs-beta .

      echo "Preparing cni"
      mkdir -p opt/cni/bin/
      cp $KUBE_SNAP_BINS/cni/* opt/cni/bin/

      echo "Preparing dockerd"
      cp $KUBE_SNAP_ROOT/microk8s-resources/docker-profile .

      echo "Preparing etcd"
      cp $KUBE_SNAP_BINS/etcd/etcd .
      cp $KUBE_SNAP_BINS/etcd/etcdctl .

      echo "Preparing kube-apiserver"
      cp $KUBE_SNAP_BINS/$KUBE_ARCH/kube-apiserver .
      cp $KUBE_SNAP_ROOT/microk8s-resources/known_token.csv .
      cp $KUBE_SNAP_ROOT/microk8s-resources/basic_auth.csv .

      echo "Preparing kube-controller-manager"
      cp $KUBE_SNAP_BINS/$KUBE_ARCH/kube-controller-manager .

      echo "Preparing kube-scheduler"
      cp $KUBE_SNAP_BINS/$KUBE_ARCH/kube-scheduler .

      echo "Preparing kubelet"
      mkdir -p configs
      cp $KUBE_SNAP_BINS/$KUBE_ARCH/kubelet .
      cp $KUBE_SNAP_ROOT/microk8s-resources/kubelet.config ./configs/

      echo "Preparing kube-proxy"
      cp $KUBE_SNAP_BINS/$KUBE_ARCH/kube-proxy .
      cp $KUBE_SNAP_ROOT/microk8s-resources/kubeproxy.config .

      echo "Preparing kubelet"
      cp $KUBE_SNAP_BINS/$KUBE_ARCH/kubectl .

      echo "Preparing user config"
      cp $KUBE_SNAP_ROOT/microk8s-resources/client.config .

      echo "Creating commands and wrappers"
      cp $KUBE_SNAP_ROOT/microk8s-resources/wrappers/* .


      cp -r $KUBE_SNAP_ROOT/microk8s-resources/actions .
      if [ "${ARCH}" = "arm64" ]
      then
        # Some actions are not available on arm64
        # Nvidia support
        rm "actions/enable.gpu.sh"
        rm "actions/disable.gpu.sh"
        rm "actions/gpu.yaml"
        # Istio support
        rm "actions/enable.istio.sh"
        rm "actions/disable.istio.sh"
      else
        # Istio addon
        echo "Preparing istio"
        cp $KUBE_SNAP_BINS/istioctl .
        cp -r $KUBE_SNAP_BINS/istio-yaml ./actions/istio
      fi

      echo "Creating inspect hook"
      cp $KUBE_SNAP_ROOT/scripts/inspect.sh .

      snapcraftctl build

  # Unfortunately we cannot add package repositories to our snaps
  # https://forum.snapcraft.io/t/proposal-additional-package-sources/2199
  # We handpick the debs we need.
  # To update these debs add the repository
  # Follow the instructions in https://github.com/NVIDIA/nvidia-docker and
  # install the https://nvidia.github.io/nvidia-docker/$distribution/nvidia-docker.list repo.
  # Use apt-cache show <package> to make sure
  # a) the dockerd we ship in this snap is supported by nvidia-container-runtime
  # b) the version dependencies of each package is met.
  nvidia-runtime:
    plugin: dump
    source: https://nvidia.github.io/nvidia-container-runtime/ubuntu16.04/amd64/nvidia-container-runtime_2.0.0+docker18.06.1-1_amd64.deb
    source-type: deb
    override-build: |
      set -eu
      ARCH=$(dpkg --print-architecture)
      if ! [ "${ARCH}" = "arm64" ]
      then
        snapcraftctl build
      else
        echo "Skipped"
      fi

  nvidia-runtime-hook:
    plugin: dump
    source: https://nvidia.github.io/nvidia-container-runtime/ubuntu16.04/amd64/nvidia-container-runtime-hook_1.4.0-1_amd64.deb
    source-type: deb
    override-build: |
      set -eu
      ARCH=$(dpkg --print-architecture)
      if ! [ "${ARCH}" = "arm64" ]
      then
        snapcraftctl build
      else
        echo "Skipped"
      fi

  libnvidia:
    plugin: dump
    source: https://nvidia.github.io/libnvidia-container/ubuntu16.04/amd64/libnvidia-container1_1.0.0-1_amd64.deb
    source-type: deb
    override-build: |
      set -eu
      ARCH=$(dpkg --print-architecture)
      if ! [ "${ARCH}" = "arm64" ]
      then
        snapcraftctl build
      else
        echo "Skipped"
      fi

  libnvidia-tools:
    plugin: dump
    source: https://nvidia.github.io/libnvidia-container/ubuntu16.04/amd64/libnvidia-container-tools_1.0.0-1_amd64.deb
    source-type: deb
    override-build: |
      set -eu
      ARCH=$(dpkg --print-architecture)
      if ! [ "${ARCH}" = "arm64" ]
      then
        snapcraftctl build
      else
        echo "Skipped"
      fi