update-kube-ovn

#!/usr/bin/env bash
set -euxo pipefail

# Update kube-ovn to the latest version. This script will:
# 1. Sync the kube-ovn container image to rocks.canonical.com
# 2. Update manifests in templates/kube-ovn
# 3. Update plugins/kubectl-ko

tag="${tag:-$(wget -O- https://api.github.com/repos/kubeovn/kube-ovn/releases/latest | jq .tag_name -r)}"

# Sync image
image="kubeovn/kube-ovn:$tag"
cat << EOF > regsync.yaml
sync:
- type: image
  source: $image
  target: upload.rocks.canonical.com:5000/cdk/$image
EOF
regsync once -c regsync.yaml
rm regsync.yaml

# Build manifests. Unfortunately, the upstream Kube-OVN project does not
# publish updated manifests with each release. To get "correct" manifests for a
# given release, we have to extract them from the install.sh script.
#
# Here, we attempt to do this by modifying install.sh such that it does not
# actually call out to kubectl. Then we run it. This is extremely brittle and
# likely to fail in a future Kube-OVN release.
(cd templates/kube-ovn
  rm ./*
  wget "https://raw.githubusercontent.com/kubeovn/kube-ovn/$tag/dist/images/install.sh"
  sed -i install.sh \
    -e "s/^VERSION=.*/VERSION='$tag'/" \
    -e 's/^addresses=.*/addresses=ADDRESSES/' \
    -e 's/^count=.*/count=1/'

  # ensure the script does not call the real kubectl
  mkdir bin
  ln -s "$(which true)" bin/kubectl
  (export PATH="bin:$PATH"
    bash install.sh || true
  )
  rm -rf bin install.sh

  # install.sh doesn't produce speaker.yaml, so we still need to obtain that
  # from the yamls folder
  wget "https://raw.githubusercontent.com/kubeovn/kube-ovn/$tag/yamls/speaker.yaml"
  sed -i speaker.yaml \
    -e "s/image:.*/image: kubeovn\/kube-ovn:$tag/"

  # Add header
  for f in *; do
    echo "# DO NOT EDIT - Autogenerated by update-kube-ovn script for kube-ovn $tag" > "$f.tmp"
    cat "$f" >> "$f.tmp"
    mv "$f.tmp" "$f"
  done
)

# Update kubectl-ko
wget "https://raw.githubusercontent.com/kubeovn/kube-ovn/$tag/dist/images/kubectl-ko" -O plugins/kubectl-ko