Helm

#!/bin/bash

set -ex

FAILED_RELEASES_FILE_PATH=./tmp/failed_releases.txt
DEPLOYED_RELEASES_FILE_PATH=./tmp/helm_deployed_releases.txt

# Use the helm list command to fecth all releases with failed revisions and save to a file
fetch_failed_releases() {
  rm ./tmp/*.txt
  mkdir -p tmp
  failed_releases=$(helm list --failed | awk '{print $1}' | tail -n +2)
  echo $failed_releases > $FAILED_RELEASES_FILE_PATH
};

# Filter releases with the latest failed revision and generate a report
filter_latest_failed_revision() {
  mkdir -p reports
  IFS=' ' read -r -a releases < $FAILED_RELEASES_FILE_PATH
  current_time=$(date "+%Y%m%d%H%M%S")

  for release in "${releases[@]}"
    do
      latest_release=$(helm history  --col-width 500 $release | tail -1)
      status=$(echo $latest_release | awk '{print $7}')
      echo "$release | $status"

      if [ $status == "FAILED" ]
      then
        echo $release $latest_release >> ./reports/helm_failed_releases_$current_time.txt
      else
        echo $release >> $DEPLOYED_RELEASES_FILE_PATH
      fi
    done
}

# remove all failed revisions from a list of releases
remove_failed_revisions() {
  mapfile -t deployed_releases < $DEPLOYED_RELEASES_FILE_PATH
  for deploy in "${deployed_releases[@]}"
    do
      mapfile -t deployed_history <<< $(helm history $deploy | tail -n +2)
      for history in "${deployed_history[@]}"
        do
          status=$(echo $history | awk '{print $7}')
          if [ $status == "FAILED" ]
          then
            revision=$(echo $history | awk '{print $1}')
            echo "$deploy.v$revision revision deleted"
            kubectl delete cm $deploy.v$revision -nkube-system
          fi
        done
    done
}

##--------------------MAIN--------------------##

# fetch_failed_releases
# filter_latest_failed_revision
# remove_failed_revisions