kubernetes DevOps Operation Script

clean_kubernetes_jobs.sh

BY_LIST_FILE="NONE"
COMPLETED="1/."
AGE="3"
NAME_PATTERN=".*"


while [[ $# -gt 0 ]]; do
key="$1"

case $key in
    -c|--completed)
    COMPLETED="$2\/."
    shift # past argument
    shift # past value
    ;;
    -t|--age)
    AGE="$2"
    shift # past argument
    shift # past value
    ;;
    -n|--name)
    NAME_PATTERN="$2"
    shift # past argument
    shift # past value
    ;;
    -l|--list)
    BY_LIST_FILE="$2"
    shift # past argument
    shift # past value
    ;;
    # -f|--force)
    # FORCE="TRUE"
    # shift # past argument
    # ;;
    # -p|--prep)
    # PREP="$4"
    # shift # past argument
    # ;;
    # --default)
    # DEFAULT=YES
    # shift # past argument
    # ;;
    *)    # unknown option
    POSITIONAL+=("$1") # save it in an array for later
    shift # past argument
    ;;
esac
done

if [ "$BY_LIST_FILE" = "NONE" ]
then
  AGE_PATTERN=$(echo "([$AGE-9]|[1-4][0-9]|50)d")

  # if age = 0, then also remove jobs less than a day
  if [ "$AGE" = "0" ]
  then
    AGE_PATTERN="${AGE_PATTERN}|."
  fi

  echo "CLEAN UP JOBS with COMPLETED=$COMPLETED; and AGE>=$AGE (AGE PATTERN $AGE_PATTERN); and job NAME PATTERN $NAME_PATTERN"


  JOB_LIST=$(kubectl get jobs --sort-by=.metadata.creationTimestamp | awk  -v completed="$COMPLETED" '$2 ~ completed' | awk -v pattern="$AGE_PATTERN" '$4 ~ pattern' | awk -v pattern="$NAME_PATTERN" '$1 ~ pattern' | awk '{print $1}')

else
  JOB_LIST=$(cat $BY_LIST_FILE)
fi

l=1
size=128
TOTAL=$(echo $JOB_LIST | wc -w)

echo ">>>>>> To delete $TOTAL jobs in total"

while (( $(echo "$l <= $TOTAL" | bc -l) ))
do
  le=$(echo "$l + $size" | bc -l)
  echo ">>>>>> Fetching job $l to $le (size $size ) of $TOTAL"

  #list jobs to delete
  echo $JOB_LIST | cut -d' ' -f${l}-${le}

  #delete jobs
  kubectl delete --cascade=true --timeout=6s job $( echo $JOB_LIST | cut -d' ' -f${l}-${le} )
  l=$(echo "$le + 1" | bc -l)
done