delete_fsxn_volume

#!/bin/bash
################################################################################
# THIS SOFTWARE IS PROVIDED BY NETAPP "AS IS" AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
# EVENT SHALL NETAPP BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR'
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
################################################################################
#
# This script is used to delete an FSxN volume.
################################################################################

################################################################################
#  This function just outputs the usage information and exits.
################################################################################
usage () {
cat 1>&2 <<EOF
Usage: $(basename $0) -i volumeID [-r region] [-b] [-w]
where
  volumeID: is the ID of the volume to delete.
  region: is the AWS region where the FSxN filesystem resides.
  -b: enable final backup. Otherwise it is skipped.
  -w: wait for the volume to be deleted before returning.
EOF
  exit 1
}

################################################################################
#  This function waits for the volume to be deleted.
################################################################################
waitForVolumeDelete () {

  local volumeId=$1
  local MaxIterations=60
  local SleepTime=5
  #
  # Wait for the volume to be deleted.
  i=0
  while [ $i -lt $MaxIterations ]; do
    aws fsx describe-volumes --volume-ids $volumeId --output=json --region=$region > $tmpout 2>&1
    if [ $? -eq 0 ]; then
      status=$(jq -r .Volumes[0].Lifecycle $tmpout 2> /dev/null)
      if [ "$status" != "DELETING" -a "$status" != "PENDING" ]; then
        printf "\nError, failed to delete volume with volume ID '$volumeId'. Status = ${status}.\n" 1>&2
        reason="$(jq -r '.Volumes[0].LifecycleTransitionReason.Message' $tmpout 2> /dev/null)"
        if [ ! -z "$reason" ]; then
          echo "Reason: $reason" 1>&2
        else
          cat $tmpout 1>&2
        fi
        return 1
      fi
    else
      # Assume if it failed, it is because the volume was deleted and doesn't exist anymore.
      break
    fi
    [ $quiet != "true" ] && printf "."
    sleep $SleepTime
    let i+=1
  done
  if [ $i -ge $MaxIterations ]; then
    printf "\nFailed to delete volume with volume ID of '$volumeId'. Taking too long.\n" 1>&2
    return 1
  fi
  return 0
}

################################################################################
# Main logic starts here.
################################################################################
tmpout=/tmp/delete-volume.$$
trap 'rm -f $tmpout' exit
#
# Set some defaults.
region=$(aws configure list | egrep '^.*egion ' | awk '{print $2}')
skipBackup=true
waitForCompletion=false
quiet=false
#
# Process command line arguments.
while getopts "qhwbi:r:" option; do
  case $option in
    r) region="$OPTARG"
      ;;
    i) volumeId="$OPTARG"
      ;;
    b) skipBackup=false
      ;;
    w) waitForCompletion=true
      ;;
    q) quiet=true
      ;;
    *) usage
      ;;
  esac
done

if which jq aws > /dev/null 2>&1; then
  :
else
  echo "Error, both 'jq' and 'aws' are required to run this script." 1>&2
  exit 1
fi
#
# Ensure all the required parameters have been provided.
if [ -z "$volumeId" ]; then
  echo "Error, missing required arguments." 1>&2
  usage
fi

aws fsx delete-volume --volume-id $volumeId --region=$region --output=json --ontap-configuration '{"SkipFinalBackup": '$skipBackup'}' > $tmpout 2>&1

if [ $? != "0" ]; then
  echo "Failed to delete volume." 1>&2
  cat $tmpout 1>&2
  exit 1
else
  status=$(jq -r .Lifecycle $tmpout 2> /dev/null)
  if [ "$status" == "DELETING"  -o "$status" == "PENDING" ]; then
    [ $quiet != "true" ] && printf "Volume '$volumeId' is being deleted."
    if [ "$waitForCompletion" == "true" ]; then
      waitForVolumeDelete $volumeId
      if [ $? -ne 0 ]; then
        exit 1
      fi
      [ $quiet != "true" ] && printf "\n"
    else
      [ $quiet != "true" ] && printf "\n"
    fi
  else
    echo "Unknown status '$status'. Complete output returned from the AWS api:" 1>&2
    cat $tmpout 1>&2
    exit 1
  fi
fi
exit 0