periodicDelete.sh

#!/bin/bash

########################################################################################
# This script is designed to be called with no arguments as a periodic cron job. It    #
# will check for instances that have been shut down, and delete them after a set time  #
# period elapses (currently, 4 weeks). They would have to be manually/automatically    #
# recreated to be spun up again.                                                       #
########################################################################################

#####################
# Exclusivity Check #
#####################

function finish {
  # Remove lock files
  rm -f ~/deployTestInstance.lock
}
trap finish EXIT



###############
# Basic Setup #
###############

# Echo out what we're doing
echo "Checking for any instances to delete (current time: $(date))."

# Enter the folder of instances
cd ~/CICD_TestInstances || { echo "Test Instances Folder Missing, Aborting."; exit 1; }

# Save current time
NOW=$(date +"%s")

# Calculate time offset. seconds * minutes * days * 4 weeks
(( TIMEOUT = 60*60*24*28 ))



##################
# Instance Check #
##################

# Loop through each folder and check if it's time to delete it
for entry in "."/*
do
  entry=${entry:2}
  echo "$entry"

  # Check the modified time
  INSTANCETIME=$(stat -c %Y "$entry")  # Checks the modified time of the instance folder

  # Compare
  (( DAYSOLD = ( ( NOW - INSTANCETIME ) / ( 60*60*24 ) ) ))
  echo "Instance is $DAYSOLD days old ($(stat -c %y "$entry"))."

  # Check if too old
  if (( ( NOW - INSTANCETIME ) > TIMEOUT )); then
      echo "Shutting down and deleting instance."

      # Enter the folder
      cd "$entry/PollBuddy" || { echo "Failed to cd into instance, aborting."; exit 1; }
      docker-compose -p "$entry" down -v
      docker-compose -p "$entry" rm -s -f -v

      cd ../../ || { echo "Failed to cd out of instance, aborting."; exit 1; }
      echo "Instance has been shut down and containers removed."

      # Delete the folder
      rm -rf "$entry"
      echo "Instance folder has been deleted."

  else
      echo "Instance does not need to be deleted."
  fi

  echo "---"

done

echo "Instance check complete on $(date)."



#######################
# Docker Data Cleanup #
#######################

echo "Cleaning up Docker Data..."
# Filter makes sure images are at least 2h old to prune (in case any builds are running)
docker image prune -f -a --filter "until=2h"
docker volume prune -f  # Doesn't support the filter for some reason, shouldn't really matter though
docker network prune -f --filter "until=2h"
echo "Docker Data cleanup complete on $(date)."



###########################
# Port Allocation Cleanup #
###########################

echo "Cleaning up old port allocations..."

# Enter the folder of instances ports
cd ~/dev-site-ports || { echo "Test Instances Ports Folder Missing, Aborting."; exit 1; }

# Loop over each file in the directory
for file in ./*
do
  ID=$(cat "$file")
  # Check if a folder exists that matches the ID
  if [ ! -d "$HOME/CICD_TestInstances/$ID" ]; then
    echo "Folder with ID of $ID DOES NOT exist, port should be deallocated."
    rm "$file"
  else
    echo "Folder with ID of $ID exists, port should be kept."
  fi
done

echo "Old port allocations cleanup complete on $(date)."



###########################
# Config File Cleanup #
###########################

echo "Cleaning up old config files..."

# Enter the folder of instances configs
cd ~/dev-site-configs || { echo "Test Instances Configs Folder Missing, Aborting."; exit 1; }

# Loop over each file in the directory
for file in ./*
do
  # Split the filename into just the ID by removing the first 2 chars (./) and last 5 (.conf)
  ID=${file:2:-5}
  # Check if a folder exists that matches the ID
  if [ ! -d "$HOME/CICD_TestInstances/$ID" ]; then
    echo "Folder with ID of $ID DOES NOT exist, config should be deleted."
    rm "$file"
  else
    echo "Folder with ID of $ID exists, config should be kept."
  fi
done

echo "Old config files cleanup complete on $(date)."



####################
# Restart Dev Site #
####################

# Talk about it
echo "Restarting dev site"

# Acquire the lock
lockfile -5 ~/deployTestInstance.lock

# Move over to the website folder
cd ~/PollBuddy.app/ || { echo "CD to PollBuddy.app Folder Failed, Aborting."; exit 1; }

# Restart dev site (instance configs are bind mounted, so we just need to restart nginx)
docker-compose restart

# We're done!
echo "Dev site restarted"



##########
# Finish #
##########

echo "Done!"

# Exit
exit 0