Allows you to rapidly identify and kill hung shinyproxy containers

killfailedshiny.sh

#!/bin/bash

# NOTE: UPDATE PATH TO LOG FILES ON LINE 10

# Prune all stopped containers 
echo "Prune all stopped/hung containers:"
docker container prune

# Search the log file for the last occurrence of the specified message
last_failed_bind=$(grep -Eo "Bind for 0.0.0.0:[0-9]+ failed: port is already allocated|listen tcp4 0.0.0.0:[0-9]+: bind: address already in use" /PATHTOLOGS/shinyproxy.log | tail -n 1)

# Extract the port number from the message (if found)
if [[ $last_failed_bind =~ ([0-9]+) ]]; then
  suggested_port=$(echo "$last_failed_bind" | grep -oP ':\K\d+')
fi

# Ask the user for the port number
read -p "Enter the port number (or press Enter to use suggested port $suggested_port): " user_port

# Use the suggested port if the user didn't provide one
if [ -z "$user_port" ]; then
  port="${suggested_port}"
else
  port="${user_port}"
fi

# Use docker ps to find the container using the specified port
container_name=$(docker ps --format "table {{.Names}}\t{{.Ports}}" | grep ":${port}->" | awk '{print $1}')

# Check if a container was found
if [ -n "$container_name" ]; then
  echo "Container using port $port: $container_name"

  # Prompt the user for confirmation before forcefully removing the container
  read -p "Do you want to forcefully remove this container? (y/n): " choice
  if [ "$choice" == "y" ]; then
    docker rm -f "$container_name"
    echo "Container removed."
  else
    echo "Container not removed."
  fi

else
  echo "No container found using port $port"
  
  # Try to identify the PID associated with the port
  pid=$(sudo lsof -n -i :$port -t)
  if [ -n "$pid" ]; then
    echo "Process using port $port has PID: $pid"
    
    # Display details of the process
    echo "Details of the process:"
    ps -p $pid -o pid,ppid,cmd,stat,stime,%cpu,%mem
    
    # Ask the user if they want to kill the process
    read -p "Do you want to kill this process? (y/n): " kill_choice
    if [ "$kill_choice" == "y" ]; then
      sudo kill -9 $pid
      echo "Process killed."
    else
      echo "Process not killed."
    fi
  else
    echo "No process found using port $port"
  fi
fi