Cleanup docker

#!/bin/bash

# Get the current date in seconds since the epoch
NOW=$(date +%s)

# Define the threshold for 6 months in seconds (approximately)
SIX_MONTHS=15552000

# List all containers with status exited
docker ps -a --filter "status=exited" --format "{{.ID}}" | while read -r id; do
    # Get the ExitTime in RFC3339 format using docker inspect
    exit_time=$(docker inspect --format='{{.State.FinishedAt}}' "$id")

    # Skip if exit_time is null
    if [ "$exit_time" == "" ] || [ "$exit_time" == "null" ]; then
        continue
    fi

    # Convert the container's exit time to seconds since epoch
    container_exit_date=$(date -d "$exit_time" +%s)

    # Calculate how long ago the container exited
    duration=$((NOW - container_exit_date))

    # Check if the container exited more than 6 months ago
    if [ "$duration" -gt "$SIX_MONTHS" ]; then
        echo "Removing container $id (exited on $exit_time)"
        docker rm "$id"
    fi
done

# Now prune all unused images
docker image prune -a -f