Docker container stopper. Allows you to close various containers that continue to work for more than a certain time.

stopper.sh

#!/bin/bash

setup_logger() {
    local path="$1"
    exec 3>&1 4>&2
    exec 1>>"$path" 2>&1
}

log() {
    local message="$1"
    echo "$(date '+%Y-%m-%d %H:%M:%S %z') - $message"
}

stop_old_containers() {
    local image_name="$1"
    local container_lifetime="$2"

    current_time=$(date -u +%s)
    local container_ids
    container_ids=$(docker ps --filter ancestor="$image_name" --format "{{.ID}}")

    for container_id in $container_ids; do
        created_at=$(docker inspect -f '{{.Created}}' "$container_id" | cut -d '.' -f1)
        created_at_unix=$(date -d "$created_at" -u +%s)
        how_long_exist=$((current_time - created_at_unix))

        if ((how_long_exist >= container_lifetime)); then
            command=$(docker inspect -f '{{.Config.Cmd}}' "$container_id")
            log "Stopping container $container_id: $command"
            docker stop "$container_id"
        fi
    done
}

main() {
    local log_file='/var/log/helpers/stopper.log'                          # default path to log file
    local images='parsers-python|parsers-php|parsers-go|parsers-selenium'  # default images
    local lifetime=1200                                                    # default lifetime is 20 minutes

    while [[ $# -gt 0 ]]; do
        case $1 in
            -i|--images)
                images="$2"
                shift
                ;;
            -lt|--lifetime)
                lifetime="$2"
                shift
                ;;
            --log)
                log_file="$2"
                shift
                ;;
            *)
                log "Unknown option: $1"
                exit 1
                ;;
        esac
        shift
    done

    setup_logger "$log_file"

    IFS='|' read -ra image_list <<< "$images"
    for image_name in "${image_list[@]}"; do
        log "Start checking containers by $image_name image"
        stop_old_containers "$image_name" "$lifetime"
    done

    log "Done!"
}

main "$@"