Linux

Linux Docker статус в MOTD

Скрипт выводит сводку по Docker при каждом входе по SSH: список контейнеров со статусом и портами, тома и сети. Команда ds для ручного вызова.

Требования

Docker установлен и запущен
Bash

Установка

cat > /etc/profile.d/docker-motd.sh << 'SCRIPT'
#!/bin/bash
# Docker status MOTD

[[ $- != *i* ]] && return
command -v docker &>/dev/null || return

C_RESET='\\033[0m'; C_BOLD='\\033[1m'; C_DIM='\\033[2m'
C_GREEN='\\033[32m'; C_RED='\\033[31m'; C_YELLOW='\\033[33m'
C_CYAN='\\033[36m'; C_BLUE='\\033[34m'; C_MAGENTA='\\033[35m'
C_WHITE='\\033[97m'; C_LINE='\\033[38;5;240m'

_hr() { printf "${C_LINE}  %-60s${C_RESET}
" "------------------------------------------------------------"; }

_docker_motd() {
    local hostname uptime_str mem_total mem_used mem_pct disk_used disk_total disk_pct os_name
    hostname=$(hostname -f 2>/dev/null || hostname)
    uptime_str=$(uptime -p 2>/dev/null | sed 's/up //')
    read -r mem_total mem_used <<< "$(free -m | awk '/^Mem:/ {print $2, $3}')"
    mem_pct=$(( mem_used * 100 / mem_total ))
    read -r disk_used disk_total disk_pct <<< "$(df -h / | awk 'NR==2 {print $3, $2, $5}')"
    os_name=$(. /etc/os-release 2>/dev/null && echo "$PRETTY_NAME" || echo "Linux")

    echo ""
    printf "  ${C_BOLD}${C_CYAN}>>  %s${C_RESET}  ${C_DIM}|  %s  |  up %s${C_RESET}
" "$hostname" "$os_name" "$uptime_str"
    printf "  ${C_DIM}   RAM: ${C_WHITE}%s${C_DIM}/%sM (%s%%)  |  Disk: ${C_WHITE}%s${C_DIM}/%s (%s)${C_RESET}
" \\
        "$mem_used" "$mem_total" "$mem_pct" "$disk_used" "$disk_total" "$disk_pct"
    _hr

    printf "
  ${C_BOLD}${C_BLUE}>>  CONTAINERS${C_RESET}

"
    printf "  ${C_DIM}  %-18s %-20s %-14s %s${C_RESET}
" "NAME" "IMAGE" "STATUS" "PORTS"
    _hr

    docker ps -a --format '{{.Names}}|{{.Image}}|{{.Status}}|{{.Ports}}' 2>/dev/null | \\
    while IFS='|' read -r name image status ports; do
        local color="$C_GREEN" icon="*"
        [[ "$status" == *"Exited"* ]] && color="$C_RED" && icon="o"
        [[ "$status" == *"Restarting"* ]] && color="$C_YELLOW" && icon="~"
        status=$(echo "$status" | sed -E 's/ \\([^)]+\\)//g; s/Up /up /; s/Exited /exit /')
        [ ${#image} -gt 18 ] && image="${image:0:15}..."
        ports=$(echo "$ports" | sed -E 's/0\\.0\\.0\\.0://g; s/\\[::\\]://g; s|/tcp||g; s/, /,/g')
        [ -z "$ports" ] && ports="-"
        printf "  ${color}${icon}${C_RESET} ${C_WHITE}%-18s${C_RESET} ${C_DIM}%-20s${C_RESET} ${color}%-14s${C_RESET} ${C_MAGENTA}%s${C_RESET}
" \\
            "$name" "$image" "$status" "$ports"
    done

    echo ""
    printf "  ${C_BOLD}${C_BLUE}>>  VOLUMES${C_RESET}

"
    docker volume ls --format '{{.Name}}' 2>/dev/null | while read -r vname; do
        local size
        size=$(docker system df -v 2>/dev/null | awk -v n="$vname" '$1==n {print $3}')
        [ -z "$size" ] && size="-"
        printf "  ${C_CYAN}*${C_RESET} ${C_WHITE}%-35s${C_RESET} ${C_DIM}%s${C_RESET}
" "$vname" "$size"
    done

    echo ""
    printf "  ${C_BOLD}${C_BLUE}>>  NETWORKS${C_RESET}

"
    docker network ls --format '{{.Name}}|{{.Driver}}' 2>/dev/null | \\
    while IFS='|' read -r nname driver; do
        [[ "$nname" == "bridge" || "$nname" == "host" || "$nname" == "none" ]] && continue
        local containers
        containers=$(docker network inspect "$nname" --format '{{range .Containers}}{{.Name}} {{end}}' 2>/dev/null | xargs)
        [ -z "$containers" ] && containers="-"
        printf "  ${C_YELLOW}*${C_RESET} ${C_WHITE}%-25s${C_RESET} ${C_DIM}%-8s${C_RESET} -> ${C_GREEN}%s${C_RESET}
" \\
            "$nname" "$driver" "$containers"
    done

    echo ""
    _hr
    local total running stopped
    total=$(docker ps -aq 2>/dev/null | wc -l)
    running=$(docker ps -q 2>/dev/null | wc -l)
    stopped=$((total - running))
    printf "  ${C_DIM}Total: ${C_WHITE}%d${C_DIM}  |  * %d running" "$total" "$running"
    [ "$stopped" -gt 0 ] && printf "  |  o %d stopped" "$stopped"
    printf "${C_RESET}

"
}

ds() { _docker_motd; }
[ -n "$SSH_CONNECTION" ] || [ -n "$SSH_TTY" ] && _docker_motd
SCRIPT

chmod +x /etc/profile.d/docker-motd.sh

Ручное обновление

ds

Удаление

rm -f /etc/profile.d/docker-motd.sh

Примечания

Скрипт выполняется только в интерактивной SSH-сессии
Если MOTD не отображается — проверь PrintMotd в /etc/ssh/sshd_config
Команда ds доступна после перезахода в SSH или source /etc/profile.d/docker-motd.sh