Docker Manager

Docker container lifecycle management. Use when: user asks to list containers, start/stop containers, view logs, check stats, prune unused containers or images. Requires Docker CLI installed.

Docker Manager Skill

Manage Docker containers, images, and system resources.

Triggers

• "docker containers", "list containers"
• "start container", "stop container"
• "docker logs", "container logs"
• "docker stats", "container stats"
• "docker prune", "cleanup containers"
• "docker images", "list images"

Commands

List Running Containers

bash

docker ps

List All Containers (including stopped)

bash

docker ps -a

Start a Container

bash

docker start <container_id_or_name>

Stop a Container

bash

docker stop <container_id_or_name>

Restart a Container

bash

docker restart <container_id_or_name>

View Container Logs

bash

# Tail last 100 lines
docker logs --tail 100 <container_id_or_name>

# Follow logs in real-time
docker logs -f <container_id_or_name>

Container Stats (CPU, Memory, Network)

bash

# Stream stats for all running containers
docker stats

# Stats for specific container
docker stats <container_id_or_name>

# Non-streaming (one-time)
docker stats --no-stream <container_id_or_name>

List Docker Images

bash

docker images

Prune Unused Containers

bash

# Remove all stopped containers
docker container prune -f

Prune Unused Images

bash

# Remove dangling images
docker image prune -f

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

Docker System DF (Disk Usage)

bash

docker system df

Bundled Scripts

docker-stats.sh

Script for formatted container stats output.

bash

#!/bin/bash
# Docker container stats with formatted output

echo "Container Stats"
echo "==============="
docker stats --no-stream --format "table {{.Name}}\t{{.CPUPerc}}\t{{.MemUsage}}\t{{.NetIO}}\t{{.BlockIO}}"

Usage Examples

Intent	Command
List running containers	docker ps
List all containers	docker ps -a
Start nginx container	docker start nginx
Stop nginx container	docker stop nginx
View webapp logs	docker logs --tail 50 webapp
Monitor stats	docker stats
List images	docker images
Cleanup unused containers	docker container prune -f
Cleanup unused images	docker image prune -a -f
Check disk usage	docker system df