Docker 入門
Docker はじめの一歩
Docker の動作確認
Windows や Mac では Docker Desktop アプリを起動した状態でコマンドラインインタフェース (CLI) を利用します．例えば Docker のバージョンを確認します．エラーが表示された場合は Docker のインストールと Docker Desktop の起動状態を確認してください．
% docker --version ⏎
Docker version 28.3.3, build 980b856
次のコマンドではイメージやコンテナなどが利用しているストレージ使用量を確認できます．まだコンテナを利用していないので，使用量は0バイトになっています．
% docker system df ⏎
TYPE TOTAL ACTIVE SIZE RECLAIMABLE
Images 0 0 0B 0B
Containers 0 0 0B 0B
Local Volumes 0 0 0B 0B
Build Cache 0 0 0B 0B
Docker のシステム情報を確認してみましょう．
% docker system info ⏎
Client:
Version: 28.3.3
Context: desktop-linux
Debug Mode: false
Plugins:
ai: Docker AI Agent - Ask Gordon (Docker Inc.)
Version: v1.9.11
Path: /Users/rinsaka/.docker/cli-plugins/docker-ai
buildx: Docker Buildx (Docker Inc.)
Version: v0.27.0-desktop.1
Path: /Users/rinsaka/.docker/cli-plugins/docker-buildx
cloud: Docker Cloud (Docker Inc.)
Version: v0.4.21
Path: /Users/rinsaka/.docker/cli-plugins/docker-cloud
compose: Docker Compose (Docker Inc.)
Version: v2.39.2-desktop.1
Path: /Users/rinsaka/.docker/cli-plugins/docker-compose
debug: Get a shell into any image or container (Docker Inc.)
Version: 0.0.42
Path: /Users/rinsaka/.docker/cli-plugins/docker-debug
desktop: Docker Desktop commands (Docker Inc.)
Version: v0.2.0
Path: /Users/rinsaka/.docker/cli-plugins/docker-desktop
extension: Manages Docker extensions (Docker Inc.)
Version: v0.2.31
Path: /Users/rinsaka/.docker/cli-plugins/docker-extension
init: Creates Docker-related starter files for your project (Docker Inc.)
Version: v1.4.0
Path: /Users/rinsaka/.docker/cli-plugins/docker-init
mcp: Docker MCP Plugin (Docker Inc.)
Version: v0.15.0
Path: /Users/rinsaka/.docker/cli-plugins/docker-mcp
model: Docker Model Runner (EXPERIMENTAL) (Docker Inc.)
Version: v0.1.39
Path: /Users/rinsaka/.docker/cli-plugins/docker-model
sbom: View the packaged-based Software Bill Of Materials (SBOM) for an image (Anchore Inc.)
Version: 0.6.0
Path: /Users/rinsaka/.docker/cli-plugins/docker-sbom
scout: Docker Scout (Docker Inc.)
Version: v1.18.3
Path: /Users/rinsaka/.docker/cli-plugins/docker-scout
WARNING: Plugin "/Users/rinsaka/.docker/cli-plugins/docker-dev" is not valid: failed to fetch metadata: fork/exec /Users/rinsaka/.docker/cli-plugins/docker-dev: no such file or directory
WARNING: Plugin "/Users/rinsaka/.docker/cli-plugins/docker-feedback" is not valid: failed to fetch metadata: fork/exec /Users/rinsaka/.docker/cli-plugins/docker-feedback: no such file or directory
Server:
Containers: 0
Running: 0
Paused: 0
Stopped: 0
Images: 0
Server Version: 28.3.3
Storage Driver: overlay2
Backing Filesystem: extfs
Supports d_type: true
Using metacopy: false
Native Overlay Diff: true
userxattr: false
Logging Driver: json-file
Cgroup Driver: cgroupfs
Cgroup Version: 2
Plugins:
Volume: local
Network: bridge host ipvlan macvlan null overlay
Log: awslogs fluentd gcplogs gelf journald json-file local splunk syslog
CDI spec directories:
/etc/cdi
/var/run/cdi
Discovered Devices:
cdi: docker.com/gpu=webgpu
Swarm: inactive
Runtimes: io.containerd.runc.v2 runc
Default Runtime: runc
Init Binary: docker-init
containerd version: 05044ec0a9a75232cad458027ca83437aae3f4da
runc version: v1.2.5-0-g59923ef
init version: de40ad0
Security Options:
seccomp
Profile: builtin
cgroupns
Kernel Version: 6.10.14-linuxkit
Operating System: Docker Desktop
OSType: linux
Architecture: aarch64
CPUs: 8
Total Memory: 7.654GiB
Name: docker-desktop
ID: a6c0feb5-83e8-4e29-acc2-d73ab8973600
Docker Root Dir: /var/lib/docker
Debug Mode: false
HTTP Proxy: http.docker.internal:3128
HTTPS Proxy: http.docker.internal:3128
No Proxy: hubproxy.docker.internal
Labels:
com.docker.desktop.address=unix:///Users/rinsaka/Library/Containers/com.docker.docker/Data/docker-cli.sock
Experimental: false
Insecure Registries:
hubproxy.docker.internal:5555
::1/128
127.0.0.0/8
Live Restore Enabled: false