RaspberryPiのDockerでRemoteAPIを有効化する

Dockerのインストール

ここの内容でインストールを行う
curl -sSL https://get.docker.com | sh

バージョン確認

 docker version
Client:
 Version:      17.04.0-ce
 API version:  1.28
 Go version:   go1.7.5
 Git commit:   4845c56
 Built:        Mon Apr  3 18:22:23 2017
 OS/Arch:      linux/arm

Server:
 Version:      17.04.0-ce
 API version:  1.28 (minimum version 1.12)
 Go version:   go1.7.5
 Git commit:   4845c56
 Built:        Mon Apr  3 18:22:23 2017
 OS/Arch:      linux/arm
 Experimental: false

RemoteAPI有効化

以下のとおり変更

/lib/systemd/system/docker.service

# ExecStart=/usr/bin/dockerd -H fd://
ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:4243 -H unix:///var/run/docker.sock

Serviceのリロード・再起動

daemon-reloadをしっかり行わないと反映されない

systemctl daemon-reload
service docker restart

API確認

curl http://localhost:4243/version
{"Version":"17.04.0-ce","ApiVersion":"1.28","MinAPIVersion":"1.12","GitCommit":"4845c56","GoVersion":"go1.7.5","Os":"linux","Arch":"arm","KernelVersion":"4.4.34-v7+","BuildTime":"2017-04-03T18:22:23.595577260+00:00"}