docker 开启Remote API 访问 2375端口

常见docker端口包括：
2375：未加密的docker socket,远程root无密码访问主机
2376：tls加密套接字,很可能这是您的CI服务器4243端口作为https 443端口的修改
2377：群集模式套接字,适用于群集管理器,不适用于docker客户端
5000：docker注册服务
4789和7946：覆盖网络

如何配置2375 远程访问接口

在/usr/lib/systemd/system/docker.service，配置远程访问。

主要是在[Service]这个部分，加上下面两个参数

# vim /usr/lib/systemd/system/docker.service
[Service]
ExecStart=
ExecStart=/usr/bin/dockerd -H tcp://0.0.0.0:2375 -H unix://var/run/docker.sock
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重启

systemctl daemon-reload
systemctl restart docker
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简单使用

-H为连接目标主机docker服务

1.查看docker版本

docker -H tcp://127.0.0.1:2375 version
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输出：

Client:
Version:           20.10.12
API version:       1.41
Go version:        go1.16.2
Git commit:        20.10.12-0ubuntu2~20.04.1
Built:             Wed Apr  6 02:14:38 2022
OS/Arch:           linux/amd64
Context:           default
Experimental:      true

Server:
Engine:
 Version:          20.10.12
 API version:      1.41 (minimum version 1.12)
 Go version:       go1.16.2
 Git commit:       20.10.12-0ubuntu2~20.04.1
 Built:            Thu Feb 10 15:03:35 2022
 OS/Arch:          linux/amd64
 Experimental:     false
containerd:
 Version:          1.5.9-0ubuntu1~20.04.4
 GitCommit:
runc:
 Version:          1.0.0-rc10
 GitCommit:        dc9208a3303feef5b3839f4323d9beb36df0a9dd
docker-init:
 Version:          0.19.0
 GitCommit:
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2. 查看镜像包：

docker -H tcp://127.0.01:2375 images
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输出

REPOSITORY                         TAG             IMAGE ID       CREATED         SIZE
portainer/portainer-ce             2.14.2-alpine   3405981cd196   4 weeks ago     284MB
docker-compose_workers-web-redis   latest          52bc74ff6ad1   4 weeks ago     32.4MB
mysql-worker-mysql-image           latest          69478c610940   5 weeks ago     448MB
clickhouse/clickhouse-server       22.3            5619ba59bcfe   2 months ago    911MB
redis                              7.0-alpine      f934e82c14d1   2 months ago    28.4MB
zookeeper                          3.7.0           36c607e7b14d   8 months ago    278MB
mysql                              5.7             c20987f18b13   8 months ago    448MB
postgres                           14.1-alpine     2302d5724f71   8 months ago    209MB
redis                              alpine          3900abf41552   8 months ago    32.4MB
ubuntu                             latest          ba6acccedd29   10 months ago   72.8MB
confluentinc/cp-kafka              5.5.0           efc480c1c89c   10 months ago   598MB
nacos/nacos-server                 1.4.1           eec289123412   19 months ago   935MB
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