如何在WSL2上公开Docker TCP套接字？（WSL安装的Docker，而不是Docker Desktop）

Question

我想通过PyCharm连接到在WSL2中运行的Docker TCP套接字。我似乎不能公开套接字，我想可能是因为WSL2（system ctl）中对docker-daemon的控制有限？我不能使用Docker Desktop，因为我需要GPU支持（Windows Dev Channel nvidia-docker）。我尝试了以下方法：

$ export DOCKER_HOST=tcp://0.0.0.0:2375
$ sudo service docker restart
$ docker context ls
NAME                DESCRIPTION                               DOCKER ENDPOINT      KUBERNETES ENDPOINT   ORCHESTRATOR
default *           Current DOCKER_HOST based configuration   tcp://0.0.0.0:2375                         swarm
Warning: DOCKER_HOST environment variable overrides the active context. To use a context, either set the global --context flag, or unset DOCKER_HOST environment variable.
$ curl --unix-socket /var/run/docker.sock http:/localhost/version
{"Platform":{"Name":"Docker Engine - Community"},"Components":[{"Name":"Engine","Version":"19.03.11","Details":{"ApiVersion":"1.40","Arch":"amd64","BuildTime":"2020-06-01T09:10:54.000000000+00:00","Experimental":"false","GitCommit":"42e35e61f3","GoVersion":"go1.13.10","KernelVersion":"4.19.121-microsoft-standard","MinAPIVersion":"1.12","Os":"linux"}},{"Name":"containerd","Version":"1.2.13","Details":{"GitCommit":"7ad184331fa3e55e52b890ea95e65ba581ae3429"}},{"Name":"runc","Version":"1.0.0-rc10","Details":{"GitCommit":"dc9208a3303feef5b3839f4323d9beb36df0a9dd"}},{"Name":"docker-init","Version":"0.18.0","Details":{"GitCommit":"fec3683"}}],"Version":"19.03.11","ApiVersion":"1.40","MinAPIVersion":"1.12","GitCommit":"42e35e61f3","GoVersion":"go1.13.10","Os":"linux","Arch":"amd64","KernelVersion":"4.19.121-microsoft-standard","BuildTime":"2020-06-01T09:10:54.000000000+00:00"}
$ curl http://localhost:2375/version
curl: (7) Failed to connect to localhost port 2375: Connection refused

最后一个命令我希望给出一个类似于{“Version”：“17.05.0-ce”，“ApiVersion”：“…}的结果，但是连接被拒绝。事实上，如果我尝试通过Windows主机Pycharm连接，它会拒绝连接。我也看到许多教程/SO帖子说不要使用这种DOCKER\u主机方法，但我不确定为什么。

根据stackoverflow，serverfault，ivankrizsan，我编辑了/lib/systemd/system/docker.service和ExecStart=/usr/bin/dockerd-H fd://--containerd=/run/containerd/containerd.sock-Htcp://0.0.0.0:2375。但是当我尝试重新加载systemctl守护进程时，它会出错；WSL2不支持systemctl命令（WSL/457）。

$ sudo systemctl daemon-reload
System has not been booted with systemd as init system (PID 1). Can't operate.

我还尝试重新启动WSL2（Powershellwsl--shutdown，重新打开WSL2），以防docker守护进程将接收到这些更改，但没有任何更改。

$ curl http://localhost:2375/version
curl: (7) Failed to connect to localhost port 2375: Connection refused

根据stackoverflow，我使用docker\u OPTS=“-H unix://-H”编辑了/etc/default/dockertcp://0.0.0.0:2375“然后sudo服务docker重新启动。相同的连接拒绝了错误。

Answer 1

来自Gist

{"hosts": ["tcp://0.0.0.0:2375", "unix:///var/run/docker.sock"]}

TLS支持：更详细的服务器故障，一步一步的博客文章。如果您在服务器上设置Docker，我建议您遵循博客文章。对我来说，我只想要WSL2中的Docker，Windows可访问的套接字（PyCharm）和TLS安全。所以我的修改使用~/. docker

"hosts": ["unix:///var/run/docker.sock", "tcp://0.0.0.0:2376"],
"tlscacert": "/home/lefnire/.docker/certs/ca.pem",
"tlscert": "/home/lefnire/.docker/certs/server-cert.pem",
"tlskey": "/home/lefnire/.docker/certs/server-key.pem",
"tlsverify": true

注意我使用的是~/.docker/certs而不是/etc/docker/certs。我遇到了PyCharm需要访问“证书文件夹”的权限障碍，即使尝试了chmod-v0444x。

$ mkdir ~/.docker/certs
$ cd ~/.docker/certs
$ openssl genrsa -aes256 -out ca-key.pem 4096  # enter passphrase
$ openssl req -new -x509 -days 365 -key ca-key.pem -sha256 -out ca.pem  # enter localhost at FQDN step
$ openssl genrsa -out server-key.pem 4096
$ openssl req -subj "/CN=localhost" -sha256 -new -key server-key.pem -out server.csr
$ openssl x509 -req -days 365 -sha256 -in server.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out server-cert.pem
$ echo subjectAltName = DNS:localhost,IP:127.0.0.1 >> extfile.cnf
$ echo extendedKeyUsage = serverAuth >> extfile.cnf
$ openssl x509 -req -days 365 -sha256 -in server.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out server-cert.pem -extfile extfile.cnf
$ openssl genrsa -out key.pem 4096
$ openssl req -subj '/CN=client' -new -key key.pem -out client.csr
$ echo extendedKeyUsage = clientAuth > extfile-client.cnf
$ openssl x509 -req -days 365 -sha256 -in client.csr -CA ca.pem -CAkey ca-key.pem -CAcreateserial -out cert.pem -extfile extfile-client.cnf

忽略openssl RAND错误（或修复它）

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