[英]How to expose Docker TCP socket on WSL2? (WSL-installed Docker, not Docker Desktop)
我想通过 PyCharm 连接到在 WSL2 中运行的 Docker TCP 套接字。我似乎无法公开套接字,我想可能是因为 WSL2 (systemctl) 中对 docker-daemon 的控制有限? 我不能使用 Docker 桌面,因为我需要 GPU 支持(Windows Dev Channel + nvidia-docker)。 我试过以下方法:
$ 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
我希望最终命令给出类似{"Version":"17.05.0-ce","ApiVersion":"...}
的结果,但连接被拒绝。事实上,如果我尝试通过 Windows 主机 Pycharm 连接,它会拒绝连接. 我也看到很多教程/SO 帖子说不要使用这种 DOCKER_HOST 方法,但我不确定为什么。
根据stackoverflow 、 serverfault 、 ivankrizsan ,我使用/lib/systemd/system/docker.service
ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock -H tcp://0.0.0.0:2375
。 但是当我尝试systemctl daemon-reload
时出错; 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(Powershell wsl --shutdown
,重新打开 WSL2),以防 docker-daemon 拾取那些更改,但没有雪茄。
$ curl http://localhost:2375/version
curl: (7) Failed to connect to localhost port 2375: Connection refused
根据stackoverflow ,我使用DOCKER_OPTS="-H unix:// -H tcp://0.0.0.0:2375"
编辑/etc/default/docker
docker,然后sudo service docker restart
。 相同的连接被拒绝错误。
从要点
/etc/docker/daemon.json
{"hosts": ["tcp://0.0.0.0:2375", "unix:///var/run/docker.sock"]}
sudo service docker restart
TLS 支持:更详细的 serverfault 分步博客文章。 如果您要在服务器上设置 Docker,我建议您关注博文。 对我来说,我只想要 WSL2 中的 Docker、Windows (PyCharm) 可访问的套接字和 TLS 安全。 所以我的修改使用~/.docker
和localhost
(而不是根文件夹和 FQDN)。 这是我的步骤:
/etc/docker/daemon.json
"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~/.docker/certs
而不是/etc/docker/certs
。 即使使用chmod -v 0444 x
尝试,我也遇到了 PyCharm 需要访问“证书文件夹”的权限障碍。
$ 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)
sudo service docker restart
https://localhost:2376
\\wsl$\Ubuntu-18.04\home\lefnire\.docker\certs
就我而言,问题是
-H fd://
由无法加载侦听器修复
tail -f /var/log/docker.log
无法加载侦听器:通过套接字激活找不到 sockets:确保服务由 systemd 启动
/lib/systemd/system/docker.service
,将fd://替换为unix://Docker Desktop 通过代理将 docker.sock 作为 Windows 中的命名管道公开,我认为这是最安全、最方便的连接方式。 因此,对于没有 Docker 桌面的环境,我编写了一个小代理应用程序并将其打包为一个容器。 这样就像执行“docker run”来安装它一样简单。
在此处阅读更多相关信息https://devopsifyme.com/how-to-install-and-connect-to-docker-on-wsl/
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