docker-machine regenerate-certs 问题

Question

系统环境：
win10 + virtualbox5.0.24
docker,docker-machine版本

JYC103@Fanne MINGW64 ~
$ docker-machine.exe -version
docker-machine.exe version 0.7.0, build a650a40

JYC103@Fanne MINGW64 ~
$ docker version
Client:
 Version:      1.12.0
 API version:  1.24
 Go version:   go1.6.3
 Git commit:   8eab29e
 Built:        Thu Jul 28 23:54:00 2016
 OS/Arch:      windows/amd64
An error occurred trying to connect: Get http://%2F%2F.%2Fpipe%2Fdocker_engine/v1.24/version: open //./pipe/docker_engine: The system cannot find the file specified.

现在docker-machine上有一台docker主机

$ docker-machine.exe ls
NAME            ACTIVE   DRIVER      STATE     URL                         SWARM   DOCKER    ERRORS
docker.20.127   -        none        Running   tcp://192.168.20.127:2375           Unknown   Unable to query docker version: Unable to read TLS config: open C:\Users\JYC103\.docker\machine\machines\docker.20.127\server.pem: The system cannot find the file specified.

直接docker info 这台docker主机

$ docker -H 192.168.20.127:2375 info
Containers: 0
 Running: 0
 Paused: 0
 Stopped: 0
Images: 0
Server Version: 1.12.0
Storage Driver: devicemapper
 Pool Name: docker-253:1-101251423-pool
 Pool Blocksize: 65.54 kB
 Base Device Size: 10.74 GB
 Backing Filesystem: xfs
 Data file: /dev/loop0
 Metadata file: /dev/loop1
 Data Space Used: 11.73 MB
 Data Space Total: 107.4 GB
 Data Space Available: 14.84 GB
 Metadata Space Used: 581.6 kB
 Metadata Space Total: 2.147 GB
 Metadata Space Available: 2.147 GB
 Thin Pool Minimum Free Space: 10.74 GB
 Udev Sync Supported: true
 Deferred Removal Enabled: false
 Deferred Deletion Enabled: false
 Deferred Deleted Device Count: 0
 Data loop file: /var/lib/docker/devicemapper/devicemapper/data
 WARNING: Usage of loopback devices is strongly discouraged for production use. Use `--storage-opt dm.thinpooldev` to specify a custom block storage device.
 Metadata loop file: /var/lib/docker/devicemapper/devicemapper/metadata
 Library Version: 1.02.107-RHEL7 (2016-06-09)
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
 Volume: local
 Network: null host bridge overlay
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Security Options: seccomp
Kernel Version: 3.10.0-123.el7.x86_64
Operating System: CentOS Linux 7 (Core)
OSType: linux
Architecture: x86_64
CPUs: 1
Total Memory: 987.2 MiB
Name: localhost.localdomain
ID: FMPB:NCHQ:ERTQ:YQMK:WUSA:QA2T:FCQO:TL7L:IHOH:3Z3Z:EXTV:3YMY
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled
Insecure Registries:
 127.0.0.0/8

问题开始了
现在要docker-machine env查看一下docke.20.127主机的变量，出现以下提示

$ docker-machine.exe env docker.20.127
Error checking TLS connection: Error checking and/or regenerating the certs: There was an error validating certificates for host "192.168.20.127:2375": open C:\Users\JYC103\.docker\machine\machines\docker.20.127\server.pem: The system cannot find the file specified.
You can attempt to regenerate them using 'docker-machine regenerate-certs [name]'.
Be advised that this will trigger a Docker daemon restart which will stop running containers.

server.pem不存在，按照它的提示创建一个

$ docker-machine.exe regenerate-certs docker.20.127
Regenerate TLS machine certs?  Warning: this is irreversible. (y/n): y
Regenerating TLS certificates
Waiting for SSH to be available...
Too many retries waiting for SSH to be available.  Last error: Maximum number of retries (60) exceeded

但是等了几分钟后，没创建成功，打开debug调试

$ docker-machine.exe -D regenerate-certs docker.20.127
Docker Machine Version:  0.7.0, build a650a40
Regenerate TLS machine certs?  Warning: this is irreversible. (y/n): y
Regenerating TLS certificates
Found binary path at C:\Users\JYC103\bin\docker-machine.exe
Launching plugin server for driver none
Plugin server listening at address 127.0.0.1:58959
() Calling .GetVersion
Using API Version  1
() Calling .SetConfigRaw
() Calling .GetMachineName
command=configureAuth machine=docker.20.127
Waiting for SSH to be available...
Getting to WaitForSSH function...
(docker.20.127) Calling .GetSSHHostname
(docker.20.127) Calling .GetSSHPort
(docker.20.127) Calling .GetSSHKeyPath
(docker.20.127) Calling .GetSSHUsername
Using SSH client type: external
&{[-F /dev/null -o BatchMode=yes -o PasswordAuthentication=no -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o LogLevel=quiet -o ConnectionAttempts=3 -o ConnectTimeout=10 -o ControlMaster=no -o ControlPath=none @ -p 0] C:\Program Files\Git\usr\bin\ssh.exe <nil>}
About to run SSH command:
exit 0
SSH cmd err, output: exit status 255: usage: ssh [-1246AaCfGgKkMNnqsTtVvXxYy] [-b bind_address] [-c cipher_spec]
           [-D [bind_address:]port] [-E log_file] [-e escape_char]
           [-F configfile] [-I pkcs11] [-i identity_file]
           [-L address] [-l login_name] [-m mac_spec]
           [-O ctl_cmd] [-o option] [-p port]
           [-Q cipher | cipher-auth | mac | kex | key]
           [-R address] [-S ctl_path] [-W host:port]
           [-w local_tun[:remote_tun]] [user@]hostname [command]

Error getting ssh command 'exit 0' : Something went wrong running an SSH command!
command : exit 0
err     : exit status 255
output  : usage: ssh [-1246AaCfGgKkMNnqsTtVvXxYy] [-b bind_address] [-c cipher_spec]
           [-D [bind_address:]port] [-E log_file] [-e escape_char]
           [-F configfile] [-I pkcs11] [-i identity_file]
           [-L address] [-l login_name] [-m mac_spec]
           [-O ctl_cmd] [-o option] [-p port]
           [-Q cipher | cipher-auth | mac | kex | key]
           [-R address] [-S ctl_path] [-W host:port]
           [-w local_tun[:remote_tun]] [user@]hostname [command]

报ssh链接错误。
这问题要如何解决，要如何才能生成server.pem这个文件的？

Answer 1

What you added is the --driver none 的主机，因此只可以通过 Docker Remote API 操作。不可以SSH。而使用 docker-machine regenerate-certs 是需要 SSH 的。因此不支持。如果需要SSH，应该最初就是用 --driver generic driver, which is responsible for installing and configuring Docker.

As for the docker-machine env 报告 TLS 错误，这是因为所创建的 --driver none Docker host, in the records of docker-machine, TLS is deemed to have been configured and enabled by default (after all, this is the default security method). The specific key file should be passed as a parameter when creating the host. Assign, or directly modify the configuration file.

Judging from the port you showed previously2375, your Docker Host does not have any TLS protection, so it is inconsistent with the TLS enabled in the record. So when docker-machine tries to connect to this API, there is no local certificate, and TLS is not enabled on the remote server. Naturally, an error will be reported. Since TLS is enabled in the configuration, it is guessed that there is a problem with your certificate generation, and it is recommended to regenerate the certificate.

The solution is to generate TLS certificate configuration or modify it ~/.docker/machine/machines/<NAME>/config.json，将其中的 TlsVerify 改为 false.