Docker: Unknown – Unable to query docker version: x509: certificate is valid for

 

I was playing around with Docker locally and somehow ended up with this error when I tried to list my docker machines:

$ docker-machine ls

NAME ACTIVE DRIVER STATE URL SWARM DOCKER ERRORS

default - virtualbox Running tcp://192.168.99.101:2376 Unknown Unable to query docker version: Get https://192.168.99.101:2376/v1.15/version: x509: certificate is valid for 192.168.99.100, not 192.168.99.101

My Google Fu was weak I couldn't find any suggestions for what this might mean so I tried shutting it down and starting it again!

On the restart I actually got some helpful advice:

$ docker-machine stop

Stopping "default"...

Machine "default" was stopped.

$ docker-machine start

Starting "default"...

(default) Check network to re-create if needed...

(default) Waiting for an IP...

Machine "default" was started.

Waiting for SSH to be available...

Detecting the provisioner...

Started machines may have new IP addresses. You may need to re-run the `docker-machine env` command.

$ docker-machine env

Error checking TLS connection: Error checking and/or regenerating the certs: There was an error validating certificates for host "192.168.99.101:2376": x509: certificate is valid for 192.168.99.100, not 192.168.99.101

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.

 

 

 

So I tried that:

And then regenerates my certificates:

$ docker-machine regenerate-certs

Regenerate TLS machine certs? Warning: this is irreversible. (y/n): y

Regenerating TLS certificates

Waiting for SSH to be available...

Detecting the provisioner...

Copying certs to the local machine directory...

Copying certs to the remote machine...

Setting Docker configuration on the remote daemon...

And now everything is happy again!

$ docker-machine ls

NAME ACTIVE DRIVER STATE URL SWARM DOCKER ERRORS

default - virtualbox Running tcp://192.168.99.101:2376 v1.9.0

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来自：http://www.markhneedham.com/blog/2016/12/21/docker-unknown-unable-to-query-docker-version-x509-certificate-is-valid-for/

 

说明：

1. 如果有多台虚机的时候，需要在命令的后面加机器名。
2. 直接运行docker-machine env或者regenerate-certs可能不行，会报连接不上的错误，那么就从头执行：stop->start->env->regenerate-certs.