Keep getting Could not read CA certificate when trying to start docker

could not read ca certificate the system cannot find the file specified.
docker toolbox
the path of ca certificate file must be not empty
how to start docker daemon docker toolbox
docker for windows
how to use docker quickstart terminal
docker virtualbox windows 10

I am attempting to migrate from boot2docker to docker-machine.

I followed the directions here to install docker but I keep getting the following message:

Could not read CA certificate "/Users/<useraccountfolder>/.boot2docker/certs/boot2docker-vm/ca.pem": open /Users/<useraccountfolder>/.boot2docker/certs/boot2docker-vm/ca.pem: no such file or directory

when I run most any docker command.

I found my solution here

I needed to update my .bash_profile to look like:

export DOCKER_HOST=tcp://
export DOCKER_MACHINE_NAME=default
export DOCKER_CERT_PATH=~/.docker/machine/machines/default

and then run the following to generate the missing ca.pem:

docker-machine regenerate-certs default

I posted this in case this could help anyone else. Thanks/props go to everyone in that thread on github which was found after an hour of pain.

Could not read CA certificate The system cannot find the file , Hi, First, I installed "docker toolbox for windows", and I could execute Could not read CA certificate The system cannot find the file specified #751. Open I tried to make a lot of completely docker removes and reinstall, but  Currently, there is no docker-machine create driver for HyperKit, so you will use virtualbox driver to create local machines. (See the Docker Machine driver for Oracle VirtualBox.) Note that you can run both HyperKit and Oracle VirtualBox on the same system. To learn more, see Docker for Mac vs. Docker Toolbox.

Please follow this guide: Docker for Mac vs Docker Toolbox

Worked for me, you need to unset the variables instead of creating them for mac.

# grep for DOCKER ENV vars env | grep DOCKER unset <DOCKER_VARS>

Docker: could not read CA certificate, Go to Advanced Tab and click Environment Variables. Delete all DOCKER_* entries from System/User variables. Restart PowerShell. (If necessary, restart system as well.) Re-using the docker environment on Fedora 25 fails (minishift docker-env) $ docker ps could not read CA certificate "/etc/docker/ca.pem": open /etc/docker/ca.pem

Usually most people have install boot2docker and old version of virtualbox. As said in installation guide, before installing Docker for Mac, we have to uninstall boot2docker and reinstall virtualbox to high version.

Even though we have installed Docker for Mac, we still encountered error "Could not read CA certificate".

My solution is to remove the docker related environment variables (DOCKER*) from .bash_profile. It seems a long term solution.

  1. vim ~/.bash_profile

  2. Comment something like DOCKER_*

  3. source ~/.bash_profile

  4. relaunch the terminal, you should have no problem on running : docker info or docker ps

Hope it helps.

[Docker for Windows] Certificate Error Solution, Problem Definition: After installing "Docker for Windows" on Windows 10 or lets say for eg. docker ps, you get following error: could not read CA certificate Now Close and Open Powershell again and now run docker ps it will work fine When trying to Remove DOCKER_* from command prompt or  When Kubernetes attempts to schedule containers using Docker, the Docker daemon may require external network access to pull containers. If you are behind an HTTP proxy, you may need to supply Docker with the proxy settings. To do this, pass the required environment variables as flags during minikube start.

I encountered the same error due to the reason that I had setup the environment to a particular docker machine which I later deleted but my environment was still set to the deleted machine. So docker calls were being redirected the a non-existant machine causing the error.

I unset the environment variables and the issue was fixed:

eval $(docker-machine env -u)

To see which environment variable would be unset run:

docker-machine env -u

Starter issues with docker on Windows - Docker Toolbox, Now, I get. Could not read CA certificate "C:\X\Y\Z\boo2docker-vm\ca.pem: The I can install it without error notes popping up, but when I try to run “docker run  Docker Toolbox is for older Mac and Windows systems that do not meet the requirements of Docker Desktop for Mac and Docker Desktop for Windows. We recommend updating to the newer applications, if possible. Estimated reading time: 6 minutes Typically, the QuickStart works out-of-the-box, but some scenarios can cause problems. Example errors

If the file is present in DOCKER_CERT_PATH env variable, the error could also be caused due to file permissions issue. Please check this use-case as well.

Keep getting Could not read CA certificate when trying to start docker, I am attempting to migrate from boot2docker to docker-machine. I followed the directions here to install docker but I keep getting the following message: Could  I just ran into the same issue because I run boot2docker on hardware and had to copy the certs generated by boot2docker to my machine. It worked for the Docker client but not for Docker Machine even though I manually set all the paths correctly in the AuthOptions section in config.json.

docker run hello-world "could not read CA certificate", Ask questionsdocker run hello-world "could not read CA certificate" But when i try start simple container: docker run hello-world I got: could not read CA variable "ErrorActionPreference" or common parameter is set to Stop: Generic failure  After I add the delegation and I am going on the collaborator's machine, I enable DOCKER_CONTENT_TRUST and push the image. I get the error: "Error: trust data missing for remote repository or remote repository not found: timestamp key trust data unavailable. Has a notary repository been initialized?"

Running Docker under Windows/cygwin environment, After Docker Toolbox install I'm trying to launch docker version in my docker version Could not read CA certificate more examples and ideas, visit: https://​ How can I prevent theft of mirrors? Swarm certificates automatically renew and have 90 day expiry period by default. Still, if you don't start the daemon during that time the certificates will expire and starting daemon will fail with time="2016-06-29T17:18:06.165656736Z"

Securing Docker with TLS certificates, Here I will detail what is required to secure Docker (and in turn Docker If you are only interested in securing Docker itself and not Docker Swarm First run openssl to create and sign a CA key and certificate and copy the Now when you try to access Docker via the TCP port you should get a TLS error: Cannot run docker from windows. #636. NimmiW opened this issue on Mar 18, 2017 · 96 comments. NimmiW commented on Mar 18, 2017. I installed docker windows toolkit and enabled the BIOS virtualization. docker version gives the following: Client: Version: 17.03.0-ce API version: 1.26 Go version: go1.7.5 Git commit: 60ccb22 Built: Thu Mar 2 01:11

  • If you will get No machine name(s) specified and no "default" machine exists error, follow instructions here
  • This worked for me. I am on Mac and incorrectly setup a docker machine even when I was using 'Docker for Mac'. I deleted the machine and the images were not getting built. worked after unsetting the variables.