Docker: could not read CA certificate
I had the same issue. The problem was, that I upgraded from Docker Toolbox to Docker for Windows. When you uninstall Docker Toolbox, the user-specific env variables get not removed. The following did the trick for me:
- Uninstall Docker Toolbox.
- Uninstall VirtualBox (You cannot use VirtualBox, as it is necessary for Docker Toolbox and Hyper-V [used by Docker for Windows] at the same time.)
- Remove the Docker Toolbox env variables:
- Go to Control Panel\All Control Panel Items\System.
- Click Advanced system settings
- Go to Advanced Tab and click Environment Variables.
- Delete all
DOCKER_*entries from System/User variables.DOCKER_TLS_VERIFYDOCKER_CERT_PATHDOCKER_HOSTDOCKER_TOOLBOX_INSTALL_PATH
Remove DOCKER_* from command-prompt or PowerShell. Run these command in PowerShell:
[Environment]::SetEnvironmentVariable("DOCKER_CERT_PATH", $null, "User")[Environment]::SetEnvironmentVariable("DOCKER_HOST", $null, "User")[Environment]::SetEnvironmentVariable("DOCKER_MACHINE_NAME", $null, "User")[Environment]::SetEnvironmentVariable("DOCKER_TLS_VERIFY", $null, "User")[Environment]::SetEnvironmentVariable("DOCKER_TOOLBOX_INSTALL_PATH", $null, "User")Restart PowerShell. (If necessary, restart system as well.)
Sources:
Environment variables hanging around from previously (long) removed Docker Toolbox installation caused this problem with Docker Desktop (which was started ok after HyperV. Removed them all, remove these environmental variables
- DOCKER_TLS_VERIFY
- DOCKER_CERT_PATH
- DOCKER_HOST
- DOCKER_TOOLBOX_INSTALL_PATH
, restart terminal, all working great now
Sometimes it's not that much tricky. I have just resolved this problem by doing this:
Go to THIS PC:-> in search bar type ca.pem -> and now go to that location and copy it-> now go to Advanced System Settings -> Environment Variables -> Edit - DOCKER_CERT_PATH -> and PASTE that location and by doing this it will run