docker toolbox Error response from daemon: Get https://registry-1.docker.io/v2/: x509: certific ate signed by unknown authority

Question

I'm having error when trying to pull any images from docker hub. I use docker toolbox community edition on windows 8.1

Ex: when trying to pull images with command: docker pull ubuntu I get error response like this:

Error response from daemon: Get https://registry-1.docker.io/v2/: x509: certificate signed by unknown authority

Note: I get the same error when trying login from docker quick terminal.

:

Answer 1

If your OS is RHEL/Centos than follow this :

Step 1: Login as root user

Step 2: Create a directory.

   $ mkdir -p  /etc/pki/ca-trust/source/anchors
   $ cd /etc/pki/ca-trust/source/anchors

Step 3: Download the DTR/Registry CA certificate.

   $ curl -k https://registry-1.docker.io/ca -o /etc/pki/ca-
     trust/source/anchors/registry-1.docker.io.crt
   $ ls -ltr
   root@centos:/etc/pki/ca-trust/source/anchors# ls -ltr
   -rw-r--r-- 1 root root 2000 May  3 10:38 registry-1.docker.io.crt
   $ chmod +x /etc/pki/ca-trust/source/anchors/registry-1.docker.io.crt

Step 4: Refresh the list of certificates to trust.

     $ sudo update-ca-trust

Step 5: Restart the Docker Daemon.

     $ systemctl restart docker.service

Step 6: Verification

  $ docker login https://registry-1.docker.io/
  Username: your-user-name
  Password:
  Login Succeeded

Answer 2

The problem for me is because of the mirror source:

{
  "debug": true,
  "experimental": false,
  "registry-mirrors": ["http://hub-mirror.c.163.com"],
  "insecure-registries":["registry-1.docker.io"]
}

Partial modification of Docker Engine; And about version:

enter image description here