Docker¶

In the menu item Docker you can enable or disable the docker feature.

Enable docker¶

Mount SD Card¶

Before we can enable Docker is necessary to mount the SD Card to the CMTK, that means the SD Card is recognized by the CMTK as a valid storage for Docker.

1. Plug the SD Card to the CMTK.

   Note

   Click on the Refresh button to scan the SD Card.

   

2. Click on Mount SD Card

   To use the SD Card, it has to be mounted.

   

3. Format SD Card

   Enter a passphrase to format the SD Card.

   Note

   Record the passphrase and keep it securely. This passphrase is also required for logging into the Portainer.

   Note

   The SD Card will be formatted with the passphrase. All data on the Card will be lost. It can take a few minutes until Portainer starts after the formatting.

   

Turn on Docker¶

After formatting the SD Card, you can enable Docker by clicking on the Docker enabled button.

Docker is now activated.

If you now click on Open Portainer, another window with Portainer opens. The username is admin and the password is the entered CMTK-PASSPHRASE. Further documentation on Portainer can be found here: Deploy your first container

Eject SD Card¶

If you like to eject the SD Card, you have to click the "eject" button in the Docker menu. After clicking "eject", this dialog will show up.

You have to click on Eject SD card to eject the SD Card.

Now you can safely remove the SD Card from the CMTK.

SD Card could not be mounted¶

In case this message pops up, you connected an SD Card with an other passphrase then the passphrase of the device. There are two possibilities to solve it.

1. Enter the correct passphrase

   Click on Change passphrase and enter the right passphrase for the SD Card.

   

   Note

   Record the passphrase and keep it securely.

   After saving the right passphrase, the Docker menu will be displayed.

2. Format the SD Card like it is explained here.

   Note

   All data on the SD Card will be lost.