If an update to a Docker image in
a virtual system instance is
available, you can apply the update from the Instance Console.
Before you begin
Ensure that the updated Docker image is
available in the Docker registry.
Depending on the system's configuration, the Docker registry is
either the Docker Hub or
a private Docker registry that
runs on Cloud Pak System Software.
About this task
When you apply an updated image to an existing virtual system instance,
the system shuts down the current Docker container and
starts it again with the updated Docker image.
This process uses rolling updates. If there are multiple Docker containers that
are based on the image that you specify to update in the instance,
the Docker containers are
divided into two groups. While one group is being updated, the Docker containers in
the other group are running to prevent service loss.Procedure
- Click .
- Select the instance that includes the Docker container with
the Docker image that
you want to update.
- Click Manage.
- Click Operations.
- Select DockerContainer.
- Expand the Update image section.
- Select the Docker image that
you want to use for update from the Updatable images field.
Note: If no Docker images are
listed, no images are available for update for the selected Docker container.
- Click Submit.
Results
The update is applied by using a rolling method. You can monitor
the results in the Operation Execution Results section
of the page.