Chapter 17. Managing containers by using the RHEL web console

Procedure

1. Click Podman containers in the main menu.
2. Click Create container.
3. In the Name field, enter the name of your container.

4. Provide desired info in the Details tab.

   • Available only with the administrative access: Select the Owner of the container: System or User.

   • In the Image drop down list select or search the container image in selected registries.

     • Optional. Check the Pull latest image checkbox to pull the latest container image.

   • The Command field specifies the command. You can change the default command if you need.

     • Optional. Check the With terminal checkbox to run your container with a terminal.
   • The Memory limit field specifies the memory limit for the container. To change the default memory limit, check the checkbox and specify the limit.
   • Available only for system containers: In the CPU shares field, specify the relative amount of CPU time. Default value is 1024. Check the checkbox to modify the default value.

   • Available only for system containers: In the Restart policy drop down menu, select one of the following options:

     • No (default value): No action.
     • On Failure: Restarts a container on failure.
     • Always: Restarts container when exits or after system boot.

5. Provide desired info in the Integration tab.

   • Click Add port mapping to add port mapping between container and host system.

     • Enter the IP address, Host port, Container port and Protocol.

   • Click Add volume to add volume.

     • Enter the host path, Container path. You can check the Writable checkbox to create a writable volume. In the SELinux drop down list, select one of the following options: No Label, Shared or Private.

   • Click Add variable to add environment variable.

     • Enter the Key and Value.

6. Provide desired info in the Health check tab.

   • In the Command fields, enter the healthcheck command.

   • Specify the healthcheck options:

     • Interval (default is 30 seconds)
     • Timeout (default is 30 seconds)
     • Start period
     • Retries (default is 3) for the healthcheck command
7. Click Create and run to create and run the container.

Procedure

1. Click Podman containers in the main menu.

2. Click the > arrow icon to see details of the container.

   • In the Details tab, you can see container ID, Image, Command, Created (timestamp when the container was created), and its State.

     • Available only for system containers: You can also see IP address, MAC address, and Gateway address.
   • In the Integration tab, you can see environment variables, port mappings, and volumes.
   • In the Log tab, you can see container logs.
   • In the Console tab, you can interact with the container using the command line.

Procedure

1. Click Podman containers in the main menu.

2. In the Containers table, select the container you want to modify and click the overflow menu and select the action you want to perform:

   • Start
   • Stop
   • Force stop
   • Restart
   • Force restart
   • Pause
   • Rename

Procedure

1. Click Podman containers in the main menu.
2. In the Containers table, select the container you want to modify and click the overflow menu and select Commit.

3. In the Commit container form, add the following details:

   • In the New image name field, enter the image name.
   • Optional: In the Tag field, enter the tag.
   • Optional: In the Author field, enter your name.
   • Optional: In the Command field, change command if you need.

   • Optional: Check the Options you need:

     • Pause container when creating image: The container and its processes are paused while the image is committed.
     • Use legacy Docker format: if you do not use the Docker image format, the OCI format is used.
4. Click Commit.

Procedure

1. Click Podman containers in the main menu.
2. In the Containers table, select the container you want to modify and click the overflow icon menu and select Checkpoint.

3. Optional. In the Checkpoint container form, check the options you need:

   • Keep all temporary checkpoint files: keep all temporary log and statistics files created by CRIU during checkpointing. These files are not deleted if checkpointing fails for further debugging.
   • Leave running after writing checkpoint to disk: leave the container running after checkpointing instead of stopping it.
   • Support preserving established TCP connections
4. Click Checkpoint.

Procedure

1. Click Podman containers in the main menu.
2. In the Containers table, select the container you want to modify and click the overflow menu and select Restore.

3. Optional. In the Restore container form, check the options you need:

   • Keep all temporary checkpoint files: Keep all temporary log and statistics files created by CRIU during checkpointing. These files are not deleted if checkpointing fails for further debugging.
   • Restore with established TCP connections
   • Ignore IP address if set statically: If the container was started with IP address the restored container also tries to use that IP address and restore fails if that IP address is already in use. This option is applicable if you added port mapping in the Integration tab when you create the container.
   • Ignore MAC address if set statically: If the container was started with MAC address the restored container also tries to use that MAC address and restore fails if that MAC address is already in use.
4. Click Restore.

Procedure

1. Click Podman containers in the main menu.
2. In the Containers table, select the container you want to delete and click the overflow menu and select Delete.
3. The pop-up window appears. Click Delete to confirm your choice.

Procedure

1. Click Podman containers in the main menu.
2. Click Create pod.

3. Provide desired information in the Create pod form:

   • Available only with the administrative access: Select the Owner of the container: System or User.
   • In the Name field, enter the name of your container.

   • Click Add port mapping to add port mapping between container and host system.

     • Enter the IP address, Host port, Container port and Protocol.

   • Click Add volume to add volume.

     • Enter the host path, Container path. You can check the Writable checkbox to create a writable volume. In the SELinux drop down list, select one of the following options: No Label, Shared or Private.
4. Click Create.

Procedure

1. Click Podman containers in the main menu.
2. Click Create container in pod.
3. Follow the steps 3.-8. in Creating containers in the web console.

Procedure

1. Click Podman containers in the main menu.

2. In the Containers table, select the pod you want to modify and click the overflow menu and select the action you want to perform:

   • Start
   • Stop
   • Force stop
   • Restart
   • Force restart
   • Pause

Procedure

1. Click Podman containers in the main menu.
2. In the Containers table, select the pod you want to delete and click the overflow menu and select Delete.
3. The pop-up window appears. Click Delete to confirm your choice.