Update Docker

Updating TrueCommand installed in a Docker container requires stopping the existing container, obtaining the latest software image from the ixsystems/truecommand hub, and then starting an updated container using the existing TrueCommand storage volume.

This article provides command line instructions on how to do, but you can use different container management applications to accomplish the same task.

Log into the Docker host system for the container update process.

On Linux systems, you must run docker commands as the root account. You might need to add sudo to the front of the example command to run the command as root. Enter:

sudo docker image pull ixsystems/truecommand

To view all active containers, enter docker ps.

joe@joe-minty:~$ sudo docker ps
[sudo] password for joe:     
CONTAINER ID        IMAGE                          COMMAND                  CREATED             STATUS                   PORTS                           NAMES
d595961d9024        ixsystems/truecommand:latest   "/start.sh"              15 minutes ago      Up 15 minutes            443/tcp, 0.0.0.0:8080->80/tcp   TrueCmd_contained

For the rest of the examples in this article, we use TrueCmd_contained for the container name. Replace this with your TrueCommand container name.

You also need to note the path to the volume that the container uses for your TrueCommand configuration. You need to use this volume when starting the updated Docker container to continue using your existing TrueCommand configuration.

Before updating the container, create and store a copy of the container /data directory in a separate location. You can use this to restore the TrueCommand configuration and saved data in the event of an issue appearing during the update process. In a command line, cp the TrueCommand container /data directory to a different temporary or storage location: For example:

joe@joe-minty:~$ cp -r /home/joe/Documents/TrueCommandContainer/data /home/joe/temp/

If something goes wrong and you need to create a new container, you can remove the empty /data directory from the container and replace it with the previously saved TrueCommand configuration. For example:

joe@joe-minty:~$ rm -d /home/joe/Documents/NewTrueCommandContainer/data
joe@joe-minty:~$ cp -r /home/joe/temp/data /home/joe/Documents/NewTrueCommandContainer/

There are a few general Docker commands to remember when interacting with a TrueCommand container:

To start or stop the TrueCommand container, enter docker start <container name> or docker stop <container name> on the Docker host system.

To have the container automatically start when the Docker host system boots, ensure that the Docker daemon is configured to run at system boot and add the --restart flag to the initial docker run command. For example: docker run –name=the name to call the container> -v="local directory>:/data" -p :80 sslport :443 –detach –restart ixsystems/truecommand:latest

For a full history of every container that the host has run, use docker ps -a. For example:

joe@joe-minty:~$ sudo docker ps -a
[sudo] password for joe:     
CONTAINER ID        IMAGE                          COMMAND                  CREATED             STATUS                   PORTS                           NAMES
d595961d9024        ixsystems/truecommand:latest   "/start.sh"              15 minutes ago      Up 15 minutes            443/tcp, 0.0.0.0:8080->80/tcp   TrueCmd_contained
214a0275a216        phpmyadmin/phpmyadmin          "/docker-entrypoint.…"   7 weeks ago         Exited (0) 11 days ago                                   phpmyadmin
0a68db912cce        phpwork                "docker-php-entrypoi…"   4 months ago        Exited (0) 11 days ago                                   phpwork_1
d0ae8d0a839f        mysql:5.7                      "docker-entrypoint.s…"   4 months ago        Exited (0) 11 days ago                                   phpwork_mySQL_1

To update the docker container, download the latest TrueCommand image and remove the existing TrueCommand container. Then restart the container using the latest TrueCommand image and existing TrueCommand storage volume.

To remove the existing container, enter docker rm TrueCmd_contained. Next, run docker image pull ixsystems/truecommand.

By default, this pulls the latest image of TrueCommand to the Docker host. Start a new container that uses the new image, but make sure to use the existing volume used for the original TrueCommand container. For example: docker run –name the name to call the container> -v “local host directory:/data” -p :80 sslport :443 –detach ixsystems/truecommand:latest

Example without https:

sudo docker run --name TrueCmd_contained -v "/home/joe/Documents/TrueCommandContainer:/data" -p 8080:80 -d ixsystems/truecommand:latest

After creating the container, Docker uses the image previously downloaded with docker pull. You might need to refresh the screen to view the changes, but previous settings and systems remain available due to the volume reference.