Why? Because we’ve created persistent volumes that automount upon a container restart. If you stop that running container (using the command docker stop CONTAINERID – where CONTAINERID is the ID of our new container), you can then restart it (with the docker-compose up -d command), and everything should be exactly as you left it. Now, if you log back into your server and issue the command ls /mnt/wp-data, you should see that directory has been populated with files and sub-directories. Give the container time to deploy and, once it has, visit (where SERVER is the IP address of the hosting server) and you should be directed to the WordPress setup ( Figure A).įigure A The WordPress setup is ready for you to complete the task. That is where we’ve defined our volumes for the container.ĭeploy the Nextcloud container with the command: What we’ll do now is create a docker-compose.yml file and create the necessary manifest for a WordPress container deployment. Sudo chmod +x /usr/local/bin/docker-compose Give the newly-downloaded binary the proper permissions with the command: ![]() Make sure to visit the Docker Compose download page to ensure you’re downloading the latest version of the binary. Sudo curl -L "$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose In order to do this right, let’s first install Docker Compose. Sudo mkdir /mnt/wp-data How to deploy the containers We’ll call this directory wp-data and create the directory with the command: The first thing we’re going to do is create the directory that will house the data for a WordPress container. I’ll be demonstrating on Ubuntu Server 20.04, but it doesn’t matter the platform, so long as Docker is working properly. To make this work, you’ll need a machine with a running instance of the Docker engine. SEE: Kubernetes: A cheat sheet (free PDF) (TechRepublic)īut what happens when you do eventually restart that Docker container? Will the volume housing the data still be there when the container comes back up? Let’s walk through the steps for creating and using a volume such that it will always be there for your Docker container deployment. Not only do you want to give that container enough storage space to house all of the data it will require (especially as it scales), you want to make sure that data remains in play, even after the container is stopped or restarted. Say, for example, you’re deploying a WordPress instance via a Docker container. ![]() The primary reason is to ensure persistent storage. There are so many reasons you want to use volumes for your container deployments. Tech Takes Diverse Approaches to Sustainability Including Net Zero Carbon by 2030 Impact of Recent Australian Data Centre Outages on Businesses and Risk Mitigation Image: o_m/Shutterstock More about data centers Looking to add persistent storage for your Docker container deployments? Jack Wallen shows you how, by way of a WordPress example. How to automount volumes for Docker containers
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