With the default local driver the available options are the same as for mount and only tmpfs allows a size option. However, we can instruct it to remove the unused volumes using the –volumes option. AIUI docker volume create doesnt inherently have a size parameter but the storage driver may have options to specify the size. We should note that by default, this command doesn’t remove any volume to prevent data loss. Now, let’s remove the container and its image using the system prune child command: $ docker system prune -a -fĠcfeb6d3f7bdc8dc2e41d56987ff30b3e4a6c9b555c640a377ef38eb5fd3cdafĭeleted: sha256:fe7b1e9bf7922fbc22281bcc6b4f5ac8f1a7b4278929880940978c42fc9d0229Īs we can see, the command deletes the stopped container and the image associated with it to reclaim the disk space. In the bash prompt of the docker container df -k should show 20GB / file system size now. The devicemapper storage driver is commonly used on Red Hat installs. We’ll start by stopping the web-server-01 container that we created earlier: $ docker container stop web-server-01 This command removes all unused networks, images, containers, dangling build caches, and optionally, volumes. Use publish flag, -publish or -p, and add the following two lines to our docker run command to expose the port: -p 8086:8086 Persistent storage Next up, we’ll need to make some decisions about where we want our configuration files to live, and where we’re going to store container data for those containers that need it. That dropped my cache disk space usage to 0. To clear the build cache, run docker builder prune. prune commands and flags and they all missed clearing the cache. In my case, the build cache maxed out my allocated disk space of 128GB. In this example, you want a shared volume for multiple containers to use and you want it. Run docker system df to see where the disk usage is coming from. We can use the system prune child command to remove multiple unused objects in one go. To provide persistent storage for a container using a Docker volume. However, this isn’t the most efficient way. So far, we’ve removed individual Docker objects, such as images and volumes, using the prune child command.
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