![]() ![]() The container shown above is running and it is listening on port 46191. $ podman container lsĬONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMESĭ24063487f9f localhost/web-base httpd -DFOREGROUN. $ podman container run -d -name web-base -P localhost/web-baseĮnter the following command to list your containers. But first, verify that the image works as intended.Įnter the following command to start the container. The remaining stages should reduce the size of the image significantly. The example image shown above is currently occupying 467 MB of storage. Localhost/web-base latest ac8c5ed73bb5 5 minutes ago 467 MB Note in particular the size of your image (467 MB). Use the following command to examine your image’s attributes. $ podman image build -f Containerfile -t localhost/web-base Run the below command to create a new image from the project directory. Set a CMD to indicate what should be run if one creates a container from this image.Set EXPOSE 80 to indicate which port is auto-publishable.COPY files relative to the Containerfile to the container.Create a build container with the base FROM /fedora:33.In the above file there are some comments to indicate what is being done. # Use Fedora 33 as base imageįROM /fedora:33 Place the following text in Containerfile. Your new image will be very simple and it will only include the mandatory steps. You will end up with a series of images, but only one Containerfile. Each of the below stages will add a layer of improvements to help reduce the size of the image. You should now have a project directory with a file system layout similar to what is shown in the below diagram. The file can be named either Dockerfile or Containerfile. $ firefox files/index.htmlįinally, create a container file. Optionally, test the above index.html file in your browser. For this demonstration, you may copy the below HTML into the index.html file. This directory will include your website and container file. The setupįirst, create a project directory. The following steps will also work on more complex images. The container should be relatively small.The container must be based on Fedora Linux.Build a web container meeting the following requirements. $ sudo dnf install -y podman buildah The taskīegin with a basic example. If you don’t have Podman or Buildah installed, run the following command to install them. Podman and Buildah are pre-installed in most Fedora Linux variants. The examples use Podman 3.1.0 and Buildah 1.2.0. The host operating system in the following examples is Fedora Linux 33. This article will provide a few tips for reducing the size of container images. Also, using smaller container images on Fedora CoreOS, IoT and Silverblue improves overall system performance because those operating systems rely heavily on container workflows. They require less bandwidth to download and they save costs when run in cloud environments. If you develop containers, have you ever thought about reducing the image size? Smaller images have several benefits. Container developers often need to (re)build container images frequently. Working with containers is a daily task for many users and developers.
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