You may wonder: Shouldn't we delete the contents of src? Won't all the source code and build files be included in the final image? No! When building is done, src is unmounted and the directory is empty.Assistant Manager of Sales & Chef at Planet Express What happens here? We build our Maven Spring Boot project, and put the resulting jar file into a app-directory. After that we can simply build our image like in the last example. To run this one, we will have to use ansible-galaxy to install geerlingguy.java first, either with a requirements file or directly ( ansible-galaxy install geerlingguy.java). Src: /src/target/spring-app-0.0.1-SNAPSHOT.jar name: Make app directory that will include our applicationĬreates: /src/target/spring-app-0.0.1-SNAPSHOT.jar Standard settings we do when making container images in general. Simple some image related variables like the base image, as well as resulting image name, command to be run, user etc. If we wanted a Fedora image, we could simple override it from the command line ansible-bender build playbook.yml fedora:35.Īs you can see above, the differences from a plain Ansible playbook to a ansible-bender one used to create images are not that big. The reason is simple: by doing this we keep the setup flexible. You might wonder why we have the "when Debian"-check when it will always be Debian with that base image. How do we build this? Use the command ansible-bender build playbook.yml. Have not tested enough to find the culprit yet, so presenting this as something to be aware of. These might be bugs in ansible-bender or relating to containers. NOTE: As you see in the comment above, I have experienced some minor issues with the become_user and home symbol/tilde. ![]() # had issues with using the home symbol + become_user here. name: Make sure Emacs and git is installed name: Update package archives (Debian-based) If you really love Ansible and its expressiveness, I think you will enjoy using ansible-bender. If you feel like you have what it takes, that could maybe be you? :) Not really a show stopper, as those issues can be fixed by contributors in the future. Most problems solved by using –no-cache if they occur. Some rough edges, especially with the caching mechanism.You can do this during runs by turning off gather_facts and installing it during playbook run. Base images NEEDS to have Python installed.from Ansible Galaxy can make building images way faster (depending on the type of image you make off course). can be tested for correct behaviour using tools like Molecule. Already using Ansible playbooks to build your infrastructure? Then you can consider using those, or parts of those, to write containers.They just get tedious to write if they get too big. Not hating on Dockerfiles, as I think those are fun to write as well. Ansible is beautiful to read, so this is a pretty big benefit in my view. ![]() Can be way more readable than some Dockerfiles you find around the net.There are obviously some pros and cons relating to using such a tool compared to plain Dockerfiles: Might be a bit slower than just using it on a GNU/Linux-based system, but beats not being able to use it at all! To combat this issue I made a Docker image that includes Buildah and all dependencies, that can be used to run Ansible-Bender on other platforms. A very big downside is that it's only supported on GNU/Linux-based systems, which is bad news if you are using Mac OS X (or god forbid if you are one of the Windows users, ugh). Buildah is a container image builder that does not depend on any external programs, and can build containers for any container runtime. This seems like a lot of boiler plate code just to make container images with Ansible, right? From that idea, ansible-bender was born! Ansible-Bender uses Buildah to build your images, and Podman to handle them (some commands like pushing images, build logs, inspecting images etc. An external blog article on that very subject was linked to, and if you read it you may have seen a lot of manual steps using Docker- and Buildah-commands. In the last article, building container images with Ansible was briefly discussed. You probably won't get much use out of ansible-bender without knowing the basics of Ansible first. Need a refresher on Ansible? It was introduced in the last article, so feel free to read it to refresh the concepts. In this article we will look at building images using ansible-bender, which makes for a good way to make images with Ansible with minimal fuzz. ![]() Creating container images with Ansible (using ansible-bender) Published Thu Mar 17 2022ĭid you know that you can use Ansible to make container images? It's actually a very readable way to create images compared to some Dockerfiles you find online (if you don't think so, you have probably never read one that is 100+ lines).
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