doc: add images.json to build image #94
Conversation
Refs: paketo-community#88 The plan is to use it in the extensions to find the run images instead of data in the extension.toml file Signed-off-by: Michael Dawson <mdawson@devrus.com>
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@mhdawson can you remind me what this file is for? |
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@sophiewigmore we currently use this file when we build the stack in order to drive the generation of the build and run images. For example in the case of Node.js it currently says that we build/publish run images for Node.js 16,18, and 20. It includes the info we need for building and publishing the containers. We want to start using this in the node and java extensions as well. It already has the info needed to publish the container so we can use that same information to get the info for the run image that the extension will specify that the application should be switched onto by the extension. Currently we've baked that information either into the extention.toml (in the Node.js case) by leveraging the dependency section or into the extension itself (I think in the java case). Talking with @BarDweller it seemed much cleaner to pull this from the images.json file so that the extension does not need to be updated when new versions of Node.js or Java are supported by the stack. It will also make supporting multiple versions of ubi (for example ubi9) easier as the same extension would work with both stacks, the build image for ubi 9 would just contain a different images.json that the build image for ubi8. Tying the available images to what is used to build the run images makes sense to us because they need to be kept in sync as the extension must swtich to one of the run images that has been built. |
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@sophiewigmore ping? |
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@mhdawson sorry I missed your comment a couple. weeks ago 🙈 thanks for the details |
Refs: #88
The plan is to use it in the extensions to find the run images instead of data in the extension.toml file
Summary
Include the images.json file in the base image in the directory /etc/buildpacks
Use Cases
Checklist