mirror of
https://github.com/coder/coder.git
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Muhammad Atif Ali
67 lines
2.7 KiB
Markdown
67 lines
2.7 KiB
Markdown
# Dev container security and caching
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Ensure Envbuilder can only pull pre-approved images and artifacts by configuring
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it with your existing HTTP proxies, firewalls, and artifact managers.
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## Configure registry authentication
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You may need to authenticate to your container registry, such as Artifactory, or
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Git provider such as GitLab, to use Envbuilder. See the
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[Envbuilder documentation](https://github.com/coder/envbuilder/blob/main/docs/container-registry-auth.md)
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for more information.
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## Layer and image caching
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To improve build times, dev containers can be cached. There are two main forms
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of caching:
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- **Layer caching**
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- Caches individual layers and pushes them to a remote registry. When building
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the image, Envbuilder will check the remote registry for pre-existing layers
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These will be fetched and extracted to disk instead of building the layers
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from scratch.
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- **Image caching**
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- Caches the entire image, skipping the build process completely (except for
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post-build
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[lifecycle scripts](./add-devcontainer.md#dev-container-lifecycle-scripts)).
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Note that caching requires push access to a registry, and may require approval
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from relevant infrastructure team(s).
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Refer to the
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[Envbuilder documentation](https://github.com/coder/envbuilder/blob/main/docs/caching.md)
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for more information about Envbuilder and caching.
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Visit the
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[speed up templates](../../../../tutorials/best-practices/speed-up-templates.md)
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best practice documentation for more ways that you can speed up build times.
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### Image caching
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To support resuming from a cached image, use the
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[Envbuilder Terraform Provider](https://github.com/coder/terraform-provider-envbuilder)
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in your template. The provider will:
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1. Clone the remote Git repository,
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1. Perform a "dry-run" build of the dev container in the same manner as
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Envbuilder would,
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1. Check for the presence of a previously built image in the provided cache
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repository,
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1. Output the image remote reference in SHA256 form, if it finds one.
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The example templates listed above will use the provider if a remote cache
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repository is provided.
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If you are building your own Dev container template, you can consult the
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[provider documentation](https://registry.terraform.io/providers/coder/envbuilder/latest/docs/resources/cached_image).
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You may also wish to consult a
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[documented example usage of the `envbuilder_cached_image` resource](https://github.com/coder/terraform-provider-envbuilder/blob/main/examples/resources/envbuilder_cached_image/envbuilder_cached_image_resource.tf).
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## Next steps
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- [Dev container releases and known issues](./devcontainer-releases-known-issues.md)
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- [Dotfiles](../../../../user-guides/workspace-dotfiles.md)
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