12/7/2023 0 Comments Aws lambda slow startupFor example, the AWS-provided base image for the Go runtime /lambda/go:1 is 670 MB, while alpine:latest, a popular starting point for building minimal container images, is only 5.58 MB. The AWS-provided base images are typically larger than other minimal container base images. If you have experience packaging traditional applications for container runtimes, using AWS-provided base images may seem counterintuitive. Fourth, if your application uses one or more large layers across all of your functions, store all of your functions in a single repository. Third, order the operations in your Dockerfile from most stable to most frequently changing. Second, use multi-stage builds to avoid adding unnecessary layers and files to your final image. First, wherever possible, use the AWS-provided base images as a starting point for your container images. There are four main strategies for optimizing your container images. Strategies for optimizing container images The layered structure of container images informs several decisions you make when optimizing your container images. This results in a new container image with eight layers, the first five the same as the original image, and the last three newly built, each with new IDs and parents. ![]() then the layers 1fcc74e8… and acb8da111… are also considered “dirty” and must be recreated from the new parent image. In the following example, if you change the layer cb832ffc. This means that any changes to one layer require all child layers to be recreated. Runtimes generate a filesystem image by destructively overlaying each image layer over its parent. IDĬOPY –from=build-image /go/bin/ /var/task/ Note that the specific layer IDs, layer sizes, number, and composition of layers may change over time. ![]() This includes FROM, RUN, ADD, and COPY statements in your Dockerfile and base image Dockerfiles. A separate layer is created any time files are added to the container image. Your function should have layers similar to the following. The metadata JSON file in each subfolder also contains a mapping from each layer to its parent layer or final container. The list of included layers is ordered according to the build order in your Dockerfile. The manifest.json file contains a single JSON object with the name of the container metadata file, a list of repository tags, and a list of included layers. Each subdirectory represents a single layer, and contains a version file, its own metadata JSON file, and a tar archive of the files that make up the layer. The image directory contains several subdirectories, a container metadata JSON file, a manifest JSON file, and a repositories JSON file. docker save helloworldfunction:go1.x-v1 > oci-image.tar Export this container image to a tar archive and extract the filesystem into a new directory to explore the image format.
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