schnatterer/micronaut-getting-started repository overview

⁠micronaut-getting-started

Result of the Getting Started with Micronaut and Graal⁠ - slightly extended so

• a GraalVM native image can be built using a "self-contained" Dockerfile that does not require to build or install anything locally and
• to be compiled statically so a minimal (scratch) docker base image can be used.

To build just run

docker build -t micronaut/getting-started .

Then start the container with

docker run -i --rm -p 8080:8080 micronaut/getting-started

⁠Base images compared

As of May 2019, the Micronaut getting started uses the frolvlad/alpine-glibc base image for the final image. This repo provides a couple of other base images that compare as follows

Base Image	Size	Shell	Package Manager	libc	Basic Linux Folders	Static Binary	Dockerfile
alpine-glibc		☒	☒	☒	☒	☐	📄⁠
distroless-static		☐	☐	☐	☒	☒	📄⁠
scratch		☐	☐	☐	☐	☒	📄⁠

Note that

• size is the compressed size within the DockerHub registry,
• if a shell is needed for debugging, you could just copy a statically compiled shell into the container, (except, of course, you're using a read-only filesystem):

docker run --rm --name micronaut-getting-started schnatterer/micronaut-getting-started

docker create --name busybox busybox
docker cp busybox:/bin/busybox busybox
docker cp busybox micronaut-getting-started:/busybox
docker exec -it micronaut-getting-started /busybox sh