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Mitz
Mitz

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Micronaut PetClinic with GraalVM > 19

#micronaut #graalvm #java

Now you can run Micronaut PetClinic with the (kinda) latest GraalVM Native Image. I will explain the meaning later.

Build & Run 

$ git clone https://github.com/bufferings/micronaut-petclinic.git $ cd micronaut-petclinic # Build Native Image. Please wait for 10-15 minutes. $ ./mvnw package && docker build -t micronaut-petclinic . # Start Database $ docker-compose up -d db # Run separately to see the log easily $ docker-compose up app
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Start up time

It starts in a few hundreds of millis.

Docker Information

The image size is 130MB.

❯ docker images micronaut-petclinic REPOSITORY TAG IMAGE ID CREATED SIZE micronaut-petclinic latest 40834e227e19 About an hour ago 130MB
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and the memory usage is 125MB after using for a while

❯ docker ps -f name=micronaut-petclinic_app* -q | xargs docker stats --no-stream CONTAINER ID NAME CPU % MEM USAGE / LIMIT MEM % NET I/O BLOCK I/O PIDS 5c4c627ee81d micronaut-petclinic_app_1_1350df269f2b 0.07% 124.3MiB / 15.4GiB 0.79% 158kB / 121kB 0B / 0B 11
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Background

I created Micronaut PetClinic last month and it worked as Native Image with GraalVM 1.0 RC16 to start surprisingly fast speed in a few hundreds of millis.

bufferings

Micronaut PetClinic

Mitz ・ May 6 '19 ・ 1 min read

#micronautfw #graalvm #java

A few days later, GraalVM released a production version 19.0.0.
https://medium.com/graalvm/announcing-graalvm-19-4590cf354df8

But unfortunately, my PetClinic doesn't work with GraalVM 19 Native Image. (´・ω・｀)

The cause is this issue:
https://github.com/oracle/graal/issues/1295

and we need this commit:
https://github.com/oracle/graal/commit/c6237d219a91c82b1954dfbfa0898ed917db09eb

The commit hasn't been included in the latest version 19.0.2 released yesterday.

Docker Image with the latest GraalVM

Then I found it works when I build GraalVM from its master branch. So I created a Docker image with the master branch:
https://hub.docker.com/r/bufferings/build-graalvm-docker

I would like to use it for a while until the commit is included in the GraalVM official release.

With Micronaut, it's so easy to create an application for Native Image, but I would like to talk about it another time (๑•̀ㅂ•́)و✧

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