AZURE SPRING CLOUD FUNCTION IN DOCKER

[alessio-acitelli]

Please provide us with the following information:

This issue is for a: (mark with an x)

- [ ] bug report -> please search issues before submitting
- [ ] feature request
- [x] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)

Minimal steps to reproduce

This is my Dockerfile:

ARG JAVA_VERSION=11
FROM mcr.microsoft.com/azure-functions/java:4.0-java$JAVA_VERSION-build AS installer-env

COPY . /src/java-function-app
RUN cd /src/java-function-app && \
    mkdir -p /home/site/wwwroot && \
    mvn clean package -Dmaven.test.skip=true && \
    cd ./target/azure-functions/ && \
    cd $(ls -d */|head -n 1) && \
    cp -a . /home/site/wwwroot

FROM mcr.microsoft.com/azure-functions/java:4.0-java$JAVA_VERSION

ENV AzureWebJobsScriptRoot=/home/site/wwwroot \
    AzureFunctionsJobHost__Logging__Console__IsEnabled=true

EXPOSE 80
COPY --from=installer-env ["/home/site/wwwroot", "/home/site/wwwroot"]

Any log messages given by the failure

This is the error that i received during Build Docker Image step:

Error:  Failed to execute goal com.microsoft.azure:azure-functions-maven-plugin:1.21.0:package (package-functions) on project afm-utils: Local Azure Functions Core Tools does not exist or is too old to support function extension installation, skip package phase. To install or update it, see: https://aka.ms/azfunc-install -> [Help 1]
Error:  
Error:  To see the full stack trace of the errors, re-run Maven with the -e switch.
Error:  Re-run Maven using the -X switch to enable full debug logging.
Error:  
Error:  For more information about the errors and possible solutions, please read the following articles:
Error:  [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
The command '/bin/sh -c cd /src/java-function-app &&     mkdir -p /home/site/wwwroot &&     mvn clean package -Dmaven.test.skip=true &&     cd ./target/azure-functions/ &&     cd $(ls -d */|head -n 1) &&     cp -a . /home/site/wwwroot' returned a non-zero code: 1
Error: Process completed with exit code [1](https://github.com/pagopa/pagopa-afm-utils/actions/runs/3758664107/jobs/6387273175#step:5:1).

Expected/desired behavior

Deploy the application in the docker container

OS and Version?

Linux (ubuntu-18.04)

Versions

18.04

Mention any other details that might be useful

This is my host.json file

{
  "version": "2.0",
  "extensionBundle": {
    "id": "Microsoft.Azure.Functions.ExtensionBundle",
    "version": "[3.*, 4.0.0)"
  },
  "logging": {
    "fileLoggingMode": "always",
    "logLevel": {
      "default": "Information",
      "Host.Results": "Error",
      "Function": "Information",
      "Host.Aggregator": "Trace"
    },
    "applicationInsights": {
      "samplingSettings": {
        "isEnabled": false
    }
  }
}
}

any suggestion?

---

Thanks! We'll be in touch soon.

[jdubois]

We don't use Docker at all in this sample - I just tried building this locally and it works, so I'm guessing your base image isn't good.
Have you tried with https://github.com/Azure/azure-functions-docker ? The error message does say Failed to execute goal com.microsoft.azure:azure-functions-maven-plugin:1.21.0:package (package-functions) on project afm-utils: Local Azure Functions Core Tools does not exist or is too old to support function extension installation, so maybe the tooling isn't installed in this image? Maybe there are several images?

[alessio-acitelli]

Locally everything works fine for me too.
If you try to dockerize your sample project does everything work for you? If so, please share the dockerfile so I can check where I'm going wrong.
Thanks 🙏

[jdubois]

What's the point of Dockerizing it? If it runs locally and on Azure Functions. Is this for testing?

Then again, I believe it comes from your base image. There might be different ones, depending on the use cases, did you have a look?

[aomegax]

Hi @jdubois,
yes, we think the problem is the base image, but we have found no example in this way.
Have you never try to dockerize a spring boot application with a function?

Thank you for the support.

[jdubois]

No I’ve never needed that - for development and tests I’m with my local environment, which is easier/faster.
It would probably be useful for running inside a CI/CD pipeline, so I’ll have a look, but I can’t commit on a date.
Have you looked at the base image? You can also fill a bug on that repo, at least for documenting which image to use.

[jdubois]

I just updated the repo to use Spring Boot 3, and the latest version of everything (not sure of the impact, but this can't be bad).

The following Dockerfile looks ok to me:

FROM mcr.microsoft.com/azure-functions/java:4-java17-build AS installer-env

COPY . /build/java-function-app
RUN cd /build/java-function-app && \
    mkdir -p /home/site/wwwroot && \
    mvn clean package -Dmaven.test.skip=true && \
    cd ./target/azure-functions/ && \
    cd $(ls -d */|head -n 1) && \
    cp -a . /home/site/wwwroot

FROM mcr.microsoft.com/azure-functions/java:4-java17

ENV AzureWebJobsScriptRoot=/home/site/wwwroot \
    AzureFunctionsJobHost__Logging__Console__IsEnabled=true

COPY --from=installer-env ["/home/site/wwwroot", "/home/site/wwwroot"]

EXPOSE 7071

However I can't test it as I'm using a Mac M1, and there's a bug with that architecture - I'm guessing it's Azure/azure-functions-core-tools#2901

[alessio-acitelli]

Hi @jdubois, first of all happy new year :)
About the dockerization of our azure cloud function i keep having problems.
I also tried with your docker file which was pretty much the same as ours (see ### Minimal steps to reproduce) but i get the same error.

Our project is based on spring-boot 2.7.7 not 3 but why do you think this migration can be decisive?
This migration requires considerable work on our project and the Microsoft documentation makes no mention of spring and/or java versions.

We can also decide to migrate to spring 3 but we would like to be sure that it is a necessary and decisive step.

The ideal would be to have an example of a tested and working dockerizable azure cloud function project in order to be sure of the steps to follow.

Any support is welcome, thanks a lot 🙏

[jdubois]

Hey, happy new year to you too!

• I messed up the port in the Dockerfile, it should have been 80, not 8080. I fixed it, and as I could test today (using GitHub Codespaces), I pushed the Dockerfile here https://github.com/Azure-Samples/hello-spring-function-azure/blob/master/Dockerfile so you can use it directly. This works on Linux, and probably not on a Mac M1.
• I downgraded to Spring Boot 2.7.7 and it works the same as Spring Boot 3.0.1. I would still recommend upgrading, the OSS version of Spring Boot 2.x.x will be EOL in 10 months, so it's time to plan. As far as I've tested it, the migration was easy.

-> can you check that this Dockerfile works with you? If that's good then we'll know the issue will be somewhere else