HelloWorld Apama Docker Application

Question

I am trying to build a simple HelloWorld docker image using apama-builder. However I am getting the following error:

INFO: copying the project file from /app/HelloWorld to output directory /app/deployed
ERROR: Failed to create correlator initialization list: /app/deployed
The command '/bin/sh -c engine_deploy --outputDeployDir /app/deployed /app/HelloWorld' returned a non-zero code: 100

My Docker File looks like as below:

# Use the build environment
FROM store/softwareag/apama-builder:10.3 as builder

# Copy project assets into build environment
COPY --chown=1724:1724 . /app/HelloWorld

# Deploy the apama project
RUN engine_deploy --outputDeployDir /app/deployed /app/HelloWorld

# Add any additional build steps you may have, such as building plugins, here
# RUN ...

# Final image is based on the runtime base image
FROM store/softwareag/apama-correlator:10.3

# Copy deployed project from the build environment
COPY --chown=1724:1724 --from=builder /app/deployed /app/deployed

# Add copies for any additional build artifacts created in the build environment
# COPY --from=builder ...

WORKDIR /app

# Run the deployed project
CMD ["correlator", "--config", "Project_deployed", "--logfile", "/dev/stdout"]

Note I am using CentOS, and my HelloWorld application is located at /app/HelloWorld and I want the output to be at /app/deployed.

Answer 1

There are a couple of issues, but it stems from the fact that the deploy process doesn't run as root and so can't create the output directory. It fooled me initially as well :)

Firstly the

# Copy project assets into build environment
COPY --chown=1724:1724 . /app/HelloWorld

works but the engine_deploy won't because it can't access /app/deployed

so if you change the engine_deploy line to

RUN engine_deploy --outputDeployDir ${APAMA_WORK}/deployed /app/HelloWorld

It will create the runnable application deployment in the "work" directory usually /apama_work

Now because it isn't where you placed it you'll need to change the copy from the builder

# Copy deployed project from the build environment
COPY --chown=1724:1724 --from=builder ${APAMA_WORK}/deployed ${APAMA_WORK}/deployed

and lastly the CMD line needs to change

# Run the deployed project
CMD ["correlator", "--config", "deployed", "--logfile", "/dev/stdout"]

to match the output directory