charybdis

Provides fixed endpoints of M3 annotation data used in publication. This allows reliable URL that can be published along with papers.

Build and run

With JDK21+

mvn package
java -jar target/charybdis.jar

Exercise the application

curl -X GET http://localhost:8080/n0

Try health and metrics

curl -s -X GET http://localhost:8080/health
{"outcome":"UP",...
. . .

# Prometheus Format
curl -s -X GET http://localhost:8080/metrics
# TYPE base:gc_g1_young_generation_count gauge
. . .

# JSON Format
curl -H 'Accept: application/json' -X GET http://localhost:8080/metrics
{"base":...
. . .

Build the Docker Image

# We need our github access key to get VARS dependencies
cp ~/.m2/settings.xml . 
docker build -t mbari/charybdis .

Start the application with Docker

docker run --rm -p 8080:8080 charybdis:latest

Exercise the application as described above

Deploy the application to Kubernetes

kubectl cluster-info                # Verify which cluster
kubectl get pods                    # Verify connectivity to cluster
kubectl create -f app.yaml   # Deply application
kubectl get service charybdis  # Get service info

Native image with GraalVM

GraalVM allows you to compile your programs ahead-of-time into a native executable. See https://www.graalvm.org/docs/reference-manual/aot-compilation/ for more information.

You can build a native executable in 2 different ways:

• With a local installation of GraalVM
• Using Docker

Local build

Download Graal VM at https://github.com/oracle/graal/releases, the versions currently supported for Helidon is 19.1.1 and 19.2.0.

# Setup the environment
export GRAALVM_HOME=/path
# build the native executable
mvn package -Pnative-image

You can also put the Graal VM bin directory in your PATH, or pass -DgraalVMHome=/path to the Maven command.

See https://github.com/oracle/helidon-build-tools/tree/master/helidon-maven-plugin for more information.

Start the application:

./target/charybdis

Multi-stage Docker build

Build the "native" Docker Image

docker build -t charybdis-native -f Dockerfile.native .

Start the application:

docker run --rm -p 8080:8080 charybdis-native:latest