test_kubernetes_pyflink_application.sh

#!/usr/bin/env bash
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source "$(dirname "$0")"/common_kubernetes.sh

CURRENT_DIR=`cd "$(dirname "$0")" && pwd -P`
CLUSTER_ROLE_BINDING="flink-role-binding-default"
CLUSTER_ID="flink-native-k8s-pyflink-application-1"
PURE_FLINK_IMAGE_NAME="test_kubernetes_application-1"
PYFLINK_IMAGE_NAME="test_kubernetes_pyflink_application"
LOCAL_LOGS_PATH="${TEST_DATA_DIR}/log"
IMAGE_BUILD_RETRIES=3
IMAGE_BUILD_BACKOFF=2

function internal_cleanup {
    kubectl delete deployment ${CLUSTER_ID}
    kubectl delete clusterrolebinding ${CLUSTER_ROLE_BINDING}
}

start_kubernetes

if ! retry_times $IMAGE_BUILD_RETRIES $IMAGE_BUILD_BACKOFF "build_image ${PURE_FLINK_IMAGE_NAME}"; then
	echo "ERROR: Could not build image. Aborting..."
	exit 1
fi

FLINK_PYTHON_DIR=`cd "${CURRENT_DIR}/../../flink-python" && pwd -P`

CONDA_HOME="${FLINK_PYTHON_DIR}/dev/.conda"

"${FLINK_PYTHON_DIR}/dev/lint-python.sh" -s miniconda

PYTHON_EXEC="${CONDA_HOME}/bin/python"

source "${CONDA_HOME}/bin/activate"

cd "${FLINK_PYTHON_DIR}"

if [[ -d "dist" ]]; then rm -Rf dist; fi

pushd apache-flink-libraries

python setup.py sdist

popd

python setup.py sdist

cd dev

rm -rf .conda/pkgs

deactivate

PYFLINK_PACKAGE_FILE=$(basename "${FLINK_PYTHON_DIR}"/dist/apache-flink-*.tar.gz)
PYFLINK_LIBRARIES_PACKAGE_FILE=$(basename "${FLINK_PYTHON_DIR}"/apache-flink-libraries/dist/apache-flink-libraries-*.tar.gz)
echo ${PYFLINK_PACKAGE_FILE}
echo ${PYFLINK_LIBRARIES_PACKAGE_FILE}
# Create a new docker image that has python and PyFlink installed.
PYFLINK_DOCKER_DIR="$TEST_DATA_DIR/pyflink_docker"
mkdir -p "$PYFLINK_DOCKER_DIR"
cp "${FLINK_PYTHON_DIR}/dist/${PYFLINK_PACKAGE_FILE}" $PYFLINK_DOCKER_DIR/
cp "${FLINK_PYTHON_DIR}/apache-flink-libraries/dist/${PYFLINK_LIBRARIES_PACKAGE_FILE}" $PYFLINK_DOCKER_DIR/
cp "${FLINK_PYTHON_DIR}/dev/lint-python.sh" $PYFLINK_DOCKER_DIR/
cp "${FLINK_PYTHON_DIR}/dev/dev-requirements.txt" $PYFLINK_DOCKER_DIR/
if [[ -d "dist" ]]; then rm -Rf dist; fi
cd ${PYFLINK_DOCKER_DIR}
echo "FROM ${PURE_FLINK_IMAGE_NAME}" >> Dockerfile
echo "RUN apt-get update && apt-get install build-essential -y" >> Dockerfile
echo "COPY lint-python.sh /tmp/lint-python.sh" >> Dockerfile
echo "COPY dev-requirements.txt /tmp/dev-requirements.txt" >> Dockerfile
echo "RUN bash /tmp/lint-python.sh -s basic" >> Dockerfile
echo "COPY ${PYFLINK_PACKAGE_FILE} ${PYFLINK_PACKAGE_FILE}" >> Dockerfile
echo "COPY ${PYFLINK_LIBRARIES_PACKAGE_FILE} ${PYFLINK_LIBRARIES_PACKAGE_FILE}" >> Dockerfile
echo "RUN /tmp/.conda/bin/python -m pip install -r /tmp/dev-requirements.txt"  >> Dockerfile
echo "RUN /tmp/.conda/bin/python -m pip install ${PYFLINK_LIBRARIES_PACKAGE_FILE}" >> Dockerfile
echo "RUN /tmp/.conda/bin/python -m pip install ${PYFLINK_PACKAGE_FILE}" >> Dockerfile
echo "RUN rm ${PYFLINK_LIBRARIES_PACKAGE_FILE}" >> Dockerfile
echo "RUN rm ${PYFLINK_PACKAGE_FILE}" >> Dockerfile
echo "ENV PATH /tmp/.conda/bin:\$PATH" >> Dockerfile
docker build --no-cache --network="host" -t ${PYFLINK_IMAGE_NAME} .

kubectl create clusterrolebinding ${CLUSTER_ROLE_BINDING} --clusterrole=edit --serviceaccount=default:default --namespace=default

mkdir -p "$LOCAL_LOGS_PATH"

# Set the memory and cpu smaller than default, so that the jobmanager and taskmanager pods could be allocated in minikube.
"$FLINK_DIR"/bin/flink run -t kubernetes-application \
    -Dkubernetes.cluster-id=${CLUSTER_ID} \
    -Dkubernetes.container.image.ref=${PYFLINK_IMAGE_NAME} \
    -Djobmanager.memory.process.size=1088m \
    -Dkubernetes.jobmanager.cpu=0.5 \
    -Dkubernetes.taskmanager.cpu=0.5 \
    -Dkubernetes.rest-service.exposed.type=NodePort \
    -pym word_count -pyfs /opt/flink/examples/python/table

kubectl wait --for=condition=Available --timeout=60s deploy/${CLUSTER_ID} || exit 1
jm_pod_name=$(kubectl get pods --selector="app=${CLUSTER_ID},component=jobmanager" -o jsonpath='{..metadata.name}')
wait_rest_endpoint_up_k8s $jm_pod_name

# The Flink cluster will be destroyed immediately once the job finished or failed. So we check jobmanager logs
# instead of checking the result
kubectl logs -f $jm_pod_name >$LOCAL_LOGS_PATH/jobmanager.log
grep -E "Job [A-Za-z0-9]+ reached terminal state FINISHED" $LOCAL_LOGS_PATH/jobmanager.log

# clean up python env
"${FLINK_PYTHON_DIR}/dev/lint-python.sh" -r

# clean up apache-flink-libraries
rm -rf "${FLINK_PYTHON_DIR}/apache-flink-libraries/dist/${PYFLINK_LIBRARIES_PACKAGE_FILE}"