ЯƎKUPER is a simple Flask app that provides HTTP API with a database, for keeping track of testing lab resource utilization across test atuomation sessions. The utility, `shovel` script is designed to extract the resource information by scraping TSDB (prometheus) metrics and pushing the processed data to `rekuper` database by calling its API endpoints. It can be regularly called by `cron` or spawned as a OSP `cron job` pod.

graph TD;
  Prometheus-->shovel.py-->rekuper_api-->postgres;

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##Setup This is a standard flask app that utilizes Flask-migrate (sqlalchemy + alembic). It requires a database to be set up. To set it up, use the initialization script - scripts/db_init/init-user-db.sh. For a testing setup, you can setup a postgres db container with the schema precreated by running the scripts/db_init_setup_db.sh script.

Add your database connection configuration to the settings.yaml file. You can use the settings.yaml.template for start:

cp settings.yaml{.template,}

apply the migrations so the DB schema is up-to-date:

flask --app rekuper db upgrade

start the app:

flask --app rekuper run

The server uses port 5000 by default. The swagger UI should be accessible as a root page.

Container setup

Build the image

podman build -t localhost/rekuper:0.1 .

Assumuing the database is also going to be run as local container:

# prepare common network
podman network create rekuper

# start db (ephemeral storage) container
podman run \
    --name rekuper_db \
    --network rekuper \
    -e POSTGRES_PASSWORD=changeme \
    -v ./init-user-db.sh:/docker-entrypoint-initdb.d/init-user-db.sh:z \
    postgres:17

Important

At this point, you started an unitialized database. You have to initialize it by running the migration scripts. For this purpose, we'll run a 1-shot rekuper container and override the default command This should be use also on an initialized db every time there is a new migration.

podman run \
    --rm \
    --name rekuper_migrate \
    --network rekuper \
    -p 5000:5000 \
    -e REKUPER_DATABASE__HOST=rekuper_db:5432 \
    -e REKUPER_DATABASE__DB=telemetry \
    -e REKUPER_DATABASE__USERNAME=postgres \
    -e REKUPER_DATABASE__PASSWORD=changeme \
    localhost/rekuper:0.1 \
    flask --app rekuper db upgrade

Run the rekuper container properly this time

podman run \
    --network rekuper \
    -p 5000:5000 \
    -e REKUPER_DATABASE__HOST=rekuper_db:5432 \
    -e REKUPER_DATABASE__DB=telemetry \
    -e REKUPER_DATABASE__USERNAME=postgres \
    -e REKUPER_DATABASE__PASSWORD=changeme \
    localhost/rekuper:0.1