Host Metering

Host metering client.

Usage

$ host-metering daemon

Or if run from RPMs as a service:

# yum install host-metering
# systemctl enable host-metering
# systemctl start host-metering

See output/log:

# journalctl -feu host-metering

RPM repository

RPM builds of main branch are available at COPR: https://copr.fedorainfracloud.org/coprs/pvoborni/host-metering/

Contribute

See CONTRIBUTING.md.

Build

$ go build

rpms via mock:

$ make mock   # EPEL 7
$ make mock-8 # CentOS Stream 8
$ make mock-9 # CentOS Stream 9

rpms directly via rpmbuild

$ make rpm

Testing

Unit tests

To run go unit test:

$ make test

Local run / development

$ make test-daemon

It will run host-metering with:

mocked subscription-manager
test configuration file that is lowering intervals and using the following:
test certificate
custom path for metrics WAL
Prometheus server started in a podman container

Note: You may specifiy the UBI version you wish to test with the optional UBI_VERSION argument. If not specified, it will default to 7:

$ make test-daemon UBI_VERSION=<version_number>

Query Prometheus, e.g., via command:

$ curl 'http://localhost:9090/api/v1/query?query=system_cpu_logical_count' | jq

Or visit the Prometheus Web UI at http://localhost:9090/graph?g0.expr=system_cpu_logical_count&g0.tab=0&g0.range_input=1m

Clean-up

$ make clean      # clean build&test files
$ make clean-pod  # destroy podman pod

Running in a container

This project has configuration for running inside VSCode container.

Prerequisites:

It requires podman and podman-compose to be installed on the host machine. To install podman-compose, please run

sudo dnf install podman-compose

Make sure to add the following settings to user's settings.json (ctrl+shift+P -> Preferences: Open user settings (JSON)). This will set up the dev containers plugin to work with podman and podman-compose

    "dev.containers.dockerComposePath": "podman-compose",
    "dev.containers.dockerPath": "podman"

Execute .devcontainer/commands/prepare_containers.sh. It will create docker-compose.local.yml file that will be used to run the container properly.

Running make commands in a container

There is an option to run make commands inside the docker-compose generated environment. Just prefix a make command you would like to run with podman-. e.g. to run make test in a container, use make podman-test.

Mocking subscription-manager commands

mocked_run.sh is a shortcut to running go run main.go with mocked context.

Preparing the mocks

Inside the mocks folder run ./mock_from_host.sh to generate outputs that will be used as mocks. You have to have a system with subscription-manager installed and registered correctly to generate the mocks.

rhobs/host-metering