Prometheus Exporter for Google Cloud Platform (GCP)

I want to be able to monitor my resource consumption across multiple cloud platforms (GCP, Digital Ocean and Linode). I was inspired by @metalmatze's DigitalOcean Exporter and, with this exporter, have the three that I need:

• Google Cloud Platform Exporter
• Digital Ocean Exporter
• Linode Exporter

Result:

And:

Installation

The application uses Google's Application Default Credentials (ADCs) to simplify authentication by finding credentials automatically.

On a machine running gcloud that's authenticated with your user (e.g. Gmail) account, you can run gcloud auth application-default login to establish your user account as ADCs. This ensures that the Exporter is able to operate as if it were you(r user account), enumerate GCP projects that you(r user account) has access to and resources within those projects.

If you run the Exporter remotely, you will need to create a service account for it to use. The Exporter will only be able to enumerate projects and project resources that this service account is able to access.

In the following examples, the Exporter's container is configured to use the ADCS stored in ${HOME}/.config/gcloud/appl...

Go

In this example, ADCs will be automatically detected without further configuration.

go get github.com/DazWilkin/gcp-exporter
go run github.com/DazWilkin/gcp-exporter

Standalone

PORT=9402
CREDENTIALS="${HOME}/.config/gcloud/application_default_credentials.json"
REPO="ghcr.io/dazwilkin/gcp-exporter"
docker run \
--interactive --tty \
--publish=${PORT}:${PORT} \
--volume=${CREDENTIALS}:/secrets/client_secrets.json \
--env=GOOGLE_APPLICATION_CREDENTIALS=/secrets/client_secrets.json \
ghcr.io/dazwilkin/gcp-exporter:5c8ff3c5cf405e0e8ae659b1ad7eae306c4687ec

Sigstore

gcp-exporter container images are being signed by Sigstore and may be verified:

cosign verify \
--key=./cosign.pub \
ghcr.io/dazwilkin/gcp-exporter:5c8ff3c5cf405e0e8ae659b1ad7eae306c4687ec

NOTE cosign.pub may be downloaded here

To install cosign, e.g.:

go install github.com/sigstore/cosign/cmd/cosign@latest

Docker Compose

docker-compose up

NB docker-compose.yml configuration for gcp-exporter services is:

gcp-exporter:
  image: ghcr.io/dazwilkin/gcp-exporter:5c8ff3c5cf405e0e8ae659b1ad7eae306c4687ec
  container_name: gcp-exporter
  environment:
  - GOOGLE_APPLICATION_CREDENTIALS=/secrets/client_secrets.json
  volumes:
  - /home/dazwilkin/.config/gcloud/application_default_credentials.json:/secrets/client_secrets.json
  expose:
  - "9402" # GCP Exporter port registered on Prometheus Wiki
  ports:
  - 9402:9402

The Docker Compose configuration includes:

• GCP Exporter
• Prometheus
• AlertManager
• cAdvisor

NB You will need to create an alertmanager.yml configuration file. This example shows you how to configure AlertManager to send alerts to Gmail

Kubernetes

Assuming MicroK8s and Prometheus Operator

NAMESPACE="gcp-exporter"

kubectl create namespace ${NAMESPACE}

kubectl create secret generic gcp-exporter \
--from-file=client_secrets.json=/home/dazwilkin/.config/gcloud/application_default_credentials.json \
--namespace=${NAMESPACE}

kubectl apply \
--filename=./kubernetes.yaml \
--namespace=${NAMESPACE}

# NB This must be installed to 'monitoring' namespace
kubectl apply --filename=./kubernetes.rule.yaml  --namespace=monitoring

Raspberry Pi

Learning about multi-arch builds to run on Raspberry Pi 4.

Unsure how to use docker manifest with GitHub Actions as this model has been suplanted by docker buildx (that I don't want to use).

Refactored Dockerfile to take a build argument GOLANG_OPTIONS (default=CGO_ENABLED=0 GOOS=linux GOARCH=amd64)

if [ "$(getconf LONG_BIT)" -eq 64 ]
then
  # 64-bit Raspian
  ARCH="GOARCH=arm64"
  TAG="arm64"
else
  # 32-bit Raspian
  ARCH="GOARCH=arm GOARM=7"
  TAG="arm32v7"
fi

docker build \
--build-arg=GOLANG_OPTIONS="CGO_ENABLED=0 GOOS=linux ${ARCH}" \
--build-arg=COMMIT=$(git rev-parse HEAD) \
--build-arg=VERSION=$(uname --kernel-release) \
--tag=ghcr.io/dazwilkin/gcp-exporter:${TAG} \
--file=./Dockerfile \
.

NOTE See environment variables

Podman

NOTE You will need to replace the service names (alertmanager, gcp-exporter, gcp-status, cadvisor and node-exporter) in prometheus.yml with localhost

NOTE minimal set of containers pending cAdvisor support for Podman. See cAdvisor Issue #2424 and Pull #3021

sed \
--in-place \
--expression="s/\(alertmanager\|gcp-exporter\|gcp-status\|cadvisor\|node-exporter\):/localhost:/g" \
prometheus.yml

POD="exporter"

# 8080: cAdvisor (Unavailabe)
# 9090: Prometheus
# 9093: AlertManager
# 9402: GCP Exporter
# 9100: Node Exporter
podman pod create \
--name=${POD} \
--publish=9090:9090 \
--publish=9093:9093 \
--publish=9402:9402 \
--publish=9100:9100

podman run \
--detach --tty --rm \
--pod=${POD} \
--name=prometheus \
--volume=${PWD}/prometheus.yml:/etc/prometheus/prometheus.yml \
--volume=${PWD}/rules.yml:/etc/alertmanager/rules.yml \
docker.io/prom/prometheus:v2.37.0 \
  --config.file=/etc/prometheus/prometheus.yml \
  --web.enable-lifecycle

podman run \
--detach --tty --rm \
--pod=${POD} \
--name=alertmanager \
--volume=${PWD}/alertmanager.yml:/etc/alertmanager/alertmanager/rules.yml \
docker.io/prom/alertmanager:v0.24.0

podman run \
--detach --tty --rm \
--pod=${POD} \
--name=gcp-exporter \
--env=GOOGLE_APPLICATION_CREDENTIALS=/secrets/key.json \
--volume=/home/userid/.config/gcloud/application_default_credentials.json:/secrets/key.json \
ghcr.io/dazwilkin/gcp-exporter:5c8ff3c5cf405e0e8ae659b1ad7eae306c4687ec

podman run \
--detach --tty --rm \
--name=node-exporter \
--pod=${POD} \
--volume=/:/host:ro,rslave \
docker.io/prom/node-exporter:v1.1.2 \
  --path.rootfs=/host

Develop

git clone git@github.com:DazWilkin/gcp-exporter.git && cd gcp-exporter

Please file issues

Metrics

Name	Type	Description
gcp_exporter_buildinfo	Counter	A metric with a constant '1' value labeled by OS version, Go version, and the Git commit of the exporter
gcp_exporter_startime	Gauge	Exporter start time in Unix epoch seconds
gcp_artifact_registry_registries	Gauge	Number of Artifact Registry registries
gcp_artifact_registry_locations	Gauge	Number of Artifact Registry locations
gcp_artifact_registry_formats	Gauge	Number of Artifact Registry formats
gcp_cloud_endpoints_services	Gauge	Number of Cloud Endpoints services
gcp_cloud_functions_functions	Gauge	Number of Cloud Functions functions
gcp_cloud_functions_locations	Gauge	Number of Cloud Functions locations
gcp_cloud_functions_runtimes	Gauge	Number of Cloud Functions runtimes
gcp_cloud_logging_logs	Gauge	Number of Cloud Logging Logs
gcp_cloud_monitoring_alert_policies	Gauge	Number of Cloud Monitoring Alert Policies
gcp_cloud_monitoring_uptime_checks	Gauge	Number of Cloud Monitoring Uptime Checks
gcp_cloud_run_jobs	Gauge	Number of Cloud Run jobs
gcp_cloud_run_services	Gauge	Number of Cloud Run services
gcp_cloud_scheduler_jobs	Gauge	Number of Cloud Scheduler jobs
gcp_compute_engine_instances	Gauge	Number of instances
gcp_compute_engine_forwardingrules	Gauge	Number of forwardingrules
gcp_kubernetes_engine_cluster_up	Gauge	1 if the cluster is running, 0 otherwise
gcp_kubernetes_engine_cluster_nodes	Gauge	Number of nodes currently in the cluster
gcp_storage_buckets	Gauge	Number of buckets

Prometheus API

curl \
--silent \
http://localhost:9090/api/v1/label/__name__/values \
| jq -r .data[] | awk '/^gcp/ {print}'

Yields:

gcp_artifact_registry_formats
gcp_artifact_registry_locations
gcp_artifact_registry_registries
gcp_cloud_endpoints_services
gcp_cloud_functions_functions
gcp_cloud_functions_locations
gcp_cloud_functions_runtimes
gcp_cloud_logging_logs
gcp_cloud_run_services
gcp_compute_engine_forwardingrules
gcp_compute_engine_instances
gcp_exporter_build_info
gcp_exporter_start_time
gcp_kubernetes_engine_cluster_nodes
gcp_kubernetes_engine_cluster_up
gcp_projects_count
gcp_storage_buckets

Port

Registered 9402 with Prometheus Exporters' default port allocations

References

Using Google's (now legacy) API Client Libraries. The current Cloud Client Libraries do not provide coverage for all the relevant resources.

• Google Compute Engine API
• Google Resource Manager API && GoDoc
• Google Kubernetes Engine (Container) API && GoDoc

Similar Exporters

• Prometheus Exporter for Azure
• Prometheus Exporter for Fly.io
• Prometheus Exporter for Koyeb
• Prometheus Exporter for Linode
• Prometheus Exporter for Vultr

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