Consuming Metrics from Prometheus
How to aggregate data from Prometheus node exporters and access the Prometheus web console
Starting with Orka v2.2.0 it is now possible to collect metrics from your Orka cluster, including host metrics for each node in the cluster as well as metrics for the Orka API server.
Consuming Metrics from the Orka Cluster Prometheus Instance
By default the Prometheus instance running in-cluster is exposed on port
9090 of the Orka load-balancer IP address. Typically, this will be either
http://10.221.188.100:9090. Consult your IP plan if you aren't sure.
Make sure that TCP traffic is permitted to port
9090for the Orka load-balancer IP address through your firewall or ACL!
If you are connected to the Orka cluster from your local machine via a VPN connection, you can run PromQL queries in your browser by navigating to
http://<orka-load-balancer>:9090/graph. For example, to get the number of Orka VM deployments over the last 2 hours, try the following query:
Integrating Orka Metrics with an Existing Prometheus Instance
If your organization is already using Prometheus and you wish to collect additional data from your Orka cluster, follow the instructions in this section.
Orka Server and Operator Metrics
Metrics for the Orka server and operator are available via the
/metrics endpoint of the Orka API address. For most environments this is typically
10.221.188.100, but check your IP plan if you aren't sure.
8080 in the endpoint for the operator metrics.
To verify you are able to access the Orka server and operator metrics, try cURLing the endpoints:
curl -I 10.221.188.20/metrics curl -I 10.221.188.20:8080/metrics
You should receive a response of
200 OK if all is well.
To view descriptions and additional information on the available Orka server metrics, try
curl 10.221.188.20/metrics. For Orka operator metrics, try
In order to scrape the Orka server and operator metrics, add jobs to your Prometheus configuration:
scrape_configs: # ... - job_name: 'orka/orka-server' scrape_interval: 30s scrape_timeout: 30s metrics_path: /metrics scheme: http static_configs: - targets: ['10.221.188.20'] labels: service: 'orka-server' - job_name: 'orka/orka-operator' scrape_interval: 30s scrape_timeout: 30s metrics_path: /metrics scheme: http static_configs: - targets: ['10.221.188.20:8080'] labels: service: 'orka-operator'
Prometheus Node Exporters
Every node in the Orka cluster runs a Prometheus Node Exporter on port
9100. This includes both Intel and ARM nodes. To ensure you are able to scrape the node exporter data, try cURLing the metrics endpoint from any node:
curl -I http://10.221.188.31:9100/metrics
If the node exporter is running and reachable from outside the cluster, you should receive a response of
If your Prometheus instance is hosted outside of the cluster, make sure that TCP traffic is permitted to port
9100for all hosts on the Orka private network! For more information, see the section on IP plans.
In order to scrape the node exporter data, add a job to your Prometheus configuration. For example:
scrape_configs: # ... - job_name: 'orka/node-exporter' scrape_interval: 5s static_configs: - targets: ['10.221.188.5:9100', '10.221.188.6:9100', '10.221.188.7:9100'] labels: group: 'master' - targets: ['10.221.188.31:9100', '10.221.188.32:9100', '10.221.188.33:9100'] labels: group: 'x86' - targets: ['10.221.188.34:9100'] labels: group: 'arm'
The above configuration will work well for a small cluster with only a few Orka nodes. However, for a larger cluster, it is recommended to use the Prometheus instance running in-cluster that is configured to use Kubernetes service discovery.
As an alternative to the static config, you can use file-based service discovery to scrape the targets
Updated 8 months ago