mirror of https://github.com/knative/docs.git
83 lines
2.9 KiB
Markdown
83 lines
2.9 KiB
Markdown
# Accessing metrics
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You access metrics through the [Grafana](https://grafana.com/) UI. Grafana is
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the visualization tool for [Prometheus](https://prometheus.io/).
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## Grafana
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1. To open Grafana, enter the following command:
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```shell
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kubectl port-forward --namespace knative-monitoring \
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$(kubectl get pods --namespace knative-monitoring \
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--selector=app=grafana --output=jsonpath="{.items..metadata.name}") \
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3000
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```
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- This starts a local proxy of Grafana on port 3000. For security reasons, the
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Grafana UI is exposed only within the cluster.
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2. Navigate to the Grafana UI at [http://localhost:3000](http://localhost:3000).
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3. Select the **Home** button on the top of the page to see the list of
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pre-installed dashboards (screenshot below):
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The following dashboards are pre-installed with Knative Serving:
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- **Revision HTTP Requests:** HTTP request count, latency, and size metrics per
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revision and per configuration
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- **Nodes:** CPU, memory, network, and disk metrics at node level
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- **Pods:** CPU, memory, and network metrics at pod level
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- **Deployment:** CPU, memory, and network metrics aggregated at deployment
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level
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- **Istio, Mixer and Pilot:** Detailed Istio mesh, Mixer, and Pilot metrics
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- **Kubernetes:** Dashboards giving insights into cluster health, deployments,
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and capacity usage
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4. Set up an administrator account to modify or add dashboards by signing in
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with username: `admin` and password: `admin`.
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- Before you expose the Grafana UI outside the cluster, make sure to change the
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password. You will be prompted to set a password on first login, and it can
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later be changed at
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[http://localhost:3000/org/users](http://localhost:3000/org/users).
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## Prometheus
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Although Grafana provides a richer set of graphing functionality, Prometheus can
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still be useful for debugging.
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1. To open Prometheus, enter the following command:
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```shell
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kubectl port-forward -n knative-monitoring \
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$(kubectl get pods -n knative-monitoring \
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--selector=app=prometheus --output=jsonpath="{.items[0].metadata.name}") \
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9090
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```
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- This starts a local proxy of Prometheus on port 9090. For security reasons,
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the Prometheus UI is exposed only within the cluster.
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2. Navigate to the Prometheus UI at
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[http://localhost:9090](http://localhost:9090)
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### Metrics Troubleshooting
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You can use the Prometheus web UI to troubleshoot publishing and service
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discovery issues for metrics.
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- To see the targets that are being scraped, go to Status -> Targets
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- To see what Prometheus service discovery is picking up vs. dropping, go to
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Status -> Service Discovery
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- To see a specific metric you can search for in the in search box on the top of
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the page
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---
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Except as otherwise noted, the content of this page is licensed under the
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[Creative Commons Attribution 4.0 License](https://creativecommons.org/licenses/by/4.0/),
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and code samples are licensed under the
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[Apache 2.0 License](https://www.apache.org/licenses/LICENSE-2.0).
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