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If you have not yet installed the logging and monitoring components, go through the installation instructions to set up the necessary components first.
Kibana and Elasticsearch
- To open the Kibana UI (the visualization tool for Elasticsearch), start a local proxy with the following command:
This command starts a local proxy of Kibana on port 8001. For security reasons, the Kibana UI is exposed only within the cluster.
- Navigate to the Kibana UI. It might take a couple of minutes for the proxy to work.
The Discover tab of the Kibana UI looks like this:
You can change the time frame of logs Kibana displays in the upper right corner of the screen. The main search bar is across the top of the Discover page.
- As more logs are ingested, new fields will be discovered. To have them indexed, go to “Management” > “Index Patterns” > Refresh button (on top right) > “Refresh fields”.
Accessing stdout/stderr logs
To find the logs sent to
stdout/stderr from your application in the Kibana UI:
Discoveron the left side bar.
logstash-*index pattern on the left top.
tag: kubernetes*in the top search bar then search.
Accessing request logs
To access the request logs (if enabled), enter the following search in Kibana:
Request logs contain customized details about requests served by the revision. Below is a sample request log:
@timestamp July 10th 2018, 10:09:28.000 kubernetes.labels.serving_knative_dev/configuration helloworld-go kubernetes.labels.serving_knative_dev/revision helloworld-go-6vf4x kubernetes.labels.serving_knative_dev/service helloworld-go httpRequest.protocol HTTP/1.1 httpRequest.referer httpRequest.remoteIp 10.32.0.2:46866 httpRequest.requestMethod GET httpRequest.requestSize 0 httpRequest.requestUrl / httpRequest.responseSize 20 httpRequest.serverIp 10.32.1.36 httpRequest.status 200 httpRequest.userAgent curl/7.60.0 traceId 0def9abf835ad90e9d824f7a492e2dcb
Accessing configuration and revision logs
To access the logs for a configuration:
Find the configuration’s name with the following command:
kubectl get configurations
<CONFIGURATION_NAME>and enter the following search query in Kibana:
To access logs for a revision:
Find the revision’s name with the following command:
kubectl get revisions
<REVISION_NAME>and enter the following search query in Kibana:
Accessing end to end request traces
See Accessing Traces page for details.
Go to the GCP Console logging page for your GCP project, which stores your logs via Stackdriver.
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