Kubernetes is a powerful orchestration tool, but it can be tricky to debug applications running on it. In this article, we'll take a look at two important tools for debugging Kubernetes applications: events and logs.
Events are a great way to get visibility into what's happening inside a Kubernetes cluster. To view events, use the kubectl
command:
kubectl get events
This will return a list of all the events in the cluster, along with their timestamps, types, and so on.
Events can be filtered by label, so if you want to see only the events related to a particular pod, you can use the --selector
flag:
kubectl get events --selector=app=nginx
It's also possible to see the events for a particular namespace:
kubectl get events --namespace=default
Finally, you can use the --since
flag to only get events that have occurred since a certain time:
kubectl get events --since=2019-01-01T00:00:00Z
In addition to events, logs are another important tool for debugging Kubernetes applications. To get the logs for a pod, use the kubectl
command:
kubectl logs POD_NAME
Replace POD_NAME
with the name of the pod you want to get the logs for.
It's also possible to get the logs for all the pods in a deployment:
kubectl logs DEPLOYMENT_NAME
Replace DEPLOYMENT_NAME
with the name of the deployment you want to get the logs for.
Finally, you can use the --since
flag to only get logs that have been generated since a certain time:
kubectl logs --since=2019-01-01T00:00:00Z
In this article, we've looked at two important tools for debugging Kubernetes applications: events and logs. Events are a great way to get visibility into what's happening inside a Kubernetes cluster, and logs can be used to troubleshoot problems with your applications.