What kubectl command can I use to get events sorted by specific fields and print only specific details of events?
I need to print only specific fields of Kubernetes Events, sorted by a specific field.
This is to help me gather telemetry and analytics about my namespace
How could I do that?
kubectl get events --sort-by='.lastTimestamp'
Following command does it.
It prints the events sorted by timestamp of creation.
It also users go-template
to filter out specific fields of the kubernetes-event
object.
kubectl get events --sort-by='.metadata.creationTimestamp' -o 'go-template={{range .items}}{{.involvedObject.name}}{{"\t"}}{{.involvedObject.kind}}{{"\t"}}{{.message}}{{"\t"}}{{.reason}}{{"\t"}}{{.type}}{{"\t"}}{{.firstTimestamp}}{{"\n"}}{{end}}'
I am using the following command to sort it after timestamp
kubectl get event --all-namespaces --sort-by='.metadata.managedFields[0].time'
For filtering out the information you can of course combine it with the go-template described by @suryakrupa or with jq described by @Chris Stryczynski
If you don't mind seeing the output as JSON:
kubectl get event -o json | jq '.items |= sort_by(.lastTimestamp)'
This requires jq.
Here's the Bash function I use:
function kubectl-events {
{
echo $'TIME\tNAMESPACE\tTYPE\tREASON\tOBJECT\tSOURCE\tMESSAGE';
kubectl get events -o json "$@" \
| jq -r '.items | map(. + {t: (.eventTime//.lastTimestamp)}) | sort_by(.t)[] | [.t, .metadata.namespace, .type, .reason, .involvedObject.kind + "/" + .involvedObject.name, .source.component + "," + (.source.host//"-"), .message] | @tsv';
} \
| column -s $'\t' -t \
| less -S
}
You can use it like: kubectl-events -A
, kubectl-events -n foo
, etc.