A kubectl Krew plugin to lists all restarts in your cluster and show you pods last start times.
Icon art made by Pixelmeetup from Flaticon. We had one before Krew itself, go figure.
If you don't use Krew to manage kubectl plugins you can simply download the binary here and put it in your PATH.
kubectl krew install pod-restarts
kubectl pod-restarts
$ kubectl pod-restarts --help
This command prints a table with all the restarting pods inside
your cluster and the lookup can be restricted to a specific namespace, based
on a minimum threshold for restarts or just count containers restarts too.
The purpose of this is to have a glance at what has been failing and since
when, as age and start times are included in the result table. The alternative to
that would be to run multiple shell commands with complex parsing or plot N graphs
with Prometheus or other tool.
Usage:
pod-restarts [flags]
Examples:
Cluster-wide listing
$ kubectl pod-restarts
Restricts listing to a namespace (faster in big clusters)
$ kubectl pod-restarts -n production
Ignores pods below a specific threshold (10 restarts)
$ kubectl pod-restarts -t 10
Also lists all the containers restarting inside the pods
$ kubectl pod-restarts -c
Sort Hashicorp's Vault pods by last start time (can be used with -c too)
$ kubectl pod-restarts -n vault --sort-by=start
Flags:
-c, --containers Also lists containers restarts, ignoring thresholds
-h, --help help for pod-restarts
-n, --namespace string If present, the namespace scope for this CLI request
--sort-by string Sort results by: restarts, age, start
-t, --threshold int32 Only list restarts above the given threshold
$ kubectl pod-restarts -c -n istio-system
NAMESPACE RESTARTS NAME AGE START
istio-system 4 istio-policy-86978d4c49-7wvdj/mixer 35s 2020-01-22 12:29:09 -0300 -03
istio-system 4 istio-policy-86978d4c49-v7fxb/mixer 15d 2020-01-22 12:29:12 -0300 -03
istio-system 5 istio-telemetry-7c5b6c9975-cj2vq/mixer 120d 2020-01-22 12:29:10 -0300 -03
istio-system 5 istio-telemetry-7c5b6c9975-h2c6s/mixer 120d 2020-01-22 12:29:15 -0300 -03
$ kubectl pod-restarts -n kafka
NAMESPACE RESTARTS NAME AGE START
kafka 7 kafka-operator-entity-operator-66d6d5965-zbwmq 72h 2020-01-22 12:29:11 -0300 -03
kafka 2 strimzi-topic-operator-6fc5484b85-996sx 90m 2020-01-22 12:29:11 -0300 -03
$ kubectl pod-restarts -n kafka -t 5
NAMESPACE RESTARTS NAME AGE START
kafka 7 kafka-operator-entity-operator-66d6d5965-zbwmq 72h 2020-01-22 12:29:11 -0300 -03