kurt

kurt: KUbernetes Restart Tracker

A restart tracker that gives context to what is restarting in your cluster

Usage:
  kurt [command]

Available Commands:
  all         Print all groupings collected by kurt!
  completion  generate the autocompletion script for the specified shell
  help        Help about any command
  labels      Only print restart counts grouped by labels
  namespaces  Only print namespace-wide restart counts
  nodes       Only print node restart counts
  pods        Only print pod restart counts
  version     Print the current version and exit

Flags:
  -h, --help                help for kurt
  -l, --label strings       Specify multiple times for the label keys you want to see.
                            For example: "kurt all -l app"
  -c, --limit int           Limit the number of resources you want to see. Set limit to 0 for no limits. Must be positive.
                            For example: "kurt all -c=10" (default 5)
  -n, --namespace strings   Specify namespace for kurt to collect restart metrics.
                            Leave blank to collect in all namespaces.
  -o, --output string       Specify output type. Options are: json, yaml, standard
                            For example: "kurt all -o json" (default "standard")

Use "kurt [command] --help" for more information about a command.

Install

Head over to our releases page or run as a kubectl plugin with krew

kubectl krew install kurt

Easily install krew and kurt with the following:

curl https://krew.sh/kurt | bash

Examples

Show the top 5 highest restart counts grouped by Namespace, Node, Label, and Pod:

$ kurt all

kurt: KUbernetes Restart Tracker

==========

 Namespace      Restarts

 default        2
 test           1
 kube-system    0

==========

 Node           Restarts

 minikube-m02   2
 minikube-m03   1
 minikube       0

==========

 Label                                          Restarts

 run:nginx                                      3
 component:etcd                                 0
 k8s-app:kube-proxy                             0
 addonmanager.kubernetes.io/mode:Reconcile      0
 integration-test:storage-provisioner           0

==========

 Pod                            Namespace       Restarts

 nginx                          default         2
 nginx                          test            1
 kube-apiserver-minikube        kube-system     0
 storage-provisioner            kube-system     0
 etcd-minikube                  kube-system     0

Show more results:

kurt all -c 10

# use -c 0 if you want to show all results

Show which node has the most restarted pods:

kurt no

Show top 20 pod restart counts in the default namespace which also have the app label key:

kurt po -n default -l app -c 20

Get help:

kurt -h

Structured output:

# With structured output you could use a script like this to delete the top rebooting pod

JSON=$(kurt pods -o json)
POD=$(echo $JSON | jq -r .pods[0].name)
NS=$(echo $JSON | jq -r .pods[0].namespace)
kubectl delete pod $POD -n $NS

Permissions

As seen in the cmd/collect.go file the only permission required for kurt is pods/list.

Requirements

Go Version 1.21

Building

go build .

Outputs a kurt binary

Testing

go test ./cmd -v