CODEWITHSUNDEEP
kuberneteskubectl
Dev
Dev

Reputation: 13773

List non-suspended cronjobs using kubectl

How to select SUSPEND=False cronjob?

--selector can't be used as suspend is not added in the labels.

Upvotes: 0

Views: 926

Answers (2)

Tim Friske
Tim Friske

Reputation: 2052

By using a JSONPath expression and passing it via the --output=jsonpath= option to kubectl I was able to select only cronjobs which are unsuspended and print their names as follows:

kubectl get cronjob --output=jsonpath='{range .items[?(.spec.suspend==false)]}{.metadata.name}{"\n"}{end}'

In order yo invert the selection you can simply filter on spec.suspend==true instead of false, i.e.:

kubectl get cronjob --output=jsonpath='{range .items[?(.spec.suspend==true)]}{.metadata.name}{"\n"}{end}'

For explicitness you can additionally pass the --no-headers like so, even though the former command already does not print any headers:

kubectl get cronjob --no-headers --output=jsonpath='{range .items[?(.spec.suspend==false)]}{.metadata.name}{"\n"}{end}'

Last but not least you can combine the commands above with Kubernetes selector expressions; for example:

kubectl get cronjob --selector=sometagkey==sometagvalue --no-headers --output=jsonpath='{range .items[?(.spec.suspend==false)]}{.metadata.name}{"\n"}{end}'

Upvotes: 1

Olivercodes
Olivercodes

Reputation: 1058

you can't select spec.suspend on a kubectl filter.

You could make your own jq filter

(this is just an example and could be a lot cleaner)

k get cronjob --output=json | 
  jq -c 'select( .items[].spec.suspend == false)' | 
  jq  '.items[] | .metadata.name + " " + .spec.schedule + " "
  + (.spec.suspend|tostring) + " " + .spec.active'

Or if you don't mind a little golang

// Look at https://github.com/kubernetes/client-go/blob/master/examples/out-of-cluster-client-configuration/main.go 
// for the other parameters (like using current kubectl context).
func getCronsBySuspend(clientset *kubernetes.Clientset, namespace string) {
    cjs, err := clientset.BatchV1().CronJobs(namespace).List(context.TODO(), metav1.ListOptions{})
    if err != nil {
        panic(err.Error())
    }

    var c []string
    for _, cron := range cjs.Items {
        if *cron.Spec.Suspend == false {
            c = append(c, cron.Name)
        }
    }

    fmt.Printf("%v", c)
}

Upvotes: 1

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