I have a Kubernetes cluster with several (unknown number, as more can be created at run time) pods with have a label prefix of x=y. Based on this prefix (x=), how can I programmatically get a list of all the y values?
You need to do something like bellow:
# kClient ---> Kubernetes Client
# List all the pods from all namespaces
podList, err := es.kClient.CoreV1().Pods(core.NamespaceAll).List(context.TODO(), metav1.ListOptions{})
if err != nil {
log.Fatal(err)
}
# Store answer in Ys
var Ys []string
# Loop over all the pods, and check for the label key "x"
# If "x" exists, store the value of "y" in Ys.
for _, pod := range podList.Items {
if y, exists := pod.Labels["x"]; exists {
Ys = append(Ys, y)
}
}
fmt.Println(Ys)
Use kubernetes client coreV1Api to list the pods matching the labels.
coreV1Api.list_namespaced_pod(namespace=<namespace>, label_selector="X=Y")