coredns/plugin/kubernetes/watch.go
Andras Spitzer 7dde3f3958 Fix for #2842, instead of returning the first Pod, return the one whi… (#2846)
* Fix for #2842, instead of returning the first Pod, return the one which is Running

* a more memory efficient version of the fix, string -> bool

* fix with no extra fields in struct, return nil at Pod conversion if Pod is not Running

* let Kuberneretes filter for Running Pods using FieldSelector

* filter for Pods that are Running and Pending (implicit)
2019-05-29 08:06:45 +01:00

52 lines
1.7 KiB
Go

package kubernetes
import (
meta "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/watch"
"k8s.io/client-go/kubernetes"
)
func serviceWatchFunc(c kubernetes.Interface, ns string, s labels.Selector) func(options meta.ListOptions) (watch.Interface, error) {
return func(options meta.ListOptions) (watch.Interface, error) {
if s != nil {
options.LabelSelector = s.String()
}
w, err := c.CoreV1().Services(ns).Watch(options)
return w, err
}
}
func podWatchFunc(c kubernetes.Interface, ns string, s labels.Selector) func(options meta.ListOptions) (watch.Interface, error) {
return func(options meta.ListOptions) (watch.Interface, error) {
if s != nil {
options.LabelSelector = s.String()
}
if len(options.FieldSelector) > 0 {
options.FieldSelector = options.FieldSelector + ","
}
options.FieldSelector = options.FieldSelector + "status.phase!=Succeeded,status.phase!=Failed,status.phase!=Unknown"
w, err := c.CoreV1().Pods(ns).Watch(options)
return w, err
}
}
func endpointsWatchFunc(c kubernetes.Interface, ns string, s labels.Selector) func(options meta.ListOptions) (watch.Interface, error) {
return func(options meta.ListOptions) (watch.Interface, error) {
if s != nil {
options.LabelSelector = s.String()
}
w, err := c.CoreV1().Endpoints(ns).Watch(options)
return w, err
}
}
func namespaceWatchFunc(c kubernetes.Interface, s labels.Selector) func(options meta.ListOptions) (watch.Interface, error) {
return func(options meta.ListOptions) (watch.Interface, error) {
if s != nil {
options.LabelSelector = s.String()
}
w, err := c.CoreV1().Namespaces().Watch(options)
return w, err
}
}