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utils_get.go
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utils_get.go
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package kubernetes
import (
"context"
"github.com/pkg/errors"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
typedappsv1 "k8s.io/client-go/kubernetes/typed/apps/v1"
)
func GetNodeList(ctx context.Context, clientset *kubernetes.Clientset) (*corev1.NodeList, error) {
nodes, err := clientset.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
if err != nil {
return nil, errors.Wrap(err, "failed to get nodes")
}
return nodes, nil
}
func GetNodeListByLabelSelector(ctx context.Context, clientset *kubernetes.Clientset, labelSelector string) (*corev1.NodeList, error) {
nodes, err := clientset.CoreV1().Nodes().List(ctx, metav1.ListOptions{LabelSelector: labelSelector})
if err != nil {
return nil, errors.Wrapf(err, "failed to get nodes with labelselector: %s", labelSelector)
}
return nodes, nil
}
func GetPodsByNode(ctx context.Context, clientset *kubernetes.Clientset, namespace, labelselector, nodeName string) (*corev1.PodList, error) {
pods, err := clientset.CoreV1().Pods(namespace).List(ctx, metav1.ListOptions{
FieldSelector: "spec.nodeName=" + nodeName,
LabelSelector: labelselector,
})
if err != nil {
return nil, errors.Wrapf(err, "failed to get pods by node %s", nodeName)
}
return pods, nil
}
func GetPodsIpsByNode(ctx context.Context, clientset *kubernetes.Clientset, namespace, labelselector, nodeName string) ([]string, error) {
pods, err := GetPodsByNode(ctx, clientset, namespace, labelselector, nodeName)
if err != nil {
return nil, errors.Wrap(err, "failed to get pods by node")
}
ips := make([]string, 0, len(pods.Items)*2) //nolint
for index := range pods.Items {
for _, podIP := range pods.Items[index].Status.PodIPs {
ips = append(ips, podIP.IP)
}
}
return ips, nil
}
func GetDeploymentAvailableReplicas(ctx context.Context, deploymentsClient typedappsv1.DeploymentInterface, deploymentName string) (int32, error) {
deployment, err := deploymentsClient.Get(ctx, deploymentName, metav1.GetOptions{})
if err != nil {
return -1, errors.Wrapf(err, "could not get deployment %s", deploymentName)
}
return deployment.Status.AvailableReplicas, nil
}