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helmvm_nodes.go
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helmvm_nodes.go
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package embeddedcluster
import (
"context"
"github.com/pkg/errors"
"github.com/replicatedhq/kots/pkg/embeddedcluster/types"
"github.com/replicatedhq/kots/pkg/k8sutil"
"github.com/replicatedhq/kots/pkg/util"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes"
metricsv "k8s.io/metrics/pkg/client/clientset/versioned"
)
// GetNodes will get a list of nodes with stats
func GetNodes(ctx context.Context, client kubernetes.Interface) (*types.EmbeddedClusterNodes, error) {
nodes, err := client.CoreV1().Nodes().List(ctx, metav1.ListOptions{})
if err != nil {
return nil, errors.Wrap(err, "list nodes")
}
clientConfig, err := k8sutil.GetClusterConfig()
if err != nil {
return nil, errors.Wrap(err, "failed to get cluster config")
}
metricsClient, err := metricsv.NewForConfig(clientConfig)
if err != nil {
return nil, errors.Wrap(err, "failed to create metrics client")
}
toReturn := types.EmbeddedClusterNodes{
IsEmbeddedClusterEnabled: util.IsEmbeddedCluster(),
}
for _, node := range nodes.Items {
nodeMet, err := nodeMetrics(ctx, client, metricsClient, node)
if err != nil {
return nil, errors.Wrap(err, "node metrics")
}
toReturn.Nodes = append(toReturn.Nodes, *nodeMet)
}
isHA, err := IsHA(client)
if err != nil {
return nil, errors.Wrap(err, "is ha")
}
toReturn.HA = isHA
return &toReturn, nil
}
func findNodeConditions(conditions []corev1.NodeCondition) types.NodeConditions {
discoveredConditions := types.NodeConditions{}
for _, condition := range conditions {
if condition.Type == "MemoryPressure" {
discoveredConditions.MemoryPressure = condition.Status == corev1.ConditionTrue
}
if condition.Type == "DiskPressure" {
discoveredConditions.DiskPressure = condition.Status == corev1.ConditionTrue
}
if condition.Type == "PIDPressure" {
discoveredConditions.PidPressure = condition.Status == corev1.ConditionTrue
}
if condition.Type == "Ready" {
discoveredConditions.Ready = condition.Status == corev1.ConditionTrue
}
}
return discoveredConditions
}
func isConnected(node corev1.Node) bool {
for _, taint := range node.Spec.Taints {
if taint.Key == "node.kubernetes.io/unreachable" {
return false
}
}
return true
}
func isReady(node corev1.Node) bool {
for _, condition := range node.Status.Conditions {
if condition.Type == "Ready" {
return condition.Status == corev1.ConditionTrue
}
}
return false
}
func isPrimary(node corev1.Node) bool {
for label := range node.ObjectMeta.Labels {
if label == "node-role.kubernetes.io/master" {
return true
}
if label == "node-role.kubernetes.io/control-plane" {
return true
}
}
return false
}