mirror of https://github.com/k3s-io/k3s.git
104 lines
2.8 KiB
Go
104 lines
2.8 KiB
Go
package server
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import (
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"context"
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"os"
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"path/filepath"
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"time"
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"github.com/k3s-io/k3s/pkg/etcd"
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"github.com/sirupsen/logrus"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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)
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// setETCDLabelsAndAnnotations will set the etcd role label if not exists also it
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// sets special annotations on the node object which are etcd node id and etcd node
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// address, the function will also remove the controlplane and master role labels if
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// they exist on the node
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func setETCDLabelsAndAnnotations(ctx context.Context, config *Config) error {
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<-config.ControlConfig.Runtime.APIServerReady
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t := time.NewTicker(5 * time.Second)
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defer t.Stop()
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for range t.C {
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controlConfig := &config.ControlConfig
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sc, err := NewContext(ctx, controlConfig.Runtime.KubeConfigAdmin)
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if err != nil {
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logrus.Infof("Failed to set etcd role label: %v", err)
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continue
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}
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if err := sc.Start(ctx); err != nil {
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logrus.Infof("Failed to set etcd role label: %v", err)
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continue
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}
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controlConfig.Runtime.Core = sc.Core
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nodes := sc.Core.Core().V1().Node()
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nodeName := os.Getenv("NODE_NAME")
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if nodeName == "" {
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logrus.Info("Failed to set etcd role label: node name not set")
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continue
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}
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node, err := nodes.Get(nodeName, metav1.GetOptions{})
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if err != nil {
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logrus.Infof("Failed to set etcd role label: %v", err)
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continue
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}
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if node.Labels == nil {
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node.Labels = make(map[string]string)
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}
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// remove controlplane label if role label exists
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var controlRoleLabelExists bool
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if _, ok := node.Labels[MasterRoleLabelKey]; ok {
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delete(node.Labels, MasterRoleLabelKey)
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controlRoleLabelExists = true
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}
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if _, ok := node.Labels[ControlPlaneRoleLabelKey]; ok {
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delete(node.Labels, ControlPlaneRoleLabelKey)
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controlRoleLabelExists = true
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}
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if v, ok := node.Labels[ETCDRoleLabelKey]; ok && v == "true" && !controlRoleLabelExists {
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break
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}
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node.Labels[ETCDRoleLabelKey] = "true"
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// this is replacement to the etcd controller handleself function
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if node.Annotations == nil {
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node.Annotations = map[string]string{}
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}
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fileName := filepath.Join(controlConfig.DataDir, "db", "etcd", "name")
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data, err := os.ReadFile(fileName)
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if err != nil {
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logrus.Infof("Waiting for etcd node name file to be available: %v", err)
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continue
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}
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etcdNodeName := string(data)
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node.Annotations[etcd.NodeNameAnnotation] = etcdNodeName
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address, err := etcd.GetAdvertiseAddress(controlConfig.PrivateIP)
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if err != nil {
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logrus.Infof("Waiting for etcd node address to be available: %v", err)
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continue
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}
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node.Annotations[etcd.NodeAddressAnnotation] = address
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_, err = nodes.Update(node)
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if err == nil {
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logrus.Infof("Successfully set etcd role label and annotations on node %s", nodeName)
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break
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}
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select {
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case <-ctx.Done():
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return ctx.Err()
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}
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}
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return nil
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}
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