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Extract operations into internal pkg
This reduces the global variables, and regroups all the operations in a single place. This will allow further refactor to represent all the k8s operations kured needs on a single node. Signed-off-by: Jean-Philippe Evrard <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| package k8soperations | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
| "k8s.io/api/core/v1" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/types" | ||
| "k8s.io/client-go/kubernetes" | ||
| "log/slog" | ||
| "strings" | ||
| ) | ||
|
|
||
| const ( | ||
| KuredNodeWasUnschedulableBeforeDrainAnnotation string = "kured.dev/node-unschedulable-before-drain" | ||
| ) | ||
|
|
||
| func AddNodeAnnotations(client *kubernetes.Clientset, nodeID string, annotations map[string]string) error { | ||
| node, err := client.CoreV1().Nodes().Get(context.TODO(), nodeID, metav1.GetOptions{}) | ||
| if err != nil { | ||
| return fmt.Errorf("error retrieving node object via k8s API: %v", err) | ||
| } | ||
| for k, v := range annotations { | ||
| node.Annotations[k] = v | ||
| slog.Debug(fmt.Sprintf("adding node annotation: %s=%s", k, v), "node", node.GetName()) | ||
| } | ||
|
|
||
| bytes, err := json.Marshal(node) | ||
| if err != nil { | ||
| return fmt.Errorf("error marshalling node object into JSON: %v", err) | ||
| } | ||
|
|
||
| _, err = client.CoreV1().Nodes().Patch(context.TODO(), node.GetName(), types.StrategicMergePatchType, bytes, metav1.PatchOptions{}) | ||
| if err != nil { | ||
| var annotationsErr string | ||
| for k, v := range annotations { | ||
| annotationsErr += fmt.Sprintf("%s=%s ", k, v) | ||
| } | ||
| return fmt.Errorf("error adding node annotations %s via k8s API: %v", annotationsErr, err) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func DeleteNodeAnnotation(client *kubernetes.Clientset, nodeID, key string) error { | ||
| // JSON Patch takes as path input a JSON Pointer, defined in RFC6901 | ||
| // So we replace all instances of "/" with "~1" as per: | ||
| // https://tools.ietf.org/html/rfc6901#section-3 | ||
| patch := []byte(fmt.Sprintf("[{\"op\":\"remove\",\"path\":\"/metadata/annotations/%s\"}]", strings.ReplaceAll(key, "/", "~1"))) | ||
| _, err := client.CoreV1().Nodes().Patch(context.TODO(), nodeID, types.JSONPatchType, patch, metav1.PatchOptions{}) | ||
| if err != nil { | ||
| return fmt.Errorf("error deleting node annotation %s via k8s API: %v", key, err) | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func updateNodeLabels(client *kubernetes.Clientset, node *v1.Node, labels []string) error { | ||
| labelsMap := make(map[string]string) | ||
| for _, label := range labels { | ||
| k := strings.Split(label, "=")[0] | ||
| v := strings.Split(label, "=")[1] | ||
| labelsMap[k] = v | ||
| slog.Debug(fmt.Sprintf("Updating node %s label: %s=%s", node.GetName(), k, v), "node", node.GetName()) | ||
| } | ||
|
|
||
| bytes, err := json.Marshal(map[string]interface{}{ | ||
| "metadata": map[string]interface{}{ | ||
| "labels": labelsMap, | ||
| }, | ||
| }) | ||
| if err != nil { | ||
| return fmt.Errorf("error marshalling node object into JSON: %v", err) | ||
| } | ||
|
|
||
| _, err = client.CoreV1().Nodes().Patch(context.TODO(), node.GetName(), types.StrategicMergePatchType, bytes, metav1.PatchOptions{}) | ||
| if err != nil { | ||
| var labelsErr string | ||
| for _, label := range labels { | ||
| k := strings.Split(label, "=")[0] | ||
| v := strings.Split(label, "=")[1] | ||
| labelsErr += fmt.Sprintf("%s=%s ", k, v) | ||
| } | ||
| return fmt.Errorf("error updating node labels %s via k8s API: %v", labelsErr, err) | ||
| } | ||
| return nil | ||
| } |
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