/
own_resources.go
195 lines (172 loc) · 5.13 KB
/
own_resources.go
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package util
import (
"context"
"errors"
"fmt"
"os"
"github.com/go-logr/logr"
csvv1alpha1 "github.com/operator-framework/api/pkg/operators/v1alpha1"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// OwnResources holds the running POd, Deployment and CSV, if exist
type OwnResources struct {
pod *corev1.Pod
deployment *appsv1.Deployment
csv *csvv1alpha1.ClusterServiceVersion
}
// GetPod returns the running pod, or nil if not exists
func (or *OwnResources) GetPod() *corev1.Pod {
if or == nil {
return nil
}
return or.pod
}
// GetDeployment returns the deployment that controls the running pod, or nil if not exists
func (or *OwnResources) GetDeployment() *appsv1.Deployment {
if or == nil {
return nil
}
return or.deployment
}
// GetCSV returns the CSV that defines the application, or nil if not exists
func (or *OwnResources) GetCSV() *csvv1alpha1.ClusterServiceVersion {
if or == nil {
return nil
}
return or.csv
}
func findOwnResources(ctx context.Context, cl client.Reader, logger logr.Logger) (or *OwnResources) {
or = &OwnResources{}
if !GetClusterInfo().IsRunningLocally() {
var err error
or.pod, err = getPod(ctx, cl, logger)
if err != nil {
or.pod = nil
logger.Error(err, "Can't get self pod")
}
operatorNs, err := GetOperatorNamespace(logger)
if err != nil {
logger.Error(err, "Can't get operator namespace")
return
}
or.deployment, err = getDeploymentFromPod(or.pod, cl, operatorNs, logger)
if err != nil {
logger.Error(err, "Can't get deployment")
return
}
if GetClusterInfo().IsManagedByOLM() {
var err error
or.csv, err = getCSVFromDeployment(or.deployment, cl, operatorNs, logger)
if err != nil {
logger.Error(err, "Can't get CSV")
or.csv = nil
}
}
} else {
deployment := &appsv1.Deployment{}
err := cl.Get(context.TODO(), client.ObjectKey{
Namespace: os.Getenv("OPERATOR_NAMESPACE"),
Name: "hyperconverged-cluster-operator",
}, deployment)
if err != nil {
logger.Error(err, "Can't get deployment")
return
}
or.deployment = deployment
or.pod = nil
or.csv = nil
}
return
}
func getPod(ctx context.Context, c client.Reader, logger logr.Logger) (*corev1.Pod, error) {
ci := GetClusterInfo()
operatorNs, err := GetOperatorNamespace(logger)
if err != nil {
logger.Error(err, "Failed to get HCO namespace")
return nil, err
}
// This is taken from k8sutil.getPod. This method only receives client. But the client is not always ready. We'll
// use --- instead
if ci.IsRunningLocally() {
return nil, nil
}
podName := os.Getenv(PodNameEnvVar)
if podName == "" {
return nil, fmt.Errorf("required env %s not set, please configure downward API", PodNameEnvVar)
}
pod := &corev1.Pod{}
key := client.ObjectKey{Namespace: operatorNs, Name: podName}
err = c.Get(ctx, key, pod)
if err != nil {
logger.Error(err, "Failed to get Pod", "Pod.Namespace", operatorNs, "Pod.Name", podName)
return nil, err
}
// .Get() clears the APIVersion and Kind,
// so we need to set them before returning the object.
pod.TypeMeta.APIVersion = "v1"
pod.TypeMeta.Kind = "Pod"
logger.Info("Found Pod", "Pod.Namespace", operatorNs, "Pod.Name", pod.Name)
return pod, nil
}
func getDeploymentFromPod(pod *corev1.Pod, c client.Reader, operatorNs string, logger logr.Logger) (*appsv1.Deployment, error) {
if pod == nil {
return nil, nil
}
rsReference := metav1.GetControllerOf(pod)
if rsReference == nil || rsReference.Kind != "ReplicaSet" {
err := errors.New("failed getting HCO replicaSet reference")
logger.Error(err, "Failed getting HCO replicaSet reference")
return nil, err
}
rs := &appsv1.ReplicaSet{}
err := c.Get(context.TODO(), client.ObjectKey{
Namespace: operatorNs,
Name: rsReference.Name,
}, rs)
if err != nil {
logger.Error(err, "Failed to get HCO ReplicaSet")
return nil, err
}
dReference := metav1.GetControllerOf(rs)
if dReference == nil || dReference.Kind != "Deployment" {
err = errors.New("failed getting HCO deployment reference")
logger.Error(err, "Failed getting HCO deployment reference")
return nil, err
}
deployment := &appsv1.Deployment{}
err = c.Get(context.TODO(), client.ObjectKey{
Namespace: operatorNs,
Name: dReference.Name,
}, deployment)
if err != nil {
logger.Error(err, "Failed to get HCO Deployment")
return nil, err
}
return deployment, nil
}
func getCSVFromDeployment(d *appsv1.Deployment, c client.Reader, operatorNs string, logger logr.Logger) (*csvv1alpha1.ClusterServiceVersion, error) {
var csvReference *metav1.OwnerReference
for _, owner := range d.GetOwnerReferences() {
if owner.Kind == "ClusterServiceVersion" {
csvReference = &owner
}
}
if csvReference == nil {
err := errors.New("failed getting HCO CSV reference")
logger.Error(err, "Failed getting HCO CSV reference")
return nil, err
}
csv := &csvv1alpha1.ClusterServiceVersion{}
err := c.Get(context.TODO(), client.ObjectKey{
Namespace: operatorNs,
Name: csvReference.Name,
}, csv)
if err != nil {
logger.Error(err, "Failed to get HCO CSV")
return nil, err
}
return csv, nil
}