Questions tagged [client-go]
208 questions
2
votes
0 answers
How to make a workqueue consistent across replicas in kubernetes custom controllers?
In the k8s.io/client-go package, we have a workqueue that is used for adding items to whenever informers detect changes to resources. I'm trying to figure out if there is a way, in the case we have multiple pods running the controllers, that the…
Aishwarya Nagaraj
- 29
- 1
2
votes
0 answers
How to unit test a function that uses leaderelection.RunOrDie
Here's a (somewhat simplified) bit of code that exposes a boolean if we've become leader via K8s leader election and false otherwise:
type SimpleLeader struct {
amLeader atomic.Value
}
func (s *SimpleLeader) run(ctx context.Context, client…
d80tb7
- 863
- 2
- 9
- 20
2
votes
1 answer
Continuously Watch Pods in Kubernetes using golang SDK
I want to watch changes to Pods continuously using the client-go Kubernetes SDK. I am using the below code to watch the changes:
func (c *Client) watchPods(namespace string, restartLimit int) {
fmt.Println("Watch Kubernetes Pods")
watcher,…
Faizan
- 181
- 1
- 1
- 11
2
votes
0 answers
Why does Replica status value not get reflected while using mock client-go?
Background
Objective is to write a unit test in golang to check whether given deployment in a namespace is up or not. I am using the library "k8s.io/client-go/kubernetes/fake" to do the same.
These are the steps I plan to execute:
Creata mock…
ayivaak
- 67
- 8
2
votes
2 answers
Client-Go, How to watch for newly created Pods in Kubernetes
I need to write a golang application with the help of client-go which will listen/watch a particular namespace for any of these events:
A new pod has been created
A pod has been deleted
A new container has been added to existing pods
Image for…
Jananath Banuka
- 2,951
- 8
- 57
- 105
2
votes
1 answer
Undefined error in go-client when listing the nodes
I am new to golang and I am trying to list the nodes in my minikube cluster with the client-go. And I encounter the following issue:
nodeList.Items undefined (type *invalid type has no field or method Items)compilerMissingFieldOrMethod
And here's…
Jananath Banuka
- 2,951
- 8
- 57
- 105
2
votes
0 answers
Kubectl exec with client-go does not stream output in GitLab CI pipeline
I'm trying to execute a command (e.g. curl) in a pod and evaluate the stdout of that command on my client. This works perfectly fine on my machine, however not when executed in a GitLab pipeline. The command itself is executed in both cases, however…
Sirea
- 53
- 4
2
votes
0 answers
Tests fail when trying to list kubernetes CRD objects using ListOptions' Limit
I'm trying to list CRD objects using Limit as follows:
...
someObjList := v1alpha1.SomeObjList{}
_ = cl.List(ctx, &someObjList, client.InNamespace(lib.Namespace), &listOptions)
When testing, I add 25 objects to a fake client then call the list…
Sara Taha
- 73
- 7
2
votes
1 answer
How to get the latest change time of StatefulSet in k8s
I know, for example, that you can get the lastUpdateTime of a Deployment with kubectl:
kubectl get deploy -o jsonpath={.status.conditions[1].lastUpdateTime}
Or via client-go:
func deploymentCheck(namespace string, clientset…
Kaio H. Cunha
- 211
- 2
- 10
2
votes
1 answer
What type of edits will change a ReplicaSet and StatefulSet AGE?
What type of edits will change a ReplicaSet and StatefulSet AGE(CreationTimeStamp)?
I'm asking this because I noticed that
If I change a Deployment image, a new ReplicaSet will be created.
The old ReplicaSet continues to exist with DESIRED set to…
Kaio H. Cunha
- 211
- 2
- 10
2
votes
0 answers
List Events for Pod using client-go in readable format
I am using the below client-go function to list the events for a particular pod in a specified namespace.
events, _ := clientset.CoreV1().Events("namespaceName").List(context.TODO(), metav1.ListOptions{FieldSelector: "involvedObject.name=podName",…
Akash
- 73
- 7
2
votes
1 answer
Retrieve kubernetes nodes that do not contain label using apimachinery/client-go
I want to fetch the list (if any) of kubernetes nodes that do not contain a label.
I have managed to do the opposite using client-go
labelSelector := metav1.LabelSelector{
MatchLabels: map[string]string{
"somelabel":…
pkaramol
- 16,451
- 43
- 149
- 324
2
votes
2 answers
SharedInformerFactoryWithOptions - Not able to filter based on labels
I want to watch Kubernetes pod events for a certain application.
I went with NewSharedInformerFactoryWithOptions. I have added appropriate labels selector, But it is not getting filtered out. As I want to filter it using the label:…
ankit
- 324
- 1
- 4
- 11
2
votes
1 answer
How can I get events messages from a pod from Kubernetes using client-go API?
How can I get events messages from a pod, like this command using client-go Kubernetes API:
kubectl describe pod spark-t2f59 -n spark
Events:
Type Reason Age From Message
---- ------ ---- ---- …
javier_orta
- 457
- 4
- 15
2
votes
0 answers
kubernetes go-client: How to refresh token, using kubeconfig file
While trying to connect to kubernetes cluster using kubeconfig file I am getting below mentioned error
Response: {"error":"invalid_request","error_description":"Refresh token is invalid or has already been claimed by another client."}
Following is…
Nishant Gaurav
- 38
- 6