Kubernetes Deployment scenarios with ImagePullBackOff Despite Correct Image Name on v1.25
I'm having a hard time understanding After trying multiple solutions online, I still can't figure this out. I am experiencing an `ImagePullBackOff` behavior when trying to deploy my application on Kubernetes, even though I've verified that the image name is correct. I am using Kubernetes v1.25 with a Deployment that references an image stored in a private Docker registry. Here’s the relevant part of my deployment YAML: ```yaml apiVersion: apps/v1 kind: Deployment metadata: name: my-app spec: replicas: 3 selector: matchLabels: app: my-app template: metadata: labels: app: my-app spec: containers: - name: my-app-container image: myregistry.io/myusername/my-app:latest ports: - containerPort: 8080 ``` I also created a Kubernetes Secret for the Docker registry authentication: ```bash kubectl create secret docker-registry my-registry-secret \ --docker-server=https://myregistry.io \ --docker-username=myusername \ --docker-password=mypassword \ --docker-email=myemail@example.com ``` After creating the secret, I specified it in my deployment: ```yaml spec: imagePullSecrets: - name: my-registry-secret ``` Despite all this, when I check the pod status, I see: ``` $ kubectl get pods NAME READY STATUS RESTARTS AGE my-app-5cf67d8c7-8f5r2 0/1 ImagePullBackOff 0 2m ``` I’ve tried a few troubleshooting steps: - Checked the image name and tag for typos. - Validated that the secret was created in the same namespace as the deployment. - Executed `kubectl describe pod my-app-5cf67d8c7-8f5r2` to view the events, which showed: ``` Failed to pull image "myregistry.io/myusername/my-app:latest": rpc behavior: code = Unknown desc = behavior response from daemon: Get https://myregistry.io/v2/myusername/my-app/manifests/latest: unauthorized: incorrect username or password ``` The behavior suggests that the credentials might be incorrect, but I’ve double-checked my username and password. What could I be missing here? Is there a known scenario with Kubernetes v1.25 regarding image pulls from private registries, or is it possible that there's a configuration behavior in the secret? I'm on Debian using the latest version of Yaml. Am I approaching this the right way? Any feedback is welcome!