Kubernetes deployment fails with 'ImagePullBackOff' on private Docker registry despite secret configuration
I'm trying to figure out I'm updating my dependencies and I'm stuck on something that should probably be simple... I'm currently trying to deploy an application on Kubernetes that relies on an image hosted in a private Docker registry. My deployment keeps failing with the error `ImagePullBackOff`. I’ve double-checked the image name and tag, and it seems correct. Here's the relevant part of my deployment YAML: ```yaml apiVersion: apps/v1 kind: Deployment metadata: name: my-app spec: replicas: 2 selector: matchLabels: app: my-app template: metadata: labels: app: my-app spec: containers: - name: my-app-container image: myprivateregistry.com/myuser/my-app:latest imagePullSecrets: - name: my-registry-secret ``` To create the secret, I used the following command: ```bash kubectl create secret docker-registry my-registry-secret \ --docker-server=myprivateregistry.com \ --docker-username=myuser \ --docker-password=mypassword \ --docker-email=myemail@example.com ``` I’ve verified that the secret exists in the same namespace as the deployment and that it’s correctly referenced in the YAML. However, when I check the pod events, I see the following message: ``` Failed to pull image "myprivateregistry.com/myuser/my-app:latest": rpc error: code = Unknown desc = failed to resolve image "myprivateregistry.com/myuser/my-app:latest": no basic auth credentials ``` This indicates that Kubernetes can’t authenticate with the registry. I’ve tried recreating the secret and even using `kubectl get secret my-registry-secret -o yaml` to ensure the secret has the right credentials encoded. Additionally, I checked the service account that my pods are using, and it appears to be the default service account which should have access to the image pull secrets as per the documentation. The namespace is set up correctly, and I’ve also confirmed that the Docker registry is reachable from my cluster. Could there be any additional configurations I’m missing, or is there a step that I might have overlooked? Any insights into resolving this would be greatly appreciated! Has anyone else encountered this? For context: I'm using Yaml on Ubuntu. The stack includes Yaml and several other technologies.