---
title: "Kubernetes ImagePullBackOff and ErrImagePull: Causes and Fixes"
url: https://daily.dev/posts/kubernetes-imagepullbackoff-and-errimagepull-causes-and-fixes-fawsope37
source_url: https://cast.ai/blog/imagepullbackoff
type: article
source: "Cast AI"
published: 2026-07-03T11:16:28.320Z
updated: 2026-07-03T11:16:52.471Z
tags: ["kubernetes", "docker", "containers"]
reading_time: 15
upvotes: 0
comments: 0
language: en
---

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# Kubernetes ImagePullBackOff and ErrImagePull: Causes and Fixes

**[Cast AI](https://daily.dev/sources/castai)** · 15 min read · 0 upvotes · 0 comments

## Summary

ImagePullBackOff and ErrImagePull are two states in the same Kubernetes retry loop — ErrImagePull fires on the first failed pull, ImagePullBackOff is the waiting state between retries (exponential backoff capping at 5 minutes). Eight distinct root causes are covered: wrong image name or tag, missing imagePullSecret, expired credentials (including ECR's 12-hour token expiry), Docker Hub rate limits, unreachable registry, imagePullPolicy: Never, and architecture mismatch. For each cause, the exact error string visible in `kubectl describe pod` Events is mapped to a concrete fix, with ready-to-use kubectl commands and YAML examples. Key operational tips include patching the default ServiceAccount to inherit pull credentials namespace-wide, using IRSA/workload identity for cloud registries in production, and forcing an immediate retry after a fix via `kubectl delete pod` or `kubectl rollout restart` rather than waiting out the backoff timer.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://cast.ai/blog/imagepullbackoff>

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---

Tags: [#kubernetes](https://daily.dev/tags/kubernetes), [#docker](https://daily.dev/tags/docker), [#containers](https://daily.dev/tags/containers)

[View this post on daily.dev](https://daily.dev/posts/kubernetes-imagepullbackoff-and-errimagepull-causes-and-fixes-fawsope37)