CRI-O CRI-O logs show 'image not found'

The specified image might not exist in the registry.

Understanding CRI-O

CRI-O is an open-source container runtime specifically designed for Kubernetes. It provides a lightweight and efficient way to run containers by integrating with the Kubernetes Container Runtime Interface (CRI). CRI-O allows Kubernetes to use any Open Container Initiative (OCI) compliant runtime as the container runtime for running pods.

Symptom: 'Image Not Found' Error

When using CRI-O, you might encounter an error in the logs stating 'image not found'. This error typically occurs when CRI-O is unable to locate the specified container image in the registry.

Details About the 'Image Not Found' Issue

The 'image not found' error indicates that CRI-O attempted to pull an image that does not exist in the specified registry. This could be due to a typo in the image name or tag, or the image might not have been pushed to the registry.

For more information on CRI-O and its error handling, you can visit the official CRI-O documentation.

Steps to Fix the 'Image Not Found' Issue

Step 1: Verify Image Name and Tag

Ensure that the image name and tag are correctly specified in your Kubernetes deployment or pod specification. Check for any typos or incorrect tags.

image: myregistry.com/myimage:latest

Step 2: Check Image Availability in the Registry

Log in to your container registry and verify that the image exists. You can use the registry's web interface or CLI tools to list available images and tags.

For Docker Hub, you can use the following command to list tags:

docker search myregistry.com/myimage

Step 3: Pull the Image Manually

Try pulling the image manually using a tool like Docker to ensure it is accessible:

docker pull myregistry.com/myimage:latest

If the pull is successful, the issue might be with CRI-O's configuration or network access.

Step 4: Check CRI-O Configuration

Ensure that CRI-O is configured to access the correct registry. Check the /etc/crio/crio.conf file for registry settings:

[crio.image] registries = ["myregistry.com"]

For more details on configuring CRI-O, refer to the CRI-O Configuration Guide.

Conclusion

By following these steps, you should be able to resolve the 'image not found' error in CRI-O. Ensuring that the image name, tag, and registry settings are correct is crucial for successful container deployment. For further assistance, consider reaching out to the Kubernetes Slack community.

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