Basics of running a Docker container on Azure

Question

I'm following this tutorial:
How To Deploy Containers to Azure ACI using Docker CLI and Compose

and when I run the command:

docker --context myaci run -d --name web -p 80:80 nginx

I get the following error:

containerinstance.ContainerGroupsClient#CreateOrUpdate: Failure sending request: StatusCode=400 -- Original Error: Code="MoreImageRegistryCredentialsThanContainers" Message="More image registry credentials provided than containers in container group 'web'."

If I run the command without the --name web flag, a new container group seems to be generated with a random name, and I get the same error. How can I fix this?

Answer 1

Hello, @halpert3 !

Why am I running into a "MoreImageRegistryCredentialsThanContainers" error on Azure Container Instances (ACI)?
If you run the following on ACI, you'll get an error:

Command

docker --context myacicontext run -p 80:80 nginx  

Resulting error

containerinstance.ContainerGroupsClient#CreateOrUpdate: Failure sending request: StatusCode=400 -- Original Error: Code="MoreImageRegistryCredentialsThanContainers" Message="More image registry credentials provided than containers in container group 'mycontainergroup'."  

This has been reported by lonevvolf in GitHub issue 2150 and is caused by the Docker Hub repo not residing in the default search location (Azure Container Registry). Using the full URI where the image is hosted will resolve this issue:

docker --context myacicontext run -p 80:80 registry.hub.docker.com/library/nginx  

References and additional reading:

• Docker Compose CLI: Error running against ACI #2150
• Docker GitHub.io: add instructions for deploying DockerHub images #14932
• Docker blog: How To Deploy Containers to Azure ACI using Docker CLI and Compose
• Docker docs: Deploying Docker containers on Azure
• Microsoft Learn: Quickstart: Deploy a container instance in Azure using the Docker CLI