acr says "Please verify if docker daemon is running properly." despite docker daemon running

[p-]

Problem
After performing a login to the container registry: az acr login --name <acrName>
acr says "Please verify if docker daemon is running properly." despite docker daemon running.

Suspected cause
The root cause of this issue seems to be that acr/custom.py tries to run docker ps which needs elevated rights on some systems. So the command returns a non-zero error and throws an exception.

So a solution for the cli might be to provide a better warning.

A workaround/solution for people encountering this issue is to run the command with sudo:
sudo az acr login --name <acrName>

---

Environment summary

Install Method: apt-get
azure-cli (2.0.22)
acr (2.0.16)

[udelblue]

This may help #4407

[udelblue]

or user this
docker login myregistry.azurecr.io -u xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx -p myPassword
will allow you to login from docker not using the az cli
more info here
https://docs.microsoft.com/en-us/azure/container-registry/container-registry-get-started-docker-cli

[yugangw-msft]

Dongjiang You (@djyou), could you please comment?

[djyou]

The root cause here is that docker daemon always runs as the root user. The validation using docker ps is correct since docker login also needs elevated rights (so as docker pull, docker push, etc.).

I will fix the CLI warning to suggest users add a sudo in such cases.

Also if you don’t want to use sudo, here are the steps https://docs.docker.com/engine/installation/linux/linux-postinstall/

[gimler]

Please reopen. It seems that the docker image doesn't provide docker. Also it is based on alpine so no sudo available.

[gimler]

got it to work with

docker run --rm -it  -v /var/run/docker.sock:/var/run/docker.sock  microsoft/azure-cli:2.0.25

then

apk --no-cache add docker

now it works for me

[djyou]

Gordon Franke (@gimler) It's by design that docker wasn't installed in the CLI container, please see #3747 (review)
What you've suggested are exactly the steps in acr doc.