This is extremely similar to an issue that was already closed due to not enough information #15867.

This yellow warning can appear for a number of reasons, and some of them are completely unrelated to the agent not being able to connect, but instead to do with the pod that the agent is connecting to being difficult to start up for a variety of issues.

In the example I have screenshotted, the agent cannot connect to this pod (this is a k8s deployment) for 2 reasons:

1. There are not enough nodes with enough room to support the pod, so before it can deploy it needs to create a new node, and then deploy the node on that pod (this can sometimes take a minute or 2)
2. Once the pod is deployed, if the image it is using is not cached (Which will always be true if the node was just created), the pod cannot start until the image has been pulled from the relevant registry. In this case, the image is just under 50GB, so it takes a fair amount of time.

The problem with this is that there is absolutely no visibility to this in the Coder UI, and the only way to know that this is happening is to have direct access to the cluster, and look at the events being raised against the pod.

What would be ideal is to have a way to configure the expected startup of a workspace, based on internal knowledge about how long it could potentially take. Or - show the users exactly why the workspace is taking a while. Even just bubbling up the events on the pod the agent is trying to connect to would be an improvement.