WIP - Re-enable Ubuntu build in CI

[tomkerkhove]

Re-enable Ubuntu build in CI

Follow-up of #283

[k8s-ci-robot]

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[tomkerkhove]

/assign @brendandburns

[tomkerkhove]

Looks like the build is hanging because of minikube which is the same issue from original CI.
Figured this was going to be fixed with the revving but guess not.

An additional improvement would be not to wait for the cluster if Minikube has crashed:
https://github.com/kubernetes-client/csharp/blob/master/install-linux.sh#L29

[tomkerkhove]

I've added logs for tracing what version for kubectl & minikube is being installed, but they don't always show up somehow.

That said, I've changed minikube commands to use --logtostderr so that we see what is wrong.

Turns out we have a couple of issues:

• unsupported docker version: 3.0.4
• Error reading config file at /home/vsts/.minikube/config/config.json: open /home/vsts/.minikube/config/config.json: no such file or directory - Although this can be side-effect, but not sure

[qmfrederik]

@tomkerkhove That's odd, perhaps you can add a docker -v to see what version of Docker is installed. Kubernetes is a bit picky with which version of Docker it supports - the supported versions now are 1.13.1, 17.03, 17.06, 17.09, 18.06, 18.09.

Azure DevOps regularly upgrades the software installed on the agents, which can cause sudden build breaks like this. (Travis is much more conservative in that respect)

[tomkerkhove]

I'll add the docker version to the output and make sure we install a specific version so that we run the correct version if we can.

Looks like they've changed it recently: microsoft/azure-pipelines-image-generation@8e6db92#diff-f87405c9dd43f633a04dd078666d61af

[qmfrederik]

Yeah, so that means we'll probably need some packaging voodoo to uninstall the version of Docker that comes pre-installed, and replace it with a version which is supported by Kubernetes.

[tomkerkhove]

Not really, they actually have it out of the box - https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/tool/docker-installer?view=azure-devops

Will update the PR in a few hours

[tomkerkhove]

I'll abandon this PR for now and circle back once I get this working.

Don't want to burn too much build time/spam people

[tomkerkhove]

Not really, they actually have it out of the box - https://docs.microsoft.com/en-us/azure/devops/pipelines/tasks/tool/docker-installer?view=azure-devops

Nevermind, this is just the CLI