scaleway: IPAM integration

[Mia-Cross]

Since the release of IPAM at Scaleway, some services (like load-balancers) no longer work with the IP provided by the instance API.
This PR makes all kOps components use the IPs from IPAM instead.

A PR has also been made on the etcd-manager and works together with this one.

This is the first step for the integration of private networks, which is coming soon.

[k8s-ci-robot]

Hi @Mia-Cross. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

I understand the commands that are listed here.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[hakman]

/ok-to-test

[Mia-Cross]

As it is in this PR, the code works for clusters with DNS and with no DNS, but not for those with gossip DNS because the initialization of the secondary gossip fails. This is due to the fact that the memberlistmesh package expects only private IPs, which are not provided by IPAM, whereas the legacy instance private IPs don't work anymore.

This problem will be fixed in the next PR implementing private networks since it will allow instances to have a private IP provided by IPAM.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: hakman

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [hakman]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[hakman]

/test all

[hakman]

/test pull-kops-kubernetes-e2e-ubuntu-gce-build