blog: post about secondary ovn-k localnet networks

[maiqueb]

This type of networks allows connectivity to the physical network underlay.

What this PR does / why we need it: This PR shows how to create OVN-K secondary networks to interconnect VMs on an SDN network with access to the physical network underlay.

Does this PR fix any issue? _(optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged)_:

Fixes #

Special notes for your reviewer:

[kubevirt-bot]

Skipping CI for Draft Pull Request. If you want CI signal for your change, please convert it to an actual PR. You can still manually trigger a test run with /test all

[maiqueb]

/cc @phoracek

[maiqueb]

/cc @jcaamano

[kubevirt-bot]

@maiqueb: GitHub didn't allow me to request PR reviews from the following users: jcaamano.

Note that only kubevirt members and repo collaborators can review this PR, and authors cannot review their own PRs.

In response to [this](https://github.com/kubevirt/kubevirt.github.io/pull/907#issuecomment-1568735911): >/cc @jcaamano Instructions for interacting with me using PR comments are available [here](https://git.k8s.io/community/contributors/guide/pull-requests.md). If you have questions or suggestions related to my behavior, please file an issue against the [kubernetes/test-infra](https://github.com/kubernetes/test-infra/issues/new?title=Prow%20issue:) repository.

[phoracek]

/lgtm /approve /hold

Holding for @cwilkers to get a chance to +1 or -1 this too

[kubevirt-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: phoracek

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[cwilkers]

I did a quick skim, the examples look good to me now. Thanks!

/release-hold /lgtm

[maiqueb]

@cwilkers did you mean to /hold cancel ?

(I'm unaware if /release-hold is supposed to work, but looks like it didn't ...)

[maiqueb]

/hold cancel

going ahead with it.

Thanks all.

[cwilkers]

@maiqueb Oops, I looked up the commands and mis-remembered remove-hold. In completely random news, there is also a /honk command to add a goose to a PR. Do with that knowledge what you will.