Custom V-Net addition to docs

[sayantani11]

/kind documentation

Describe the solution you'd like
[A clear and concise description of what you want to happen.]
Adding a Custom Virtual Network documentation GCP

Anything else you would like to add:
[Miscellaneous information that will assist in solving the issue.]
Refer to https://github.com/kubernetes-sigs/cluster-api-provider-azure/blob/main/docs/book/src/topics/custom-vnet.md
for better understanding
Also:
https://cloud.google.com/vpc/docs/vpc
https://cloud.google.com/vpc/docs/using-vpc

[sayantani11]

/good-first-issue

[k8s-ci-robot]

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[daemon1024]

/assign

[sayantani11]

@daemon1024 Updates?

[sayantani11]

@daemon1024 Any updates? Stuck somewhere?

[daemon1024]

@sayantani11 Apologies for the delay and missing providing updates here.

So I went through the shared resources and the spec provided here https://github.com/kubernetes-sigs/cluster-api-provider-gcp/blob/main/config/crd/bases/infrastructure.cluster.x-k8s.io_gcpclusters.yaml

I came with a rough configuration...

---

Existing subnet

```yaml
apiVersion: infrastructure.cluster.x-k8s.io/v1Alpha4
kind: GCPCluster
spec:
    network:
        autoCreateSubnetworks: false
        name: my-vpc
        subnets:
            - name: my-subnet
            cidrBlock: 10.0.32.0/20
    project: xyz
    region: us-easta
```

New subnet, provide cidrblock

```yaml
apiVersion: infrastructure.cluster.x-k8s.io/v1Alpha4
kind: GCPCluster
spec:
    network:
        autoCreateSubnetworks: false
        name: my-vpc
        subnets:
            - name: my-subnet
            cidrBlock: 10.0.32.0/20
            region: ? # do we need it when we have region specified in spec?
    project: xyz
    region: us-easta
```

Auto cidr block ranges - https://cloud.google.com/vpc/docs/vpc#ip-ranges

---

But I am not sure how do I test it out! I don't have GCP instance 😓

[sayantani11]

@daemon1024 You can try creating a gcp account and I guess you get a 250$ credit in the start that you can use or you can try using qwicklabs I believe

[sayantani11]

@daemon1024 And yes I think we need to specify region in the subnet as well

[sayantani11]

@daemon1024 or you can try reaching me on slack... I will try testing it... But will need some time with that😅

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/lifecycle stale

[AvineshTripathi]

Hey @sayantani11 is this still up for grab, maybe I can give a try

[sayantani11]

Yes!
/assign @AvineshTripathi

[sayantani11]

/remove-lifecycle stale

[AvineshTripathi]

@sayantani11 I did go through the resources but being new to kubernetes I need some time and more resource to get a better idea so I was wondering if you can help me with resources with more basics to clear my fundamentals

[k8s-triage-robot]

The Kubernetes project currently lacks enough contributors to adequately respond to all issues and PRs.

This bot triages issues and PRs according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
• After 30d of inactivity since lifecycle/rotten was applied, the issue is closed

You can:

• Mark this issue or PR as fresh with /remove-lifecycle stale
• Mark this issue or PR as rotten with /lifecycle rotten
• Close this issue or PR with /close
• Offer to help out with Issue Triage

Please send feedback to sig-contributor-experience at kubernetes/community.

/lifecycle stale

[sayantani11]

/lifecycle frozen
/help

[sayantani11]

/remove-lifecycle stale

[sayantani11]

/lifecycle frozen