Karmada Highly Available Topology Overview

[Affan-7]

What type of PR is this?

/kind documentation

What this PR does / why we need it:
This PR introduces an overview to HA architecture of karmada, so users get aware about Karmada HA.

Which issue(s) this PR fixes:
Related to: #418
Task 1 out of 5

Special notes for your reviewer:
@RainbowMango can you please review the architecture in this draft.
Feel free to add some suggestions. I will move forward when everything looks good to you.

Newly added page: https://deploy-preview-443--karmada.netlify.app/docs/next/installation/ha-installation/

[Affan-7]

/cc @RainbowMango

[RainbowMango]

/assign

[RainbowMango]

@Affan-7 , Thank you very much for doing this. That's awesome.

I think Karmada's HA Topology is quite similar to Kubernetes. So can we describe it as this document?

• Stacked etcd topology
• External etcd topology

[RainbowMango]

Looks awesome, just some nits, otherwise LGTM.

[RainbowMango]

Could you please squash your commits? Then things will be all set, thanks, well done.

By the way, which tools did you use to draw the excellent picture? Please add the source file if possible,.

[Affan-7]

Thank you for collaboration @RainbowMango, I appreciate your contributions to the open-source.

I use www.canva.com for creating diagrams and graphics. I discovered this tool while I was creating some graphics for my tech blog. It's very handy and easy to use. Here are the source files.

https://www.canva.com/design/DAFrH6RfJp4/ISaw242zbJxnH5HOUElF2g/edit?utm_content=DAFrH6RfJp4&utm_campaign=designshare&utm_medium=link2&utm_source=sharebutton

https://www.canva.com/design/DAFrH9x9WiI/JURdm-FBF0P8hlV-7vSzCw/edit?utm_content=DAFrH9x9WiI&utm_campaign=designshare&utm_medium=link2&utm_source=sharebutton

[RainbowMango]

/lgtm
/approve

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