chore(aws): start knowledge about route 53

knowledge base/cloud computing/aws/route53.md

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+# Route 53
+
+AWS DNS service offering.
+
+1. [TL;DR](#tldr)
+1. [Split-view](#split-view)
+1. [Further readings](#further-readings)
+   1. [Sources](#sources)
+
+## TL;DR
+
+<!-- Uncomment if used
+<details>
+  <summary>Setup</summary>
+
+```sh
+```
+
+</details>
+-->
+
+<details>
+  <summary>Usage</summary>
+
+```sh
+# List hosted zones.
+aws route53 list-hosted-zones
+```
+
+</details>
+
+<!-- Uncomment if used
+<details>
+  <summary>Real world use cases</summary>
+
+```sh
+```
+
+</details>
+-->
+
+## Split-view
+
+A.K.A _split-horizon_ DNS.
+
+Allows to use the same domain name for both **internal** _and_ **external** uses.
+
+Procedure:
+
+1. Create public **and** private hosted zones with the same name.<br/>
+   Split-view DNS will still work if using an external DNS service for the public hosted zone.
+1. Associate one or more VPCs with the private hosted zone.<br/>
+   Route 53 Resolver will use the private hosted zone to route DNS queries in the associated VPCs.
+1. Create records in each hosted zone.
+
+   Records in the _public_ hosted zone will control how **internet** traffic is routed.<br/>
+   Records in the _private_ hosted zone will control how traffic is routed **inside the associated VPCs**.
+
+1. Use Route 53 Resolver to perform name resolution of **both** the associated VPC **and** on-premises workloads.
+
+## Further readings
+
+### Sources
+
+- [What is Amazon Route 53?]
+- [Split-view DNS]
+
+<!--
+  Reference
+  ═╬═Time══
+  -->
+
+<!-- In-article sections -->
+<!-- Knowledge base -->
+<!-- Files -->
+<!-- Upstream -->
+[split-view dns]: https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/hosted-zone-private-considerations.html
+[what is amazon route 53?]: https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/Welcome.html
+
+<!-- Others -->