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Connecting to NSX-T Policy API using NSX-T Private IP in VMC

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As explained in my Getting started with NSX-T Policy API in VMware Cloud on AWS (VMC) article, there are two ways in which you can interact with the NSX-T Policy API in VMC. The initial method is with the NSX-T Reverse Proxy which designed for initial setup including Edge Firewall and connectivity configuration (VPN/Direct Connect). Once you have enabled remote access from your network to the SDDC, you can continue using the reverse proxy method or you can connect directly to the NSX-T Manager via its private IP Address.


So how do you actually connect to the NSX-T Manager using its private IP? To be honest, this was not something I had to do before as I really like the simplicity of the reverse proxy but since this came up today in one of our VMC Slack channels, I figured I take a closer look.

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Which NSX-T Policy APIs are used in the NSX-T UI in VMC?

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As the adoption of VMware Cloud on AWS (VMC) continues to accelerate, one of the very first UI interface that customers must interact with is the NSX-T UI, for enabling basic connectivity. By default the Edge Gateway has a Deny All Firewall Rule, so you will need to come to this screen to setup connectivity from your on-premises environment including a Direct Connect (DX) or Route/Policy-Based VPN. For some customers who have familiarize themselves with the NSX-T UI and its capabilities, usually the next order of business is how do I go about automating these various aspects from Day 0 setup all the way to Day N where I am migrating in or creating additional workloads.

A very common set of questions that I have been getting lately is which API do I need to look at to do X in the NSX-T UI in VMC?


Having spent some time with the NSX-T Policy API, I figure it would be useful to share the categories of NSX-T Policy API that maps back to what you see in the NSX-T UI in VMC. The list below is not exhaustive, but should it should point you in the right direction when needing to automate a particular operation.

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How to retrieve the NSX-T Overview Info (SDDC Public IP, Appliance & Infra Subnet, etc.) in VMC?

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I recently a question from one of our VMware Cloud on AWS (VMC) field folks who was looking to programmatically retrieve the SDDC Public IP Address which is shown under the NSX-T Networking & Security Overview page within the VMC Console as shown in the screenshot below. 


This actually had me stumped for a bit as I was not able to find anything mentioned in the NSX-T Policy API documentation. My last resort before pinging the NSX Engineers was to use one of my favorite browser tool, Chrome Developer Tools, which allows me to inspect all requests made to a specific web page and can also be helpful in figuring out which REST APIs the UI is using.

It turns out for this particular page, the information was not actually coming from the NSX-T Policy API but rather from another endpoint and specifically /cloud-service/api/v1/infra/sddc-user-config which I am guessing has to do with the fact that some of this information is really AWS specific information such as the Public IP Address for example. In any case, once I realized what the endpoint was and that I could still use the VMC NSX-T Reverse Proxy to retrieve the details, it was pretty straight forward.

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