Report Greengrass Component External Facing IP Address

Question

Use-case: 
Automatically build AWS Security groups by reporting the external-facing IP address of an edge device running AWS Greengrass V2. Is there an AWS provided component that does this ?

I see that the IoT Device Defender Component posts some information regarding how many bytes over which ports. We are looking for a component that can report:
 - External facing IP
 - Bandwidth usage (or at least, bandwidth used by the Greengrass software)

Does such a public component exist, or would it have to be a custom-built component ?

Answer

IPDetector component might be of interest to you: https://docs.aws.amazon.com/greengrass/v2/developerguide/ip-detector-component.html

Answer

We also had a need to know the external-facing (i.e public) IP address.  We achieved it by just publishing it to the device's twin, where it's easily looked up.   Here's how we did it:

```
mosquitto_pub -h $GG_HOST --cert $GG_HOME/thingCert.crt --key $GG_HOME/privKey.key --cafile $GG_HOME/rootCA.pem -t '$aws/things/'$GG_THING'/shadow/update' -m "$jsonString"
```

The $jsonString needed to look like so:

```
{"state":{"reported":{"key1":"val1" ...  "IP": $IP }}}'
```

with $IP looked up easily with a call to:

```
curl -4 ifconfig.co
```
All bash, and worked for us.  Hope this helps.

Report Greengrass Component External Facing IP Address

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