VPC Lambda Function Cannot Make HTTPS Calls

zprobst · February 24, 2019, 4:57pm

I have a lambda function written in python. Through some testing, I am able to make http calls via the request library but not HTTPS calls. I need this because this function needs to call a rest-api. Does anyone have anything similar that has happened in the past that may be the cause of this? Below is the beginning of the error trace from requests. I see that it has something to do with the ssl library but searching in this area has not provided any useful results.

File “/var/task/OpenSSL/SSL.py”, line 309, in wrapper
_lib.X509_up_ref(x509)
AttributeError: module ‘lib’ has no attribute ‘X509_up_ref’

ericmaicon · February 27, 2019, 12:40pm

maybe you have your lambdas inside a VPC?! If so, you need to create a NAT and set the route table to get internet access in your lambda:

gist.github.com

https://gist.github.com/reggi/dc5f2620b7b4f515e68e46255ac042a7

how-to-setup-lambda-to-talk-to-internet-and-vpc.md

# How to setup AWS lambda function to talk to the internet and VPC

I'm going to walk you through the steps for setting up a AWS Lambda to talk to the internet and a VPC. Let's dive in.

So it might be really unintuitive at first but lambda functions have three states.

1. No VPC, where it can talk openly to the web, but can't talk to any of your AWS services.
2. VPC, the default setting where the lambda function can talk to your AWS services but can't talk to the web.
3. VPC with NAT, The best of both worlds, AWS services and web.

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VPC Lambda Function Cannot Make HTTPS Calls

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