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Swiss Army Identity Aware Proxy

Very fast Serverless OpenResty based proxy that can wrap upstream binaries with a login. Furthermore, we have examples of

  • Local development environment
  • Slack/Zapier intergration.
  • A Write Ahead Log
  • Google Secret Manager intergration

Read more on the OpenResty: a Swiss Army Proxy for Serverless; WAL, Slack, Zapier and Auth blog.

An earlier version is linked to in the Minimalist BeyondCorp style Identity Aware Proxy for Cloud Run blog that is just the login part.

OpenResty and Cloud Run

Build on top of OpenResty, hosted on Cloud Run (and excellent match)

Extensions Fast Response using a Write Ahead Log

If upstream is slow (e.g. scaling up), you can redirect to a WAL. Latency is the time to store the message. A different location plays back the WAL with retries so you can be sure the request is eventially handled.

Extensions Securing a Slack Intergration

Intergration with Slack Reads a secret from Google secrets manager and verifies the signature HMAC

Extensions Securing a Zapier Intergration

Zapier can be protected with an Oauth account

Local testing with docker-compose

Generate a local service account key in .secret

gcloud iam service-accounts keys create .secret/sa.json --iam-account=openresty@larkworthy-tester.iam.gserviceaccount.com

run this script to get a setup that reloads on CTRL + C

/bin/bash test/dev.sh

The use of bash to start the script gives it an easier name to find to kill

killall "bash"

Get prod tokens

https://openresty-flxotk3pnq-ew.a.run.app/login?token=true

Test WAL verification

curl -X POST -d "{}" http://localhost:8080/wal-playback/

Test token validation

curl http://localhost:8080/httptokeninfo?id_token=foo
curl http://localhost:8080/httptokeninfo?access_token=foo

Test slack

curl http://localhost:8080/slack/command