Adding slack webhook lambda

Cargo.toml

@@ -5,4 +5,5 @@ members = [
     "delete-unnused-aws-loggroups",
     "export-loggroups-to-s3",
     "rotate-google-service-user",
+    "slack-webhook-to-eventbridge",
 ]

slack-webhook-to-eventbridge/Cargo.toml

@@ -0,0 +1,32 @@
+[package]
+name = "slack-webhook-to-eventbridge"
+version = "1.0.0"
+authors = ["Marc Mettke <[email protected]>"]
+edition = "2021"
+description = "WebAPI Lambda compatible with Slack Webhook. Expects a Slack event and sends it to EventBridge"
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/itmettkeDE/lambdas"
+readme = "./README.md"
+keywords = ["lambda", "slack", "webhook", "eventbridge"]
+categories = ["command-line-utilities"]
+
+[features]
+test = ["lambda-runtime-types/test"]
+
+[dependencies]
+anyhow = "1"
+async-trait = "0.1"
+aws-config = { version = "0.9", features = ["rustls"] }
+aws-sdk-eventbridge = { version = "0.9", features = ["rustls"] }
+aws-sdk-secretsmanager = { version = "0.9", features = ["rustls"] }
+hex = "0.4"
+hmac = "0.12"
+http = "0.2"
+http-serde = "1"
+lambda-runtime-types = { version = "0.6", default-features = false, features = ["rotate_rusoto"] }
+log = "0.4"
+query_map = { version = "0.4", features = ["serde"] }
+sha2 = "0.10"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+simple_logger = "2"

slack-webhook-to-eventbridge/README.md

@@ -0,0 +1,29 @@
+# slack-webhook-to-eventbridge
+
+This Lambda is compatible with AWS WebAPI. Its supposed to be connected to the Slack Event Subscription and will send incoming Slack Events to EventBridge.
+
+## Setup
+
+* Create a lambda with the binary from this repository using runtime `provided.al2`
+and anything as handler. (More Infos about paramters below).
+* Add permissions for `secretsmanager:GetSecretValue` and `events:PutEvents` to the
+lambdas iam role
+
+## Parameters
+
+The lambda function has a few parameters. You can define them via
+environment variables.
+
+### Environment Variables
+```sh
+# AWS Secretsmanager Secret which contains the signing_secret in the following format:
+# `{"signing_secret": ""}`
+SLACK_SECRET=""
+# Name of the AWS Eventbridge this lambda is supposed to send events to
+EVENTBRIDGE_BUS_NAME=""
+# Optional, skip if not required. off | error | warn | info (default) | debug | trace
+# Defines the log level
+LOG_LEVEL=""
+```
+
+License: MIT OR Apache-2.0