Integrate github app workflow with lambda.

A new github app "iocost-issue-creater" is created and installed
with iocost-benchmark organization which has a permission to
file issue on iocost-benachmarks repository.

When a user uploads the benchmark result with lambda url, lambda
saves the benchmark result in aws s3 bucket and create a issue
in iocost-benchmarks projects.

Signed-off-by: Santosh Mahto <santosh.mahto@collabora.com>

Author: santoshmahto7

Cargo.lock

@@ -24,6 +24,7 @@ aws-sdk-s3 = { version = "0.28.0", optional = true, features = ["rustls", "rt-to
 aws-sdk-ssm = { version = "0.28.0", optional = true, features = ["rustls", "rt-tokio"], default-features = false  }
 aws_lambda_events = "0.10.0"
 
+jsonwebtoken = "8.3.0"
 lambda_runtime = { version = "0.8.1", optional = true  }
 md5 = { version = "0.7", optional = true  }
 octocrab = { version = "0.28.0", optional = true, features = ["rustls"], default-features = false }

resctl-bench/Cargo.toml

@@ -87,6 +87,32 @@ We still need to configure our S3 bucket to allow public read only access, so th
 }
 ```
 
+
+We also store the credential parameters required to file a github issue in AWS Systems Manager -> parameter store.
+We use github app `iocost-issue-creater` to file a github issue, thus it's credentials information `App Id` and 
+`Private Key` are stored in parameter store.  
+```
+{
+    /iocost-bot/appid : "xxxx"
+    /iocost-bot/privatekey : "PEM format key"
+}
+```
+
+AWS lambda flow
+===============
+1. User generates the benchmark result on their device.  
+`$ resctl-bench -r "$RESULT_JSON" --logfile=$LOG_FILE run iocost-tun`
+2. User uploads the result to aws lambda function url as:  
+`resctl-bench -r <RESULT_JSON>   upload --upload-url  <AWS lambda function URL>`  
+e.g  
+`$resctl-bench --result resctl-bench-result_2022_07_01-00_26_40.json.gz upload --upload-url https://ygvr6jnjckwamfao5xztg6idiu0ukjeb.lambda-url.eu-west-1.on.aws`
+
+3. Lamda is tiggered automatically in AWS.
+     - It saves the benchmark result to S3 bucket.
+     - Then create a issue in iocost-benchmark/iocost-benchmarks project using `iocost-issue-creater` github app.
+     - Issue contain a link to benchmark result stored in s3 bucket.
+
+
 Deploying
 =========
 

resctl-bench/doc/lambda.md

@@ -5,6 +5,9 @@ use aws_lambda_events::event::lambda_function_urls::LambdaFunctionUrlRequest;
 use aws_sdk_s3::error::SdkError;
 use lambda_runtime::{service_fn, LambdaEvent};
 use log::error;
+use octocrab::models::InstallationToken;
+use octocrab::params::apps::CreateInstallationAccessToken;
+use octocrab::Octocrab;
 use std::io::{Cursor, Read, Write};
 use std::os::unix::process::CommandExt;
 use std::path::Path;
@@ -145,10 +148,10 @@ impl LambdaHelper {
     }
 
     pub async fn create_github_issue(&self, title: &str, body: &str) -> Result<String> {
-        let token = self
+        let app_id = self
             .ssm
             .get_parameter()
-            .set_name(Some("/iocost-bot/token".to_string()))
+            .set_name(Some("/iocost-bot/appid".to_string()))
             .send()
             .await
             .expect("Failed to query parameter")
@@ -157,8 +160,47 @@ impl LambdaHelper {
             .value
             .expect("Parameter value is None");
 
+        let pem = self
+            .ssm
+            .get_parameter()
+            .set_name(Some("/iocost-bot/privatekey".to_string()))
+            .send()
+            .await
+            .expect("Failed to query parameter")
+            .parameter
+            .expect("Could not find parameter")
+            .value
+            .expect("Parameter value is None");
+
+        let token = octocrab::auth::create_jwt(
+            app_id.parse::<u64>().unwrap().into(),
+            &jsonwebtoken::EncodingKey::from_rsa_pem(pem.as_bytes()).unwrap(),
+        )
+        .unwrap();
+
+        let octocrab = Octocrab::builder().personal_token(token).build()?;
+
+        let installations = octocrab
+            .apps()
+            .installations()
+            .send()
+            .await
+            .unwrap()
+            .take_items();
+
+        let mut create_access_token = CreateInstallationAccessToken::default();
+        create_access_token.repositories = vec!["iocost-benchmarks".to_string()];
+
+        let access: InstallationToken = octocrab
+            .post(
+                installations[0].access_tokens_url.as_ref().unwrap(),
+                Some(&create_access_token),
+            )
+            .await
+            .unwrap();
+
         let issue = octocrab::OctocrabBuilder::new()
-            .personal_token(token)
+            .personal_token(access.token)
             .build()?
             .issues("iocost-benchmark", "iocost-benchmarks")
             .create(title)