Aws iam (#25)

* update register factory
* create path just once
* add iam support for AWS; no tests yet
* updated code and tests
* add missing test file + integration test
* update e2e test
* test invoking the timer callback
* add stats
* PR Comments

api/envoy/config/filter/http/aws_lambda/v2/aws_lambda.proto

@@ -16,7 +16,7 @@ import "validate/validate.proto";
 message AWSLambdaPerRoute {
   // The name of the function
   string name = 1 [ (validate.rules).string.min_bytes = 1 ];
-  // The qualifier of the function (defualts to $LATEST if not specified)
+  // The qualifier of the function (defaults to $LATEST if not specified)
   string qualifier = 2;
 
   // Invocation type - async or regular.
@@ -33,7 +33,18 @@ message AWSLambdaProtocolExtension {
   // The region for this cluster
   string region = 2 [ (validate.rules).string.min_bytes = 1 ];
   // The access_key for AWS this cluster
-  string access_key = 3 [ (validate.rules).string.min_bytes = 1 ];
+  string access_key = 3;
   // The secret_key for AWS this cluster
-  string secret_key = 4 [ (validate.rules).string.min_bytes = 1 ];
+  string secret_key = 4;
 }
+
+message AWSLambdaConfig {
+  // Use AWS default credentials chain to get credentials.
+  // This will search environment variables, ECS metadata and instance metadata
+  // to get the credentials. credentials will be rotated automatically.
+  //
+  // If credentials are provided on the cluster (using the
+  // AWSLambdaProtocolExtension), it will override these credentials. This
+  // defaults to false, but may change in the future to true.
+  google.protobuf.BoolValue use_default_credentials = 1;
+}

e2e/extensions/filters/http/aws_lambda/BUILD

@@ -2,10 +2,8 @@ licenses(["notice"])  # Apache 2
 
 load(
     "@envoy//bazel:envoy_build_system.bzl",
-    "envoy_cc_binary",
-    "envoy_cc_library",
-    "envoy_cc_test",
     "envoy_package",
+    "envoy_sh_test",
 )
 
 envoy_package()
@@ -18,5 +16,6 @@ sh_test(
     data = [
         "//:envoy",
         "//e2e/extensions/filters/http/aws_lambda:create_config.sh",
+        "//e2e/extensions/filters/http/aws_lambda:create_config_env.sh",
     ],
 )

e2e/extensions/filters/http/aws_lambda/create_config_env.sh

@@ -0,0 +1,107 @@
+#!/bin/bash
+#
+
+set -e
+
+# # create function if doesnt exist
+# aws lambda create-function --function-name captialize --runtime nodejs 
+# invoke
+# aws lambda invoke --function-name uppercase --payload '"abc"' /dev/stdout
+
+
+# prepare envoy config file.
+
+cat > envoy_env.yaml << EOF
+admin:
+  access_log_path: /dev/stdout
+  address:
+    socket_address:
+      address: 127.0.0.1
+      port_value: 19001
+static_resources:
+  listeners:
+  - name: listener_0
+    address:
+      socket_address: { address: 127.0.0.1, port_value: 10001 }
+    filter_chains:
+    - filters:
+      - name: envoy.http_connection_manager
+        config:
+          stat_prefix: http
+          codec_type: AUTO
+          route_config:
+            name: local_route
+            virtual_hosts:
+            - name: local_service
+              domains: ["*"]
+              routes:
+              - match:
+                  prefix: /echo
+                route:
+                  cluster: postman-echo
+                  prefix_rewrite: /post
+              - match:
+                  prefix: /lambda
+                route:
+                  cluster: aws-us-east-1-lambda
+                per_filter_config:
+                  io.solo.aws_lambda:
+                    name: uppercase
+                    qualifier: "1"
+              - match:
+                  prefix: /latestlambda
+                route:
+                  cluster: aws-us-east-1-lambda
+                per_filter_config:
+                  io.solo.aws_lambda:
+                    name: uppercase
+                    qualifier: "%24LATEST"
+              - match:
+                  prefix: /contact-empty-default
+                route:
+                  cluster: aws-us-east-1-lambda
+                per_filter_config:
+                  io.solo.aws_lambda:
+                    name: uppercase
+                    qualifier: "1"
+                    empty_body_override: "\"default-body\""
+              - match:
+                  prefix: /contact
+                route:
+                  cluster: aws-us-east-1-lambda
+                per_filter_config:
+                  io.solo.aws_lambda:
+                    name: contact-form
+                    qualifier: "3"
+          http_filters:
+          - name: io.solo.aws_lambda
+            config:
+              use_default_credentials: true
+          - name: envoy.router
+  clusters:
+  - connect_timeout: 5.000s
+    hosts:
+    - socket_address:
+        address: postman-echo.com
+        port_value: 443
+    name: postman-echo
+    type: LOGICAL_DNS
+    tls_context: {}
+  - connect_timeout: 5.000s
+    hosts:
+    - socket_address:
+        address: lambda.us-east-1.amazonaws.com
+        port_value: 443
+    name: aws-us-east-1-lambda
+    type: LOGICAL_DNS
+    dns_lookup_family: V4_ONLY
+    tls_context: {}
+    extension_protocol_options:
+      io.solo.aws_lambda:
+        host: lambda.us-east-1.amazonaws.com
+        region: us-east-1
+EOF
+
+
+export AWS_ACCESS_KEY_ID=$(grep aws_access_key_id   ~/.aws/credentials | head -1 | cut -d= -f2 |tr -d '[:space:]')
+export AWS_SECRET_ACCESS_KEY=$(grep aws_secret_access_key  ~/.aws/credentials | head -1 | cut -d= -f2 |tr -d '[:space:]')

e2e/extensions/filters/http/aws_lambda/e2e2e_test.sh

@@ -12,7 +12,7 @@ set -e
 
 ENVOY=${ENVOY:-envoy}
 
-$ENVOY -c ./envoy.yaml --log-level debug & 
+$ENVOY --disable-hot-restart -c ./envoy.yaml --log-level debug & 
 sleep 5
 
 
@@ -27,4 +27,20 @@ curl localhost:10000/contact |grep '<form method='
 # Test AWS Lambda using GET method with empty body that turns into non empty.
 curl localhost:10000/contact-empty-default |grep 'DEFAULT-BODY'
 
+curl localhost:19000/quitquitquit -XPOST
+
+
+####################### part 2 with env
+
+# Sanity with env:
+echo
+echo testing with env credentials
+echo
+
+. ./e2e/extensions/filters/http/aws_lambda/create_config_env.sh
+$ENVOY --disable-hot-restart -c ./envoy_env.yaml --log-level debug & 
+sleep 5
+
+curl localhost:10001/lambda --data '"abc"' --request POST -H"content-type: application/json"|grep ABC
+
 echo PASS

source/extensions/filters/http/aws_lambda/BUILD

@@ -64,6 +64,9 @@ envoy_cc_library(
         "//source/common/http:solo_filter_utility_lib",
         "//source/extensions/filters/http:solo_well_known_names",
         "@envoy//source/common/http:utility_lib",
+        "@envoy//source/extensions/filters/http/common/aws:credentials_provider_impl_lib",
+        "@envoy//source/extensions/filters/http/common/aws:credentials_provider_interface",
+        "@envoy//source/extensions/filters/http/common/aws:utility_lib",
     ],
 )
 
@@ -75,6 +78,6 @@ envoy_cc_library(
     deps = [
         ":aws_lambda_filter_lib",
         "@envoy//include/envoy/registry",
-        "@envoy//source/extensions/filters/http/common:empty_http_filter_config_lib",
+        "@envoy//source/extensions/filters/http/common:factory_base_lib",
     ],
 )

source/extensions/filters/http/aws_lambda/aws_authenticator.cc

@@ -176,7 +176,7 @@ std::string AwsAuthenticator::computeSignature(
     const std::string &region, const std::string &credentials_scope_date,
     const std::string &credential_scope, const std::string &request_date_time,
     const std::string &hashed_canonical_request) {
-  static std::string aws_request = "aws4_request";
+  static const std::string aws_request = "aws4_request";
 
   HMACSha256 sighmac;
   unsigned int out_len = sighmac.length();

source/extensions/filters/http/aws_lambda/aws_lambda_filter.cc

@@ -23,10 +23,17 @@ namespace Extensions {
 namespace HttpFilters {
 namespace AwsLambda {
 
+namespace {
 struct RcDetailsValues {
   const std::string FunctionNotFound = "aws_lambda_function_not_found";
+  const std::string FunctionNotFoundBody =
+      "no function present for AWS upstream";
+  const std::string CredentialsNotFound = "aws_lambda_credentials_not_found";
+  const std::string CredentialsNotFoundBody =
+      "no credentials present for AWS upstream";
 };
 typedef ConstSingleton<RcDetailsValues> RcDetails;
+} // namespace
 
 class AWSLambdaHeaderValues {
 public:
@@ -47,33 +54,53 @@ const HeaderList AWSLambdaFilter::HeadersToSign =
          Http::Headers::get().ContentType});
 
 AWSLambdaFilter::AWSLambdaFilter(Upstream::ClusterManager &cluster_manager,
-                                 TimeSource &time_source)
-    : aws_authenticator_(time_source), cluster_manager_(cluster_manager) {}
+                                 TimeSource &time_source,
+                                 AWSLambdaConfigConstSharedPtr filter_config)
+    : aws_authenticator_(time_source), cluster_manager_(cluster_manager),
+      filter_config_(filter_config) {}
 
 AWSLambdaFilter::~AWSLambdaFilter() {}
 
-std::string AWSLambdaFilter::functionUrlPath(const std::string &name,
-                                             const std::string &qualifier) {
-
-  std::stringstream val;
-  val << "/2015-03-31/functions/" << name << "/invocations";
-  if (!qualifier.empty()) {
-    val << "?Qualifier=" << qualifier;
-  }
-  return val.str();
-}
-
 Http::FilterHeadersStatus
 AWSLambdaFilter::decodeHeaders(Http::HeaderMap &headers, bool end_stream) {
 
   protocol_options_ = Http::SoloFilterUtility::resolveProtocolOptions<
       const AWSLambdaProtocolExtensionConfig>(
       SoloHttpFilterNames::get().AwsLambda, decoder_callbacks_,
       cluster_manager_);
+
   if (!protocol_options_) {
     return Http::FilterHeadersStatus::Continue;
   }
 
+  const std::string *access_key{};
+  const std::string *secret_key{};
+  if (protocol_options_->accessKey().has_value() &&
+      protocol_options_->secretKey().has_value()) {
+    access_key = &protocol_options_->accessKey().value();
+    secret_key = &protocol_options_->secretKey().value();
+  } else if (filter_config_) {
+    credentials_ = filter_config_->getCredentials();
+    if (credentials_) {
+      const absl::optional<std::string> &maybeAccessKeyId =
+          credentials_->accessKeyId();
+      const absl::optional<std::string> &maybeSecretAccessKey =
+          credentials_->secretAccessKey();
+      if (maybeAccessKeyId.has_value() && maybeSecretAccessKey.has_value()) {
+        access_key = &maybeAccessKeyId.value();
+        secret_key = &maybeSecretAccessKey.value();
+      }
+    }
+  }
+
+  if ((access_key == nullptr) || (secret_key == nullptr)) {
+    decoder_callbacks_->sendLocalReply(Http::Code::InternalServerError,
+                                       RcDetails::get().CredentialsNotFoundBody,
+                                       nullptr, absl::nullopt,
+                                       RcDetails::get().CredentialsNotFound);
+    return Http::FilterHeadersStatus::StopIteration;
+  }
+
   route_ = decoder_callbacks_->route();
   // great! this is an aws cluster. get the function information:
   function_on_route_ =
@@ -82,20 +109,19 @@ AWSLambdaFilter::decodeHeaders(Http::HeaderMap &headers, bool end_stream) {
 
   if (!function_on_route_) {
     decoder_callbacks_->sendLocalReply(
-        Http::Code::NotFound, "no function present for AWS upstream", nullptr,
-        absl::nullopt, RcDetails::get().FunctionNotFound);
+        Http::Code::InternalServerError, RcDetails::get().FunctionNotFoundBody,
+        nullptr, absl::nullopt, RcDetails::get().FunctionNotFound);
     return Http::FilterHeadersStatus::StopIteration;
   }
 
-  aws_authenticator_.init(&protocol_options_->accessKey(),
-                          &protocol_options_->secretKey());
+  aws_authenticator_.init(access_key, secret_key);
   request_headers_ = &headers;
 
   request_headers_->insertMethod().value().setReference(
       Http::Headers::get().MethodValues.Post);
 
-  request_headers_->insertPath().value(functionUrlPath(
-      function_on_route_->name(), function_on_route_->qualifier()));
+  request_headers_->insertPath().value().setReference(
+      function_on_route_->path());
 
   if (end_stream) {
     lambdafy();

source/extensions/filters/http/aws_lambda/aws_lambda_filter.h

@@ -23,7 +23,8 @@ namespace AwsLambda {
 class AWSLambdaFilter : public Http::StreamDecoderFilter {
 public:
   AWSLambdaFilter(Upstream::ClusterManager &cluster_manager,
-                  TimeSource &time_source);
+                  TimeSource &time_source,
+                  AWSLambdaConfigConstSharedPtr filter_config);
   ~AWSLambdaFilter();
 
   // Http::StreamFilterBase
@@ -44,8 +45,6 @@ class AWSLambdaFilter : public Http::StreamDecoderFilter {
   void handleDefaultBody();
 
   void lambdafy();
-  static std::string functionUrlPath(const std::string &name,
-                                     const std::string &qualifier);
   void cleanup();
 
   Http::HeaderMap *request_headers_{};
@@ -59,6 +58,10 @@ class AWSLambdaFilter : public Http::StreamDecoderFilter {
   Router::RouteConstSharedPtr route_;
   const AWSLambdaRouteConfig *function_on_route_{};
   bool has_body_{};
+
+  AWSLambdaConfigConstSharedPtr filter_config_;
+
+  CredentialsConstSharedPtr credentials_;
 };
 
 } // namespace AwsLambda