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open-telemetry · Jul 26, 2021 · d481dcb · d481dcb
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diff --git a/instrumentation/github.com/aws/aws-lambda-go/otellambda/example/Dockerfile b/instrumentation/github.com/aws/aws-lambda-go/otellambda/example/Dockerfile
@@ -0,0 +1,28 @@
+# Copyright The OpenTelemetry Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+FROM golang:1.16 AS base
+COPY . /src/
+WORKDIR /src/instrumentation/github.com/aws/aws-lambda-go/otellambda/example
+RUN apt-get update
+
+FROM base AS aws-lambda
+
+# install other package(s) in base
+RUN apt-get install zip unzip
+RUN curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip" \
+    && unzip awscliv2.zip \
+    && ./aws/install
+RUN apt-get -y install jq
+
+CMD ["./build.sh"]
diff --git a/instrumentation/github.com/aws/aws-lambda-go/otellambda/example/README.md b/instrumentation/github.com/aws/aws-lambda-go/otellambda/example/README.md
@@ -0,0 +1,34 @@
+# aws/aws-lambda-go instrumentation example
+
+A simple example to demonstrate the AWS Lambda for Go instrumentation. In this example, container `aws-lambda-client` initializes an S3 client and an HTTP client and runs 2 basic operations: `listS3Buckets` and `GET`.
+
+
+These instructions assume you have
+[docker-compose](https://docs.docker.com/compose/) installed and setup, and [AWS credential](https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-files.html) configured.
+
+1. From within the `example` directory, bring up the project by running:
+
+    ```sh
+    docker-compose up --detach
+    ```
+
+2. The instrumentation works with a `stdout` exporter. The example pulls this output from AWS and outputs back to stdout. 
+   To inspect the output (following build output), you can run:
+
+    ```sh
+    docker-compose logs
+    ```
+3. After inspecting the client logs, the example can be cleaned up by running:
+
+    ```sh
+    docker-compose down
+    ```
+
+Note: Because the example runs on AWS Lambda, a handful of resources are created in AWS by the 
+      example. The example will automatically destroy any resources it makes; however, if you
+      terminate the container before it completes you may have leftover resources in AWS. Should
+      you terminate the container early, run the below command to ensure all AWS resources are cleaned up: 
+
+```sh
+./manualAWSCleanup.sh
+```
diff --git a/...rumentation/github.com/aws/aws-lambda-go/otellambda/example/assumeRolePolicyDocument.json b/...rumentation/github.com/aws/aws-lambda-go/otellambda/example/assumeRolePolicyDocument.json
@@ -0,0 +1,10 @@
+{
+  "Version": "2012-10-17",
+  "Statement": [
+    {
+      "Effect": "Allow",
+      "Principal": { "Service": "lambda.amazonaws.com" },
+      "Action": "sts:AssumeRole"
+    }
+  ]
+}
diff --git a/instrumentation/github.com/aws/aws-lambda-go/otellambda/example/build.sh b/instrumentation/github.com/aws/aws-lambda-go/otellambda/example/build.sh
@@ -0,0 +1,82 @@
+#!/bin/sh
+
+# constants
+LAMBDA_FUNCTION_NAME=SampleLambdaGo
+ROLE_NAME="$LAMBDA_FUNCTION_NAME"Role
+POLICY_NAME="$LAMBDA_FUNCTION_NAME"Policy
+LOG_GROUP_NAME=/aws/lambda/"$LAMBDA_FUNCTION_NAME"
+AWS_ACCT_ID=$(aws sts get-caller-identity | jq '.Account | tonumber')
+MAX_CREATE_TRIES=5
+MAX_GET_LOG_STREAM_TRIES=10
+
+# build go executable
+echo "1/6 Building go executable"
+GOOS=linux GOARCH=amd64 go build -o ./build/bootstrap . > /dev/null
+cd build || exit
+zip bootstrap.zip bootstrap > /dev/null
+
+# create AWS resources
+echo "2/6 Creating necessary resources in AWS"
+aws iam create-role --role-name "$ROLE_NAME" --assume-role-policy-document file://../assumeRolePolicyDocument.json > /dev/null
+aws iam create-policy --policy-name "$POLICY_NAME" --policy-document file://../policyForRoleDocument.json > /dev/null
+aws iam attach-role-policy --role-name "$ROLE_NAME" --policy-arn arn:aws:iam::"$AWS_ACCT_ID":policy/"$POLICY_NAME" > /dev/null
+aws logs create-log-group --log-group-name "$LOG_GROUP_NAME" > /dev/null
+
+# race condition exists such that a role can be created and validated
+# via IAM, yet still cannot be assumed by Lambda, we will retry up to
+# MAX_CREATE_TRIES times to create the function
+TIMEOUT="$MAX_CREATE_TRIES"
+CREATE_FUNCTION_SUCCESS=$(aws lambda create-function --function-name "$LAMBDA_FUNCTION_NAME" --runtime provided.al2 --handler bootstrap --zip-file fileb://bootstrap.zip --role arn:aws:iam::"$AWS_ACCT_ID":role/"$ROLE_NAME" --timeout 5 --tracing-config Mode=Active > /dev/null || echo "false")
+while [ "$CREATE_FUNCTION_SUCCESS" = "false" ] && [ "$TIMEOUT" -ne 1 ] ; do
+  echo "    Retrying create-function, role likely not ready for use..."
+  sleep 1
+  TIMEOUT=$((TIMEOUT - 1))
+  CREATE_FUNCTION_SUCCESS=$(aws lambda create-function --function-name "$LAMBDA_FUNCTION_NAME" --runtime provided.al2 --handler bootstrap --zip-file fileb://bootstrap.zip --role arn:aws:iam::"$AWS_ACCT_ID":role/"$ROLE_NAME" --timeout 5 --tracing-config Mode=Active > /dev/null || echo "false")
+done
+if [ "$TIMEOUT" -eq 1 ] ; then
+  echo "Error: max retries reached when attempting to create Lambda Function"
+fi
+
+# invoke lambda
+echo "3/6 Invoking lambda"
+aws lambda invoke --function-name "$LAMBDA_FUNCTION_NAME" --payload "" resp.json
+
+# get logs from lambda (via cloudwatch)
+# logs sent from lambda to Cloudwatch and retrieved
+# from there because example logs are too long to
+# return directly from lambda invocation
+echo "4/6 Storing logs from AWS"
+
+# significant (3+ second) delay can occur between invoking Lambda and
+# the related log stream existing in Cloudwatch. We will retry to
+# retrieve the log stream up to MAX_GET_LOG_STREAM_TRIES
+TIMEOUT="$MAX_GET_LOG_STREAM_TRIES"
+LOG_STREAM_NAME=$(aws logs describe-log-streams --log-group-name "$LOG_GROUP_NAME" --order-by LastEventTime --descending | jq --raw-output '.logStreams[0].logStreamName')
+while [ "$LOG_STREAM_NAME" = "null" ] && [ "$TIMEOUT" -ne 1 ] ; do
+  echo "    Waiting for log stream to be created..."
+  sleep 1
+  TIMEOUT=$((TIMEOUT - 1))
+  LOG_STREAM_NAME=$(aws logs describe-log-streams --log-group-name "$LOG_GROUP_NAME" --order-by LastEventTime --descending | jq --raw-output '.logStreams[0].logStreamName')
+done
+if [ "$TIMEOUT" -eq 1 ] ; then
+  echo "Timed out waiting for log stream to be created"
+fi
+
+# minor (<1 second) delay can exist when adding logs to the
+# log stream such that only partial logs will be returned.
+# Will wait small amount of time to let logs fully populate
+sleep 2
+aws logs get-log-events --log-group-name "$LOG_GROUP_NAME" --log-stream-name "$LOG_STREAM_NAME" | jq --join-output '.events[] | select(has("message")) | .message' | jq -R -r '. as $line | try fromjson catch $line' > lambdaLogs
+
+# destroy lambda resources
+echo "5/6 Destroying AWS resources"
+aws logs delete-log-stream --log-group-name "$LOG_GROUP_NAME" --log-stream-name "$LOG_STREAM_NAME"
+aws logs delete-log-group --log-group-name "$LOG_GROUP_NAME"
+aws lambda delete-function --function-name $LAMBDA_FUNCTION_NAME
+aws iam detach-role-policy --role-name "$ROLE_NAME" --policy-arn arn:aws:iam::"$AWS_ACCT_ID":policy/"$POLICY_NAME"
+aws iam delete-policy --policy-arn arn:aws:iam::"$AWS_ACCT_ID":policy/"$POLICY_NAME"
+aws iam delete-role --role-name "$ROLE_NAME"
+
+# display logs
+printf "6/6 Displaying logs from AWS:\n\n\n"
+cat lambdaLogs
diff --git a/instrumentation/github.com/aws/aws-lambda-go/otellambda/example/docker-compose.yml b/instrumentation/github.com/aws/aws-lambda-go/otellambda/example/docker-compose.yml
@@ -0,0 +1,31 @@
+# Copyright The OpenTelemetry Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+version: "3.7"
+services:
+  aws-lambda-client:
+    build:
+      dockerfile: $PWD/Dockerfile
+      context: ../../../../../..
+    ports:
+      - "8080:80"
+    command:
+      - "/bin/sh"
+      - "-c"
+      - "./build.sh"
+    volumes:
+      - ~/.aws:/root/.aws
+    networks:
+      - example
+networks:
+  example:
diff --git a/instrumentation/github.com/aws/aws-lambda-go/otellambda/example/go.mod b/instrumentation/github.com/aws/aws-lambda-go/otellambda/example/go.mod
@@ -0,0 +1,22 @@
+module go.opentelemetry.io/contrib/instrumentation/github.com/aws/aws-lambda-g/otellambda/example
+
+go 1.16
+
+replace (
+	go.opentelemetry.io/contrib/detectors/aws/lambda => ../../../../../../detectors/aws/lambda
+	go.opentelemetry.io/contrib/instrumentation/github.com/aws/aws-lambda-go/otellambda => ../
+)
+
+require (
+	github.com/aws/aws-lambda-go v1.25.0
+	github.com/aws/aws-sdk-go-v2/config v1.5.0
+	github.com/aws/aws-sdk-go-v2/service/s3 v1.11.1
+	go.opentelemetry.io/contrib/detectors/aws/lambda v0.21.0
+	go.opentelemetry.io/contrib/instrumentation/github.com/aws/aws-lambda-go/otellambda v0.21.0
+	go.opentelemetry.io/contrib/instrumentation/github.com/aws/aws-sdk-go-v2/otelaws v0.21.0
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.21.0
+	go.opentelemetry.io/otel v1.0.0-RC1
+	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.0.0-RC1
+	go.opentelemetry.io/otel/sdk v1.0.0-RC1
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
+)
diff --git a/instrumentation/github.com/aws/aws-lambda-go/otellambda/example/go.sum b/instrumentation/github.com/aws/aws-lambda-go/otellambda/example/go.sum
@@ -0,0 +1,85 @@
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