AWS Serverless with Chalice
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The document discusses serverless computing using AWS Lambda. It provides an overview of serverless architecture and patterns, describing how Lambda functions can be triggered by events from other AWS services asynchronously or invoked directly. It also demonstrates how to create a Python Lambda function that returns a greeting based on an event payload, including zipping the code, creating an IAM role, and deploying the function.
![© 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved.
Creating our first Lambda Function
70
$ zip -r app.zip app.py1
2 $ aws iam create-role
--role-name MyApp
--assume-role-policy-document '{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": {
"Service": "lambda.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
}'](https://image.slidesharecdn.com/aws-serverless-200411111129/85/AWS-Serverless-with-Chalice-66-320.jpg)
![© 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved.
Creating our first Lambda Function
71
$ zip -r app.zip app.py1
2 $ aws iam create-role
--role-name MyApp
--assume-role-policy-document '{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": {
"Service": "lambda.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
}'
$ aws lambda create-function
--function-name hello
--handler app.handler
--runtime python3.6
--role arn:aws:iam::635100884080:role/MyApp
--zip "fileb://./app.zip"
3](https://image.slidesharecdn.com/aws-serverless-200411111129/85/AWS-Serverless-with-Chalice-67-320.jpg)
![© 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved.
Creating our first Lambda Function
72
$ zip -r app.zip app.py1
2 $ aws iam create-role
--role-name MyApp
--assume-role-policy-document '{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": {
"Service": "lambda.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
}'
$ aws lambda create-function
--function-name hello
--handler app.handler
--runtime python3.6
--role arn:aws:iam::635100884080:role/MyApp
--zip "fileb://./app.zip"
3](https://image.slidesharecdn.com/aws-serverless-200411111129/85/AWS-Serverless-with-Chalice-68-320.jpg)
![© 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved.
Creating our first Lambda Function
73
$ zip -r app.zip app.py1
2 $ aws iam create-role
--role-name MyApp
--assume-role-policy-document '{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Principal": {
"Service": "lambda.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
}'
$ aws lambda create-function
--function-name hello
--handler app.handler
--runtime python3.6
--role arn:aws:iam::123456789012:role/MyApp
--zip "fileb://./app.zip"
3](https://image.slidesharecdn.com/aws-serverless-200411111129/85/AWS-Serverless-with-Chalice-69-320.jpg)
AWS Serverless with Chalice
- 1. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Going Serverless with AWS 1 Suman Debnath Principal Developer Advocate
- 2. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. 2 • Serverless Computing • Serverless Architecture • Serverless Application with Python
- 3. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. 3 • Serverless Computing • Serverless Architecture • Serverless Application with Python
- 4. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. 4 Build and run applications without thinking about servers Serverless Computing 4
- 5. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Serverless Computing No servers to provision, scale or manage Flexible scaling Built-in availability and fault tolerance 5
- 6. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda 6 • Run code without thinking about servers • Pay for only the compute time you consume • Lambda takes care of everything required to run and scale your code with high availability 6
- 7. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function 7 7
- 8. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function 8 8
- 9. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function 9 Define python function1 9
- 10. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function 10 Define python function1 event - data about what triggered invocation context - runtime information about your function 2 10
- 11. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function 11 Define python function1 event - data about what triggered invocation context - runtime information about your function 2 11 Return value sent back as response3
- 12. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function 12 Define python function1 event - data about what triggered invocation context - runtime information about your function 2 Return value sent back as response3 app.py 12
- 13. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function 13 Define python function1 event - data about what triggered invocation context - runtime information about your function 2 Return value sent back as response3 app.py 13
- 14. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function 14 Define python function1 event - data about what triggered invocation context - runtime information about your function 2 Return value sent back as response3 app.py >>> import app >>> app.handler(event={}, context=None) 'hello world!' $ python 14
- 15. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function 15 Define python function1 event - data about what triggered invocation context - runtime information about your function 2 Return value sent back as response3 app.py 15
- 16. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function 16 Define python function1 event - data about what triggered invocation context - runtime information about your function 2 Return value sent back as response3 app.py $ pip install awscli 16
- 17. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function 17 Define python function1 event - data about what triggered invocation context - runtime information about your function 2 Return value sent back as response3 app.py $ pip install awscli $ aws config 17
- 18. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function 18 Define python function1 event - data about what triggered invocation context - runtime information about your function 2 Return value sent back as response3 app.py 18
- 19. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function 19 Define python function1 event - data about what triggered invocation context - runtime information about your function 2 Return value sent back as response3 app.py $ aws lambda create-function --function-name hello --handler app.handler --runtime python3.6 --role arn:aws:iam::635100884080:role/MyApp --zip "fileb://./app.zip" 19
- 20. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function 20 Define python function1 event - data about what triggered invocation context - runtime information about your function 2 Return value sent back as response3 app.py $ aws lambda create-function --function-name hello --handler app.handler --runtime python3.6 --role arn:aws:iam::635100884080:role/MyApp --zip "fileb://./app.zip” $ aws lambda invoke --function-name hello output 20
- 21. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function 21 Define python function1 event - data about what triggered invocation context - runtime information about your function 2 Return value sent back as response3 app.py $ aws lambda create-function --function-name hello --handler app.handler --runtime python3.6 --role arn:aws:iam::635100884080:role/MyApp --zip "fileb://./app.zip” $ aws lambda invoke --function-name hello output $ cat output hello world! 21
- 22. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function Input 22 app.py 22
- 23. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function Input 23 app.py $ aws lambda invoke --function-name hello --payload ‘{“foo": ”bar"}' output 23
- 24. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function Input 24 app.py $ aws lambda invoke --function-name hello --payload ‘{“foo": ”bar"}' output 24
- 25. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function Input 25 app.py $ aws lambda invoke --function-name hello --payload ‘{“foo": ”bar"}' output $ cat output BAR 25
- 26. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function Input 26 app.py $ aws lambda invoke --function-name hello --payload ‘{“foo": ”bar"}' output $ cat output BAR $ aws lambda invoke --function-name hello --payload ‘{“foo": ”baz"}' output 26
- 27. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function Input 27 app.py $ aws lambda invoke --function-name hello --payload ‘{“foo": ”bar"}' output $ cat output BAR $ aws lambda invoke --function-name hello --payload ‘{“foo": ”baz"}' output $ cat output BAZ 27
- 28. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function Invocation 28
- 29. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function Invocation 29 $ aws lambda invoke --function-name hello --payload ‘{“foo": ”bar"}' output
- 30. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function Invocation 30 $ aws lambda invoke --function-name hello --payload ‘{“foo": ”bar"}' output Download Code
- 31. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function Invocation 31 $ aws lambda invoke --function-name hello --payload ‘{“foo": ”bar"}' output Download Code Start new container
- 32. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function Invocation 32 $ aws lambda invoke --function-name hello --payload ‘{“foo": ”bar"}' output Download Code Start new container Bootstrap the runtime
- 33. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function Invocation 33 $ aws lambda invoke --function-name hello --payload ‘{“foo": ”bar"}' output Download Code Start new container Bootstrap the runtime Start Code
- 34. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function Invocation 34 $ aws lambda invoke --function-name hello --payload ‘{“foo": ”bar"}' output Download Code Start new container Bootstrap the runtime Start Code Cold Start
- 35. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function Invocation 35 $ aws lambda invoke --function-name hello --payload ‘{“foo": ”bar"}' output Download Code Start new container Bootstrap the runtime Start Code Cold Start Warm Start
- 36. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda Function Invocation 36 $ aws lambda invoke --function-name hello --payload ‘{“foo": ”bar"}' output Download Code Start new container Bootstrap the runtime Start Code Cold Start Warm Start $ aws lambda invoke --function-name hello --payload ‘{“foo": ”baz"}' output
- 37. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. 37 • Serverless Computing • Serverless Architecture • Serverless Application with Python
- 38. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Serverless Architecture Patterns 38
- 39. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Serverless Architecture 39 Event Trigger Lambda Services Amazon API Gateway Timer SQS message Amazon DynamoDB Amazon S3
- 40. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Serverless Architecture 40 Event Trigger Lambda Services Amazon API Gateway Timer SQS message Amazon DynamoDB Amazon S3 Think in terms of events
- 41. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Serverless Architecture 41 Event Trigger Lambda Services Amazon API Gateway Timer SQS message Amazon DynamoDB Amazon S3
- 42. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Serverless Architecture 42 Event Trigger Lambda Services Amazon API Gateway Timer SQS message Amazon DynamoDB Amazon S3 Decompose code into separate functions
- 43. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Synchronous Invocation 43 Event Trigger Lambda $ aws lambda invoke Manual Invocation
- 44. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Synchronous Invocation 44 Event Trigger Lambda REST API Request GET /users {“http”: “response”}
- 45. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Async Invocation 45 Event Trigger Lambda Services
- 46. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Async Invocation 46 Event Trigger Lambda Services Amazon S3 Object upload 1
- 47. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Async Invocation 47 Event Trigger Lambda Services Amazon S3 Object upload 1 2 Return immediately
- 48. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Async Invocation 48 Event Trigger Lambda Services Amazon S3 Object upload 1 2 Return immediately 3 Event trigger notification
- 49. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Async Invocation 49 Event Trigger Lambda Services Amazon S3 Object upload 1 2 Return immediately 3 Event trigger notification 4 Generates thumbnail
- 50. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Async Invocation 50 Event Trigger Lambda Services Amazon S3 Object upload 1 2 Return immediately 3 Event trigger notification 4 Generates thumbnail 5 Upload complete Uploads to output bucket
- 51. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Stream/Poll Invocation 51 Event Trigger Lambda Poller Lambda
- 52. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Stream/Poll Invocation 52 Event Trigger Lambda Poller Lambda Amazon SQS message added 1 2 Return immediately
- 53. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Stream/Poll Invocation 53 Event Trigger Lambda Poller Lambda Amazon SQS message added 1 2 Return immediately 3 Poll for messages
- 54. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Stream/Poll Invocation 54 Event Trigger Lambda Poller Lambda Amazon SQS message added 1 2 Return immediately 3 Poll for messages 4 Message batch
- 55. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Stream/Poll Invocation 55 Event Trigger Lambda Poller Lambda Amazon SQS message added 1 2 Return immediately 3 Poll for messages 4 Message batch 5 Lambda function invoked
- 56. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Stream/Poll Invocation 56 Event Trigger Lambda Poller Lambda Amazon SQS message added 1 2 Return immediately 3 Poll for messages 4 Message batch 5 Lambda function invoked Function execution finished
- 57. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Synchronous 57 Asynchronous Stream Blocks until response is returned from Lambda function Lambda function triggered in response to an event, decoupled from event trigger Lambda service polls for changes on a stream, invokes Lambda function with batch of messages
- 58. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Synchronous 58 Asynchronous Stream Blocks until response is returned from Lambda function Lambda function triggered in response to an event, decoupled from event trigger Lambda service polls for changes on a stream, invokes Lambda function with batch of messages $ aws lambda invoke Amazon API Gateway request /users
- 59. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Synchronous 59 Asynchronous Stream Blocks until response is returned from Lambda function Lambda function triggered in response to an event, decoupled from event trigger Lambda service polls for changes on a stream, invokes Lambda function with batch of messages $ aws lambda invoke Amazon API Gateway request /users Timer Amazon S3 Object Amazon SNS Topic
- 60. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Synchronous 60 Asynchronous Stream Blocks until response is returned from Lambda function Lambda function triggered in response to an event, decoupled from event trigger Lambda service polls for changes on a stream, invokes Lambda function with batch of messages $ aws lambda invoke Amazon API Gateway request /users Timer Amazon S3 Object Amazon SNS Topic Amazon SQS Message Amazon DynamoDB Stream Amazon Kinesis Stream
- 61. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. 61 • Serverless Computing • Serverless Architecture • Serverless Application with Python
- 62. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. 62 Serverless Application using Python
- 63. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Lambda 63
- 64. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Creating our first Lambda Function 68
- 65. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Creating our first Lambda Function 69 $ zip -r app.zip app.py1
- 66. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Creating our first Lambda Function 70 $ zip -r app.zip app.py1 2 $ aws iam create-role --role-name MyApp --assume-role-policy-document '{ "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Principal": { "Service": "lambda.amazonaws.com" }, "Action": "sts:AssumeRole" } ] }'
- 67. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Creating our first Lambda Function 71 $ zip -r app.zip app.py1 2 $ aws iam create-role --role-name MyApp --assume-role-policy-document '{ "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Principal": { "Service": "lambda.amazonaws.com" }, "Action": "sts:AssumeRole" } ] }' $ aws lambda create-function --function-name hello --handler app.handler --runtime python3.6 --role arn:aws:iam::635100884080:role/MyApp --zip "fileb://./app.zip" 3
- 68. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Creating our first Lambda Function 72 $ zip -r app.zip app.py1 2 $ aws iam create-role --role-name MyApp --assume-role-policy-document '{ "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Principal": { "Service": "lambda.amazonaws.com" }, "Action": "sts:AssumeRole" } ] }' $ aws lambda create-function --function-name hello --handler app.handler --runtime python3.6 --role arn:aws:iam::635100884080:role/MyApp --zip "fileb://./app.zip" 3
- 69. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Creating our first Lambda Function 73 $ zip -r app.zip app.py1 2 $ aws iam create-role --role-name MyApp --assume-role-policy-document '{ "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Principal": { "Service": "lambda.amazonaws.com" }, "Action": "sts:AssumeRole" } ] }' $ aws lambda create-function --function-name hello --handler app.handler --runtime python3.6 --role arn:aws:iam::123456789012:role/MyApp --zip "fileb://./app.zip" 3
- 70. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Chailce 80 • Python Serverless Microframework • Create and deploy serverless applications • Integration with may other AWS services © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Chailce 80 • Python Serverless Microframework • Create and deploy serverless applications • Integration with may other AWS services
- 71. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Chalice 81 Lambda app.py AWS Lambda
- 72. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Chalice 82 Lambda chalice AWS Lambda app.py
- 73. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Chalice 83 Lambda chalice AWS Lambda app.py app defined at module level1
- 74. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. AWS Chalice 84 Lambda chalice AWS Lambda app.py app defined at module level1 one or more decorators can be defined2
- 75. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Deployment 85 $ chalice deploy Creating deployment package. Updating policy for IAM role: helloworld-dev Creating lambda function: helloworld-dev-hello_world Deleting Rest API: 56mbn4ke87 Deleting function: arn:aws:lambda:us-west-2:635100884080:function:helloworld-dev Resources deployed: - Lambda ARN: arn:aws:lambda:us-west-2:635100884080:function:helloworld-dev-hello_world $ chalice invoke -n hello_world "hello world!" app.py
- 76. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. S3 Image Thumbnail Generator 86
- 77. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. S3 Image Thumbnail Generator 87 3rd party extensions automatically handled from requirements.txt
- 78. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. S3 Image Thumbnail Generator 88 Client created in module scope Only part of cold-start time
- 79. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. S3 Image Thumbnail Generator 89 Client created in module scope Only part of cold-start time Module Import
- 80. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. S3 Image Thumbnail Generator 90 Trigger function when object is uploaded to S3://mydemoimgbucket/.jpg
- 81. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. S3 Image Thumbnail Generator 91
- 82. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. S3 Image Thumbnail Generator 92 Event dictionary mapped to python object download_file method from boto3 will download file parts in parallel
- 83. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. S3 Image Thumbnail Generator 93 Generate 256x256 image and save image to a temporary file
- 84. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. S3 Image Thumbnail Generator 94 Upload thumbnail back to S3, upload_file from boto3 will use parallelized multi part upload if needed
- 85. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Other Chalice Decorators 107
- 86. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. 108 Serverless Computing Serverless Architecture Serverless Application with Python
- 87. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Resources 109 • Introduction to AWS Lambda and Chalice • GitHub for Chalice • Serverless Framework for AWS • AWS re:Invent 2018: A Serverless Journey: AWS Lambda Under the Hood
- 88. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. Stay Connected 110 /suman-d /_sumand
- 89. © 2020, Amazon Web Services, Inc. or its affiliates. All rights reserved. 111 @_sumand