- \n
- In AWS Console<\/a> go to AWS Lambda<\/b>, choose Create a Lambda function<\/b>, it will show you a set of predefined examples. Skip it and specify a name for your function.\u00a0Choose Python 2.7<\/b> in the Runtime <\/b>list box.<\/li>\n<\/ul>\n
You can use any other language supported by the service. We are using Python just to demonstrate the concept.<\/p><\/blockquote>\n
![\"AWS-Lambda-function-code-entry](\"https:\/\/www.msp360.com\/resources\/wp-content\/uploads\/2016\/03\/AWS-Lambda-function-code-entry-example.png\")
<\/p>\n- \n
- Copy and paste<\/b> the following code to the AWS Lambda function code:<\/li>\n<\/ul>\n
from __future__ import print_function\r\n\r\nimport boto3\r\nimport time\r\n\r\ndef lambda_handler(event, context):\r\n for items in event[\"Records\"]:\r\n path = \"\/\" + items[\"s3\"][\"object\"][\"key\"]\r\n print(path)\r\n client = boto3.client('cloudfront')\r\n invalidation = client.create_invalidation(DistributionId='E3U10PP27IQTKJ',\r\n InvalidationBatch={\r\n 'Paths': {\r\n 'Quantity': 1,\r\n 'Items': [path]\r\n },\r\n 'CallerReference': str(time.time())\r\n })\r\n<\/pre>\n- \n
- Define the permissions for your function by choosing Basic Execution<\/b> IAM role in the Role <\/b>list box. Use list permissions below to successfully execute the script.<\/li>\n<\/ul>\n
{\r\n \"Version\": \"2012-10-17\",\r\n \"Statement\": [\r\n {\r\n \"Effect\": \"Allow\",\r\n \"Action\": [\r\n \"logs:CreateLogGroup\",\r\n \"logs:CreateLogStream\",\r\n \"logs:PutLogEvents\"\r\n ],\r\n \"Resource\": \"arn:aws:logs:*:*:*\"\r\n },\r\n\t{\r\n \"Effect\": \"Allow\",\r\n \"Action\": [\r\n \"cloudfront:CreateInvalidation\"\r\n ],\r\n \"Resource\": [\r\n \"*\"\r\n ]\r\n }\r\n ]\r\n}\r\n<\/pre>\n- \n
- In Advanced settings <\/b>choose the amount of memory should be dedicated for processing the code. Keep it 128 MB<\/b>, as it\u2019s enough.<\/li>\n<\/ul>\n
![\"Configuring-Lambda-function-IAM-role-and-timeout\"](\"https:\/\/www.msp360.com\/resources\/wp-content\/uploads\/2016\/03\/Configuring-Lambda-function-IAM-role-and-timeout.png\")
<\/p>\n<\/a>![\"CTA\"](\"https:\/\/no-cache.hubspot.com\/cta\/default\/5442029\/aa07fdb8-7776-46a5-9fa0-ec6e93f0f0a6.png\")
<\/a><\/span><\/span><\/div>\n- \n
- \n
- \n
- Increase a Timeout<\/b> for a function, if you have a lot of objects that need invalidation<\/li>\n
- Press Next<\/b> and choose the\u00a0Create function<\/b><\/li>\n
- In the function edit wizard, go to Event<\/b> sources <\/b>and press Add event source<\/b><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
![\"cloudfront-invalidation-aws-lambda-event-sources-configuration\"](\"https:\/\/www.msp360.com\/resources\/wp-content\/uploads\/2016\/03\/cloudfront-invalidation-aws-lambda-event-sources-configuration.png\")
<\/p>\n- \n
- Choose<\/b> S3 <\/b>as your Event source, then choose your origin bucket and in the Event type<\/b>, choose Object Created (All)<\/b> and press Submit<\/b><\/li>\n<\/ul>\n
![\"cloudfront-invalidation-aws-lambda-add-event-source-configuration\"](\"https:\/\/www.msp360.com\/resources\/wp-content\/uploads\/2016\/03\/cloudfront-invalidation-aws-lambda-add-event-source-configuration.png\")
<\/p>\nConclusion<\/h2>\n
Now you\u2019ve enabled an AWS Lambda function that invalidates objects in Amazon CloudFront edge locations and synchronizes objects automatically. In practice this means the object will be delivered to the end-user as soon as it is uploaded to the origin server, saving a lot of time for a webmaster.<\/p>\n
- Press Next<\/b> and choose the\u00a0Create function<\/b><\/li>\n
- Increase a Timeout<\/b> for a function, if you have a lot of objects that need invalidation<\/li>\n
- \n
- In Advanced settings <\/b>choose the amount of memory should be dedicated for processing the code. Keep it 128 MB<\/b>, as it\u2019s enough.<\/li>\n<\/ul>\n
- Define the permissions for your function by choosing Basic Execution<\/b> IAM role in the Role <\/b>list box. Use list permissions below to successfully execute the script.<\/li>\n<\/ul>\n
- Copy and paste<\/b> the following code to the AWS Lambda function code:<\/li>\n<\/ul>\n