linux_wiki:lambda_python_function

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linux_wiki:lambda_python_function [2019/07/31 21:38]
billdozor [File Conversion Example: Packaging] 		linux_wiki:lambda_python_function [2019/08/09 22:13]
billdozor [Lambda: Pre-Reqs]
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 See below for Lambda examples. See below for Lambda examples.
   * File Conversion Example - convert images from one format to another when created in a S3 bucket.   * File Conversion Example - convert images from one format to another when created in a S3 bucket.
 +  * Stop/Start EC2 Instances Example - stop/start ec2 instances with a certain tag key:value on a schedule.
  
  
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             "Action": [             "Action": [
                 "s3:PutObject",                 "s3:PutObject",
-                "s3:GetObject"+                "s3:GetObject", 
 +                "s3:ListBucket"
             ],             ],
             "Resource": "arn:aws:s3:::my-test-bucket/*"             "Resource": "arn:aws:s3:::my-test-bucket/*"
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             "Sid": "VisualEditor1",             "Sid": "VisualEditor1",
             "Effect": "Allow",             "Effect": "Allow",
-            "Action": [ +            "Action": "s3:HeadBucket",
-                "s3:ListAllMyBuckets", +
-                "s3:ListBucket", +
-                "s3:HeadBucket" +
-            ],+
             "Resource": "*"             "Resource": "*"
         }         }
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 ===== File Conversion Example: Packaging ===== ===== File Conversion Example: Packaging =====
  
-  * Create the directory and python3 virtual environment<code bash>mkdir convertImage +  * Create a directory named after the lambda function<code bash>mkdir convertImage</code>
-cd convertImage +
-python3 -m venv venv</code>+
  
-  * Activate the virtualenv and install required packages<code bash>source venv/bin/activate +  * Install required packages into that directory<code bash>pip3 install --target convertImage/ Pillow</code>
-pip install Pillow</code>+
  
-  * Create the lambda function file<code bash>vim lambda_function.py+  * Create the lambda function file<code bash>vim convertImage/lambda_function.py
  
 import json import json
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     * **Notes**     * **Notes**
       * The above is the default code that is created for you in a from scratch lambda function in the console.       * The above is the default code that is created for you in a from scratch lambda function in the console.
-      * For the File conversion example and others, see: https://gitlab.com/whowe/aws+      * For the File conversion example and others, see: https://gitlab.com/whowe/aws/tree/master/lambda/ 
 + 
 +  * Package up the directory into a zip<code bash>cd convertImage 
 +zip -r convertImage.zip .</code> 
 +    * **Important**: The archive that is created should NOT contain a parent directory, as this parent directory already exists in AWS Lambda for your function. The "lambda_function.py" needs to be at the root of your structure.
  
-  * Deactivate the virtualenv<code bash>deactivate</code> +  * Upload to AWS Lambda 
-  * Package up the directory into a zip<code bash>cd .. +    * CLI Method<code bash>aws lambda update-function-code --function-name convertImage --zip-file fileb://convertImage.zip</code> 
-zip -r convertImage.zip convertImage</code>+    * Web Console Method 
 +      * Login to your AWS console 
 +      * Services > Compute > Lambda 
 +      * Click "Functions > <your function name>" 
 +      * Under "Function code" > "Code entry type" 
 +        * Click the dropdown and select "Upload a .zip file" 
 +        * Under "Function package", click "Upload" 
 +        * Browse to your file and select it 
 +      * In the top right, click "Save"
  
 ---- ----
  
  • linux_wiki/lambda_python_function.txt
  • Last modified: 2019/08/09 22:29
  • by billdozor