From 9677961b8c4e2a80017c3a2c97feeca73bc5b6ab Mon Sep 17 00:00:00 2001 From: Rob Date: Wed, 11 May 2016 20:33:52 +1000 Subject: [PATCH] Added better example for boto3 exception handling (#2204) --- cloud/amazon/GUIDELINES.md | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/cloud/amazon/GUIDELINES.md b/cloud/amazon/GUIDELINES.md index 225f61f3a49..dbfd3ee1285 100644 --- a/cloud/amazon/GUIDELINES.md +++ b/cloud/amazon/GUIDELINES.md @@ -178,6 +178,8 @@ except BotoServerError, e: For more information on botocore exception handling see [http://botocore.readthedocs.org/en/latest/client_upgrades.html#error-handling] +Boto3 provides lots of useful info when an exception is thrown so pass this to the user along with the message. + ```python # Import ClientError from botocore try: @@ -193,7 +195,20 @@ except ImportError: try: result = connection.aws_call() except ClientError, e: - module.fail_json(msg=e.message) + module.fail_json(msg=e.message, **camel_dict_to_snake_dict(e.response)) +``` + +If you need to perform an action based on the error boto3 returned, use the error code. + +```python +# Make a call to AWS +try: + result = connection.aws_call() +except ClientError, e: + if e.response['Error']['Code'] == 'NoSuchEntity': + return None + else: + module.fail_json(msg=e.message, **camel_dict_to_snake_dict(e.response)) ``` ### Helper functions @@ -220,7 +235,7 @@ key and the dict value is the tag value. Opposite of above. Converts an Ansible dict to a boto3 tag list of dicts. -### get_ec2_security_group_ids_from_names +#### get_ec2_security_group_ids_from_names Pass this function a list of security group names or combination of security group names and IDs and this function will return a list of IDs. You should also pass the VPC ID if known because security group names are not necessarily unique