Using aws cli to add send message permission for SQS

user_13712704 0
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I'm trying to set up an existing SQS Queue as a subscriber to an SNS topic. In the AWS console in the permissions tab, I can set the policy document to 

{
  "Version": "2012-10-17",
  "Id": "arn:aws:sqs:us-east-1:7670234568007:stdsourcequeue/SQSDefaultPolicy",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": "*",
      "Action": "sqs:SendMessage",
      "Resource": "arn:aws:sqs:us-east-1:7670234568007:stdsourcequeue",
      "Condition": {
        "ArnEquals": {
          "aws:SourceArn": "arn:aws:sns:us-east-1:7670234568007:new_posts"
        }
      }
    }
  ]
}

How can I do this using the aws-cli

amazon-sqs amazon-sns amazon-web-services
2 Answers

These are generally managed via the CLI command of add-permission for SQS.

However as you're using your own custom policy the AWS documentation states the following

AddPermission generates a policy for you. You can use SetQueueAttributes to upload your policy.

This would be accessible via the set-queue-attributes function.

Your policy will need to be be converted into a JSON file, against the key value of Policy.

As a word of caution by doing this it will replace the policy attached to your SQS queue, so make sure to validate it before hand.

user_134609330

This is an practical example of how to do it using set-queue-attributes:

cat >/tmp/sqs_polcy << EOL
{
    "Policy": "{\"Version\":\"2012-10-17\",\"Id\":\"arn:aws:sqs:us-east-1:7670234568007:stdsourcequeue\/SQSDefaultPolicy\",\"Statement\":[{\"Effect\":\"Allow\",\"Principal\":\"*\",\"Action\":\"sqs:SendMessage\",\"Resource\":\"arn:aws:sqs:us-east-1:7670234568007:stdsourcequeue\",\"Condition\":{\"ArnEquals\":{\"aws:SourceArn\":\"arn:aws:sns:us-east-1:7670234568007:new_posts\"}}}]}"
}
EOL

aws sqs set-queue-attributes \
    --queue-url https://<your-queue-url> \
    --attributes file:///tmp/sqs_polcy

Above I create /tmp/sqs_polcy file with the policy, which is required for the set-queue-attributes command.

Your policy must be stringified from json, before you can use in the CLI command.

user_2488230
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