MalformedXML when calling the PutBucketLifecycleConfiguration

[theory]

I wrote a policy to configure a lifecycle, but get this error:

botocore.exceptions.ClientError: An error occurred (MalformedXML) when calling the
PutBucketLifecycleConfiguration operation: The XML you provided was not well-formed or did not
validate against our published schema

The policy:

policies:
  - name: s3-log-targets
    resource: s3
    filters:
      - type: is-log-target
        # XXX Filter for buckets without a lifecycle expiration rule?
    actions:
      - type: configure-lifecycle
        rules:
          - ID: retention-policy
            Status: Enabled
            Expiration:
              Days: 30
    mode:
      type: pull

This does abide by the policy in s3.py, and looks similar to the policy I found in resources.json:

    "Lifecycle": {
      "Rules": [
        {
          "Expiration": {
            "Days": 30
          },
          "ID": "Log Retention",
          "Filter": {
            "Prefix": ""
          },
          "Status": "Enabled"
        }
      ]
    }

Is there a way to get c7n to emit the XML it's sending to the API?

[theory]

Ah, fixed by adding the Filter:

          - ID: retention-policy
            Status: Enabled
            Prefix: ""
            Expiration:
              Days: 30

So maybe the schema needs to require it (or Filter/Prefix)?

[kapilt]

per the docs its not clear Prefix or Filter is required for a rule (required: no in the docs). re the xml, its something thats generated much lower down in the sdk stack (by boto3/botocore) not something custodian has access to directly.

https://docs.aws.amazon.com/AmazonS3/latest/API/API_PutBucketLifecycleConfiguration.html
https://docs.aws.amazon.com/AmazonS3/latest/API/API_LifecycleRule.html

[kapilt]

custodian is pretty much straight pass through on the user configuration to the api here, there's very little to no customization that we're doing on a given filter/rule. In this case it appears the service sdk api description and the service actual behavior differ.