Storage account Lifecycle management with filter on specific container does not delete the files

Question

Hi all,

I have a storage account with 3 containers defined.
I applied the lifecycle management by filter to delete all files where the last modified date is older than 1 day that are contained in test-legacy container.

the rule applied is the followed:

{
  "rules": [
    {
      "enabled": true,
      "name": "testrule01",
      "type": "Lifecycle",
      "definition": {
        "actions": {
          "version": {
            "delete": {
              "daysAfterCreationGreaterThan": 1
            }
          },
          "baseBlob": {
            "delete": {
              "daysAfterModificationGreaterThan": 1
            }
          },
          "snapshot": {
            "delete": {
              "daysAfterCreationGreaterThan": 1
            }
          }
        },
        "filters": {
          "blobTypes": [
            "blockBlob"
          ],
          "prefixMatch": [
            "test-legacy/*"
          ]
        }
      }
    }
  ]
}

I set test-legacy/* value in the prefix match key, but it doesn't work.

Where am I wrong ?

Thanks

Answer 1

@Galgani, Stefano Welcome to Microsoft Q&A, thank you for posting your here!

The asterisk character * is a valid character in a blob name. If the asterisk character is used in a prefix, then the prefix will match blobs with an asterisk in their names. The asterisk doesn't function as a wildcard character.

A prefix match string like container1/ applies to all blobs in the container named container1. A prefix match string of container1, without the trailing forward slash character (/), applies to all blobs in all containers where the container name begins with the string container1. The prefix will match containers named container11, container1234, container1ab, and so on.

https://learn.microsoft.com/en-us/azure/storage/blobs/lifecycle-management-overview#the-blob-prefix-match-string-didnt-apply-the-policy-to-the-expected-blobs

Hope this helps!
Kindly let us know if the above helps or you need further assistance on this issue.

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