Updating Azure Artifact Manager plugin to use Azure CDN

Skip to first unread message

Ian Boudreaux

Aug 11, 2022, 7:38:27 PM8/11/22
to Jenkins Developers
Hi all,

I am trying to update the Azure Artifact manager plugin to be capable of using an Azure content delivery network (CDN) link for the produced artifacts available through Jenkins instead of the direct Azure blob storage links. The reason I am doing this is because downloads from the blob storage directly are throttled and downloads from the CDN are considerably faster, especially for geographically distributed users.

This is also my first time trying to modify a Jenkins plugin, so I do acknowledge a lack of knowledge in general Jenkins plugin development. That being said, I've been investigating the Azure Artifact Manager source code for a couple days and I've determined this:
  1. toExternalURL in the AzureBlobVirtualFile class, seems to be what determines the final link that users would see in Jenkins to click upon that would download the blob artifact from the CDN. I removed the "sas" variable from this URL and confirmed that the generated URL in Jenkins that a user sees was missing the shared access signature and thus inaccessible, so this confirmed it for me.
  2. I also know that, eventually, I would need to update the Azure storage plugin to take in a CDN URL through the Jenkins Azure Storage credential, do validation on that URL, and then pass that URL into the Azure Artifact Manager plugin
That being said, the first problem I am having is finding a way to manually change the external URL in the Azure Artifact Manager so that it uses the CDN URL instead of the blob storage URL to prove this is possible before I dive deeper into the Azure storage plugin and passing the credential around.

I've tried modifying the toExternalUrl method in the AzureBlobVirtualFile class by replacing the blob storage endpoint URL string with a manually input string of my CDN endpoint URL, but no matter what I try (except removing the '"sas" variable) I get a NullPointerException when trying to change the external URL string to anything other than a string that points to the blob storage endpoint URL:
  • java.lang.NullPointerException
    • at com.microsoftopentechnologies.windowsazurestorage.helper.AzureStorageAccount.convertToStorageAccountInfo(AzureStorageAccount.java:254)
    • at com.microsoft.jenkins.artifactmanager.Utils.getStorageAccount(Utils.java:90)
    • at com.microsoft.jenkins.artifactmanager.AzureArtifactManager.archive(AzureArtifactManager.java:123)
    • at hudson.tasks.ArtifactArchiver.perform(ArtifactArchiver.java:258)
Does anyone have any ideas on where to go from here? All I really need to do is swap the endpoint URL link at the very end of the artifact archiving process so that the artifact link that shows in Jenkins points to the CDN URL instead of the blob storage URL.


Tim Jacomb

Aug 12, 2022, 4:03:39 AM8/12/22
to jenkin...@googlegroups.com

You received this message because you are subscribed to the Google Groups "Jenkins Developers" group.
To unsubscribe from this group and stop receiving emails from it, send an email to jenkinsci-de...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/jenkinsci-dev/432a78bf-c750-455b-aa5c-d1d01c09f3b9n%40googlegroups.com.

Ian Boudreaux

Nov 28, 2023, 11:18:29 AM11/28/23
to Jenkins Developers
Reply all
Reply to author
0 new messages