Why not just use Slack's built-in options? Even where Docker Hub offers some form of Slack integration, it's often tied to one account, limited in which events it covers, or more than you need. ZestyGlue is a dedicated, always-on feed of exactly the events you choose, for $9/month instead of a full automation-platform subscription.
What it looks like
ZestyGlue
Docker Hub — Image Pushed
myorg/myapp:v1.4.0
pushed by myorg
A real Docker Hub event, shown as ZestyGlue formats it for Slack.
Setup — about two minutes
- Create the connector. In ZestyGlue, start a new Docker Hub → Slack connector. You'll get a unique webhook URL right away.
- Point Docker Hub at it. In your repository, go to Webhooks, and paste in your ZestyGlue webhook URL. That's the only setting — Docker Hub's webhooks have no secret to configure.
- Point Slack at ZestyGlue. Create a Slack app (or reuse one) → Incoming Webhooks → Add New Webhook to Workspace, pick the channel, and copy the URL into ZestyGlue.
Tip: Docker Hub's webhook fires on every push to the repository, including automated CI pushes — if you only want to know about release tags, consider a second repository just for tagged releases.
Events you can forward
image pushed
Questions
Does this work for private repositories?
Yes — Docker Hub's webhook feature works the same for private and public repositories, as long as you have admin access to configure it.
Will this fire for automated builds, not just manual pushes?
Yes, any push triggers the webhook, whether it came from docker push, a CI pipeline, or Docker Hub's own autobuild feature.
Does this need Slack admin approval?
No app installation is required on Slack's side — an Incoming Webhook is just a URL generated once. No OAuth review, no admin approval flow.
What happens if my ZestyGlue subscription lapses?
Events are silently dropped rather than causing errors on Docker Hub's side — Docker Hub never sees a failure response, so it won't retry aggressively or flag your webhook as broken. Your dashboard will simply stop showing new events until you resubscribe.