Compare release tags with Docker Hub from Slack
When a release discussion flags a mismatch, Notis can fetch the current tag list to help the team spot what is actually available.
Trigger
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
Action
List Repository Tags
Tool to list tags for a Docker Hub repository. Use after specifying namespace and repository.
Why this helps
Release mismatches create uncertainty and follow-up work when the live tag list is not easy to check.
- Provides a current list to support mismatch investigations.
- Reduces the number of manual checks in a release conversation.
- Helps teams pick up the issue with less context rebuilding.
Setup
Build it in a few focused steps.
- 1Connect Slack and Docker Hub to Notis once in the portal.
- 2Write one instruction to list tags for the named Docker Hub repository when Slack reports a release tag mismatch.
- 3Select Channel Message Received and choose a channel for run reports.
- 4Test with a real mismatch investigation naming an accessible repository.
Questions about this workflow
Will this change any tags?
No. It only lists the repository's tags to support comparison.
What if the mismatch message does not name a repository?
Tell Notis to ask for the namespace and repository before running the lookup.
When this happens · Trigger
Do this · Action
Supported Triggers and Actions
Notis builds workflows that link Slack to Docker hub. A trigger fires from one place; an action lands in another.
Slack triggers
Docker hub actions
Recurring trigger
Notis starts this workflow on a schedule, such as daily, weekly, or during business hours.
Add Organization Member
Tool to send an invitation for a user to join a Docker Hub organization. Use when you need to grant membership by inviting a user via their username after choosing the appropriate role.
Webhook trigger
Notis starts this workflow when an external tool or custom backend sends an HTTP request.
Create Docker Hub Organization
Tool to create a Docker Hub organization. Use when you need to programmatically instantiate a new namespace for organizing repositories.
New Channel Created Trigger
Triggered when a new channel is created in Slack.
Create Docker Hub Repository
Tool to create a Docker Hub repository under a namespace. Use when you need to programmatically instantiate a new repo under your organization or user.
Channel Message Received
Triggered when a message is posted in a Slack channel (public, private, or multi-party IM). Does NOT match direct messages.
Create Docker Hub Webhook
Tool to create a webhook on a Docker Hub repository. Use after determining repository details.
Direct Message Received
Triggered when a new direct message (DM) is sent to a user in Slack. Catches all DMs across all DM channels.
Delete Repository Image
Tool to delete a specific image within a Docker Hub repository. Use when you have confirmed the namespace, repository, and image ID to remove.
Message Reaction Added
Triggered when a reaction is added to a message in Slack. Supports optional filtering by channel and emoji name.
Delete Docker Hub Organization
Tool to delete a specific Docker Hub organization. Use when you need to permanently remove an organization. Deletion is irreversible.
Message Reaction Removed
Triggered when a reaction is removed from a message in Slack. Supports optional filtering by channel and emoji name.
Delete Docker Hub Repository
Tool to delete a specific Docker Hub repository. Use when you need to permanently remove a repository. Deletion is irreversible.
Reaction Added Trigger
DEPRECATED: use `SLACK_MESSAGE_REACTION_ADDED` instead. Triggered when a reaction is added to a message in Slack.
Delete Repository Tag
Tool to delete a specific tag from a Docker Hub repository. Use after confirming the tag to remove.
Connect any two apps with Notis in the middle.
Slack and Docker hub, or any other combination from 1,000+ integrations.
When this happens · Trigger
Do this · Action
Save your first hour today.
7-day trial of any paid plan, with 20$ of usage included.
No card. Works with personal or business Docker hub.