On your slack channel, add the 'email integration' app. Once done, Slack will provide you an email address with slack.com domain. Emails sent to this address will be imported into your slack channel. Then, on SNS create an email subscription and provide the slack email above. In this blog post I will outline in detail how to create a Slack alarm channel for your service using AWS Cloudwatch, SNS, and the Slack email integration. The high level outline is as follows: Create channel in Slack for alarms; Add Slack email integration which assigns an email address to the alarm channel; Create an SNS topic for your alarms.
At Resolver, we aim to automate as much of the boring technical jobs as possible, and that includes the whole continuous integration (CI) and deployment pipeline. We trigger these from GitHub, so a mere push or merge can kick-off our automated test suite or deploy to our staging environment for more automated and manual testing.
Our deployment pipeline also happens to deploy the same artefacts that have been deployed to our staging environment to our production environment. The end goal is to be able to do this automatically, but for that to be viable, we need to have 100% trust in our testing strategy, and as with most organisations, we’re not there yet. Therefore, for the time being, we want to be able to pause the pipeline after the staging deployment, and manually approve it to continue to production.
With AWS CodePipeline, this step is easy. The product supports a manual approval stage, and we insert that into our pipleline as follows:
Sending notifications to Slack using the Chatbot Terraform module. To send notifications, for example, when an AWS CodePipeline project starts or finishes, we will create a SNS topic and configure Chatbot to map that SNS topic. Then, we create an awscodestarnotificationsnotificationrule that notifies the SNS topic when one of these events. A python library to send cloudwatch alarm notifications to Slack. Install the package. Pip install cloudwatchalarmtoslack It is expected this will be used as a part of a lambda. From cloudwatchalarmtoslack.entrypoint import CloudwatchAlarmNotifier def lambdahandler(event, context): CloudwatchAlarmNotifier.handleevent(event).
Most of the stage is pretty basic, but note the configuration block at the bottom. It refers to an SNS topic and a custom string. That’s where our custom alerts come into play.
Finding out when a deployment is pending
The downside of this automated deployment pipeline is that developers aren’t always aware of what’s happening in the background. One or more deployment may have occurred to the staging environment and may be pending a production deployment. How can we ensure developers are aware of this so deployments don’t get delayed?
This is where SNS comes to the rescue. SNS is a service that receives notifications from various sources and can carry out an action on each receipt. The approval CodePipeline stage supports notifying an SNS topic (a way of separating different notification types and their appropriate actions) each time the stage is triggered. SNS in turn supports triggering a Lambda function each time a notification is received. Putting those features together, we can come up with a solution that posts alerts to a predefined Slack channel each time a production deployment is pending. That way, everyone can see this and act on it.
Creating a Lambda function
We start by defining a Lambda function that will send a message to a given Slack channel:
This Terraform configuration takes a Lambda function that has been compressed into a Zip file. The Zip file contains a single file with the function, in any of the languages supported by Lambda. Here, we’ve defined NodeJS 12.x as the runtime and our function will be written in JavaScript as a result.
This function takes the message it receives from SNS and extracts some data, which it then assembles into an API call to send to a Slack endpoint URL. To get your unique URL, add a new incoming webhook in Slack.
Create this function in a file named the same as the Zip file that you’ll compress it into.
Also, remember to create the Lambda IAM role. This role will allow your Lambda function to log its output to CloudWatch, which is invaluable if it fails!
Setting up SNS
Now we have our CodePipeline and Lambda function, we need an SNS topic to link them together.
Here, we create an SNS topic, we link it to the Lambda function using a “subscription”, and we give the Lambda function the permission to be called from the SNS topic.
The SNS role is similar to the Lambda role and just allows it to write logs to CloudWatch.
Seeing it in action
To test this out, kick-off your CodePipeline and wait for it to reach the manual approval step. Download sagem card reader driver. If everything’s worked as intended, you should see a message like the one below show up in the Slack channel you defined in the Lambda function earlier:
If you don’t see the message above, both Lambda and SNS send their logs to CloudWatch, so check there for any tell-tale failure messages. These are commonly to do with missing permissions or incorrect Slack API configuration.
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Introduction
This article explains how to link Trello, a useful task management tool, with Slack, a chat tool. Once you do that, you’ll be able to hack your Trello notifications, use Slack as a reminder, and more.
What is Trello?
Trello is a simple kanban task management tool.
You can use almost all functions for free.
This is a tool that allows you to manage tasks by moving tasks called lists and cards freely in a whiteboard-like space called a board.
How to Register Trello
You can register for Trello at the following official site.
Trello Official
Sns To Slacker
Trello’s strength is its ability to work with a variety of external tools through add-ons.
Trello features add-ons. You can customize Trello yourself by adding various add-ons.
It also works with Confluence, a wiki tool run by Atlassian.
Slack
Slack is a business chat tool and one of the fastest growing services.
Slack can also dramatically increase productivity by collaborating with a variety of external tools.
Slack Official
How Trello and Slack work together
Next driver. Here’s how Trello and Slack work together.
Trello and Slack work together in two broad patterns.
#1 Works with the Trello app
You can add Trello to Slack by adding an app.
Run the Trello command in Slack. Basically, this is for those who want to use Slack as a main machine.
#2 Works with Trello Alerts
Slack is notified when Trello is updated. If you want to manage tasks in Trello main, this is for you.
Learn more about how Trello works
Let us explain #1. Click “+” next to App in the left menu of Slack My Page.
The application list is displayed. Search for Trello here.
You’ll see two apps. This time, click on Trello above.
This will take you to the Trello introduction page below.
Click the “Access and install the site” button.
Aws Sns Slack
Click “Add to Slack”
Shows the group of Trellos you want to work with.
Click to be prompted to sign in to the workspace.
After signing in to Slack, you’ll see a list of what you can do with the collaboration.
Click “Allow” after confirming each.
Once it’s working, you’ll see that Trello has sent a notification to Slack.
The message includes a link announcement and a tutorial on how to use it.
Slack commands allow you to perform various operations. The details are captured, but you can roughly do the following:.
- Create a new card and add it to the list
- Invite teammates to the board
- Learn more about cards and boards
- add a comment to a card
- put a time limit on a card
If you are in trouble, you can open the channel of TrelloBot and check the command list above.
Learn more about how Trello alerts work together
Here are the details of how Slack works with Trello alerts:.
Hit the “+” button from any Slack app to jump to the app list search screen.
From there, you can search for “Trello”. Trello alert appears.
Click “INSTALLATION”. Then, authentication and posting to the channel will be displayed. Click through each one. After authenticating the Trello account, specify the Slack channel.
Sns To Slack
When the message “Which Trello notifications do you want to show in Slack?” appears,
You can select a notification type from the checklist.
Scroll down to the bottom of the checklist and you’ll see the Save integration button. Click this button when you finish checking.
The message “Settings Saved” appears on the screen.
This completes the configuration.
I created a card called “TEST” and got a notification almost immediately.
And finally
This concludes our entry on how Trello and Slack work together.
It seems to be more efficient if I use them differently depending on my work style and compatibility.