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Capistrano Slack

Install

Best way to install Capistrano Slack intergration is via Bundler.

Add the following to your Gemfile, then run the bundle command to install the gem direct from the git repository

gem 'capistrano-slack', git: 'https://github.com/nextupdate/capistrano-slack'

Once installed you can use the settings below in your Capistrano deploy.rb to configure Slack.

Push deployment messages to Slack

require 'capistrano/slack'

# required
set :slack_token, "webhook_token" # comes from inbound webhook integration
set :slack_room, "#general" # the room to send the message to
set :slack_subdomain, "example" # if your subdomain is example.slack.com

# optional
set :slack_application, "Application Name" # override Capistrano `application`
set :slack_username, "Deploy Bot" # displayed as name of message sender
set :slack_emoji, ":cloud:" # will be used as the avatar for the message

You can obtain your webhook_token from the integrations section of the team page in Slack.

https://subdomain.slack.com/services/new/incoming-webhook (if your subdomain is subdomain.slack.com)

Run Smoke Tests after Deployment

You can also configure it to check provided URLs for expected status codes after a release and include the results with the post-deployment slack notification as attachments.

There are two ways to run the smoke tests.

Option 1 (Simple)

Just set run_smoke_test to true, and it will use your Capistrano application and domain variables to automatically check for a 200 status code at http://{domain}.

set application: "My Fancy App"
set domain: "example.com"

# optional
set :run_smoke_test, true # Defaults to false

Option 2 (Advanced)

Specify a set of URLs and expected status codes. For instance, you may want to check static or cached content in addition to a dynamic page.

With this approach, it defaults to expecting a 200, so you don't have to provide expected_status_code unless you expect a result other than 200.

Currently, if you have a multi-stage environment and set your domain in there, you'll probably need to setup the urls_to_test in your environment deploy files.

endpoints = [
  {
    name: "Public",
    url: "https://#{domain}"
  },
  {
    name: "Application",
    url: "https://#{domain}/login",
    expected_status_code: 404
  }
]

set :urls_to_test, endpoints

Handling Basic Authentication

If you have an environment that's behind basic auth, you can use the smoke_test_auth variable to provide the relevant values for the curl request.

set :smoke_test_auth, "username:password"

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Capistrano slack integration.

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