Using redeployment hooks
Overview
Redeployment hooks allow you to achieve continuous deployment by deploying your application whenever you push a change to your Git repository or when your continuous integration pipeline builds successfully.
Cloud 66 offers several methods for achieving continuous integration. Please read our continuous integration guide to compare and select the ideal method to suit your requirements.
Accessing redeployment hooks
A unique redeployment hook URL is automatically generated for each Cloud 66 application. To access it:
- Open the Application Overview from your Dashboard
- Click on Settings & Information in the Application panel on the right of the screen
- Click on the Information panel
You can use the Redeployment Hook URL to trigger automated deployments via your preferred Git or CI service.
Usage example
An example of a standard redeployment hook:
https://hooks.cloud66.com/stacks/redeploy/xxxx/yyyy
Note
The xxxx/yyyy in the examples is for illustrative purposes only and should be replaced with your redeployment URL on your Application Information page.
Services modifiers
You might have multiple services which rely on a combination of images or Git sources. Furthermore, the Git sources can be the same or different branches, or even completely different repositories.
To handle this you can append your redployment hook with a services modifier as a query string parameter.
Usage examples
An example redeployment hook with a single services modifier:
https://hooks.cloud66.com/stacks/redeploy/xxxx/yyyy?services=my-web-service
An example redeployment hook with a many-service modifier:
https://hooks.cloud66.com/stacks/redeploy/xxxx/yyyy?services=my-web-service,api
How service modifiers work
When a redeployment hook is invoked:
-
If the commit hook payload includes Git information (Git source, branch and/or reference) then we will attempt to find a matching service on your application that corresponds to this, and build that service. We will deploy only the services that have a Git type (not the image-based services).
-
If the commit hook payload does not include Git information, then we will automatically redeploy all services defined on your application.
-
If you use the services modifier to specify specific services to deploy, then the same logic applies as in 1) and 2) above, the only difference being that we will only deploy the services you have specified.
Note
In the case where the payload of the commit hook does not contain any branch information (Github and Bitbucket payload formats are supported) then the application will redeploy without attempting to match branch.
Calling a deployment profile via a redeployment hook
Deployment profiles allow you to customise the deployment process depending on your requirements - for example deploying some components and not others. You can also call deployment profiles directly via redeployment hooks using the following syntax:
https://hooks.cloud66.com/stacks/redeploy/xxxx/yyyy/?deployment_profile=name_of_deployment_profile
The name of the profile can be found via your app Dashboard under Settings & Information → Build & Deployment Profiles. If your deployment profile’s name has spaces in it, you should replace each space with either + or %20.
Github integration
Users who have signed in through Github (and who have enough access to create and edit deployment events for their applications on GitHub) can activate continuous deployments on GitHub.
To do this: access your Application settings via the toolbelt and set continuous.deploy to true.
$ cx settings set -s my_app_name continuous.deploy true
This will create a new webhook for your repository on GitHub or simply modify an existing one to let Cloud66 receive deployment events as well.
Warning
If you edit your webhooks manually on Github, they must be configured to be triggered by both Push and Deployment events in order for continuous deployment to work.
With this feature enabled, whenever you push a new commit, Cloud 66 will automatically generate a new deployment event based on receiving the push event from GitHub. We will also send deployment status events on different deployment statuses, such as started, canceled, succeeded and failed.
Note
The deployment event will be created with the same environment as your application.
Adding redeployment hooks to your pipeline
The process of adding the hook differs by Git host, so we will guide you through doing this with GitHub, Bitbucket and a generic solution.
GitHub Setup
On your Application Overview, click Settings & information in the right sidebar and then the Information tab. Then copy the URL provided in the Redeployment hook field.
Next, visit your GitHub repository, click Settings in the right sidebar, and then Webhooks & Services in the left sidebar.
In the Webhooks window, click Add webhook and paste the redeployment hook URL into the Payload URL field. When you confirm by clicking Add webhook, GitHub will automatically test your hook with a Ping and you should get a green HTTP200 response.
Bitbucket Setup
On your Application Overview, click Settings & information in the right sidebar and then the Information tab. Then copy the URL provided in the Redeployment hook field.
Next, visit your Bitbucket repository, click Settings in the left sidebar, and then Hooks in the settings menu that appears. In the Select a hook field, select a POST hook, click Add hook and paste your redeployment hook URL into the field provided. Click Save to confirm.
Generic Setup
Most Git providers have a commit hook mechanism that you can use to post to the Cloud 66 redeployment hook URL. Please check your Git provider documentation for this information. If your Git provider has a non-conforming payload format (not compatible with Github or BitBucket formats) then please get in touch and we can extend our payload support!
Invoking your redeployment hook manually
To invoke the redeployment hook manually, you can POST an HTTP request to your redeployment hook URL. You can do this in curl like this:
curl -X POST [your redeployment hook URL]
Note
If you are manually invoking redeployments you should consider using Cloud 66 Toolbelt instead, as it has additional features!
