Pipelines for Applications

This tutorial will get you setup and deploying a simple Bash application with Pipelines for Applications.

Before you begin, complete the following prerequisites:

The scenario also expects that you have a Destination server available to do deployments of the example application.

1. Cloning an Application

In this step, you’ll clone a sample application from Puppet Pipelines public GitHub repository. These steps should be completed on the Development server where you installed the Pipelines CLI. Enter the following command to clone the sample Bash application from GitHub:

Clone a sample app repo from GitHub to your local machine:

git clone https://github.com/Distelli/BashSimpleApp.git

Then, CD into the sample repo:

cd BashSimpleApp

2. Inspecting the Manifest File

The Pipelines Manifest file provides the Pipelines Platform with the needed information to successfully deploy your application. This file must exist before pushing your application to Puppet Pipelines. The sample application you cloned will already have an existing distelli-manifest.yml file in the application root directory. You will need to make a small change to this file before you can push the application up to Pipelines. Edit the distelli-manifest.yml file. On the first line you will see a <username> placeholder, and then the name of the sample application. Replace the <username> placeholder with your Pipelines username. For example if your username is ‘YourUserName’ your distelli-manifest.yml should look like this:

  # This Basic Pipelines Manifest has no
  # destination requirements.


    - exec ./simplebash.sh

    - simplebash.sh

Note: In .yml (YAML format) files, correct indentation is important.

3. Creating a Version of the Application on Pipelines

In this step, you’ll create a remote version of your application on Pipelines using the distelli create command. You need to create the application only one time. After that you can push the application, and subsequent versions, up to Pipelines. To create an application in Pipelines, enter the following command replacing YourUserName with your Pipelines username:

distelli create YourUserName/BashSimpleApp

Note: The application name must match the application name in the Pipelines Manifest.*,

4. Pushing your First Version

In this step, you’ll push your first application version to Pipelines using the distelli push command. Enter the following command in the terminal:

distelli push -m "Initial Release of BashSimpleApp"

Pushing App: BashSimpleApp
Uploading Bundle: [==========] 100%

Creating Release... DONE

Note: Just as it is important to have a succinct comment for software repository checkins, it is best-practice to include a relevant message when pushing or deploying your application up to Pipelines.

5. Creating an Environment

When you deploy an application with Pipelines, you can deploy the application to an Environment which may contain one or more servers. You can imagine this in relation to the Software Development Life Cycle where you have several environments which may include; Dev, Test, Staging, and Production. And each of these environments may have 1 or more servers. In this step, you’ll create an environment and add the destination server. To do this:

  1. Login to the Pipelines web UI.
  2. Click the BashSimpleAppp application name.
  3. Click the Environments link.
  4. Click the Create Environment button.
  5. Enter the Name Stage-bash.
  6. Click Create Environment.

You have just created an environment named Stage-bash.

  1. Click the Servers link.
  2. Click Add Servers link.
  3. Select the Add Server checkbox for the server you installed the agent on.
  4. Click the Add Selected Servers link.

You have added server(s) to the environment.

6. Deploying your Release

In this step, you’ll deploy your release to the Stage-bash environment which includes your destination server. On the development server where you installed the Pipelines CLI and the sample application ensure you are in the BashSimpleApp root directory where the Pipelines Manifest file is and use the distelli deploy command.

distelli deploy BashSimpleApp -m "Initial Release" -e Stage-bash

Note: Environment names are case sensitive.

7. Validation

During the deployment you will see Deployment In Progress messages and when it is complete you should see:

Deployment ##### Done: [=         ] Servers: 1 Done, 0 In Progress, 0 Failed

This application only outputs to stdout, so you will have to look at the stdout log in the Pipelines web UI. To do so, sign in to the the Pipelines web UI and navigate to your BashSimpleApp application and select the Deployments icon.

Here, at the top of the list, you will see your Deployment #####. Select it.

On the Deployment page click the Stdout button. This Bash script outputs the Server Time every 8 seconds for 10 iterations and then it will exit. When executing an application using the Exec: section in the distelli-manifest.yml file, if the application stops, Pipelines will automatically relaunch the application. To avoid this behavior, try editing the distelli-manifest.yml file and change the section header Env: to Start: and watch the View Log instead of the Stdout.

Next Steps

Try adding more servers to the Stage-bash environment and do a deploy to Stage-bash. You will see the deployment will go to all servers in the environment.

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