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Building Your First Fleet with Low-Code Library Blueprints


In this tutorial, you'll walk through the steps required to set up a very simple Fleet that contains two Vessels.

  • A Vessel, built with a Blueprint, that downloads a CSV file from a website
  • A Vessel, built with a Blueprint, that emails the contents of the CSV file.

By the end of the tutorial, you will know how to:

  • Set up a Vessel with a Blueprint
  • Connect Vessels together as part of a Fleet
  • Use a Fleet to access files created upstream


Step 1 - Accessing the Fleet Builder​

Using the sidebar, click on New Fleet to begin building your new Fleet.

Step 2 - Building the Fleet​

There are two options for creating a new Fleet: The Visual editor and the YAML editor. This tutorial will focus on using the Visual method. The YAML Editor will be addressed in a different set of tutorials.

Build Vessel to Download File via HTTP​

  1. Navigate down to the HTTP dropdown and click it. It will expand the Blueprints that are available to use for HTTP.

  2. Click the Blueprint named Download File from URL to Shipyard. This creates a new Vessel and immediately opens the edit pane for that Vessel on the left side of the screen.

  3. Next to the HTTP icon, click the pencil icon and remove the automatically generated name and type Download Slinky Dog Dash Ride Data.

  4. In the File URL field type

  5. In the File Name field type slinky_dog_dash.csv

  6. In the Folder Name field type disney_world_wait_times

Build Vessel to Email a File​

  1. Go to the canvas by clicking off the edit pane.
  2. + Add Vessel to add another Vessel to the Fleet.
  3. Search for email using the search bar at the top. Click on Send Message with File

Email Blueprint Options

  1. Next to the Email icon, click the pencil icon and remove the automatically generated name and type Send Slinky Dog Dash Data via Email.
  2. Fill out fields with the following values:
Send MethodTLS
SMTP Port587
UsernameLeave blank and use the default
PasswordLeave blank and use the default
Sender AddressLeave blank and use the default
Sender Name
SubjectSlinky Dog Dash Wait Times
MessageHere's the most recent wait times for Slinky Dog Dash!
File Name Match TypeExact
File Nameslinky_dog_dash.csv
Folder Namedisney_world_wait_times
Include Shipyard Footer?βœ…
  1. Click and drag from a circle on the Download Slinky Dog Dash Ride Data Vessel towards a circle on the Send Slinky Dog Dash Data via Email Vessel.

Connect Vessels


It is possible that the Vessels are stacked on top of each other or placed in a spot that is not visually pleasing. You can always drag Vessels by holding your left mouse click button on the Vessel and moving it wherever you would like.


This will connect the two Vessels, allowing one to be triggered by the other. Additionally, this allows files created upstream (Download Slinky Dog Dash Ride Data) to be accessed by the Vessel that lives downstream (Send Slinky Dog Dash Data via Email).

Step 3 - Update Fleet Name​

  1. Click on the pencil icon in the header and rename your Fleet to Download File from Webpage and Email to User.

    Notice that the "Default" project is pre-selected.

  2. Click the Save & Finish button at the bottom. You should now see the following screen:

Fleet Success Screen


By default, every Fleet and every Vessel you create will send error notifications to your email. You can always update this as needed.


After a Vessel is added to a Fleet and saved, the project cannot be changed. Always make sure that the proper project is selected when creating a new Fleet

Step 4 - Running the Fleet On Demand​

  1. On the success page, click the Run your Fleet button.

  2. You'll be redirected to a Fleet Log page as your Fleet runs. This page will refresh automatically as the Fleet runs. Wait until you see both Vessels as green bars, indicating that they completed successfully.

  3. Click on the Log ID or the bar graph for the Download Slinky Dog Dash Ride Data Vessel. Your Log ID will be different than the one shown below.

Click on a Log

  1. In the output, you should be able to see that the file was successfully downloaded and the size of the downloaded file.

Successful Log Output

  1. Go check your email. You should also see a message that contains the ride data.

Successful Email


You've successfully created and verified a Fleet that shares files between two Vessels built with a Blueprint!


A Fleet can always be run by clicking the Run Now button on the top right corner of the Fleet builder.

Further Experimentation​

Now that you've got the basics down, experiment on your own with a few changes to make sure you understand how Fleets allow Vessels to share files. Some suggestions to get you started:

  1. Create an additional Vessel that downloads the ride times from a different ride. How will you need to set this up to ensure both files get uploaded in the same email?
  2. Create an intermediary Vessel that renames the file after Download Slinky Dog Dash Ride Data and before Send Slinky Dog Dash Data via Email. How will you need to adjust things to ensure that Send Slinky Dog Dash Data via Email run successfully? How about if you create the file in a directory?
  3. Use the Slack blueprint called Send Message to send a message saying that the download the email process completed successfully.
  4. Create a Vessel using a Blueprint from the Blueprint Library that uploads the file to your storage solution of choice (S3, Google Cloud Storage, Dropbox, etc.) at the same time the email delivers. Can you successfully get the file delivered to your own storage solution?