Fn supports grouping functions into a set that defines an application (or API), making it easy to organize and deploy.
This part is easy, just create an app.yaml file and put a name in it:
mkdir myapp2
cd myapp2
echo 'name: myapp2' > app.yaml
This directory will be the root of your application.
The root function will be available at / on your application.
fn init --runtime ruby
Now we have a Ruby function alongside our app.yaml.
Now let's create a sub route at /hello:
fn init --runtime go hello
Now we have two functions in our app--one directly in the root folder
and one in the hello folder. If you have the tree utility installed
run:
tree
This will show the structure we've created which looks like this:
.
├── Gemfile
├── app.yaml
├── func.rb
├── func.yaml
├── hello
│ ├── func.go
│ ├── func.yaml
│ └── test.json
└── test.jsonNow we can deploy the entire application with one command:
fn deploy --all --local
Once the command is done we can examine the structure of the myapp2
application. First we can get a list of deployed applications. The
fn apps command accepts either l or list to display the list of
applications:
fn apps list
You should see myapp2 in the list of deployed applications. We can
then list application's routes using the fn routes command:
fn routes l myapp2
If you have previously set the FN_REGISTRY registry environment variable
your Docker image names will be prefixed by it. Otherwise your output will look
like:
/ myapp2-root:0.0.2 localhost:8080/r/myapp2
/hello hello:0.0.2 localhost:8080/r/myapp2/hello
Once again l is a valid abbreviation for list followed by the name
of the application who's routes should be displayed. We can see there
are two routes / and /hello with two different Docker images
assocated with them.
Let's surf to our application. Open in a browser or use curl to call each of the functions.
- Root function at: http://localhost:8080/r/myapp2/
- And the hello function at: http://localhost:8080/r/myapp2/hello
Congratulations! In this tutorial you learned how to group functions into an application and deploy them with a single command.
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