docs/app-template/api-reference.md

title	description	keywords
Docker Template API reference	Docker Template API reference	application, template, API, definition

This page contains information about the Docker Template API reference.

Service template definition

The following section provides information about the valid parameters that you can use when you create a service template definition.

apiVersion: v1alpha1
kind: ServiceTemplate
metadata:
 name: angular
 platforms:
   - linux
spec:
 title: Angular
 description: Angular service
 icon: https://cdn.worldvectorlogo.com/logos/angular-icon-1.svg
 source:
   image: docker.io/myorg/myservice:version
 parameters:
 - name: node
   description: Node version
   type: enum
   defaultValue: "9"
   values:
   - value: "10"
     description: "10"
   - value: "9"
     description: "9"
   - value: "8"
     description: "8"
 - name: externalPort
   description: External port
   defaultValue: "8080"
   type: hostPort

root

Parameter	Required?	Description
apiVersion	yes	The api format version. Current latest is v1alpha1
kind	yes	The kind of object. Must be ServiceTemplate For services templates.

metadata

Parameter	Required?	Description
name	yes	The identifier for this service. Must be unique within a given library.
platform	yes	A list of allowed target platforms. Possible options are windows and linux

spec

Parameter	Required?	Description
title	yes	The label for this service, as displayed when listed in docker template commands or in the application-designer
description	no	A short description for this service
icon	no	An icon representing the service. Only used in the Application Designer

spec/source

Parameter	Required?	Description
image	yes	The name of the image associated with this service template. Must be in full repo/org/service:version format

spec/parameters

The parameters section allows to specify the input parameters that are going to be used by the service.

Parameter	Required?	Description
name	yes	The identifier for this parameter. Must be unique within the service parameters.
description	no	A short description of the parameter. Will be used as label in the Application Designer
type	yes	The type of the parameter. Possible options are: string - The default type, with no validation or specific features. enum - Allow the user to choose a value included in a specific list of options. Must specify the values parameter. hostPort - Specify that this parameter is a port that is going to be exposed. Use port format regexp validation, and avoid duplicate ports within an application.
defaultValue	yes	The default value for this parameter. For enum type, must be a valid value from the values list.
values	no	For enum type, specify a list of value with a value/description tuple.

Application template definition

The following section provides information about the valid parameters that you can use when you create a application template definition.

apiVersion: v1alpha1
kind: ApplicationTemplate
metadata:
 name: nginx-flask-mysql
 platforms:
   - linux
spec:
 title: Flask / NGINX / MySQL application
 description: Sample Python/Flask application with an Nginx proxy and a MySQL database
 services:
 - name: back
   serviceId: flask
   parameters:
     externalPort: "80"
 - name: db
   serviceId: mysql
 - name: proxy
   serviceId: nginx

root

Parameter	Required?	Description
apiVersion	yes	The api format version. Current latest is v1alpha1
kind	yes	The kind of object. Must be ApplicationTemplate For application templates.

metadata

Parameter	Required?	Description
name	yes	The identifier for this application template. Must be unique within a given library.
platform	yes	A list of allowed target platforms. Possible options are windows and linux

spec

Parameter	Required?	Description
title	yes	The label for this application template, as displayed when listed in docker template commands or in application-designer
description	no	A short description for this service

spec/services

This section lists the service templates used in the application.

Parameter	Required?	Description
name	yes	The name of the service. It will be used for image name and for subfolder within the application structure.
serviceId	yes	The id of the service to use (equivalent to the metadata/name field of the service)
parameters	no	A map (string to string) that can be used to override the default values of the service parameters.

Service configuration file

The file is mounted at /run/configuration in every service template container and contains the template context in a JSON format.

Parameter	Description
ServiceId	The service id
name	The name of the service as specified by the application template or overridden by the user
parameters	A map (string to string) containing the service’s parameter values.
targetPath	The destination folder for the application on the host machine.
namespace	The service image’s namespace (org and user)
services	A list containing all the services of the application (see below)

Attributes

The items in the services list contains the following attributes:

Parameter	Description
serviceId	The service id
name	The name of the service as specified by the application template or overridden by the user
parameters	A map (string to string) containing the service’s parameter values.