# tye.yaml schema `tye.yaml` is the configuration file format for `tye`. This document describes briefly the set of supported configuration settings and elements. We also provide a JSON Schema which can be used by certain editors for completion and validation. See instructions [here](/src/schema/README.md). ### Example ```yaml name: myapplication services: - name: backend project: backend/backend.csproj bindings: - port: 7000 - name: frontend project: frontend/frontend.csproj replicas: 2 bindings: - port: 8000 - name: worker project: worker/worker.csproj - name: rabbit image: rabbitmq:3-management bindings: - port: 5672 protocol: rabbitmq ``` ### Terms **application**: The *whole* application, (usually) includes multiple services. Maps conceptually to a `tye.yaml` or a `.sln`. **service**: An individual project, container, or process. Part of an application. **project**: A kind of service, specified by a buildable and runnable .NET project. **container**: A kind of service that can be run locally using tye by launching a container using Docker. **executable**: A kind of service that the can be run locally using an arbitrary command-line. ## Root Element Properties ### Root Element Example ```yaml name: myapplication registry: exampleuser services: ``` ### Root Properties #### `name` (string) Configures the name of the application. This will appear in some Kubernetes labels right now, but not many other places. If the name name is not specified, then the lowercased directory name containing the `tye.yaml` file will be used as the default. #### `registry` (string) Allows storing the name of the container registry in configuration. This is used when building and deploying images for two purposes: - Determining how to tag the images - Determining where to push the images The registry could be a DockerHub username (`exampleuser`) or the hostname of a container registry (`example.azureci.io`). If this is not specified in configuration, interactive deployments will prompt for it. #### `services` (`Service[]`) *required* Specifies the list of services. Applications must have at least one service. ## Service `Service` elements appear in a list within the `services` root property. Services must be one of the following kind: - project - container - executable - external The kind will be inferred based on the properties that are set. Right now there is very little error checking or validation to help enforce this. ### Service Example ```yaml name: myapplication # services appear under this property services: # a project service - name: backend project: backend/backend.csproj bindings: - port: 7000 # a container service - name: rabbit image: rabbitmq:3-management bindings: - port: 5672 protocol: rabbitmq ``` ### Service Properties #### `name` (string) *required* The service name. Each service must have a name, and it must be a legal DNS name: (`a-z` + `_`). #### `project` (string) The relative path from `tye.yaml` to a `.csproj` or `.fsproj`. Including a `project` entry marks the service as a *project*: - It will build and run locally using the .NET project during development. - It will be packaged and deployed during deployments. #### `image` (string) The name and optional tag of an image that can be run using Docker. Including `image` marks the service as a *container*: - It will pulled and run locally using Docker during development. - It will not be deployed during deployment. #### `executable` (string) The path (or filename) of an executable to launch. Including `executable` marks the service as an *executable*: - It will run locally during development. - It will not be deployed during deployment. #### `external` (bool) Including `external: true` marks the service as *external*: - It will not run anything locally during development. - It will not be deployed during deployment. External services are useful to provide bindings without any run or deployment behavior. #### `env` (`EnvironmentVariable[]`) A list of environment variable mappings for the service. Does not apply when the service is external. #### `args` (string) Command-line arguments to use when launching the service. Does not apply when the service is external. #### `replicas` (integer) The number of replicas to create. Does not apply when the service is external. #### `build` (bool) Whether to build the project. Defaults to `true`. Only applies when the service is a project. #### `workingDirectory` (string) The working directory to use when launching. Only applies when the service is an executable. #### `bindings` (`Binding[]`) A list of bindings *exposed* by the service. Bindings represent protocols *provided* by a service. ## Environment Variables `EnvironmentVariable` elements appear in a list inside the `env` property of a `Service`. ### Environment Variable Example ```yaml name: myapplication services: - name: backend project: backend/backend.csproj # environment variables appear here env: - name: SOME_KEY value: SOME_VALUE ``` ### Environment Variable Properties #### `name` (string) *required* The name of the environment variable. #### `value` (string) *required* The value of the environment variable. ## Bindings `Binding` elements appear in a list inside the `bindings` property of a `Service`. Bindings represent protocols *exposed* by a service. How bindings are specified can affect both: - How a project is run. - How [service discovery](/docs/reference/service_discovery.md) is performed. Bindings should either provide: - A `connectionString` - A `protocol` - A `port` ### Binding Example ```yaml name: myapplication - name: rabbit image: rabbitmq:3-management # bindings appear here bindings: - port: 5672 protocol: rabbitmq ``` ### Binding Properties #### `name` (string) The name of the binding. Binding names are optional and should be omitted when a service contains a single binding. If a service provides two or more bindings, then they all must have names. Names are part of the [service discovery](/docs/reference/service_discovery.md) protocol. #### `connectionString` (string) The connection string of the binding. Connection strings should be used when connecting to the binding requires additional information besides a URL. [Service discovery](/docs/reference/service_discovery.md) treats connection string as a single opaque value and will ignore other properties like `port`. As an example, connecting to a hosted redis using authentication requires a URL as well as username and password. Using a connection string is typical for databases or anything that requires authentication. #### `protocol` (string) Specifies the protocol used by the binding. The protocol is used in [service discovery](/docs/reference/service_discovery.md) to construct a URL. It's safe to omit the `protocol` when it's not needed to connect to the service. As an example, connecting to redis without authentication only requires a hostname and port. #### `host` (string) Specifies the hostname used by the binding. The protocol is used in [service discovery](/docs/reference/service_discovery.md) to construct a URL. It's safe to omit the `host` when localhost should be used for local development. #### `port` (string) Specifies the port used by the binding. The port is used in [service discovery](/docs/reference/service_discovery.md) to construct a URL. #### `internalPort` (string deprecated, use containerPort instead) Specifies the port used by the binding when running in a docker container. #### `containerPort` (string) Specifies the port used by the binding when running in a docker container. #### `autoAssignPort` (bool deprecated, by default a port will be auto assigned if no connection string was specified) Specifies that the port should be assigned randomly. Defaults to `false`. This is currently only useful for projects - where the tye host will automatically infer bindings with `autoAssignPort: true` ## Volumes `Volume` elements appear in a list inside the `volumes` property of a `Service`. Each volume specifies the local files or directories should be mapped into the docker container. ### Volumes Example ```yaml name: myapplication - name: nginx image: nginx # volumes appear here volumes: - source: config/nginx.conf target: /etc/nginx/conf.d/default.conf ``` ### Volume Properties #### `source` (string) The local path. ### `name` (string) A named docker volume. #### `target` (string) *required* The destination path within the container.