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* Remove lots of refs to iron and funcy oracle etc.. * more ref replacements * Replacing more refs. Treeder * Use Fn not FN
91 lines
2.7 KiB
Markdown
91 lines
2.7 KiB
Markdown
# Fn Routes
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Routes have a many-to-one mapping to an [app](apps.md).
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A good practice to get the best performance on your Fn API is define
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the required memory for each function.
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## Route level configuration
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When creating a route, you can configure it to tweak its behavior, the possible
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choices are: `memory`, `type` and `config`.
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`memory` is number of usable MiB for this function. If during the execution it
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exceeds this maximum threshold, it will halt and return an error in the logs. It
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expects to be an integer. Default: `128`.
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`type` is the type of the function. Either `sync`, in which the client waits
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until the request is successfully completed, or `async`, in which the clients
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dispatches a new request, gets a call ID back and closes the HTTP connection.
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Default: `sync`.
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`config` is a map of values passed to the route runtime in the form of
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environment variables.
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Note: Route level configuration overrides app level configuration.
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TODO: link to swagger doc on swaggerhub after it's updated.
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## Understanding Fn memory management
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When Fn starts it registers the total available memory in your system
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in order to know during its runtime if the system has the required amount of
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free memory to run each function. Every function starts the runner reduces the
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amount of memory used by that function from the available memory register. When
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the function finishes the runner returns the used memory to the available memory
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register.
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### Creating function
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```
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curl -H "Content-Type: application/json" -X POST -d '{
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"route": {
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"path":"<route name>",
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"image":"<route image>",
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"memory": <memory mb number>,
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"type": "<route type>",
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"config": {"<unique key>": <value>}
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}
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}' http://localhost:8080/v1/apps/<app name>/routes
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```
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Eg. Creating `/myapp/hello` with required memory as `100mb`, type `sync` and
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some container configuration values.
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```
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curl -H "Content-Type: application/json" -X POST -d '{
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"route": {
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"path":"/hello",
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"image":"fnproject/hello",
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"memory": 100,
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"type": "sync",
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"config": {"APPLOG": "stderr"}
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}
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}' http://localhost:8080/v1/apps/myapp/routes
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```
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### Updating function
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```
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curl -H "Content-Type: application/json" -X POST -d '{
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"route": {
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"memory": <memory mb number>,
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"type": "<route type>",
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"config": {"<unique key>": <value>}
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}
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}' http://localhost:8080/v1/apps/<app name>/routes/<route name>
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```
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Eg. Updating `/myapp/hello` required memory as `100mb`, type `async` and changed
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container configuration values.
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```
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curl -H "Content-Type: application/json" -X POST -d '{
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"route": {
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"memory": 100,
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"type": "async",
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"config": {"APPLOG": "stdout"}
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}
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}' http://localhost:8080/v1/apps/myapp/routes/hello
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```
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