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README.md
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@ -12,20 +12,20 @@ Minimum requirements:
* Docker 1.13-RC (to support attachable overlay networks) * Docker 1.13-RC (to support attachable overlay networks)
* At least a single host in Swarm Mode. (run `docker swarm init`) * At least a single host in Swarm Mode. (run `docker swarm init`)
* Create an attachable network for the gateway and functions to join #### Create an attachable network for the gateway and functions to join
``` ```
# docker network create --driver overlay --attachable functions # docker network create --driver overlay --attachable functions
``` ```
* Start the gateway #### Start the gateway
``` ```
# docker pull alexellisio/faas-gateway:latest # docker pull alexellisio/faas-gateway:latest
# docker rm -f gateway; docker run -d -v /var/run/docker.sock:/var/run/docker.sock --name gateway -p 8080:8080 --network=functions alexellisio/faas-gateway:latest # docker rm -f gateway; docker run -d -v /var/run/docker.sock:/var/run/docker.sock --name gateway -p 8080:8080 --network=functions alexellisio/faas-gateway:latest
``` ```
* Start at least one of the serverless functions: #### Start at least one of the serverless functions:
Here we start an echo service using the `cat` command found in a shell. Here we start an echo service using the `cat` command found in a shell.
@ -33,30 +33,30 @@ Here we start an echo service using the `cat` command found in a shell.
# docker service rm catservice ; docker service create --network=functions --name catservice alexellisio/faas-catservice:latest # docker service rm catservice ; docker service create --network=functions --name catservice alexellisio/faas-catservice:latest
``` ```
* Now send an event to the API gateway #### Now send an event to the API gateway
**Method 1 - use the service name as a URL:** * Method 1 - use the service name as a URL:
``` ```
# curl -X POST --data-binary @$HOME/.ssh/known_hosts -v http://localhost:8080/function/catservice # curl -X POST --data-binary @$HOME/.ssh/known_hosts -v http://localhost:8080/function/catservice
``` ```
**Method 2 - use the X-Function header:** * Method 2 - use the X-Function header:
``` ```
# curl -X POST -H 'x-function: catservice' --data-binary @$HOME/.ssh/known_hosts -v http://localhost:8080/ # curl -X POST -H 'x-function: catservice' --data-binary @$HOME/.ssh/known_hosts -v http://localhost:8080/
``` ```
* Build your own function #### Build your own function
Visit the accompanying blog post to find out how to build your own function in whatever programming language you prefer. Visit the accompanying blog post to find out how to build your own function in whatever programming language you prefer.
[FaaS blog post](http://blog.alexellis.io/functions-as-a-service/) [FaaS blog post](http://blog.alexellis.io/functions-as-a-service/)
## Overview # Overview
## the gateway
gateway
=======
This container acts in a similar way to the API Gateway on AWS. Requests can be made to this endpoint with a JSON body. This container acts in a similar way to the API Gateway on AWS. Requests can be made to this endpoint with a JSON body.
@ -75,8 +75,8 @@ Features:
* [todo] unique URL routes for serverless functions * [todo] unique URL routes for serverless functions
* instrumentation via Prometheus metrics at GET /metrics * instrumentation via Prometheus metrics at GET /metrics
watchdog ## the watchdog
========
This binary fwatchdog acts as a watchdog for your function. Features: This binary fwatchdog acts as a watchdog for your function. Features:
@ -86,8 +86,7 @@ This binary fwatchdog acts as a watchdog for your function. Features:
* [todo] Only lets processes run for set duration i.e. 500ms, 2s, 3s. * [todo] Only lets processes run for set duration i.e. 500ms, 2s, 3s.
* Language/binding independent * Language/binding independent
Building a development environment: ## Building a development environment:
===================================
To use multiple hosts you should push your services (functions) to the Docker Hub or a registry accessible to all nodes. To use multiple hosts you should push your services (functions) to the Docker Hub or a registry accessible to all nodes.
@ -112,8 +111,6 @@ Accessing the `cat` (read echo) service:
# curl -X POST -H 'x-function: catservice' --data-binary @/etc/hostname -v http://localhost:8080/ # curl -X POST -H 'x-function: catservice' --data-binary @/etc/hostname -v http://localhost:8080/
``` ```
Prometheus metrics / instrumentation ## Prometheus metrics / instrumentation
====================================
* Standard go metrics and function invocation count / duration are available at http://localhost:8080/metrics/
Standard go metrics and function invocation count / duration are available at http://localhost:8080/metrics/