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HOWTO run IronFunction in Kubernetes at AWS

Prerequisite 1: it assumes you have a working Kubernetes, and a locally configured kubectl.

Prerequisite 2: It assumes you are using Kubernetes 1.4 or newer.

Quickstart

Steps

  1. Start IronFunction in the Kubernetes cluster:
$ cd docs/
$ kubectl create -f kubernetes-quick
  1. Once the daemon is started, check where it is listening for connections:
# kubectl describe svc functions

Name:			functions
Namespace:		default
Labels:			app=functions
Selector:		app=functions
Type:			LoadBalancer
IP:			10.0.116.122
LoadBalancer Ingress:	a23122e39900111e681ba0e29b70bb46-630391493.us-east-1.elb.amazonaws.com
Port:			<unset>	8080/TCP
NodePort:		<unset>	30802/TCP
Endpoints:		10.244.1.12:8080
Session Affinity:	None
Events:
  FirstSeen	LastSeen	Count	From			SubobjectPath	Type		Reason			Message
  ---------	--------	-----	----			-------------	--------	------			-------
  22m		22m		1	{service-controller }			Normal		CreatingLoadBalancer	Creating load balancer
  22m		22m		1	{service-controller }			Normal		CreatedLoadBalancer	Created load balancer

Note a23122e39900111e681ba0e29b70bb46-630391493.us-east-1.elb.amazonaws.com in LoadBalancer Ingress line, this is where the service is listening.

  1. Test the cluster:
$ export IRON_FUNCTION=$(kubectl get -o json svc functions | jq -r '.status.loadBalancer.ingress[0].hostname'):8080

$ curl -H "Content-Type: application/json" -X POST -d '{ "app": { "name":"myapp" } }' http://$IRON_FUNCTION/v1/apps
{"message":"App successfully created","app":{"name":"myapp","config":null}}

$ curl -H "Content-Type: application/json" -X POST -d '{ "route": { "type": "sync", "path":"/hello-sync", "image":"iron/hello" } }' http://$IRON_FUNCTION/v1/apps/myapp/routes
{"message":"Route successfully created","route":{"app_name":"myapp","path":"/hello-sync","image":"iron/hello","memory":128,"type":"sync","config":null}}

$ curl -H "Content-Type: application/json" -X POST -d '{ "name":"Johnny" }' http://$IRON_FUNCTION/r/myapp/hello-sync
Hello Johnny!

Production

Steps

  1. Start IronFunction and its dependencies:
$ cd docs/
$ kubectl create -f kubernetes-production

Optionally, you might have both Redis and PostgreSQL started somewhere else, in this case, remember to update kubernetes-production/functions-config.yaml with the appropriate configuration.

  1. Once the daemon is started, check where it is listening for connections:
# kubectl describe svc functions

Name:			functions
Namespace:		default
Labels:			app=functions
Selector:		app=functions
Type:			LoadBalancer
IP:			10.0.116.122
LoadBalancer Ingress:	a23122e39900111e681ba0e29b70bb46-630391493.us-east-1.elb.amazonaws.com
Port:			<unset>	8080/TCP
NodePort:		<unset>	30802/TCP
Endpoints:		10.244.1.12:8080
Session Affinity:	None
Events:
  FirstSeen	LastSeen	Count	From			SubobjectPath	Type		Reason			Message
  ---------	--------	-----	----			-------------	--------	------			-------
  22m		22m		1	{service-controller }			Normal		CreatingLoadBalancer	Creating load balancer
  22m		22m		1	{service-controller }			Normal		CreatedLoadBalancer	Created load balancer

Note a23122e39900111e681ba0e29b70bb46-630391493.us-east-1.elb.amazonaws.com in LoadBalancer Ingress line, this is where the service is listening.

  1. Test the cluster:
$ export IRON_FUNCTION=$(kubectl get -o json svc functions | jq -r '.status.loadBalancer.ingress[0].hostname'):8080

$ curl -H "Content-Type: application/json" -X POST -d '{ "app": { "name":"myapp" } }' http://$IRON_FUNCTION/v1/apps
{"message":"App successfully created","app":{"name":"myapp","config":null}}

$ curl -H "Content-Type: application/json" -X POST -d '{ "route": { "type": "sync", "path":"/hello-sync", "image":"iron/hello" } }' http://$IRON_FUNCTION/v1/apps/myapp/routes
{"message":"Route successfully created","route":{"app_name":"myapp","path":"/hello-sync","image":"iron/hello","memory":128,"type":"sync","config":null}}

$ curl -H "Content-Type: application/json" -X POST -d '{ "name":"Johnny" }' http://$IRON_FUNCTION/r/myapp/hello-sync
Hello Johnny!