added fission example doc

docs/tutorials/fission.md

@@ -0,0 +1,81 @@
+This document shows how to access your Fission functions securly via Gloo. We will deploy everything
+to minikube. With minor adjustments can be applied to any kubernets cluster.
+
+# Deploy Fission & Gloo
+The official Fission install guide is here: https://docs.fission.io/0.6.0/installation/installation/
+
+Setting up kubernetes: https://docs.fission.io/0.6.0/installation/kubernetessetup/
+
+
+To install gloo, run:
+```
+kubectl apply -f https://raw.githubusercontent.com/solo-io/gloo-install/master/kube/install.yaml
+```
+
+# Deploy Function
+
+Let's deploy an example function: this can also be found on the install guide, here: https://docs.fission.io/0.6.0/installation/installation/#run-an-example
+
+```
+fission env create --name nodejs --image fission/node-env
+curl -LO https://raw.githubusercontent.com/fission/fission/master/examples/nodejs/hello.js
+fission function create --name hello --env nodejs --code hello.js
+fission function test --name hello
+```
+
+With in a minute or so, you will see a function added to the gateway upstream:
+```
+$ glooctl upstream get fission-router-80
++-------------------+------------+----------+----------+
+|       NAME        |    TYPE    |  STATUS  | FUNCTION |
++-------------------+------------+----------+----------+
+| fission-router-80 | kubernetes | Accepted | hello    |
++-------------------+------------+----------+----------+
+
+```
+
+# Secure Access
+Lets provide secure access for it!
+
+create a pair of ssl certs. make sure to provide a Common Name when creating the certificate, 
+envoy will reject a certificate without one:
+```
+openssl req -x509 -newkey rsa:4096 -keyout server.key -out server.cert -days 365 -nodes
+```
+
+Add the certificates as secrets to kubernetes (this makes them available to gloo):
+```
+glooctl secret create certificate --name gloo-secure -c server.cert -p server.key
+```
+
+Configure gloo's default virtual host to route to the function and use the certificates:
+```
+$ cat <<EOF | glooctl virtualhost create -f -
+name: default
+routes:
+- request_matcher:
+    path_exact: /hello
+  single_destination:
+    function:
+        upstream_name: fission-router-80
+        function_name: hello
+ssl_config:
+  secret_ref: gloo-secure
+EOF
+```
+
+
+# Test!
+
+Get gloo's SSL endpoint:
+```
+HTTPS_GW=https://$(kubectl get po -l gloo=ingress -n gloo-system -o 'jsonpath={.items[0].status.hostIP}'):$(kubectl get svc ingress -n gloo-system -o 'jsonpath={.spec.ports[?(@.name=="https")].nodePort}')
+```
+
+Invoke the function:
+```
+$ curl --cacert server.cert -k $HTTPS_GW/hello
+Hello, world!
+```
+
+Your function will respond and say hi!