Set up OpenFaaS
OpenFaaS is a functions platform, it stands for "Functions as a Service", but can also deploy microservices.
With function we mean a small and reusable piece of code that:
- is short-lived
- is not a daemon (long-running)
- is not stateful
- makes use of your existing services or third-party resources
- usually executes in a few seconds
There is a reach zoology of FaaS frameworks created to provide and to manage functions starting from the one developed by IaaS providers (e.g. AWS Lambda, Google Cloud Functions, Azure functions). There are also many open-source FaaS solutions (as you can see in the figure above) and for this hands-on we will make use of OpenFaaS.
Install OpenFaaS on Kubernetes
sudo kubectl apply -f https://raw.githubusercontent.com/openfaas/faas-netes/master/namespaces.yml # generate a random password PASSWORD=$(head -c 12 /dev/urandom | shasum| cut -d' ' -f1) sudo kubectl -n openfaas create secret generic basic-auth \ --from-literal=basic-auth-user=admin \ --from-literal=basic-auth-password="$PASSWORD" echo $PASSWORD > gateway-password.txt git clone https://github.com/openfaas/faas-netes cd faas-netes && \ sudo kubectl apply -f ./yaml
After few minutes you should be able to go to
http://127.0.0.1:31112 to start browsing the OpenFaas WebUI.
curl -sL cli.openfaas.com | sudo sh
$ faas-cli help $ faas-cli version export OPENFAAS_URL=http://127.0.0.1:31112 echo -n $PASSWORD | faas-cli login --password-stdin