Orchestrating Microservices with AKS

@kokkisajee

Sajeetharan Sinnathurai

Quantum Hack,Nepal 2020| www.sajeetharan.com

THE CHALLENGE

"Build Serveless functions for AKS with OpenFaas"

Do sentiment analysis with OpenFass store function
Build custom function to send a tweet

THE CHALLENGE!

and we need only 30 steps to go there!

Micro-service architecture?

Serverless !== No Server

Event Driven

Stateless

Microservices

Why serverless?

👍 Reduce time-to-market

👍 Easier deployment

👍 Scale automatically

👍 Focus on business logic

👍$$$ Reduction

When to use?

👍 Stateless

👍 Short Job

👍 Event-driven stuff, e.g. Time-based / webhook

👍 Simple application with less dependency

Kubernetes is a portable, extensible open-source platform for managing containerized workloads and services, that facilitates both declarative configuration and automation

Packing Things Together

At Scale

Faas Model/Patterns

Short Lived

No ports

No states

Serves single purpose

Frameworks for serverless

OpenFaas Revolution is here

"Serverless Functions Made Simple"

Anything can be a function
Leverage existing skills in teams
Avoid vendor lock-in
Run anywhere - cloud or on-prem
13,000 stars more than anyone else

OpenFaas Architecture

What languages does it support?

Any

Let's fight together

PreRequisites

Azure Subscription

Docker installed locally and a docker hub account

Install docker for windows / Enable HyperV

Docker hub account

Python installed locally

Install python for windows

Access to guideliness

https://slides.com/sajeetharansinnathurai/openfaas/

Twitter Account

Let's Kick Off

Step 1: Launch Azure Cloud shell or Install Azure CLI

https://shell.azure.com/bash

Step 2: Run the login command or login https://aka.ms/devicelogin

az login -u <username> -p <password>

Step 3: Create a resource group

 az group create --name aksColomboRG --location eastus

Step 4: Create AKS cluster

az aks create  --resource-group aksColomboRG  --name openFaasCluster --node-vm-size Standard_A2_v2   --node-count 1 --enable-addons monitoring --generate-ssh-keys

Step 6: Connect to the cluster

Step 7: List the cluster nodes

az aks get-credentials --resource-group aksColomboRG --name openFaasCluster --admin -a  --overwrite-existing

kubectl get all -n kube-system

Congratulations

Step 8: Install and Init Helm

Step 9: Install OpenFaas

Step 10: Create namespace OpenFaas

Step 11: Create second namespace for OpenFass Functions

Step 12 : Check you have a tiller pod in ready state

helm init --upgrade

git clone https://github.com/openfaas/faas-netes

kubectl create ns openfaaskubectl

kubectl create ns openfaas-fn

kubectl -n kube-system get po

Step 13: Manually start the tiller

Step 14: Resolve cannot list configmaps in the "kube-s"

kubectl create serviceaccount --namespace kube-system tiller
kubectl create clusterrolebinding tiller-cluster-rule --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
kubectl patch deploy --namespace kube-system tiller-deploy -p '{"spec":{"template":{"spec":{"serviceAccount":"tiller"}}}}'      
helm init --service-account tiller --upgrade

kubectl logs --namespace kube-system tiller-deploy-66cdfd5bc9-46sxv

Step 16: A Helm chart for OpenFaaS is included in the cloned repository. Use this chart to deploy OpenFaaS into your AKS cluster.

helm upgrade --install --namespace openfaas --set functionNamespace=openfaas-fn --set async=true --set serviceType=LoadBalancer openfaas openfaas/openfaas

Step 17: See OpenFaas live

kubectl get all -n openfaas

helm repo add openfaas https://openfaas.github.io/faas-netes/

You did it!

If Not

Deploy new Function from store

Deploy Custom function

Step 2: Install faas-cli

Step 3: Login to docker hub

docker login

Step 1: Run Docker Desktop

To install the faas-cli on Windows go to Releases and download the latest faas-cli.exe.

set OPENFAAS_URL=http://23.101.130.111:8080

Step 4: set OpenFaas url

Step 6: List the functions

faas-cli list

Step 7: Remove the function

faas-cli rm -f AKSdemo.yml

faas-cli up -f helloaks.yml

Step 6: Deploy the function

// Create Folder functions
mkdir functions

//Create new function named helloAKS
faas-cli new --lang=node --prefix=sajeetharan helloaks

Step 5: Create first function

Step 2: Get the twitter app for you

Step 3: Add the environment variables

provider:
  name: faas
  gateway: http://23.101.130.111:8080
functions:
  tweetme:
    lang: python
    handler: ./tweetme
    image: sajeetharan/tweetme:latest
    environment:
        consumer_key: "fdsr43eegegsdvsdfewfrewrewr"
        consumer_secret: "wefdsfsdtrewtgdsgds"
        access_token: "146725639-f"
        access_token_secret: "fsdfsfdffds"

Step 1: Create the function

faas-cli new --lang=python --prefix=sajeetharan tweetme

Let's create tweetme App

https://developer.twitter.com/en/apps

Step 6: Deploy the app

Step 4: Add dependency in the requirements.txt

tweepy

Let's create tweetme App

faas-cli up -f tweetme.yml

Step 5: handler.py

import os
import tweepy

def get_api(cfg):
    auth = tweepy.OAuthHandler(cfg['consumer_key'], cfg['consumer_secret'])
    auth.set_access_token(cfg['access_token'], cfg['access_token_secret'])
    return tweepy.API(auth)

def handle(tweet):
    cfg = { 
        "consumer_key"        : os.environ['consumer_key'],
        "consumer_secret"     : os.environ['consumer_secret'],
        "access_token"        : os.environ['access_token'],
        "access_token_secret" : os.environ['access_token_secret'] 
      }
    
    api = get_api(cfg)
    
    status = api.update_status(status=tweet)
    print('Tweet sent.')
    print(status)

Wake up! I'M done

https://github.com/sajeetharan/TweetMe-OpenFaas-AKS

https://github.com/sajeetharan/serverless-with-openfaas-aks-workshop-colombo

Where to go from here?

- Build more functions

- Send your queries @kokkisajee

- Be a part of ngSrilanka

- Rate the session

https://www.rateevent.com/speeches/SCAAA580

Explore by yourself and learn.

Orchestrating MicroServices with AKS - Nepal

By Sajeetharan Sinnathurai

Orchestrating MicroServices with AKS - Nepal

Orchestrating MicroServices with AKS

Sajeetharan Sinnathurai

Principal Product Manager with 13 years of experience in the software industry, including 4 years in product management and 9 years as a developer specializing in cloud platforms. I’m passionate about creating tools that empower developers

Orchestrating Microservices with AKS

THE CHALLENGE

"Build Serveless functions for AKS with OpenFaas"

THE CHALLENGE!

Micro-service architecture?

Serverless !== No Server

Why serverless?

When to use?

Packing Things Together

At Scale

Faas Model/Patterns

Frameworks for serverless

OpenFaas Revolution is here

"Serverless Functions Made Simple"

OpenFaas Architecture

What languages does it support?

Any

Let's fight together

PreRequisites

Let's Kick Off

Congratulations

You did it!

If Not

Deploy new Function from store

Deploy Custom function

Let's create tweetme App

Let's create tweetme App

Wake up! I'M done

Where to go from here?

Explore by yourself and learn.

Orchestrating MicroServices with AKS - Nepal

More from Sajeetharan Sinnathurai