ICP-Airways

Air-Line ticketing and booking application on IBM Cloud Private

Powered by IBM Cloud Private

Building an Airline Booking Application based on Microservices Architecture on IBM Cloud Private

Introduction

In this Code Pattern, we will build a cloud native application based on microservice architecture, IBM Middlewares and following 12 factor practices. This application is an Airline Booking app, and the technologies behind this app are:-

Nodejs (Typescript)
IBM DB2
IBM ODM
RabbitMQ
MariaDB
MongoDB
Here Map
Celery
Angular
Docker
Kubernetes
IBM Cloud Private
Istio
Calico

Cloud native application is a buzzword these days. Technologies like Kubernetes and Docker are picking up reputation and popularity in Cloud native world. This Pattern will show an end to end process of building highly available Cloud Native Application on IBM Cloud Private. The Application backend is based on Nodejs and DB2, MariaDB, and MongoDB as a Database. The frontend is built using Angular4. Distributed Asynchronous task queue is based on RabbitMQ and Celery. Container orchestration is managed by Kubernetes.

Learning objectives

When you've completed this Code Pattern, you will understand how to:

Break the application into different microservices
Deploying microservices based application on IBM Cloud Private
Leveraging IBM Middlewares such as ODM and DB2 on Kubernetes
Using Istio to build service mesh
Using Grafana, Prometheus, kiali, and Weavnet for visualisation
Securing kubernetes networking through Calico
Designing business rules and decision by IBM ODM
Create distributed task ques using RabbitMQ and Celery
Leveraging DB2, MariaDB, and MongoDB as backend data storage
Learn how to use IBM Cloud Private, Docker, and Kubernetes
Leveraging Heremap to fetch nearby landmarks

App Screenshot

Flow

Mobile App:- End user mobile app who will access the application. It leverages restful endpoints by backend microservices
Portal:- The user interface is built using Angular4. It leverages restful endpoints by backend microservices
Authentication Microservice:- This Microservice allows the user to login signup to the application
Listing Microservice:- This Microservice allows the user to list and browse the available flights
Booking Microservice:- This Microservice allows the user to checkin to a given booked flight, and book an available flight
ODM Microservice:- This Microservice helps to communicate with the ODM Service
Email Microservice:- Email Microservice communicates with RabbitMQ and Celery to send email in asynchronous ques
Map Microservice:- Map Microservice communicates with Here Map api to fetch nearby landmarks
IBM DB2:- SQL Database for authentication microservice
MongoDB:- NOSQL Database for listing microservice
MariaDB:- NOSQL Database for booking microservice
ODM:- IBM Operational Decision Manager is an advanced business rules management system that helps you capture, automate and govern frequent, repeatable business decisions and adds real-time decision making to your day-to-day operations
RabbitMQ:- RabbitMQ is a messaging broker - an intermediary for messaging. It gives your applications a common platform to send and receive messages, and your messages a safe place to live until received.
Here Map:- Here map api to fetch nearby locations

Featured technologies
Angular:- Angular is a platform that makes it easy to build applications with the web. Angular combines declarative templates, dependency injection, end to end tooling, and integrated best practices to solve development challenges
Nodejs:- An open-source JavaScript run-time environment for executing server-side JavaScript code.
Typescript:- TypeScript is an open-source programming language developed and maintained by Microsoft. It is a strict syntactical superset of JavaScript, and adds optional static typing to the language
Docker:- Docker is an open platform for developers and sysadmins to build, ship, and run distributed applications, whether on laptops, data center VMs, or the cloud.
Kubernetes:- Kubernetes is an open-source system for automating deployment, scaling, and management of containerized applications
IBM DB2:- DB2 is a database product from IBM. It is a Relational Database Management System (RDBMS)
IBM ODM:- IBM® Operational Decision Manager is a comprehensive decision automation platform that helps you capture, analyze, automate and govern rules-based business decisions
RabbitMQ:- RabbitMQ is lightweight and easy to deploy on premises and in the cloud. It supports multiple messaging protocols. RabbitMQ can be deployed in distributed and federated configurations to meet high-scale, high-availability requirements
Celery:- Celery is an asynchronous task queue/job queue based on distributed message passing. It is focused on real-time operation, but supports scheduling as well
Ionic Cross Platform Mobile App:- Ionic’s open source Framework and developer-friendly tools and services power apps for some of the world’s best-known brands - from highly successful consumer apps like Sworkit, Untappd and Dow Jones MarketWatch, to mission-critical apps supporting Nationwide, Amtrak, and NASA.
MongoDB:- MongoDB is a cross-platform document-oriented database program. It is issued under the Server Side Public License version 1, which was submitted for certification to the Open Source Initiative but later withdrawn in lieu of SSPL version 2
MariaDB:- MariaDB is a community-developed fork of the MySQL relational database management system intended to remain free under the GNU GPL. Development is led by some of the original developers of MySQL
Istio:- Istio is an open source independent service mesh that provides the fundamentals you need to successfully run a distributed microservice architecture
Weavenet:- visualising kubernetes cluster

Watch the Video

If you want a quick walkthrough of the end result, a video is available here

Deploy to IBM Cloud Private

Pre-req installation

Install Nodejs
Install Kubectl
Intall Docker
Install Ionic

Connect Docker (Private registery) with IBM Cloud Private

From your terminal type
```
$ sudo nano /etc/hosts
```
Type in your ICP ip and provide a dns name, quit and save the file
Go to Docker prefernces

pref

Navigate to Daemon tab, click on + button underneath insecure registry and add an entry “:8500”, click Apply & Restart button to restart Docker service.

dock-pi

In your terminal type
```
$ docker login <icpdns>:8500
```
Install all dependencies, create images and upload it to Private registery of IBM Cloud Private

Booking Microservice

$ cd booking-microservice
$ npm i
$ docker build -t booking-microservice  --no-cache .
$ docker tag booking-microservice  <icpdns>:8500/default/booking-microservice 
$ docker push <icpdns>:8500/default/booking-microservice

Listing Mongo Microservice

$ cd listing-mongo-microservice
$ npm i
$ docker build -t listing-mongo-microservice  --no-cache .
$ docker tag listing-mongo-microservice  <icpdns>:8500/default/listing-mongo-microservice 
$ docker push <icpdns>:8500/default/listing-mongo-microservice

Authentication Microservice

$ cd login-microservice
$ npm i
$ docker build -t login-microservice  --no-cache .
$ docker tag login-microservice  <icpdns>:8500/default/login-microservice 
$ docker push <icpdns>:8500/default/login-microservice

Email Microservice

$ cd celery
$ docker build -t celery  --no-cache .
$ docker tag celery  <icpdns>:8500/default/celery 
$ docker push <icpdns>:8500/default/celery

Odm Microservice

$ cd odm-microservice
$ npm i
$ docker build -t odm-microservice  --no-cache .
$ docker tag odm-microservice  <icpdns>:8500/default/odm-microservice 
$ docker push <icpdns>:8500/default/odm-microservice

Angular Frontend

under src/app/provider/provider.ts. Find url and change it to your icp ip
$ cd icp-frontend-new
$ npm i
$ docker build -t angular  --no-cache .
$ docker tag angular  <icpdns>:8500/default/angular 
$ docker push <icpdns>:8500/default/angular 

Ionic Frontend

under src/app/provider/provider.ts. Find url and change it to your icp ip
$ cd icp-mobile
$ npm i
$ docker build -t ionic  --no-cache .
$ docker tag ionic <icpdns>:8500/default/ionic 
$ docker push <icpdns>:8500/default/ionic 

Map Microservice

$ cd map-microservice
$ npm i
$ docker build -t map  --no-cache .
$ docker tag map  <icpdns>:8500/default/map 
$ docker push <icpdns>:8500/default/map

Find all your images in https://icpip:8443/console/manage/images

images

Connect kubesctl with IBM Cloud Private Kubernetes

Login to your icp instance by going to https://icpip:8443
Click on configure, click on copy, and paste all these commands in your terminal

Configuring Persistance storage in IBM Cloud Private for (DB2, MariaDB, MongoDB, RabbitMQ, and ODM)

icp1

Click on Platform and choose Storage, then click on Create PersistentVolume
Provide the name shared for persistance volume
Provide storage capacity for around 5GB
Access mode change to Read Write Many
Storage type to HostPath
Click on parameters tab and add the follow parameters
```
path: /anypath
```
Click on create

Create Persistant volume using the steps above for

DB2

MariaDB

MongoDB

RabbitMQ

ODM

Deploy Istio

Go to Catalog and filter istio

icp16

Choose target namespace as istio-system

icp17

Enable Grafana

Enable Prometheus

Enable Servicegraph

Enable Tracing

Enable Kiali

Click on Install
Navigate to icp-backend/configMaps-secrets-istio-calico/kiali and run
```
$ kubectl apply -f secret.yaml
```
Check if Istio isd installed properly
```
$ kubectl get pods -n istio-system
```

icp18

Deploying DB2

Go to Catalog and filter db2

icp4

Click on configure, fil up the required field and deploy
Follow this tutorial to deploy db2 in IBM Cloud Private

Make sure your Table name is "Sample"

Make sure your username and password is "admin"

Deploy as clusterip

Database creation and configuration of DB2

ssh to db2 pod
```
$ kubectl exec -it <podname> bash
```
switch the user you have created
```
$ su - <username>
```
Connect to SAMPLE db
```
$ db2 connect to SAMPLE
```

Create UserData table to store user information

User Table

db2 CREATE TABLE "SAMPLE.UserData (UserID int NOT NULL GENERATED ALWAYS AS IDENTITY (START WITH 1 INCREMENT BY 1) , LastName varchar(255) NULL , FirstName varchar(255) NULL, Location varchar(255) NULL, Email varchar(255) NULL,  Password varchar(255) NULL, Age int NULL, Tier varchar(255) NULL, PRIMARY KEY (UserID))"

Deploying MariaDB

Go to Catalog and filter mariadb
Click on configure, fil up the required field and deploy

Make sure your Table name is "Sample"

Make sure your username and password is "admin"

deploy as ClusterIP

Database creation and configuration of MariaDB

ssh to mariadb pod
```
$ kubectl exec -it <podname> bash
```
Get in to mysql cli
```
$ mysql
```
Connect to SAMPLE db
```
$ use SAMPLE
```

Create Booking Table

Booking Table

CREATE TABLE SAMPLE.Booking (BookingID  MEDIUMINT NOT NULL AUTO_INCREMENT,TS TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL , Checkin varchar(255) NOT NULL, OfferNamePricing varchar(255) NOT NULL, OfferTypePricing varchar(255) NOT NULL , CostPricing varchar(255) NOT NULL, OfferNameUpgrade varchar(255) NOT NULL, OfferTypeUpgrade varchar(255) NOT NULL , CostNameUpgrade varchar(255) NOT NULL,  UserID INT NOT NULL, FlightID varchar(255) NOT NULL , PRIMARY KEY (BookingID));

Deploying MongoDB

Go to Catalog and filter mongodb

icp15

Click on configure, fill up the required field and deploy

Make sure your username and password is "admin"

deploy as ClusterIP

Deploying RabbitMQ

Go to Catalog and filter rabbitmq
Select RabbitMQ, Click Configure, fill the form and click on deploy

use clusterip

Deploying ODM

Go to Catalog and filter odm
Select odm, Click Configure, fill the form and click on deploy

Configuring ODM and loading buisness rules

Go to http://icpip:odmport/teamserver/faces/login.jsp, and login with username:- rtsAdmin, and pass rtsAdmin
Click on Configure tab, then click on import project. Select the zip file under odm-microservice folder
Go to http://icpip:odmport/decisioncenter/t/library, and login with username:- rtsAdmin, and pass rtsAdmin
Select New Release from ICPAirlines-Rules, then select ICPAirlinesDeployment and click deploy

icp12

Configuring and deploying secrets

UID is ur database username
PASSWORD is your database password
UIDMARIADB is your mariadb username
PASSWORDMARIADB is your mariadb password
MONGOUSERNAME is your mongodb username
MONGOPASSWORD is your mongodb password
SECRET is your unique secret you give for your app for jwt authentication
EMAILUSERNAME is your gmail email username from which email would be sent
EMAILPASSWORD is your email password of your gmail email
Navigate to secrets folder in configMaps-secrets/secrets
Deploy secrets to kubernetes, navigate to folder icp-backend/configMaps-secrets-istio-calico/secrets
```
$ kubectl create -f secrets.yml
```
If you need to redeploy with certain changes
```
$ kubectl apply -f secrets.yml
```
NOTE:- all these are base64 represenation encoding.
```
$ echo -n 'admin' | base64
YWRtaW4=
```
Configuring and deploying config-maps
DATABASE:- is your database name, which should be SAMPLE
PORT:- is your exposed db2 port from port 5000, get this port by running and finding db2 service
HOSTNAME:- is your db2 service name of db2
ODM:- is your ODM api, replace dns with your service name of odm
CELERY_RESULT_BACKEND:- replace dns with ur rabbitmq service name
HOSTNAMEMARIADB:- replace with mariadb servicename
HOSTNAMEMONGODB:- replace with mongodb servicename
APPID:- your here map appid
APPCODE:- your here map appcode

Deploying microservices through helm