Raja Ganesan zeagord

Go to start.spring.io
Add service discovery, eureka or similar
Eureka client in .Net - https://steeltoe.io/docs/steeltoe-discovery/
1. EnableDiscoverClient
Change the port
Give the application a name - because service discovery happens by name
Circuit Breaker - Hystrix, Resilience4J, https://steeltoe.io/docs/steeltoe-circuitbreaker
Chaos Engineering
Log Analysis - ELK
Metrics - Prometheus, InfluxDB (Time series database)

PROBLEM

We ran in to a lot of space issues with storing docker images in Azure cloud VMs. Because by default docker images, layers and containers are stored in the

/var/lib/docker

It is the same with the Amazon AWS as well.

The problem with this is most of the virtual machines have a very limited space in the OS Disk and the space can run out very soon. It is wise to save the docker images and attach your data containers to point a mount volume.

When we were trying to create a docker image for our Node JS based application, we chose to use the official Node docker image (~700MB). On top of that we need to add the node modules, business logic, etc and so on. The final image size was staggering (~1.2GB). It was not what we wanted. Secondly, the average build time to do NPM install and run a grunt task totally took 15 minutes for every build. I am not even talking about the pain of configuring this for different CI/CD pipelines and environments.

The initial docker file was looking something like this:

Initial Docker File

FROM node:6.10.1-alpine

	docker build -t order-service:latest .

	docker run -p 9910:8080 order-service:latest

	docker images

	docker ps # This will give the container id

	docker exec -it <container id> /bin/sh

	@Bean
	public ClientHttpRequestFactory createRequestFactory(@Value("${connection.timeout}") String maxConn) {
	PoolingHttpClientConnectionManager connectionManager = new PoolingHttpClientConnectionManager();
	connectionManager.setMaxTotal(maxTotalConn);
	connectionManager.setDefaultMaxPerRoute(maxPerChannel);

	RequestConfig config = RequestConfig.custom().setConnectTimeout(100000).build();
	CloseableHttpClient httpClient = HttpClientBuilder.create().setConnectionManager(connectionManager)
	.setDefaultRequestConfig(config).build();
	return new HttpComponentsClientHttpRequestFactory(httpClient);

	/**
	* Created by rg3 on 10/17/17.
	*/

	import java.util.ArrayList;

	public class NoOfStories {
	static int small=1;
	static int large=2;

	import java.util.*;

	/**
	* Created by rg3 on 10/17/17.
	*/

	public class UniqueStringTask {

	private static String findFirstUnique(String ...names){
	if (names.length ==0) { // Check for empty array