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istio-service-mesh

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Spring boot example in Kubernetes and the service mesh with Istio

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# Service mesh with Istio

## How to create AWS Instance and configure master and slave nodes ##

[Click here to download PPT](https://drive.google.com/open?id=1EwdjRzMtFKiV2JILaI6IChXGuO9eWJWy)

In this example we will learn how to configure AWS Instance, i already have created an AWS image where kubernetes is also installed.
In this we will see how configure master nodes and how slave nodes joins cluster

## Istio Installation Version 1.5 ##

[Click here to download PPT](https://drive.google.com/open?id=15T_EraatqS7ARW9fsB4rQHo-Kqf-sLM6)

In this we will learn how to install istio

## Micro service deployment ##

[Click here to download PPT](https://drive.google.com/open?id=1i2KQ4A0OT00gLaLD4G3Z1WpJxVFE98kt)

We have two microserice **Customer** and **practice**. Customer microservice calls the practice microservice.

[Customer](https://hub.docker.com/repository/docker/kuldeep99/customer) and [practice](https://hub.docker.com/repository/docker/kuldeep99/practice) images are pulled from docker hub.

One version of customer (V1) and four version of practice (V1,V2,V3 ad V4) microservice are deployed to cluster.

In this example we will see how to configure [customer](https://github.com/kuldeepsingh99/servicemesh/blob/master/istio/customer-service.yaml) and [practice](https://github.com/kuldeepsingh99/servicemesh/blob/master/istio/prac-service.yaml) yaml files. Setting up classic load balancer and access microservice in browser.

We also need to apply to apply [Destination rules](https://github.com/kuldeepsingh99/servicemesh/blob/master/istio/default-destination-rule_v1_v2_v3.yaml) and [Customer Gateway & Virtual Service](https://github.com/kuldeepsingh99/servicemesh/blob/master/istio/customer-gatway.yaml) so that its accessible outside cluster

## Domain setting ##

[Click here to download PPT](https://drive.google.com/open?id=1EXpRpp-AtyJR_Njm2-KiPXLNqUimlM4c)

In this we will see how to set public domain in Route53 and map it with Load balancer and finally accessing the microservice with public domain.

## Monitirong with prometheus & graphana ##

[Click here to download PPT](https://drive.google.com/open?id=1NtMpqe_9JGgCToUyAH4irad03Kx4PTOV)

How to set the [Gateway and Virtual service rules](https://github.com/kuldeepsingh99/servicemesh/blob/master/istio/graphana-gatway.yaml) to access Graphana in browser

## Visualization with kiali ##

[Click here to download PPT](https://drive.google.com/open?id=1-eltKYF1fYcPQ8aZIqS6TmWcaBGklpDK)

How to set the [Gateway and Virtual service](https://github.com/kuldeepsingh99/servicemesh/blob/master/istio/kiali-gatway.yaml) rules to access Kiali in browser

## Distributed tracing with Jaeger ##

[Click here to download PPT](https://drive.google.com/open?id=13zItIyzlOsdXJmQg8sJc_MfkRBniwf1u)

How to set the [Gateway and Virtual service](https://github.com/kuldeepsingh99/servicemesh/blob/master/istio/jaeger-gatway.yaml) rules to access jaeger in browser

## Traffic Routing ##

[Click here to download PPT](https://drive.google.com/open?id=1j34yEsDLdiLPBnuSsPSbcXXJanywxCXz)

How to route 100% traffic to [Practice Version V1](https://github.com/kuldeepsingh99/servicemesh/blob/master/istio/practice_routing_v1.yaml) and how to route Percentage wise traffic to version from [command](https://github.com/kuldeepsingh99/servicemesh/blob/master/istio/request_routing_v1_v2_canary.yaml) and kiali

## Handling Retry ##

[Click here to download PPT](https://drive.google.com/open?id=1gE34q7_wN91kA3T1PwzN3dGtnSpDrCc0)

Here we have deployed [V4 of Practice Service](https://github.com/kuldeepsingh99/servicemesh/blob/master/istio/practice_buggy_deploy.yaml) which has some Issue and it will randomly throw exception

Here is the Code
```
Random random = new Random(); 
int randomNumber = random.nextInt(10);
		
if(randomNumber < 5) {
  throw new Exception("not able to process");
} else {
  return "practice service V4";
}
```
Here we will see how [istio retry](https://istio.io/docs/concepts/traffic-management/#retries) mechanism will help.

In this example we will redirect all traffic to [Practice(V4) version](https://github.com/kuldeepsingh99/servicemesh/blob/master/istio/request_routing_v4.yaml) and check the sucess rate in graphana, then we will apply [Practice Service Retry rules yaml](https://github.com/kuldeepsingh99/servicemesh/blob/master/istio/practice_retry.yaml) and check the success rate

## Outlier Detection & Circuit Breaker ##

[Click here to download PPT](https://drive.google.com/open?id=1MiIiLVTuq5iapg0KmCPl_rvaI5YNNwez)

[Circuit Breaking & Outlier detection](https://istio.io/docs/tasks/traffic-management/circuit-breaking/) important pattern for creating resilient microservice applications. If any failure occurs then istio will autimatically open's the circuit for sometime as per the configuration and all the request are router to healthy instances.

Here we will see this example traffic is being router to [Practice V1 and V4](https://github.com/kuldeepsingh99/servicemesh/blob/master/istio/request_routing_v1_v4.yaml) and we will analyze the failure rate for V4, then we wil apply [Outlier detection rules](https://github.com/kuldeepsingh99/servicemesh/blob/master/istio/practice-destination_oulier_v4.yaml) will be disconnect the V4 version and 100% traffc is being routed to V1.

## Mirroring ##

[Click here to download PPT](https://drive.google.com/open?id=1JhMf9LjQkVnTHOAke-__2QI_NAwYqBN_)

[Mirroring](https://istio.io/docs/tasks/traffic-management/mirroring/) is a concept that allows feature teams to deploy changes to production with as little risk as possible. Mirroring sends a copy of live traffic to a mirrored service.

In this task 100% traffic is routed to [Practice V1](https://github.com/kuldeepsingh99/servicemesh/blob/master/istio/practice_mirror_test.yaml) and copy of that is sent to version V4. So now can check the V4 Logs for any error. In this way we would be able to test the new version in production.

## HTTPS Configuration in NLB ##
[Click here to download PPT](https://drive.google.com/open?id=1QtovvTCtXYm2EEDtYWTM-946fa-BJ0Om)

In this task we will see how to configure Network load balancer, configure https etc.

## Security ##

[Click here to download PPT](https://drive.google.com/open?id=1Qld4IE9IMyHGXE0Qcp5Qb_2CgYEh6a1t)

In this task we will see after applying mTLS Setting how pods without sidecar won't be able to access pods with sidecar

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