DEV Community: Sahil Kaushik

Kubernets & Openshift Session by RedHat

Sahil Kaushik — Tue, 02 Mar 2021 08:54:23 +0000

Hello Everyone,

I love to share that yesterday I have attended an expert session conducted by LinuxWorld India with Red Hat Experts for Industry Use Cases of Kubernetes / Openshift.

I'm amazed to see the how Organisations can use these technologies for maximise their Outputs.

Thanks to Red Hat Experts :

Amel Mathai
Daleep Singh Bais (RHCA Level VIII, RHCI, RHCVA, CKA).
Abid Matoo.

Students of Linux World are thankful to Mr.Vimal Sir & Preeti Ma'am for organising such an event.

Summary or Points from the Session :
*Benefits and Challenges of using Kubernetes.
*Brief detail about Containers and Virtual Machines.
*Introduction to Open Shift.
*Features of Open Shift.
*Details of S2I and Service mesh.
*About PAAS(Platform as a Service).
*Introduction to Podman.
*Demo to deploy a web app by Open Shift.

Thanks,
keep learning & keep growing,
Sahil Kaushik

RedHat #vimaldaga #rightmentor #linuxworld #makingindiafutureready #righeducation #containersbylw #kubernetes #openshift #expertsession

#40daysofHybridCloud (Day-6)

Sahil Kaushik — Tue, 09 Jun 2020 20:35:55 +0000

#Day6

Last time we get into details of how Cloudfront is useful , today we will discuss more about it and few more amazing concepts.

As we all know that CloudFront is a CDNaaS for AWS which help the clients to get the data at high speed beacuse it is stored at Edge location which is near to the requested client area , the data is present in cache format therefore have less latency rate.

Cloudfront comes with it's own limitation like what if the data which is present in form of cache get updated then it have to go back and update the cache every time which is not an efficient way.

The solution to this is one method , which cleans the cache
present at the Edge Location called Invalidation.

Remember that cloudfront only store the data which is static in nature like Images , Videos and pdf but what about the data like code file etc therefore it does not support the dynamic files like LIVE Streaming which require RMTP .

Here comes the Solution to the problem called "Global Accelerator"

A service that uses a AWS Global Network to improve the availability and performance of your Application to your Local and Global users.

Global Accelerator is also used as Load Balancer when large amount of traffic comes to the site.
It continuously monitor health of our Applications endpoints and if some how one endpoints is down then it redirect the traffic to other endpoint where the App health is good.
GA also generate a common/global URL of App for all users , therefore no need to give the origin URL to clients .

AMI

Amazon Machine Images are copy of the instances which can be used further according to the requirement.

AMI types are categorized according to region, operating system, system architecture (32- or 64-bit), launch permissions and whether they are backed by Amazon EBS or backed by the instance store.

Users can select an AMI provided by AWS, the user community, or through the AWS Marketplace. Users can also create their own AMIs and share them.

They are more protected then regular instances as no user and password is required therefore can not be penetrated by Crackers.

Thanks,
Happy Learning :)

#40daysofHybridCloud (Day-5)

Sahil Kaushik — Tue, 09 Jun 2020 00:18:32 +0000

#Day5

Today I have learnt about CLOUDFRONT
I have given a brief idea about Cloudfront in my previous post.

today we will discuss little more about the same , like why it is used at the first place ?

Cloudfront is a kind of service in AWS which allow data present at certain places or location around the globe so that specific data can reach to the client without any delay or at low latency.

Cloudfront is using CDN(content delivery Network) which allow the content to be placed in all over the servers in the location where Data centers are not established , so this CDN stored the data in cache format specially for the static content .

Difference between static and dynamic content in terms of CDN

Static :- Content which are not subject to change like photos, videos etc .
Dynamic :- the data which is subject to change like code files and database structures etc.

Now Edge Location are the locations where this CDN servers are present and help the static data to be stored in form of cache and the data which is not present will be delivered to edge location from Origin(Data center).

The process of providing data from edge loc to client is called called Proxy method.

Now during this process of retriving data from CDN or Edge location there are two types of term used:-

HIT
MISS

Now this HIT is occurring when the data which is demanded by client is present on edge location then it is called as HIT or otherwise if Data is not present on Edge Loc then it is called as MISS.
After the MISS occur the request is sent to origin(S3 or EC2) by process called forwarding.

We can also make then access permissions for data stored in S3 by the Cloudfront only instead of client directly reaches to the S3 to get the data from the origin , In this way we can avoid getting unwanted request to S3 .

With the above mention operation Cloudfront give us lot more flexibility in terms of choosing between the users or clients as we can also select which region to allow to see our content or website and which to not also called Geo Restrictions.

We often knew the terms called Whitelist and Blacklist

the areas(IP's) where the access is given for the content in AWS services is termed under Whitelist.

the area or region where content is not displayed by services are called under Blacklist

Thanks,
Happy Learning :)

#40daysofHybridCloud (Day-4)

Sahil Kaushik — Sun, 07 Jun 2020 11:56:57 +0000

#Day4

Today I have learned about the json format which is used during the data retrieval while using CLI to interact with the instance and other services of AWS .

Json is one of the great method to send or receive data on web or between any programs same like YAML and XML , which works on key-value pair and it is extensively used in day to day tech.

while using AWS services through CLI , I have one software used to parse or extract json that is jq-win64.exe .

Other online tool to check whether you have a written correct syntax (Json)or not is json editor online

Lets talk more about S3 !

S3 (Simple Storage Service) is one of the storage service used in AWS which can be accessed globally (which means it is not like EC2 which is regional in nature).

but the difference between the S3 and EBS is that S3 is not same as Block storage as EBS is rather it is "Object storage as a Service"(OSTAAS) which means that OS/instance can not be installed on S3.

Reasons for not installing OS on S3 are :-
for any OS be be installed two things are required :-

storage can be partitioned (S3 can not)
storage must be formatted (S3 can not)

Never the less S3 is one of the most powerful service of AWS and also widely used.

S3 is very useful some of them mentioned below :

Most globally used storage structure of AWS.
Data is more secured on S3
Data for different services like cloudtrail and external storage can be store on S3 .
Data for Edge location is also stored on S3.

Data stored on S3 is in form of buckets.

lets discuss one more term that is Edge Location.

An edge location is the nearest point to the consumer(user) who is consuming the AWS service. In these locations, the server is not present but a small setup is there.

They are located in major cities around the world. Unlike Availability Zones which are Physical Locations where AWS servers Lies, An Edge location is basically a small setup in different locations.AWS Edge location is the place where the data is cached to reduce the latency to the end users.

That's all for today , any suggestions to make blog more intractive are most welcomed !!

happy learning :)

#40daysofHybridCloud (Day-3)

Sahil Kaushik — Sun, 07 Jun 2020 06:15:50 +0000

#Day3

Today I got know one more service used in AWS and that is #CloudTrail

Q. What is CloudTrail and why it is used ?

Cloudtrail is a service in AWS which will help us record all the events performed by user , now of-course it require memory to store data which is also provided by AWS services like EBS and S3 which we will discuss further , as per now it's a user activity monitoring service.

it is easily found in Management and governance tab of services :-

Now to use cloudtrail through CLI mode .
Like very other services in AWS , Cloudtrail also have AWS commands which can be used to interact with cloudtrail.

some of cmd are shown below :-

let me give one example of execution of such command
aws cloudtrail looklup-events

used to look activities performed by user so far in json format.

As we have discussed there are different type storages in AWS that are S3 and EBS.

S3 is service in AWS which stores data in AWS in object format and have global access same as few others in market place like Dropbox and Swift in Openstack.

Discussing more about Block storage , there are two types of Block storage :-

Ephemeral storage

Generally we install our OS on ephemeral storage which we also called as Root storage or drive , In this as soon as OS is removed data in the drive also get removed hence it is not reliable for storing important data like Web server or Databases .
Persistent storage

on the other hand this storage is permanent and also more flexible it is like external pen-drive which can store the data and do not delete it as soon as OS get terminate and can be attached or detached according to more then one OS.

Again cloudtrail data can be stored in S3 as shown we have created a bucket in S3 where this data is present :-

At last we will talk about Firewall in AWS.

Firewall is a part of AWS security group which act like a shield for accessing services and data by the outside world without permission to do so.

the property of Firewall is such that by default it does not allow anybody from getting it's services used but in order to allow certain activities like accessing website hosted on AWS or accessing data stored in S3 we can add some rules(outbound) as per our convenience .

Also get to know how to host basic web-server in AWS .

thanks for reading

Happy Learning :)

#40daysofHybridCloud (Day-2)

Sahil Kaushik — Fri, 05 Jun 2020 20:39:53 +0000

#Day2

Previously we have learned about very basics of cloud computing , now going further i would like to discuss more about this ...

On Day 2nd ,I have gone through various ways to connect or communicate with the AWS some of them are :-

GUI (AWS Management Console)
CLI (Command Line Interface)
Programming Language (SDK)

As per now we will focus on two of them that are GUI and CLI.
we also know that GUI is manual and both CLI and Programming is Automation.

lets discuss the user part here as By-default AWS have Root user which have indefinite power over all , so in order to interact with AWS on regular basis we have to create one more user which have limited access and can perform useful operation which are needed .

what is the use of another user account for AWS ?

As we all know that in today's world every thing is not done single handedly , therefore team are formed with various members , different person are performing different roles so if we share the root access with all of them then members can perform operation that can be done by Admin , in-order to avoid this situation we have user account.

In AWS we called this service as IAM (Identity Access Management)
same kind of service in Open-stack is called Keystone

While in WEB UI in order to do LOGIN we need two things that are

username
password

Same in CLI mode in order to log in we need Access key and Security key

The user which is created is having all the power accept few like:-

cannot create new user
can not see billing info

Now in order to login through CLI we need four things that are :-

AWS access key :
AWS secret Access key :
Default region name :
Default output type :

Login to the CLI mode we can perform various commands of AWS

like for creating the instance following data is required .

After you logged-in successfully the screen looks like :

using command like:- "aws ec2 help" we can find various cmd's

some of them are shown below :-

and at last the result will look like in our CLI is :-

hope you all find it usefull ...

*Happy Learning :) *

#40daysofHybridCloud (Day-1)

Sahil Kaushik — Sun, 31 May 2020 03:32:54 +0000

#Day1

Toady I have learned about basics of Cloud that is mainly cloud can be divided into two parts:-

Public cloud (AWS)
Private cloud (OpenStack)
Q .Here the question arises why cloud is used ? *

Cloud is used as we all own that every company can not own big infra of their business like thousands of Terra bytes for storage and RAM which is required as basics of any start-up company and if somehow they are able to do so also then managing it is a big problem in itself which leads to heavy investment on the resources which they not need at the first place.
so they turned to companies like AWS , Mircosoft Azure , GCS etc
service called as IaaS(Infrastructure as a Service).

Cloud store data is three format that are(STAAS):-

Object
File
Block

Focusing on Block storage as per now we have consider one example of each public(AWS) and private(OpenStack).

In AWS as storage of data in Blocks and is done by EBS(Elastic Block Storage).
Same process can be acheived in OpenStack and it is called Cinder.

Now coming to practical aspect we all know that for running any program we need a 2 things :

Hardware(Hard disk , RAM and CPU)
Operating System

Hardware infrastructure is already provided by companies like amazon (AWS) but we ourselves need to install an OS on the top of the service and resources provided by AWS.

We will take an example of AWS , In AWS we have a service which allow us to establish our OS called EC2 (Elastic Compute Cloud).

Now I will show you how to install OS in AWS :-

Create an free account on AWS (valid for 12 months)
Login with your Account.

Click on EC2 services.

Click on Instance (as OS is also known as instance in AWS).

Fill up the details and type of OS you required like Name , RAM , Storage , ENI(elastic network interface) also called network card so that you can access it later from network.
At last you will be requiring a key that is one time use and can be created in the process or separately by clicking on Key pair in Network and security tab.

Here you can see an example of OS provisioned on AWS.

that all for today !!

Happy Learning :)

#40daysofHybridCloud

Sahil Kaushik — Sun, 31 May 2020 02:25:26 +0000

Hey Everybody !! Long time no see :)

Today we will see an amazing post out there that is being the part of amazing community like dev.to and I encourage all the people out there to join such communities .

As we all know in situation like which we are facing right now that is Covid-19 , its very important for all of us to come together , help each-other out and continuously improve ourselves on day to day basis.

I want to share my experience of being a part of one more such community started by LinuxWorld Informatics Pvt Ltd and Indian Innovation & Entrepreneurship Community in the guidance or mentor-ship of Mr.Vimal Daga who is well known Technologist and World Record Holder .
I have been part of various training given by Mr. Vimal Sir like :

-1 MLOps(Machine Learning Operations)
-2 DevOps Assembly Lines

which I started during this lock-down period due to covid-19 situation .

Now being a part of one more such training :-

Hybrid Multi Cloud Training - AWS + Terraform + OpenStack + Kubernetes

which will be great learning for me .

With this I have decided to share my learning with you all which will be the part of #40daysofHybridCloud in this I will be sharing my daily practicing and learning of cloud computing from very basics to an Expert level . Keeping it short I will be very happy if you all can be part of this journey with me and this allow me add value to you all by sharing my activities .

DEV Community: Sahil Kaushik

Kubernets & Openshift Session by RedHat

RedHat #vimaldaga #rightmentor #linuxworld #makingindiafutureready #righeducation #containersbylw #kubernetes #openshift #expertsession

#40daysofHybridCloud (Day-6)

#Day6

AMI

#40daysofHybridCloud (Day-5)

#Day5

Difference between static and dynamic content in terms of CDN

#40daysofHybridCloud (Day-4)

#Day4

S3 is very useful some of them mentioned below :

#40daysofHybridCloud (Day-3)

#Day3

it is easily found in Management and governance tab of services :-

some of cmd are shown below :-

Discussing more about Block storage , there are two types of Block storage :-

Ephemeral storage

Persistent storage

At last we will talk about Firewall in AWS.

Happy Learning :)

#40daysofHybridCloud (Day-2)

#Day2

Login to the CLI mode we can perform various commands of AWS

After you logged-in successfully the screen looks like :

using command like:- "aws ec2 help" we can find various cmd's

and at last the result will look like in our CLI is :-

#40daysofHybridCloud (Day-1)

#Day1

#40daysofHybridCloud

Hybrid Multi Cloud Training - AWS + Terraform + OpenStack + Kubernetes

cloudComputing

machinelearning

devops

mlops

40daysofHybridCloud