Month: January 2023

CIDR Expansions Expand the following CIDR 192.168.224.0/19 fixed = 19 variable = 13 192.168.111xxxxx.xxxxxxxx SM: 11111111.11111111.11100000.00000000 start: 192.168.224.0 end: 192.168.255.255 10.128.0.0/10 10.128.0.0/10 fixed = 10 variable= 22 10.10xxxxxx.xxxxxxxx.xxxxxxxx SM: 11111111.11000000.00000000.00000000 start: 10xxxxxx => 10000000 10.128.0.0 end: 10xxxxxx=> 10111111 10.191.255.255 172.16.240.0/22 fixed = 22 variable = 10 172.16.111100xx.xxxxxxxx SM: 11111111.11111111.11111100.00000000 start = 172.16.11110000.0 => 172.16.240.0 end… Continue reading AWS Classroomnotes 31/Jan/2023

Version Control Systems – Git an Introduction Version control system is a software system that allows developers to store the code in common location retains history of every change allows to work for multiple versios/releases/customers Generally Version Control System will have two software components Client Software (Used by Developers of code) Server Software (Used to… Continue reading DevOps Classroomnotes 31/Jan/2023

CIDR Expand the CIDR Range 10.224.0.0/11 fixed = 11 variable = 32-11 = 21 IP: 10.111xxxxx.xxxxxxxx.xxxxxxxx SM: 11111111.11100000.00000000.00000000 Range: 10.224.0.0 to 10.255.255.255 Subnet Subnet is part of network As a cloud engineer we are expected to create networks and multiple subnets Problem-1: We need to design network with two subnets of size approximately 200 devices… Continue reading Azure Classroomnotes 31/Jan/2023

Network Basics Lets create a network to connect 100 devices Solution Subnet mask 255.255.255.0 => 1 octet => 8 =>2^8 =256 255.255.0.0 => 2 octets => 16 => 2^16 = 65536 255.0.0.0 => 3 => 24 => 16777216 private 192.168.0.0 to 192.168.255.255 172.16.0.0 to 172.31.255.255 10.0.0.0 to 10.255.255.255 Size = 100 SM: 255.255.255.0 ip: 192.168.0.x… Continue reading AWS Classroomnotes 30/Jan/2023

Azure DevOps Services GitHub account: Create a Github account (https://github.com) Azure DevOps: Refer Here and click on start with Github Creating Azure DevOps Organization/Project Azure DevOps Service – Boards This is used Plan, Manage and track projects Azure Repos This is where developers commit/coloborate code Azure Repos support Git Team Foundation Version Control Azure Pipelines… Continue reading DevOps Classroomnotes 30/Jan/2023

CIDR Notation CIDR (Classless interdomain Routing) The ip addressing is mentioned as x.x.x.x/n x.x.x.x => ip n = fixed bits Examples 10.10.10.0/24 ip: 10.10.10.x SM: 11111111.11111111.11111111.00000000 255.255.255.0 2^n – 2 Size: 2^(32-24) – 2 => 254 10.10.10.0/23 ip: 10.10.0000101x.xxxxxxxx => 10.10.10.x 10.10.11.x SM: 11111111.11111111.11111110.00000000 Size: 2^(32-23) – 2 => 510 192.168.0.0/20 IP: 192. 168. 0000xxxx.xxxxxxxx… Continue reading Azure Classroomnotes 30/Jan/2023

Ansible Vault Refer Here for official docs on ansible vault Refer Here for the changeset the commands used were ansible-vault encrypt ansible-vault decrypt ansible-vault create ansible-vault view ansible-playbook –ask-vault-password … Ansible in CI/CD Pipelines Ansible Control Node as CI/CD Engines NOde. Sample Script with Declarative Pipeline to depoy pipeline { agent { label ‘build’ }… Continue reading DevOps Classroomnotes 29/Jan/2023

Networking Basics There are two types of networks Public Network: This network is accessible over internet Private Network This the network for intranet (internal) usage Private networks have ip address ranges 10.0.0.0 to 10.255.255.255 172.16.0.0 to 172.31.255.255 192.168.0.0 to 192.168.255.255 Through out this course we will be dealing with private networks As per what we… Continue reading AWS Classroomnotes 29/Jan/2023

Agile and DevOps Architecture of the Application Agile way of working For a new project In Agile, we list out all the things needed to be done as Product Backlog. Refer Here for sample product backlog items We enter product backlog items and each item gets a unique number Sprints are decided (number of sprints… Continue reading DevOps Classroomnotes 29/Jan/2023

Networking Basics Problem Statement – Network Design Problem 1 we need a network to connect 200 devices We need to figure out the network id and host id ranges Generally we have two kinds of networks public network: These ip addresses are accessible over internet We have very limited public ip’s available in IPv4 private… Continue reading Azure Classroomnotes 29/Jan/2023