AWS
Quick guide on aws for beginners Understanding network concepts in aws How to achieve CI/CD in aws CI/CD in aws managed resources with Jenkins Push Image to aws ECR Using GitHub Actions Setup an EventBridge Rule in aws How ECS & ECR works in aws EKS with Fargate Profile Launch EKS using eksctl in aws Container insight for EKS-Fargate in cloudwatch Deploy aws resources with CloudFormation AWS secrets scanning by GitHub Setup Site to Site VPN Connection in AWS
AZURE
Gateways in Azure Understanding network concepts in Azure Ingress in Azure Kubernetes Service
GCP
Architecting hybrid infrastructure with Anthos

ANSIBLE
Ansible a configuration management tool Runbook Automation tool for playbooks
DOCKER
Docker a containerization Tool Networking in Docker Multi-stage build in Docker what is docker-compose All about Docker swarm
GITHUB
CLI instruction to work with GitHub Integrating Jenkins with GitHub Push Image to ECR Using GitHub Actions
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Jenkins a continuous integration tool Acheive CI/CD using Jenkins in AWS Configuring weblogic deployer plugin in Jenkins
KUBERNETES
Kubernetes an orchestration framework Launch kubernetes cluster in Different ways Debugging your kubernetes cluster Certificates renewal of kubernetes cluster Deploying application on Kubernetes cluster api versions to use in manifest file RBACs in Kubernetes Health check of containers in Kubernetes Rancher a cluster management platform Understanding ISTIO as a service mesh
TERRAFORM
Deploying IaC using Terraform Terraform module EKS cluster using Terraform

APACHE
Things to know in Apache How to Configure Apache-httpd Server Setup httpd as os-service on OL8 SiteMinder and its Integration with WebServer Apache SSL Installation Instructions NO_RESOURCES Errors in APACHE with WLS
WEBLOGIC
Installing WebLogic 12.1.3 without GUI WebLogic Server as a managed Azure service WLS domain extension to include JRF template All about OPatch in WLS How to define WorkManager in Weblogic Some known Weblogic exceptions Different OutOfMemory issues Some known Weblogic exceptions Play with WLST Persistent store in WLS Configuration of NodeManager

JAVA
JAVA_OPTIONS Study on JAVA_HEAP Native OOM in Java Heap Types of Threads Various Java-options to use in Java apps How to run Java Flight Recorder dbping a java-weblogic utility
SSL
When & why to use SSL certificates SSLv3 to TLS1.* SHA2 on Oracle https Server Weblogic SSL Renewal Steps
CHEATSHEETs
Linux Cheatsheet Linux Log parsing cheetsheet SSL Cheatsheet MySQL Cheatsheet PostgreSQL Cheatsheet WebLogic Cheatsheet Python Cheatsheet Kubernetes Cheatsheet Terraform Cheatsheet Hashicorp-vault Cheatsheet GCP Cheatsheet
OTHER
All about Messaging Queue small guide on Python WLSDM monitoring agent in WLS Register driver for MSSqlServer Understanding YAML

24 February 2017

DevOps

Set of practices that emphasize the collaboration and communication of both software DEVelopers and IT OPerationS professionals while automating the process of software delivery and infrastructure changes, which aims at establishing a culture and environment where building, testing, and releasing software can happen rapidly, frequently, and more reliably.

"which ultimately means building digital pipelines that take code from a developer’s laptop all the way to revenue-generating prod awesomeness"

some myths that should be addressed before deep dive into DevOps

Myth - DevOps replace Agile
DevOps is the next step of agile
DevOps principles and practices are compatible with agile
agile is an enabler of DevOps
not a replacement, but is a logical continuation
a 'deployable piece' of code rather than a 'potentially ship-able piece' of code after each sprint

Myth - it "All Dev & No Ops"
the nature of IT Ops work may change.
ops collaborate far earlier in the software life cycle with Devs.
Devs continue to work with Ops long after the code is in prod.

Myth - DevOps is just automation
it requires automation for sure.. But that's not all.. it's much beyond that.

Myth - DevOps is a Tool/Product
it's rather a combination of tools
we don't buy DevOps.. instead, we do DevOps

In an organisation where everything gets automated for seamless delivery the generic logical flow will be:
  1. Developers develop the code and the source code is managed by a Version Control System tool like Git, then developers send this code to the git repository and any changes made in the code is committed to this repository.
  2. Then Jenkins pull this code from the repository using the git plugin and build it using tools like Ant or Maven.
  3. Configuration management tool like Ansible/Puppet deploys this code & provision testing env. and then Jenkins releases this code on the test environment on which testing is done using tools like selenium. 
  4. Once the code is tested, pipelines configured using Jenkins send it for deployment on the production server (even production server is provisioned & maintained by tools like Ansible/Puppet)
  5. After deployment, it is continuously monitored by tools like Nagios.
  6. Docker containers provide a quick environment to test the build features. 


here are some useful articles with respect to DevOps





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