SHUBHASHRI SINHA

  CONFIGURATION OF HAPROXY  USING ANSIBLE OVER AWS Lets configure Reverse Proxy that is  Haproxy  using ansible Playbook. Check this blog to know more about Haproxy :  ANSIBLE : Configuration of Haproxy As every server has a hard coded limit . At one point in time, only limited clients can connect to the web server. If more clients try to connect, the will get some error. That's why we are using  Load Balancer.  Here we want to achieve  high availability  and  extra security  for our web server using haproxy. But the problem is that, if we need to add more servers, we can add them by adding their IP in inventory file and run the playbook. But  how Load balancer will come to know that more servers have been added???? For this we will have to manually update the configuration file of Haproxy. And manually updating is not good as we are using ansible. So the solution is, we can use  JINJA  language to write code in ...

WHAT IS KUBERNETES ? Kubernetes is a cluster management system for managing containerized applications across multiple hosts, providing mechanisms for deployment, maintenance, and scaling of applications. It groups containers that make up an application into logical units for easy management and discovery. Kubernetes builds upon years of experience at Google running production workloads at scale using a system called  Borg , combined with best-of-breed ideas and practices from the community. Google released Kubernetes in 2014, donated it as a seed technology for the founding of the  Cloud Native Computing Foundation  in 2015, and continues actively using and developing the project. Kubernetes Master The Kubernetes master is the primary control unit for the cluster. The master is responsible for managing and scheduling the workloads in addition to the networking and communications across the entire cluster. These are the components that run on the master: Etcd Storage ...

Before getting into industry, for sailing smoothly from academic to industry, it's very important have some knowledge about industry, how things works in industry, industrial use case. Just because of Mr. Vimal Daga sir and Mrs. Preeti Daga ma'am, I got this opportunity. On 28 Dec 2020  , they  arranged Industry Expert Practical Demo Session on Ansible. Two of the best expert Redhatters of the industry Sreejith Anujan  and Arun  Eapen CISSP, RHCA, RHCSS, RHCDS, RHCVA  they taught and showed use cases and industrial need. Lets know two of the best experts of the industry -> Mr. Sreejith Anujan & Mr. Arun Eapen .👨‍💻 ➡️ "Sreejith Anujan" ,  The Principal Instructor at Red Hat  ▪️ Primarily responsible for empowering Red Hat customers with tailor-made enablement services.  ▪️Also heading the designing and delivering high-quality content on integrated solutions and trusted partners across APAC, ANZ, and APJ. ▪️Connected with RedHat for aroun...

 PROBLEM :   We all know that ansible is famous for it's  idempotency .  But if we configure some service and if we change anything in it's configuration file, then we need to restart that service.  The problem is : if configuration file is unchanged, then? Then also our ansible task will run and restart service unnecessarily. In this case, ansible is not working as idempotent. Our service will restart every time we run the playbook, even if configuration file is not updated. SOLUTION : HANDLERS We can use Handlers in Ansible to tackle this problem.  Handlers are just like a normal task. Handlers will perform an action when listens for a notify event. If nothing notifies a handler, it will not run. Regardless of how many tasks notify a handler, it will run only once, after all of the tasks completed in a particular play. To know more about ansible and it's playbook, check my this blog :  ANSIBLE : How Industries are solving Challenges using Ans...

  ANSIBLE Ansible  automates and simplifies repetitive, complex, and tedious operations . Everybody likes it because it brings  huge time savings  when we install packages or configure large numbers of servers. Its architecture is simple and effective. It works by connecting to your nodes and pushing small programs to them. These programs make the system comply with a desired state, and, when they have finished their tasks, they are deleted. To know more about ansible, check my this blog :    ANSIBLE : How Industries are solving Challenges using Ansible HAPROXY HAProxy is an open source, free, very fast and reliable solution offering high availability, load balancing and proxying for TCP and HTTP-based applications.  It is particularly suited for web sites crawling under very high loads while needing persistence or Layer7 processing. It distributes a workload across a set of servers to maximize performance and optimize resource usage. HAProxy can be us...

ANSIBLE Ansible  automates and simplifies repetitive, complex, and tedious operations . Everybody likes it because it brings  huge time savings  when we install packages or configure large numbers of servers. Its architecture is simple and effective. It works by connecting to your nodes and pushing small programs to them. These programs make the system comply with a desired state, and, when they have finished their tasks, they are deleted. Ansible  works over SSH  and doesn't require any daemons, special servers, or libraries to work. A text editor and a command line tool are usually enough to get your work done. You simply describe your infrastructure in a text file (INI) and then all the information about the desired state of these machines are organized in playbooks . It is able to gather node information (such as IP addresses or Operating System details) into so-called " facts ", which help with the selective and automated provisioning of different configura...