Feroz DBA'S Blog

What is a Docker? It's a container management platform to develop, deploy and run your applications as a container.  It enables you to separate your application from infrastructure. It runs directly on the host machine's kernel. It is quick to deploy and easy to use in the real world. It's cross-platform software.  Two types of Versions: Community Edition (CE) - Open Source Enterprise Edition (EE) - Commercial What is a container? It's a runtime process of an image where our application process will be running.  Container contains all application code and required dependencies (like Software, Environment variables) to run the applications.  With the help of containers, we can carry the application from one machine to another without an additional configuration to create/deploy the application. Each and every container has it's own file system. What is required to host your applications? We need Infrastructures like  Physical Servers OR Virtual Machines --- Hardw...

AWS Services: EC2 - Elastic Compute Cloud EBS - Elastic Block Store EFS - Elastic File Store S3 - Simple Storage Service ELB AutoScaling VPC IAM EKS ECR AWS CLI Cloud Service Models: IaaS - Infrastructure as Service (Admins) Managed by Users: Applications Data Runtime Middleware O/S Managed by the Vendor/Service Provider: Virtualization Servers Storage Networking Example: EC2 PaaS -  Platform as a Service (Developers)  Managed by Users: Applications Data Managed by the Vendor/Service Provider: Runtime Middleware O/S Virtualization Servers Storage Networking Example: EKS (Elastic Kubernetes Service) SaaS- Software as a Service  Everything is managed by the Vendor, we just use the Softwares and pay based on the service. Managed by the Vendor/Service Provider: Applications Data Runtime Middleware O/S Virtualization Servers Storage Networking Example: Cloud Watch  AWS Global Infrastructure: i) Availability zones (Data Centers - Physical) ii) Geographical regions (It's...

Application Servers i) JBoss or Wildfly  From 1.x to 7.x called JBoss and from 8.x called Wildfly ii) Tomcat iii) WAS (WebSphere Application Server) iv) Weblogic Tomcat Directory Structure  i) bin startup.sh startup.bat shutdown.sh shutdown.bat catalina.sh start/stop catalina.bat  version.sh version.bat ii) conf tomcat-users.xml server.xml iii)lib jar files iv)logs catalina.out v)webapps It stores 5 default applications. However, you can deploy any number of applications. vi)work After deploying the applications, it will store some application-related files which will use. vii)temp Temporary directory Tomcat Server installation  The pre-requisite is java to be installed download link for tomcat zip file https://mirrors.estointernet.in/apache/tomcat/tomcat-9/v9.0.41/bin/apache-tomcat-9.0.41.zip Step-1: Download and install java Step-2: Download and install tomcat  # wget https://mirrors.estointernet.in/apache/tomcat/tomcat-9/v9.0.41/bin/apache-tomcat-9.0.41....