JDK Installation

https://adoptopenjdk.net/installation.html

AWS : EC2 Instances Pricing

https://aws.amazon.com/ec2/pricing/on-demand/

AWS : IGW vs NATGW

https://medium.com/awesome-cloud/aws-vpc-difference-between-internet-gateway-and-nat-gateway-c9177e710af6

Internet Gateway (IGW) allows instances with public IPs to access the internet.
NAT Gateway (NGW) allows instances with no public IPs to access the internet.

IGW allows Outside traffic to go in

NAT-GW does not allow Outside traffic to come in, It only allows from inside to Outside

Ansible : Ansible Playbook: Ansible Tower

https://www.youtube.com/watch?v=EcnqJbxBcM0

https://docs.ansible.com/ansible/latest/user_guide/intro_inventory.html

Ansible :

• Configuration Management 
• YAML Based
• Push Based Approach
• Agentless Architecture - No agent on Target VMS - Simple SSH to Target VM

2 Parts on Local Machine/Server

1) Ansible Inventory : Client Manifest - Details of Group/Target Client VMs

2) Ansible Playbook : YAML - Job - Sections in Ansible - Yaml Configurations

The default location for inventory is a file called /etc/ansible/hosts. 

You can specify a different inventory file at the command line using the -i <path> option.

Michael DeHaan - Author of Ansible

Ansible was acquired by Redhat

Redhat was acquired by IBM

Ansible has a UI Centric version as well - Ansible Tower

Ansible Tower - Restful UI Web based 

Microservices: Spring Boot: Netflix : Components

https://www.optisolbusiness.com/insight/micro-services-architecture-spring-boot-and-netflix-infrastructure

Convert Certificates into formats

https://knowledge.digicert.com/solution/SO26449.html

Best Certificate Viewer Tool : SSL Viewer : Keystore Explorer : keystore-explorer.org

 

https://keystore-explorer.org