Hybrid Cloud Networking

• Consider a scenario where you have workloads on-premise and also on cloud and for the application needs there should be communication between workloads on cloud and on-premise
• Solution 1: Consider having workloads on public internet (i.e. each server will have public ip address and can be accessed over internet)
  • Solves the problem of communication
  • Cons:
    • Your servers are exposed to internet and any one from internet can access your servers.
• Solution 2: Use Virtual Private Networks (VPN) to be specific site to site VPN
  • Rather than exposing all servers to the public internet, here we would set up a vpn device on-premise and vpn device on-cloud. Both of these devices will be on public internet with strict rules of communication
  • With this your servers will not require public ip address and still communicate to the servers on the other network using private ip address
• Solution 3: Consider leased line or direct line to cloud

Compute Needs for the Enterprise on the Cloud

• To make applications run of cloud we would require vm’s with various factors.
• Size of the VMs:
  • number of vCPUS:
  • RAM size:
  • Storage Size:
• Operating System: Generally we search or create Server Operating Systems
  • Most Clouds support
    • Linux
    • Windows
    • Free BSD
• Licensing:
  • BYOL (Bring your own license)
  • Pay as you go
• Cost: Ensure you choose a Compute which saves cost.

Exercise:

• Scenario: Your organization is running application on premise on 50 Servers
  • 10 servers are running redhat linux with mysql installed on it
  • 20 servers are running application server tomcat with Ubuntu OS
  • 2 servers are running cache servers with with ubuntu os and redis cache installed
  • 3 servers are used for load balancing
  • we have 15 servers on the other site where we use it for backup and archival
• Exercise 1: Can you draw the basic diagram representing all these servers
• Exercise 2: Can you try to speak about a plan to do the same thing on cloud.