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Part 2: Building a short end-to-end environment in OCI

In Part 1 - https://www.letsdosometech.com/post/part-1-building-a-short-end-to-end-environment-in-oci we have covered the introduction, architecture, areas to cover and how to build compartments.



Areas covered so far :


- Building Compartments. ( Completed in Part 1)

- Building VCN’s

- Building Compute instances.

- Building Load Balancer.

- Building DB Systems.

- Create domain zones.

- Create WAF.

- Create VCN Flow logs.

- Create Load balancer Logging.

- Create object storage & replication policies.

- Create resources in secondary region.

- Create DRG’s in both regions.

- Remote peering connections.

- Validate connectivity between both regions.


Let's continue with creating VCN's in this article.


Building a VCN (Hyderabad Region):


Create a VCN by name WebVCN with the CIDR block – 10.0.0.0/16 in Hyderabad region.

Under VCN - Click on create VCN and proceed with filling the details as below and click on create VCN.



It looks as below post creation -



Creating the following subnets -

public subnet - mgmtsubnet with CIDR - 10.0.4.0/24

public subnet - lbsubnet with CIDR - 10.0.3.0/24

private subnet - appsubnet with CIDR - 10.0.2.0/24

private subnet - dbsubnet with CIDR - 10.0.5.0/24


Steps for creating a subnet - (Appsubnet)



Similarly rest of the subnets should be created and it would be looked as below -



Create a private security list for the App subnet for allowing connections to & fro from the CIRD range 10.0.0.0/16 for ports 80,8080 & 22.





Tag the PrivateSL to the Appsubnet and delete the existing tagged default Security list.




Creation of Internet Gateway:



Adding a route in the VCN's default route table to the internet using the Internet Gateway just created -



Creation of Service gateway for access to Oracle services from the private subnet -



Create a NAT Gateway:



Update the route rules for the AppSubnet to add the NAT gateway & Service gateway.



Let's continue with creating of Compute instances, DB Systems and Load balancer in the next part.


Rest of the parts can be accessed through -


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