Archives for Cloud Computing - Page 7
Putty to log in to AWS EC2
It took me a few clicks to get putty working with an ec2 instance. This assumes you have putty and puttyGen installed locally. In putty UI - Session --> IP…
Public Private Subnets in GCP, Subnet and Instance Routing
In AWS, one could look at the routing table to determine if an Internet Gateway was an established route ( if all instances were able to route to the IgW). …
Auto Mode VPC, Custom Mode VPC and Shared VPC in GCP
Auto Mode VPC Network Use Auto mode VPCs only if you need subnets created automatically (in each region) and do not have concerns related to overlapping address spaces (for -…
How do you validate input variables in terraform?
How do you validate input variables in terraform? This is an experimental feature, which means you have to specify the following inside your (or wherever your variables are defined): terraform…
Carving out address spaces for Subnets and VPNs – AWS vs Azure
A Sample break up of addresses Traffic flows from the internet to an ALB to a Firewall (F5, Palo Alto ....) appliance. And into your application subnets (WEB subnet, APP…
What is a VPC Endpoint and where does it live?
What is a VPC endpoint and why do we need one? If you had an application hosted on an ec2 instance - and that application needed to call another service…
Network and VM isolation in GCP versus AWS
Overview Not all cloud resources require an underlying physical network. For example, an s3 bucket in AWS exists outside the VPC construct (but can be accessed by instances within a…
Sharing Resource Groups across Subscriptions
In AWS, one can share a resource ( an S3 bucket) across accounts by using simple cross account roles. In Azure, you cannot share resource groups across subscriptions. However, you…
Billing Accounts in AWS and GCP
AWS Billing Account In AWS, when you create an account, it contains a Billing Account. Sub Accounts can be added for recreating an organizational hierarchy. Each sub-account comes with it's…
Routes and Route Tables – AWS vs GCP
What is a Route? A route is an instruction for directing traffic. It is applied to an entire set of IP addresses - typically to an entire VPC or a…