![]() A custom AMI enables greater control from a release management standpoint because our team controls the composition of the AMI image. A custom-built AMI works well because it allows us to customize an EC2 instance with our own application and configuration and save it as a dedicated AMI image in our AWS account. In the previous exercise, we used a custom AMI saved into our EC2 AMI library. We would only notice a difference in much larger deployments. Although, I might add that I’ve not seen a difference with the small loads in these exercises. Considering we are simply running test environments, a NAT instance that performs a bit slower is fine with me. However, a NAT appliance running as a free tier eligible EC2 instance does not compare to the performance of AWS NAT Gateways. ![]() So just for grins, I’ve created a VPC that uses AWS NAT instances to save a couple of dollars. It might only be a dollar or two per day. A NAT gateway incurs costs even using AWS under a free tier plan. One of the differences between this code and the code sample in the previous exercise is that we’ll use NAT instances instead of a NAT gateway. Can add/remove bastion host (jump server) at any time without impact to other resources (Bastion Hosts – Provides administrators SSH access to servers located in a private network)ĭifference – NAT Instance instead of NAT gateway.Ability to launch or destroy bastion host (jump server) only when required.Four Web Servers behind a Classic load balancer.The ability to provision resources into AWS using “ modular code.”.Using Terraform to create the deployment Infrastructure as Code.This exercise creates a load-balanced website (similar to the previous exercise) but with essential differences (NAT Instances instead of NAT gateway and using Docker container instead of a custom AMI as a web server). Docker Containers running on EC2 instances. ![]() VPC using NAT instances instead of NAT gateways. ![]() A NAT Instance is great to save a couple of dollars when using an AWS Free Tier planĪll of the Terraform code for this exercise is in Github repository Features ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |