jiva's Introduction
Terraform AWS Individual Modules ================================= ## These terraform modules provide basic infrastructure in [AWS](https://aws.amazon.com) environment. --------------------------------- ## VPC (Virtual Private Cloud) #### "VPC enables you to launch AWS resources into a virtual network" ### VPC - Creation of VPC - Enable DNS hostnames - Enable DNS support ### Subnet - Creation of public subnets - Creation of public subnet route table - Assocation of subnets to route tables ### Internet Gateway - Creation of internet gateway - Association of internet gateway with vpc --------------------------------------------------------------------- ## EKS (Elastic Kubernetes Service) #### "EKS is managed kubernetes service from the Amazon Web Services (AWS) cloud" ### EKS Cluster - Creation of EKS cluser (master node) - Creation of IAM roles as required. - Creation for security groups for cluster. ### Worker nodes for EKS - Creation of worker nodes as required by using tfvars. - Creartion of IAM roles and node policies as required. - Creation of security groups for workernodes. - Configuring outputs with config map and KUBECONFIG. ### Launch Configurations - Creation of a Launch Configuration template - Took the EKS optimized AMI ID using data module. - Specify instance type - Adding user data file to execute at initial launch of instance/server ### Autoscaling Groups - Creation of Autoscaling Group - Association of launch configuration template - Specify desired capacity of servers need to be available - Association of availability zones or association of subnets to specify availability zones - Specify maximum size of scaling capacity - Specify minimum size of scaling capacity ### RDS - Creation of DB instance with required specifications. - Added existing subnets to the DB instance. - Creation of RDS security groups along with ingress and egress rules. ### Bastion server - Creation of bastion server in same VPC. - Creation of security groups along with ingress and egress rules. **NOTE**: Using the resource `tags` functionality we can audit, track and manage resources. ##### The outputs displayed after Terraform Apply can be exported to a `.yaml` format by using command: ```bash terraform output config_map_aws_auth > config_map_aws_auth.yaml ``` ##### After connecting to the EKS cluster, apply this above config file to attach worker nodes to EKS cluster. ```bash aws eks update-kubeconfig --name nameofthecluster kubectl apply -f config_map_aws_auth.yaml ```
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