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A hands on repo with multiple demonstrations on AWS 🎓
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# AWS 2 Tier Architecture setup with AWS CLI - Wordpress application on AWS RDS running MySQL
There are two parts to the setup,
- **Part 1** - Setting up the network infrastructure (VPC, Subnets, Security Groups)
- **Part 2** - Create & Configure the Database, Web & Load Balancer Instances
Assuming you have already setup your AWS CLI for Region `US East (N. Virginia)`. Lets move forward;
# Part 1 - Create VPC, Subnet, Security Group
### Setting the AWS Region
```sh
export AWS_DEFAULT_REGION=us-east-1
```
### Creating a VPC
Lets create a `Virtual Private Cloud - VPC` for our setup with /20 range and get our VPC ID using the `query` parameter and set the output format to `text`. Its is a good practice to give meaningful name to the AWS resources, Lets call our VPC `tmpVPC`
```sh
vpcID=$(aws ec2 create-vpc \
--cidr-block 10.0.0.0/20 \
--query 'Vpc.VpcId' \
--output text)
```
##### Tag the VPC
```sh
aws ec2 create-tags --resources "$vpcID" --tags 'Key=Name,Value=tmpVPC'
```
Instances launched inside a VPC are invisible to the rest of the internet by default. AWS therefore does not bother assigning them a public DNS name. This can be changed easily by enabling the `DNS` support as shown below,
```sh
aws ec2 modify-vpc-attribute --vpc-id "$vpcID" --enable-dns-support "{\"Value\":true}"
aws ec2 modify-vpc-attribute --vpc-id "$vpcID" --enable-dns-hostnames "{\"Value\":true}"
```
_Check if internet gateway is set. If it wasn't there then do these,_
```sh
internetGatewayId=$(aws ec2 create-internet-gateway \
--query 'InternetGateway.InternetGatewayId' \
--output text) && echo "$internetGatewayId"
aws ec2 attach-internet-gateway --internet-gateway-id "$internetGatewayId" --vpc-id "$vpcID"
```
##### Tag the Internet Gateway
```sh
aws ec2 create-tags --resources $internetGatewayId --tags 'Key=Name,Value=tmpVPC-Internet-Gateway'
```
<sup>I have chosen /20 CIDR deliberately to allow us to create different subnets for our db, web instances and reserve some for the future. You might want to choose something else that works better for you. **Important:** _AWS reserves both the first four and the last IP address in each subnet's CIDR block. They're not available for use. The smallest subnet (and VPC) you can create uses a /28 netmask (16 IP addresses), and the largest uses a /16 netmask (65,536 IP addresses). Excellent resources to understand CIDR blocks [here](http://bradthemad.org/tech/notes/cidr_subnets.php) & [here](https://coderwall.com/p/ndm54w/creating-an-ec2-instance-in-a-vpc-with-the-aws-command-line-interface) & my quick help [gist](https://gist.github.com/miztiik/baecbaa67b1f10e38186d70e51c13a6c#file-cidr-ip-range)_<sup>
## Subnet Reservation for the Database, Web Servers & future
Lets [reserve the IP Range](https://medium.com/aws-activate-startup-blog/practical-vpc-design-8412e1a18dcc#.dqxj9dlh2) to spread across multiple availability zones.
| VPC Range | Availability Zone | Reservation Purpose | IP Ranges | IP Ranges | IP Ranges |
|-------------|-------------------|---------------------|-------------|--------------|--------------|
| 10.0.0.0/20 | | | | | |
| | AZ1 | US-East-1b | 10.0.0.0/21 | | |
| | AZ1 | Private - DB Subnet | | 10.0.0.0/22 | |
| | AZ1 | | | 10.0.4.0/22 | |
| | AZ1 | Web Subnet | | | 10.0.4.0/23 |
| | AZ1 | Spare Subnet | | | 10.0.6.0/23 |
| | | | | Excerpt of 15,548 characters
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Would you bet a product on this? Bounded 0–100 and slow moving.
matched fp:ac32d636e88e0b2e, topic:serverless
matched fp:ac32d636e88e0b2e, topic:automation