added install&usage

Author: defo89

README.md

@@ -5,4 +5,46 @@ Python scripts for AWS using boto3 SDK
 | ---------------------------| ----------------------------------------------------|
 | [ec2_start.py](scripts/ec2_start.py)	             | Start all instances with a specific tag             |
 | [ec2_stop.py](scripts/ec2_stop.py)	             | Stop all instances with a specific tag              |
-| [ec2_ip_route53.py](scripts/ec2_ip_route53.py)     | Find EC2 public IP and change Route53 'A' record    |
+| [ec2_ip_route53.py](scripts/ec2_ip_route53.py)     | Find EC2 public IP and change Route53 'A' record    |
+
+## Installation
+
+Requires Python and [boto3](https://github.com/boto/boto3).
+
+```
+git clone https://github.com/dmitrijsf/aws-boto3-scripts
+cd aws-boto3-scripts
+pip install -r requirements.txt
+```
+## Usage
+
+**Set desired AWS credentials**
+
+In this example I am using [**aws-vault**](https://github.com/99designs/aws-vault) to work with desired profile.
+
+```
+❯ aws-vault add home
+Enter Access Key ID: your-aws-access-key-id
+Enter Secret Access Key: your-aws-access-key
+Added credentials to profile "home" in vault
+
+# launches subshell with desired AWS environment variables
+❯ aws-vault exec -- home
+```
+**Launching Scripts**
+
+```
+❯ cd scripts
+# modify the script according to your needs
+# ec2_ip_route53.py
+
+# set instance ID
+instance_id = 'i-0111112233' # Instance ID, e.g. 'i-0111112233'
+# set Hosted Zone ID
+zone_id = 'ZBDAAABBBCCC' # Hosted Zone ID, e.g. 'ZBDAAABBBCCC'
+# domain
+domain = 'technoff.eu' # Domain, e.g. technoff.eu
+
+❯ python ec2_ip_route53.py
+technoff.eu record was changed to: 52.51.120.202
+```