CLI contd..

CLI to create, stop and resize, terminate ec2 instances

• Creating ec2 instance
• output: ec2 instance with a public ip
• inputs:
  • tags: Name: from-cli
  • ami: ami-00bb6a80f01f03502
  • instance type: t2-micro
  • subnet: subnet-067813a42fb6cbebe
  • key pair: my_idrsa
  • security group: docker
  • region: ap-south-1
• command

aws ec2 run-instances \
    --image-id "ami-00bb6a80f01f03502" \
    --instance-type "t2.micro" \
    --key-name "my_idrsa" \
    --subnet-id "subnet-067813a42fb6cbebe" \
    --tag-specifications "ResourceType=instance,Tags=[{Key=Name,Value=from-cli}]" \
    --associate-public-ip-address \
    --security-group-ids "sg-077690d1b4c7e9836"

• Lets start writing in script to create ec2

#!/bin/bash

# lets fail the scrip if number of arguments is not six
number=$#

if [[ $number -ne 6 ]]; then
    echo "wrong usage you are supposed to 6 arguments"
    echo ''' Try following command
    ./manageec2.sh ami-00bb6a80f01f03502 t2.micro my_idrsa subnet-067813a42fb6cbebe from-cli sg-077690d1b4c7e9836
    '''
    exit 1
fi

image_id=$1
instance_type=$2
key_name=$3
subnet_id=$4
name=$5
sg_id=$6


echo "number of arguments passed are ${number}"


# aws ec2 run-instances \
#     --image-id "ami-00bb6a80f01f03502" \
#     --instance-type "t2.micro" \
#     --key-name "my_idrsa" \
#     --subnet-id "subnet-067813a42fb6cbebe" \
#     --tag-specifications "ResourceType=instance,Tags=[{Key=Name,Value=from-cli}]" \
#     --associate-public-ip-address \
#     --security-group-ids "sg-077690d1b4c7e9836"


aws ec2 run-instances \
    --image-id ${image_id} \
    --instance-type ${instance_type} \
    --key-name ${key_name} \
    --subnet-id ${subnet_id} \
    --tag-specifications "ResourceType=instance,Tags=[{Key=Name,Value=${name}}]" \
    --associate-public-ip-address \
    --security-group-ids ${sg_id}

• Now write a script to stop the ec2 instance, try taking one input instance id
• Now write a script to start the ec2 instance, try taking one input instance id
• Now write a script to terminate the ec2 instance, try taking one input instance id

AWS CLI Output formats

• Refer Here for docs