148 lines
4.4 KiB
Python
148 lines
4.4 KiB
Python
import boto3
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################################################################################################
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#
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# Configuration Parameters
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#
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################################################################################################
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# place your credentials in ~/.aws/credentials, as mentioned in AWS Educate Classroom,
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# Account Details, AWC CLI -> Show (Copy and paste the following into ~/.aws/credentials)
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# changed to use us-east, to be able to use AWS Educate Classroom
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region = 'us-east-1'
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availabilityZone1 = 'us-east-1a'
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availabilityZone2 = 'us-east-1b'
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availabilityZone3 = 'us-east-1c'
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# region = 'eu-central-1'
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# availabilityZone = 'eu-central-1b'
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# AMI ID of Amazon Linux 2 image 64-bit x86 in us-east-1 (can be retrieved, e.g., at
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# https://console.aws.amazon.com/ec2/v2/home?region=us-east-1#LaunchInstanceWizard:)
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imageId = 'ami-0d5eff06f840b45e9'
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# for eu-central-1, AMI ID of Amazon Linux 2 would be:
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# imageId = 'ami-0cc293023f983ed53'
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# potentially change instanceType to t2.micro for "free tier" if using a regular account
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# for production, t3.nano seams better
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instanceType = 't2.nano'
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keyName = 'srieger-pub'
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################################################################################################
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#
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# boto3 code
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#
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################################################################################################
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client = boto3.setup_default_session(region_name=region)
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ec2Client = boto3.client("ec2")
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ec2Resource = boto3.resource('ec2')
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# if you only have one VPC, vpc_id can be retrieved using:
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response = ec2Client.describe_vpcs()
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vpc_id = response.get('Vpcs', [{}])[0].get('VpcId', '')
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# if you have more than one VPC, vpc_id should be specified, and code
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# top retrieve VPC id below needs to be commented out
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# vpc_id = 'vpc-eedd4187'
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subnet_id1 = ec2Client.describe_subnets(
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Filters=[
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{
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'Name': 'availability-zone', 'Values': [availabilityZone1]
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}
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])['Subnets'][0]['SubnetId']
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subnet_id2 = ec2Client.describe_subnets(
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Filters=[
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{
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'Name': 'availability-zone', 'Values': [availabilityZone2]
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}
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])['Subnets'][0]['SubnetId']
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subnet_id3 = ec2Client.describe_subnets(
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Filters=[
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{
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'Name': 'availability-zone', 'Values': [availabilityZone3]
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}
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])['Subnets'][0]['SubnetId']
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response = ec2Client.describe_security_groups(Filters=[{'Name': 'group-name', 'Values': ['tug-of-war']}])
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security_group_id = response.get('SecurityGroups', [{}])[0].get('GroupId', '')
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elbv2Client = boto3.client('elbv2')
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response = elbv2Client.create_load_balancer(
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Name='tug-of-war-loadbalancer',
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Subnets=[
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subnet_id1,
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subnet_id2,
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subnet_id3
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],
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SecurityGroups=[
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security_group_id
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]
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)
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loadbalancer_arn = response.get('LoadBalancers', [{}])[0].get('LoadBalancerArn', '')
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loadbalancer_dns = response.get('LoadBalancers', [{}])[0].get('DNSName', '')
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response = elbv2Client.create_target_group(
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Name='tug-of-war-targetgroup',
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Port=80,
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Protocol='HTTP',
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VpcId=vpc_id,
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)
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targetgroup_arn = response.get('TargetGroups', [{}])[0].get('TargetGroupArn', '')
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response = elbv2Client.create_listener(
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DefaultActions=[
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{
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'TargetGroupArn': targetgroup_arn,
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'Type': 'forward',
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},
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],
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LoadBalancerArn=loadbalancer_arn,
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Port=80,
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Protocol='HTTP',
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)
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response = elbv2Client.modify_target_group_attributes(
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TargetGroupArn=targetgroup_arn,
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Attributes=[
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{
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'Key': 'stickiness.enabled',
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'Value': 'true'
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},
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]
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)
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print("Registering instances...")
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print("------------------------------------")
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response = ec2Client.describe_instances(Filters=[{'Name': 'tag:tug-of-war', 'Values': ['webserver']}])
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print(response)
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reservations = response['Reservations']
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for reservation in reservations:
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for instance in reservation['Instances']:
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if instance['State']['Name'] == "running" or instance['State']['Name'] == "pending":
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response = elbv2Client.register_targets(
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TargetGroupArn=targetgroup_arn,
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Targets=[
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{
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'Id': instance['InstanceId'],
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},
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],
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)
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print('Waiting for Load Balancer to become available...')
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waiter = elbv2Client.get_waiter('load_balancer_available')
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waiter.wait(LoadBalancerArns=[loadbalancer_arn])
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print('Load Balancer should be reachable at: ' + loadbalancer_dns)
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