155 lines
6.2 KiB
Python
155 lines
6.2 KiB
Python
import time
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import boto3
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from botocore.exceptions import ClientError
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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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availabilityZone = 'us-east-1b'
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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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# TODO update to recent version of Amazon Linux 2 AMI?
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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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# as of SoSe 2022 t2.nano seams to be a bit too low on memory, mariadb first start can fail
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# due to innodb cache out of memory, therefore t2.micro or swap in t2.nano currently recommended
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# instanceType = 't2.nano'
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instanceType = 't2.micro'
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# keyName = 'srieger-pub'
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keyName = 'vockey'
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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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elbv2Client = boto3.client('elbv2')
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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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print("Getting DB IP...")
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print("------------------------------------")
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response = ec2Client.describe_instances(Filters=[{'Name': 'tag:tug-of-war', 'Values': ['db']}])
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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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instanceDB = ec2Resource.Instance(instance['InstanceId'])
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privateIpDB = instanceDB.private_ip_address
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userDataWebServer = ('#!/bin/bash\n'
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'# extra repo for RedHat rpms\n'
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'yum install -y https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm\n'
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'# essential tools\n'
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'yum install -y joe htop git\n'
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'# mysql\n'
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'yum install -y httpd php php-mysql\n'
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'\n'
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'service httpd start\n'
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'\n'
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# 'wget http://mmnet.informatik.hs-fulda.de/cloudcomp/tug-of-war-in-the-clouds.tar.gz\n'
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# 'cp tug-of-war-in-the-clouds.tar.gz /var/www/html/\n'
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# 'tar zxvf tug-of-war-in-the-clouds.tar.gz\n'
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'cd /var/www/html\n'
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'wget https://git-ce.rwth-aachen.de/sebastian.rieger/cloud-computing-msc-ai-examples/raw/master/example-projects/tug-of-war-in-the-clouds/web-content/index.php\n'
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'wget https://git-ce.rwth-aachen.de/sebastian.rieger/cloud-computing-msc-ai-examplesraw/master/example-projects/tug-of-war-in-the-clouds/web-content/cloud.php\n'
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'wget https://git-ce.rwth-aachen.de/sebastian.rieger/cloud-computing-msc-ai-examples/raw/master/example-projects/tug-of-war-in-the-clouds/web-content/config.php\n'
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'\n'
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'# change hostname of db connection\n'
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'sed -i s/localhost/' + privateIpDB + '/g /var/www/html/config.php\n'
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)
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for i in range(3, 4):
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print("Running new Web Server instance (in additional availability zone)...")
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print("-----------------------------------------------------------------------------------------")
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response = ec2Client.run_instances(
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ImageId=imageId,
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InstanceType=instanceType,
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Placement={'AvailabilityZone': availabilityZone, },
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KeyName=keyName,
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MinCount=1,
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MaxCount=1,
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UserData=userDataWebServer,
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SecurityGroupIds=[
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security_group_id,
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],
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TagSpecifications=[
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{
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'ResourceType': 'instance',
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'Tags': [
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{'Key': 'Name', 'Value': 'tug-of-war-webserver' + str(i)},
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{'Key': 'tug-of-war', 'Value': 'webserver'}
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],
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}
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],
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)
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instanceIdWeb = response['Instances'][0]['InstanceId']
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instance = ec2Resource.Instance(instanceIdWeb)
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instance.wait_until_running()
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instance.load()
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# sometimes even after reloading instance details, public IP cannot be retrieved using current boto3 version and
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# AWS Educate accounts, try for 10 secs, and ask user to get it from AWS console otherwise
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timeout = 10
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while instance.public_ip_address is None and timeout > 0:
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print("Waiting for public IP to become available...")
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instance.load()
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time.sleep(1)
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timeout -= 1
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if instance.public_ip_address is not None:
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print("tug-of-war-in-the-clouds can be accessed at: http://" + instance.public_ip_address)
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else:
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print("Could not get public IP using boto3, this is likely an AWS Educate problem. You can however lookup the "
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"public ip from the AWS management console.")
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print("Registering instance in load balancer, load balancer has to be already created...")
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print("-----------------------------------------------------------------------------------------")
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try:
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response = elbv2Client.describe_target_groups(Names=['tug-of-war-targetgroup'])
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targetgroup_arn = response.get('TargetGroups', [{}])[0].get('TargetGroupArn', '')
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except ClientError as e:
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print(e)
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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': instanceIdWeb,
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},
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],
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)
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