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__main__.py
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__main__.py
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# Copyright 2022, Pulumi Corporation.
import pulumi
import pulumi_aws as aws
import pulumi_command as command
config = pulumi.Config()
# A path to the EC2 keypair's public key:
public_key_path = config.require("publicKeyPath")
# A path to the EC2 keypair's private key:
private_key_path = config.require("privateKeyPath")
# The WordPress database size:
db_instance_size = config.get("dbInstanceSize") or "db.t3.small"
# The WordPress database name:
db_name = config.get("dbName") or "wordpressdb"
# The WordPress database user's name:
db_username = config.get("dbUsername") or "admin"
# The WordPress database user's password:
db_password = config.require_secret("dbPassword")
# The WordPress EC2 instance's size:
ec2_instance_size = config.get("ec2InstanceSize") or "t3.small"
# Dynamically fetch AZs so we can spread across them.
availability_zones = aws.get_availability_zones()
# Dynamically query for the Amazon Linux 2 AMI in this region.
aws_linux_ami = aws.ec2.get_ami(owners=["amazon"],
filters=[aws.ec2.GetAmiFilterArgs(
name="name",
values=["amzn2-ami-hvm-*-x86_64-ebs"],
)],
most_recent=True)
# Read in the public key for easy use below.
public_key = open(public_key_path).read()
# Read in the private key for easy use below (and to ensure it's marked a secret!)
private_key = pulumi.Output.secret(open(private_key_path).read())
# Set up a Virtual Private Cloud to deploy our EC2 instance and RDS datbase into.
prod_vpc = aws.ec2.Vpc("prod-vpc",
cidr_block="10.192.0.0/16",
enable_dns_support=True, # gives you an internal domain name
enable_dns_hostnames=True, # gives yoiu an internal host name
instance_tenancy="default")
# Create public subnets for the EC2 instance.
prod_subnet_public1 = aws.ec2.Subnet("prod-subnet-public-1",
vpc_id=prod_vpc.id,
cidr_block="10.192.0.0/24",
map_public_ip_on_launch=True,
availability_zone=availability_zones.names[0])
# Create private subnets for RDS:
prod_subnet_private1 = aws.ec2.Subnet("prod-subnet-private-1",
vpc_id=prod_vpc.id,
cidr_block="10.192.20.0/24",
map_public_ip_on_launch=False,
availability_zone=availability_zones.names[1])
prod_subnet_private2 = aws.ec2.Subnet("prod-subnet-private-2",
vpc_id=prod_vpc.id,
cidr_block="10.192.21.0/24",
map_public_ip_on_launch=False,
availability_zone=availability_zones.names[2])
# Create a gateway for internet connectivity:
prod_igw = aws.ec2.InternetGateway("prod-igw", vpc_id=prod_vpc.id)
# Create a route table:
prod_public_rt = aws.ec2.RouteTable("prod-public-rt",
vpc_id=prod_vpc.id,
routes=[aws.ec2.RouteTableRouteArgs(
# associated subnets can reach anywhere:
cidr_block="0.0.0.0/0",
# use this IGW to reach the internet:
gateway_id=prod_igw.id,
)])
prod_rta_public_subnet1 = aws.ec2.RouteTableAssociation("prod-rta-public-subnet-1",
subnet_id=prod_subnet_public1.id,
route_table_id=prod_public_rt.id)
# Security group for EC2:
ec2_allow_rule = aws.ec2.SecurityGroup("ec2-allow-rule",
vpc_id=prod_vpc.id,
ingress=[
aws.ec2.SecurityGroupIngressArgs(
description="HTTPS",
from_port=443,
to_port=443,
protocol="tcp",
cidr_blocks=["0.0.0.0/0"],
),
aws.ec2.SecurityGroupIngressArgs(
description="HTTP",
from_port=80,
to_port=80,
protocol="tcp",
cidr_blocks=["0.0.0.0/0"],
),
aws.ec2.SecurityGroupIngressArgs(
description="SSH",
from_port=22,
to_port=22,
protocol="tcp",
cidr_blocks=["0.0.0.0/0"],
),
],
egress=[aws.ec2.SecurityGroupEgressArgs(
from_port=0,
to_port=0,
protocol="-1",
cidr_blocks=["0.0.0.0/0"],
)],
tags={
"Name": "allow ssh,http,https",
})
# Security group for RDS:
rds_allow_rule = aws.ec2.SecurityGroup("rds-allow-rule",
vpc_id=prod_vpc.id,
ingress=[aws.ec2.SecurityGroupIngressArgs(
description="MySQL",
from_port=3306,
to_port=3306,
protocol="tcp",
security_groups=[ec2_allow_rule.id],
)],
# allow all outbound traffic.
egress=[aws.ec2.SecurityGroupEgressArgs(
from_port=0,
to_port=0,
protocol="-1",
cidr_blocks=["0.0.0.0/0"],
)],
tags={
"Name": "allow ec2",
})
# Place the RDS instance into private subnets:
rds_subnet_grp = aws.rds.SubnetGroup("rds-subnet-grp", subnet_ids=[
prod_subnet_private1.id,
prod_subnet_private2.id,
])
# Create the RDS instance:
wordpressdb = aws.rds.Instance("wordpressdb",
allocated_storage=10,
engine="mysql",
engine_version="5.7",
instance_class=db_instance_size,
db_subnet_group_name=rds_subnet_grp.id,
vpc_security_group_ids=[rds_allow_rule.id],
db_name=db_name,
username=db_username,
password=db_password,
skip_final_snapshot=True)
# Create a keypair to access the EC2 instance:
wordpress_keypair = aws.ec2.KeyPair("wordpress-keypair", public_key=public_key)
# Create an EC2 instance to run Wordpress (after RDS is ready).
wordpress_instance = aws.ec2.Instance("wordpress-instance",
ami=aws_linux_ami.id,
instance_type=ec2_instance_size,
subnet_id=prod_subnet_public1.id,
vpc_security_group_ids=[ec2_allow_rule.id],
key_name=wordpress_keypair.id,
tags={
"Name": "Wordpress.web",
},
# Only create after RDS is provisioned.
opts=pulumi.ResourceOptions(depends_on=[wordpressdb]))
# Give our EC2 instance an elastic IP address.
wordpress_eip = aws.ec2.Eip("wordpress-eip", instance=wordpress_instance.id)
# Render the Ansible playbook using RDS info.
render_playbook_cmd = command.local.Command("renderPlaybookCmd",
create="cat playbook.yml | envsubst > playbook_rendered.yml",
environment={
"DB_RDS": wordpressdb.endpoint,
"DB_NAME": db_name,
"DB_USERNAME": db_username,
"DB_PASSWORD": db_password,
})
# Run a script to update Python on the remote machine.
update_python_cmd = command.remote.Command("updatePythonCmd",
connection=command.remote.ConnectionArgs(
host=wordpress_eip.public_ip,
port=22,
user="ec2-user",
private_key=private_key,
),
create="""(sudo yum update -y || true);
(sudo yum install python35 -y);
(sudo yum install amazon-linux-extras -y)
""")
# Finally, play the Ansible playbook to finish installing.
play_ansible_playbook_cmd = command.local.Command("playAnsiblePlaybookCmd",
create=wordpress_eip.public_ip.apply(lambda public_ip: f"""\
ANSIBLE_HOST_KEY_CHECKING=False ansible-playbook \
-u ec2-user \
-i '{public_ip},' \
--private-key {private_key_path} \
playbook_rendered.yml"""),
opts=pulumi.ResourceOptions(depends_on=[
render_playbook_cmd,
update_python_cmd,
]))
# Export the resulting wordpress EIP for easy access.
pulumi.export("url", wordpress_eip.public_ip)