d13771d8c9
🔧 chore(terraform): modify user data script for manager instance to fetch instance metadata with token and start a netcat server on port 8080 to provide join token 🔧 chore(terraform): modify user data script for worker instance to fetch manager IP and join the swarm using the join token obtained from the manager on port 8080
77 lines
2.5 KiB
HCL
77 lines
2.5 KiB
HCL
variable "key_name" {}
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variable "vpc_id" {}
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variable "subnet_id" {}
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variable "security_group" {}
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variable "instance_type" {}
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variable "manager_count" {}
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variable "worker_count" {}
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resource "aws_instance" "manager" {
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count = var.manager_count
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ami = "ami-08a52ddb321b32a8c" # Amazon Linux 2 LTS
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instance_type = var.instance_type
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key_name = var.key_name
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vpc_security_group_ids = [var.security_group]
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subnet_id = var.subnet_id
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associate_public_ip_address = true
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user_data = <<-EOT
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#!/bin/bash
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sudo yum update -y
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sudo yum install -y docker
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sudo yum install -y nc
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sudo service docker start
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sudo usermod -a -G docker ec2-user
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sudo chkconfig docker on
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# Fetch instance metadata with token
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TOKEN=`curl -X PUT "http://169.254.169.254/latest/api/token" -H "X-aws-ec2-metadata-token-ttl-seconds: 21600"`
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IP_ADDR=$(curl -H "X-aws-ec2-metadata-token: $TOKEN" -v http://169.254.169.254/latest/meta-data/local-ipv4)
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docker swarm init --advertise-addr $IP_ADDR
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# Create a script to get the join token
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echo 'docker swarm join-token worker -q' > get_token.sh
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chmod +x get_token.sh
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while true; do { echo -e 'HTTP/1.1 200 OK\r\n'; ./get_token.sh; } | nc -l 8080; done &
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EOT
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tags = {
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Name = "manager-${count.index}"
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}
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}
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resource "aws_instance" "worker" {
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count = var.worker_count
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ami = "ami-08a52ddb321b32a8c" # Amazon Linux 2 LTS
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instance_type = var.instance_type
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key_name = var.key_name
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vpc_security_group_ids = [var.security_group]
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subnet_id = var.subnet_id
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associate_public_ip_address = true
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user_data = <<-EOT
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#!/bin/bash
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MANAGER_IP="${aws_instance.manager.0.private_ip}"
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sudo yum update -y
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sudo yum install -y docker
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sudo service docker start
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sudo usermod -a -G docker ec2-user
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sudo chkconfig docker on
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docker swarm join --token $(curl -s http://$MANAGER_IP:8080/token) $MANAGER_IP:2377
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EOT
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tags = {
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Name = "worker-${count.index}"
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}
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}
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output "manager_public_ips" {
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value = aws_instance.manager[*].public_ip
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}
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output "worker_public_ips" {
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value = aws_instance.worker[*].public_ip
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}
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