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minitwit_swarm_cluster.tf
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# _ _
# | | ___ __ _ __| | ___ _ __
# | |/ _ \/ _` |/ _` |/ _ \ '__|
# | | __/ (_| | (_| | __/ |
# |_|\___|\__,_|\__,_|\___|_|
# create cloud vm
resource "digitalocean_droplet" "minitwit-swarm-leader" {
image = "docker-20-04" // ubuntu-22-04-x64
name = "minitwit-swarm-leader"
region = var.region
size = "s-1vcpu-1gb"
# add public ssh key so we can access the machine
ssh_keys = [digitalocean_ssh_key.minitwit.fingerprint]
# specify a ssh connection
connection {
user = "root"
host = self.ipv4_address
type = "ssh"
private_key = file(var.pvt_key)
timeout = "2m"
}
provisioner "file" {
source = "stack/minitwit_stack.yml"
destination = "/root/minitwit_stack.yml"
}
provisioner "remote-exec" {
inline = [
# allow ports for docker swarm
"ufw allow 2377/tcp",
"ufw allow 7946",
"ufw allow 4789/udp",
# ports for apps
"ufw allow 80",
"ufw allow 8080",
"ufw allow 8888",
# SSH
"ufw allow 22",
# initialize docker swarm cluster
"docker swarm init --advertise-addr ${self.ipv4_address}"
]
}
}
resource "null_resource" "swarm-worker-token" {
depends_on = [digitalocean_droplet.minitwit-swarm-leader]
# save the worker join token
provisioner "local-exec" {
command = "ssh -o 'ConnectionAttempts 3600' -o 'StrictHostKeyChecking no' root@${digitalocean_droplet.minitwit-swarm-leader.ipv4_address} -i ssh_key/terraform 'docker swarm join-token worker -q' > temp/worker_token"
}
}
resource "null_resource" "swarm-manager-token" {
depends_on = [digitalocean_droplet.minitwit-swarm-leader]
# save the manager join token
provisioner "local-exec" {
command = "ssh -o 'ConnectionAttempts 3600' -o 'StrictHostKeyChecking no' root@${digitalocean_droplet.minitwit-swarm-leader.ipv4_address} -i ssh_key/terraform 'docker swarm join-token manager -q' > temp/manager_token"
}
}
# _ __ ___ __ _ _ __ __ _ __ _ ___ _ __
# | '_ ` _ \ / _` | '_ \ / _` |/ _` |/ _ \ '__|
# | | | | | | (_| | | | | (_| | (_| | __/ |
# |_| |_| |_|\__,_|_| |_|\__,_|\__, |\___|_|
# |___/
# create cloud vm
resource "digitalocean_droplet" "minitwit-swarm-manager" {
# create managers after the leader
depends_on = [null_resource.swarm-manager-token]
# number of vms to create
count = 2
image = "docker-20-04"
name = "minitwit-swarm-manager-${count.index}"
region = var.region
size = "s-1vcpu-1gb"
# add public ssh key so we can access the machine
ssh_keys = [digitalocean_ssh_key.minitwit.fingerprint]
# specify a ssh connection
connection {
user = "root"
host = self.ipv4_address
type = "ssh"
private_key = file(var.pvt_key)
timeout = "2m"
}
provisioner "file" {
source = "temp/manager_token"
destination = "/root/manager_token"
}
provisioner "remote-exec" {
inline = [
# allow ports for docker swarm
"ufw allow 2377/tcp",
"ufw allow 7946",
"ufw allow 4789/udp",
# ports for apps
"ufw allow 80",
"ufw allow 8080",
"ufw allow 8888",
# SSH
"ufw allow 22",
# join swarm cluster as managers
"docker swarm join --token $(cat manager_token) ${digitalocean_droplet.minitwit-swarm-leader.ipv4_address}"
]
}
}
# _
# __ _____ _ __| | _____ _ __
# \ \ /\ / / _ \| '__| |/ / _ \ '__|
# \ V V / (_) | | | < __/ |
# \_/\_/ \___/|_| |_|\_\___|_|
#
# create cloud vm
resource "digitalocean_droplet" "minitwit-swarm-worker" {
# create workers after the leader
depends_on = [null_resource.swarm-worker-token]
# number of vms to create
count = 3
image = "docker-20-04"
name = "minitwit-swarm-worker-${count.index}"
region = var.region
size = "s-1vcpu-1gb"
# add public ssh key so we can access the machine
ssh_keys = [digitalocean_ssh_key.minitwit.fingerprint]
# specify a ssh connection
connection {
user = "root"
host = self.ipv4_address
type = "ssh"
private_key = file(var.pvt_key)
timeout = "2m"
}
provisioner "file" {
source = "temp/worker_token"
destination = "/root/worker_token"
}
provisioner "remote-exec" {
inline = [
# allow ports for docker swarm
"ufw allow 2377/tcp",
"ufw allow 7946",
"ufw allow 4789/udp",
# ports for apps
"ufw allow 80",
"ufw allow 8080",
"ufw allow 8888",
# SSH
"ufw allow 22",
# join swarm cluster as workers
"docker swarm join --token $(cat worker_token) ${digitalocean_droplet.minitwit-swarm-leader.ipv4_address}"
]
}
}
output "minitwit-swarm-leader-ip-address" {
value = digitalocean_droplet.minitwit-swarm-leader.ipv4_address
}
output "minitwit-swarm-manager-ip-address" {
value = digitalocean_droplet.minitwit-swarm-manager.*.ipv4_address
}
output "minitwit-swarm-worker-ip-address" {
value = digitalocean_droplet.minitwit-swarm-worker.*.ipv4_address
}