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terraform ssh setup

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miampf 2024-12-17 10:06:35 +01:00
parent c35d7f2157
commit 88c33c89c3
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1 changed files with 17 additions and 84 deletions
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101
terraform/infrastructure/azure/main.tf
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@ -40,6 +40,7 @@ locals {
{ name = "recovery", port = "9999", health_check_protocol = "Tcp", path = null, priority = 104 },
{ name = "join", port = "30090", health_check_protocol = "Tcp", path = null, priority = 105 },
var.debug ? [{ name = "debugd", port = "4000", health_check_protocol = "Tcp", path = null, priority = 106 }] : [],
var.emergency_ssh ? [{ name = "ssh", port = "22", health_check_protocol = "Tcp", path = null, priority = 107 }] : [],
])
// wildcard_lb_dns_name is the DNS name of the load balancer with a wildcard for the name.
// example: given "name-1234567890.location.cloudapp.azure.com" it will return "*.location.cloudapp.azure.com"
@ -296,89 +297,21 @@ data "azurerm_user_assigned_identity" "uaid" {
resource_group_name = local.uai_resource_group
}
############## For emergency ssh access ##############
resource "azurerm_public_ip" "loadbalancer_ssh_ip" {
count = var.emergency_ssh ? 1 : 0
name = "${local.name}-ssh-lb"
domain_name_label = "${local.name}-ssh"
resource_group_name = var.resource_group
location = var.location
allocation_method = "Static"
sku = "Standard"
tags = local.tags
# emergency ssh configuration files
resource "local_file" "ssh_config" {
filename = "./ssh_config"
file_permission = "0600"
content = <<EOF
Host proxy
HostName ${azurerm_public_ip.loadbalancer_ip[0].fqdn}
PreferredAuthentications publickey
IdentityFile ./emergency_ssh_key
User root
lifecycle {
ignore_changes = [name]
}
}
// Reads data from the resource of the same name.
// Used to wait to the actual resource to become ready, before using data from that resource.
// Property "fqdn" only becomes available on azurerm_public_ip resources once domain_name_label is set.
// Since we are setting domain_name_label starting with 2.10 we need to migrate
// resources for clusters created before 2.9. In those cases we need to wait until loadbalancer_ip has
// been updated before reading from it.
data "azurerm_public_ip" "loadbalancer_ssh_ip" {
count = var.emergency_ssh ? 1 : 0
name = "${local.name}-ssh-lb"
resource_group_name = var.resource_group
depends_on = [azurerm_public_ip.loadbalancer_ssh_ip]
}
resource "azurerm_lb" "loadbalancer_ssh" {
count = var.emergency_ssh ? 1 : 0
name = "${local.name}-ssh"
location = var.location
resource_group_name = var.resource_group
sku = "Standard"
tags = local.tags
dynamic "frontend_ip_configuration" {
for_each = var.emergency_ssh ? [1] : []
content {
name = "PublicIPAddress"
public_ip_address_id = azurerm_public_ip.loadbalancer_ssh_ip[0].id
}
}
}
module "loadbalancer_backend_control_plane_ssh" {
count = var.emergency_ssh ? 1 : 0
source = "./modules/load_balancer_backend"
name = "${local.name}-control-plane-ssh"
loadbalancer_id = azurerm_lb.loadbalancer_ssh[0].id
frontend_ip_configuration_name = azurerm_lb.loadbalancer_ssh[0].frontend_ip_configuration[0].name
ports = [{ name = "ssh-cp", port = "22", health_check_protocol = "Tcp", path = null, priority = 100 }]
}
module "loadbalancer_backend_worker_ssh" {
count = var.emergency_ssh ? 1 : 0
source = "./modules/load_balancer_backend"
name = "${local.name}-worker-ssh"
loadbalancer_id = azurerm_lb.loadbalancer_ssh[0].id
frontend_ip_configuration_name = azurerm_lb.loadbalancer_ssh[0].frontend_ip_configuration[0].name
ports = []
}
resource "azurerm_lb_backend_address_pool" "all_ssh" {
count = var.emergency_ssh ? 1 : 0
loadbalancer_id = azurerm_lb.loadbalancer_ssh[0].id
name = "${var.name}-all-ssh"
}
resource "azurerm_network_security_rule" "nsg_rule_ssh" {
count = var.emergency_ssh ? 1 : 0
name = "ssh-new"
priority = 210
direction = "Inbound"
access = "Allow"
protocol = "Tcp"
source_port_range = "*"
destination_port_range = "22"
source_address_prefix = "*"
destination_address_prefix = "*"
resource_group_name = var.resource_group
network_security_group_name = azurerm_network_security_group.security_group.name
Host 10.*
PreferredAuthentications publickey
IdentityFile ./emergency_ssh_key
User root
ProxyJump proxy
EOF
}