Configure A/A Tier-0 with Tier-1 and 3-tier app topology with Terraform

November 19, 2020by Raymond de Jong in Blog, NSX, Terraform tagged Automation, NSX, NSX-T, Terraform

This example shows how you can use the Terraform NSX-T Provider to quickly configure an Active-Active Tier-0 with a Tier-1 and a 3-tier app topology.

Also this Terraform NSX-T Provider example can be useful to quickly deploy a typical 3-tier application topology on a NSX-T environment to test and configures the following NSX-T objects:

Active-Active Tier-0 Gateway
Uplink interfaces on the Tier-0 Gateway
BGP Configuration on the Tier-0 Gateway,
BGP Neighbor Configuration with ECMP
Tier-1 Gateway
Route Advertisement rule on the Tier-1
Overlay Segments for the Web, App and DB tiers.
VLAN101 Segment for north-south traffic and BGP peering with ToR-A
VLAN102 Segment for north-south traffic and BGP peering with ToR-B
Local NSX-T DHCP Server for the Segments
Security Groups for the Web, App and DB tiers based on Tags
Custom Service (TCP 8443) for Web to App communication.
Distributed Firewall Rules for accessing the Application and communication between the tiers, including a default deny rule and using Applied To.

Requirements:

NSX Manager(s) ready and configured
Compute Manager configured
Overlay and VLAN Transport Zones configured
Two Edge Nodes configured
Edge Cluster configured with the two Edge Nodes as members.

Logical diagram of the topology:

Active/Active Tier-0 with Tier-1 Gateway

You can find the latest up-to-date code on my Github repository here:

https://github.com/raymonddejong/terraform-nsxt/tree/master/Active-Active

Below is the variables.tf file:

# Variables
# NSX Manager IP
variable "nsx_manager" {
  default = "10.29.12.206"
}

# Username & Password for NSX-T Manager
variable "username" {
  default = "admin"
}

variable "password" {
  default = "password"
}

# Transport Zones & MTU
variable "vlan_tz" {
  default = "VLAN-TZ"
}

variable "overlay_tz" {
  default = "Overlay-TZ"
}

variable "tier0_uplink_mtu" {
  default = "1500"
}


# Enter Edge Nodes Display Name. Required for external interfaces.
variable "edge_node_1" {
  default = "edge-01"
}
variable "edge_node_2" {
  default = "edge-02"
}

variable "edge_cluster" {
  default = "edge-cluster-01"
}

# Tier0 Gateway Configuration
variable "tier0_local_as" {
  default = 65005
}

variable "uplink_en1_fa_ip" {
  default = "192.168.101.254/24"
}

variable "uplink_en1_fb_ip" {
  default = "192.168.102.254/24"
}

variable "uplink_en2_fa_ip" {
  default = "192.168.101.253/24"
}

variable "uplink_en2_fb_ip" {
  default = "192.168.102.253/24"
}

variable "router_a_ip" {
  default = "192.168.101.1"
}

variable "router_b_ip" {
  default = "192.168.102.1"
}

variable "router_a_remote_as" {
  default = "65001"
}

variable "router_b_remote_as" {
  default = "65002"
}

variable "hold_down_time" {
  default = "180"
}

variable "keep_alive_time" {
  default = "60"
}

# Segment Names and Details
variable "segment_web" {
  default = "TF-Segment-Web"
}

variable "segment_app" {
  default = "TF-Segment-App"
}

variable "segment_db" {
  default = "TF-Segment-DB"
}

variable "segment_web_cidr" {
  default = "172.16.10.1/24"
}

variable "segment_app_cidr" {
  default = "172.16.20.1/24"
}

variable "segment_db_cidr" {
  default = "172.16.30.1/24"
}

# Security Group names
variable "nsx_group_web" {
  default = "Web Servers"
}

variable "nsx_group_app" {
  default = "App Servers"
}

variable "nsx_group_db" {
  default = "DB Servers"
}

variable "nsx_group_blue" {
  default = "Blue Application"
}

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# Variables

# NSX Manager IP

variable "nsx_manager" {

default = "10.29.12.206"

}

# Username & Password for NSX-T Manager

variable "username" {

default = "admin"

}

variable "password" {

default = "password"

}

# Transport Zones & MTU

variable "vlan_tz" {

default = "VLAN-TZ"

}

variable "overlay_tz" {

default = "Overlay-TZ"

}

variable "tier0_uplink_mtu" {

default = "1500"

}

# Enter Edge Nodes Display Name. Required for external interfaces.

variable "edge_node_1" {

default = "edge-01"

}

variable "edge_node_2" {

default = "edge-02"

}

variable "edge_cluster" {

default = "edge-cluster-01"

}

# Tier0 Gateway Configuration

variable "tier0_local_as" {

default = 65005

}

variable "uplink_en1_fa_ip" {

default = "192.168.101.254/24"

}

variable "uplink_en1_fb_ip" {

default = "192.168.102.254/24"

}

variable "uplink_en2_fa_ip" {

default = "192.168.101.253/24"

}

variable "uplink_en2_fb_ip" {

default = "192.168.102.253/24"

}

variable "router_a_ip" {

default = "192.168.101.1"

}

variable "router_b_ip" {

default = "192.168.102.1"

}

variable "router_a_remote_as" {

default = "65001"

}

variable "router_b_remote_as" {

default = "65002"

}

variable "hold_down_time" {

default = "180"

}

variable "keep_alive_time" {

default = "60"

}

# Segment Names and Details

variable "segment_web" {

default = "TF-Segment-Web"

}

variable "segment_app" {

default = "TF-Segment-App"

}

variable "segment_db" {

default = "TF-Segment-DB"

}

variable "segment_web_cidr" {

default = "172.16.10.1/24"

}

variable "segment_app_cidr" {

default = "172.16.20.1/24"

}

variable "segment_db_cidr" {

default = "172.16.30.1/24"

}

# Security Group names

variable "nsx_group_web" {

default = "Web Servers"

}

variable "nsx_group_app" {

default = "App Servers"

}

variable "nsx_group_db" {

default = "DB Servers"

}

variable "nsx_group_blue" {

default = "Blue Application"

}

Below is the main.tf file:

# NSX-T Manager Credentials
provider "nsxt" {
  host                  = var.nsx_manager
  username              = var.username
  password              = var.password
  allow_unverified_ssl  = true
  max_retries           = 10
  retry_min_delay       = 500
  retry_max_delay       = 5000
  retry_on_status_codes = [429]
}

# Data Sources we need for reference later
data "nsxt_policy_transport_zone" "overlay_tz" {
  display_name = var.overlay_tz
}

data "nsxt_policy_transport_zone" "vlan_tz" {
  display_name = var.vlan_tz
}

data "nsxt_policy_edge_cluster" "edge_cluster" {
  display_name = var.edge_cluster
}

data "nsxt_policy_service" "ssh" {
  display_name = "SSH"
}

data "nsxt_policy_service" "http" {
  display_name = "HTTP"
}

data "nsxt_policy_service" "https" {
  display_name = "HTTPS"
}

data "nsxt_policy_edge_node" "edge_node_1" {
  edge_cluster_path = data.nsxt_policy_edge_cluster.edge_cluster.path
  display_name      = var.edge_node_1
}

data "nsxt_policy_edge_node" "edge_node_2" {
  edge_cluster_path = data.nsxt_policy_edge_cluster.edge_cluster.path
  display_name      = var.edge_node_2
}


# Create NSX-T VLAN Segments
resource "nsxt_policy_vlan_segment" "vlan101" {
  display_name        = "VLAN101"
  description         = "VLAN Segment created by Terraform"
  transport_zone_path = data.nsxt_policy_transport_zone.vlan_tz.path
  vlan_ids            = ["101"]
}

resource "nsxt_policy_vlan_segment" "vlan102" {
  display_name        = "VLAN102"
  description         = "VLAN Segment created by Terraform"
  transport_zone_path = data.nsxt_policy_transport_zone.vlan_tz.path
  vlan_ids            = ["102"]
}

# Create Tier-0 Gateway
resource "nsxt_policy_tier0_gateway" "tier0_gw" {
  display_name         = "TF_Tier_0"
  description          = "Tier-0 provisioned by Terraform"
  failover_mode        = "NON_PREEMPTIVE"
  default_rule_logging = false
  enable_firewall      = false
  # force_whitelisting        = true
  ha_mode           = "ACTIVE_ACTIVE"
  edge_cluster_path = data.nsxt_policy_edge_cluster.edge_cluster.path

  bgp_config {
    ecmp            = true
    local_as_num    = var.tier0_local_as
    inter_sr_ibgp   = true
    multipath_relax = true
  }

  redistribution_config {
    enabled = true
    rule {
      name  = "t0-route-redistribution"
      types = ["TIER1_LB_VIP", "TIER1_CONNECTED", "TIER1_SERVICE_INTERFACE", "TIER1_NAT", "TIER1_LB_SNAT"]
    }
  }

  tag {
    scope = "color"
    tag   = "blue"
  }
}

# Create Tier-0 Gateway Uplink Interfaces

# Edge Node 1 - Fabric A - Router Port Configuration
resource "nsxt_policy_tier0_gateway_interface" "uplink_en1_fa" {
  display_name   = "uplink-en1-fa"
  description    = "Uplink Edge Node 1 - Fabric A"
  type           = "EXTERNAL"
  edge_node_path = data.nsxt_policy_edge_node.edge_node_1.path
  gateway_path   = nsxt_policy_tier0_gateway.tier0_gw.path
  segment_path   = nsxt_policy_vlan_segment.vlan101.path
  subnets        = [var.uplink_en1_fa_ip]
  mtu            = var.tier0_uplink_mtu
}

# Edge Node 1 - Fabric B - Router Port Configuration
resource "nsxt_policy_tier0_gateway_interface" "uplink_en1_fb" {
  display_name   = "uplink-en1-fb"
  description    = "Uplink Edge Node 1 - Fabric B"
  type           = "EXTERNAL"
  edge_node_path = data.nsxt_policy_edge_node.edge_node_1.path
  gateway_path   = nsxt_policy_tier0_gateway.tier0_gw.path
  segment_path   = nsxt_policy_vlan_segment.vlan102.path
  subnets        = [var.uplink_en1_fb_ip]
  mtu            = var.tier0_uplink_mtu
}

# Edge Node 2 - Fabric A - Router Port Configuration
resource "nsxt_policy_tier0_gateway_interface" "uplink_en2_fa" {
  display_name   = "uplink-en1-fa"
  description    = "Uplink Edge Node 2 - Fabric A"
  type           = "EXTERNAL"
  edge_node_path = data.nsxt_policy_edge_node.edge_node_2.path
  gateway_path   = nsxt_policy_tier0_gateway.tier0_gw.path
  segment_path   = nsxt_policy_vlan_segment.vlan101.path
  subnets        = [var.uplink_en2_fa_ip]
  mtu            = var.tier0_uplink_mtu
}

# Edge Node 2 - Fabric B - Router Port Configuration
resource "nsxt_policy_tier0_gateway_interface" "uplink_en2_fb" {
  display_name   = "uplink-en2-fb"
  description    = "Uplink Edge Node 2 - Fabric B"
  type           = "EXTERNAL"
  edge_node_path = data.nsxt_policy_edge_node.edge_node_2.path
  gateway_path   = nsxt_policy_tier0_gateway.tier0_gw.path
  segment_path   = nsxt_policy_vlan_segment.vlan102.path
  subnets        = [var.uplink_en2_fb_ip]
  mtu            = var.tier0_uplink_mtu
}

# Local definitions
locals {
  # Concatinate Uplink Source IP's for ToR-A Peering
  peer_a_source_addresses = concat(
    nsxt_policy_tier0_gateway_interface.uplink_en1_fa.ip_addresses,
    nsxt_policy_tier0_gateway_interface.uplink_en2_fa.ip_addresses
  )
  # Concatinate Uplink Source IP's for ToR-B Peering
  peer_b_source_addresses = concat(
    nsxt_policy_tier0_gateway_interface.uplink_en1_fb.ip_addresses,
    nsxt_policy_tier0_gateway_interface.uplink_en2_fb.ip_addresses
  )
}

# BGP Neighbor Configuration ToR-A
resource "nsxt_policy_bgp_neighbor" "router_a" {
  display_name     = "ToR-A"
  description      = "Terraform provisioned BGP Neighbor Configuration"
  bgp_path         = nsxt_policy_tier0_gateway.tier0_gw.bgp_config.0.path
  neighbor_address = var.router_a_ip
  remote_as_num    = var.router_a_remote_as
  hold_down_time   = var.hold_down_time
  keep_alive_time  = var.keep_alive_time
  source_addresses = local.peer_a_source_addresses
}

resource "nsxt_policy_bgp_neighbor" "router_b" {
  display_name     = "ToR-B"
  description      = "Terraform provisioned BGP Neighbor Configuration"
  bgp_path         = nsxt_policy_tier0_gateway.tier0_gw.bgp_config.0.path
  neighbor_address = var.router_b_ip
  remote_as_num    = var.router_b_remote_as
  hold_down_time   = var.hold_down_time
  keep_alive_time  = var.keep_alive_time
  source_addresses = local.peer_b_source_addresses
}

# Create Tier-1 Gateway
resource "nsxt_policy_tier1_gateway" "tier1_gw" {
  description               = "Tier-1 provisioned by Terraform"
  display_name              = "TF-Tier-1-01"
  nsx_id                    = "predefined_id"
  edge_cluster_path         = data.nsxt_policy_edge_cluster.edge_cluster.path
  failover_mode             = "NON_PREEMPTIVE"
  default_rule_logging      = "false"
  enable_firewall           = "true"
  enable_standby_relocation = "false"
  # force_whitelisting        = "false"
  tier0_path                = nsxt_policy_tier0_gateway.tier0_gw.path
  route_advertisement_types = ["TIER1_STATIC_ROUTES", "TIER1_CONNECTED"]

  tag {
    scope = "color"
    tag   = "blue"
  }

  route_advertisement_rule {
    name                      = "Tier 1 Networks"
    action                    = "PERMIT"
    subnets                   = ["172.16.10.0/24", "172.16.20.0/24", "172.16.30.0/24"]
    prefix_operator           = "GE"
    route_advertisement_types = ["TIER1_CONNECTED"]
  }
}

# DHCP Server
resource "nsxt_policy_dhcp_server" "dhcp_server" {
  display_name      = "DHCP Server"
  description       = "Terraform provisioned DHCP Server Config"
  edge_cluster_path = data.nsxt_policy_edge_cluster.edge_cluster.path
  lease_time        = 86400
}

# Create NSX-T Overlay Segments
resource "nsxt_policy_segment" "tf_segment_web" {
  display_name        = var.segment_web
  description         = "Segment created by Terraform"
  transport_zone_path = data.nsxt_policy_transport_zone.overlay_tz.path
  connectivity_path   = nsxt_policy_tier1_gateway.tier1_gw.path
  dhcp_config_path    = nsxt_policy_dhcp_server.dhcp_server.path

  subnet {
    cidr        = var.segment_web_cidr
    dhcp_ranges = ["172.16.10.10-172.16.10.100"]

    dhcp_v4_config {
      server_address = "172.16.10.254/24"
      lease_time     = 86400
      dns_servers    = ["10.29.12.197"]
    }
  }
}

resource "nsxt_policy_segment" "tf_segment_app" {
  display_name        = var.segment_app
  description         = "Segment created by Terraform"
  transport_zone_path = data.nsxt_policy_transport_zone.overlay_tz.path
  connectivity_path   = nsxt_policy_tier1_gateway.tier1_gw.path
  dhcp_config_path    = nsxt_policy_dhcp_server.dhcp_server.path

  subnet {
    cidr        = var.segment_app_cidr
    dhcp_ranges = ["172.16.20.10-172.16.20.100"]

    dhcp_v4_config {
      server_address = "172.16.20.254/24"
      lease_time     = 86400
      dns_servers    = ["10.29.12.197"]
    }
  }
}

resource "nsxt_policy_segment" "tf_segment_db" {
  display_name        = var.segment_db
  description         = "Segment created by Terraform"
  transport_zone_path = data.nsxt_policy_transport_zone.overlay_tz.path
  connectivity_path   = nsxt_policy_tier1_gateway.tier1_gw.path
  dhcp_config_path    = nsxt_policy_dhcp_server.dhcp_server.path

  subnet {
    cidr        = var.segment_db_cidr
    dhcp_ranges = ["172.16.30.50-172.16.30.100"]

    dhcp_v4_config {
      server_address = "172.16.30.254/24"
      lease_time     = 86400
      dns_servers    = ["10.29.12.197"]
    }
  }
}

# Create Security Groups
resource "nsxt_policy_group" "web_servers" {
  display_name = var.nsx_group_web
  description  = "Terraform provisioned Group"

  criteria {
    condition {
      key         = "Tag"
      member_type = "VirtualMachine"
      operator    = "CONTAINS"
      value       = "Web"
    }
  }
}

resource "nsxt_policy_group" "app_servers" {
  display_name = var.nsx_group_app
  description  = "Terraform provisioned Group"

  criteria {
    condition {
      key         = "Tag"
      member_type = "VirtualMachine"
      operator    = "CONTAINS"
      value       = "App"
    }
  }
}

resource "nsxt_policy_group" "db_servers" {
  display_name = var.nsx_group_db
  description  = "Terraform provisioned Group"

  criteria {
    condition {
      key         = "Tag"
      member_type = "VirtualMachine"
      operator    = "CONTAINS"
      value       = "DB"
    }
  }
}

resource "nsxt_policy_group" "blue_servers" {
  display_name = var.nsx_group_blue
  description  = "Terraform provisioned Group"

  criteria {
    condition {
      key         = "Tag"
      member_type = "VirtualMachine"
      operator    = "CONTAINS"
      value       = "Blue"
    }
  }
}

# Create Custom Services
resource "nsxt_policy_service" "service_tcp8443" {
  description  = "HTTPS service provisioned by Terraform"
  display_name = "TCP 8443"

  l4_port_set_entry {
    display_name      = "TCP8443"
    description       = "TCP port 8443 entry"
    protocol          = "TCP"
    destination_ports = ["8443"]
  }

  tag {
    scope = "color"
    tag   = "blue"
  }
}

# Create Security Policies

# DFW Infrastructure Category Rules
resource "nsxt_policy_security_policy" "Infrastructure" {
  display_name = "Infrastructure"
  description  = "Terraform provisioned Security Policy"
  category     = "Infrastructure"
  locked       = false
  stateful     = true
  tcp_strict   = false

  rule {
    display_name = "Allow DHCP"
    action       = "ALLOW"
    services     = ["/infra/services/DHCP-Server", "/infra/services/DHCP-Client"]
    logged       = false
    notes        = "Allow access to DHCP Server"
  }
}

# DFW Application Category Rules
resource "nsxt_policy_security_policy" "allow_blue" {
  display_name = "Allow Blue Application"
  description  = "Terraform provisioned Security Policy"
  category     = "Application"
  locked       = false
  stateful     = true
  tcp_strict   = false
  scope        = [nsxt_policy_group.web_servers.path]

  rule {
    display_name       = "Allow SSH to Blue Servers"
    destination_groups = [nsxt_policy_group.blue_servers.path]
    action             = "ALLOW"
    services           = [data.nsxt_policy_service.ssh.path]
    logged             = true
    scope              = [nsxt_policy_group.blue_servers.path]
  }

  rule {
    display_name       = "Allow HTTPS to Web Servers"
    destination_groups = [nsxt_policy_group.web_servers.path]
    action             = "ALLOW"
    services           = [data.nsxt_policy_service.https.path]
    logged             = true
    scope              = [nsxt_policy_group.web_servers.path]
  }

  rule {
    display_name       = "Allow TCP 8443 to App Servers"
    source_groups      = [nsxt_policy_group.web_servers.path]
    destination_groups = [nsxt_policy_group.app_servers.path]
    action             = "ALLOW"
    services           = [nsxt_policy_service.service_tcp8443.path]
    logged             = true
    scope              = [nsxt_policy_group.web_servers.path, nsxt_policy_group.app_servers.path]
  }

  rule {
    display_name       = "Allow HTTP to DB Servers"
    source_groups      = [nsxt_policy_group.app_servers.path]
    destination_groups = [nsxt_policy_group.db_servers.path]
    action             = "ALLOW"
    services           = [data.nsxt_policy_service.http.path]
    logged             = true
    scope              = [nsxt_policy_group.app_servers.path, nsxt_policy_group.db_servers.path]
  }

  rule {
    display_name = "Any Deny"
    action       = "REJECT"
    logged       = false
    scope        = [nsxt_policy_group.blue_servers.path]
  }
}

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# NSX-T Manager Credentials

provider "nsxt" {

host = var.nsx_manager

username = var.username

password = var.password

allow_unverified_ssl = true

max_retries = 10

retry_min_delay = 500

retry_max_delay = 5000

retry_on_status_codes = [429]

}

# Data Sources we need for reference later

data "nsxt_policy_transport_zone" "overlay_tz" {

display_name = var.overlay_tz

}

data "nsxt_policy_transport_zone" "vlan_tz" {

display_name = var.vlan_tz

}

data "nsxt_policy_edge_cluster" "edge_cluster" {

display_name = var.edge_cluster

}

data "nsxt_policy_service" "ssh" {

display_name = "SSH"

}

data "nsxt_policy_service" "http" {

display_name = "HTTP"

}

data "nsxt_policy_service" "https" {

display_name = "HTTPS"

}

data "nsxt_policy_edge_node" "edge_node_1" {

edge_cluster_path = data.nsxt_policy_edge_cluster.edge_cluster.path

display_name = var.edge_node_1

}

data "nsxt_policy_edge_node" "edge_node_2" {

edge_cluster_path = data.nsxt_policy_edge_cluster.edge_cluster.path

display_name = var.edge_node_2

}

# Create NSX-T VLAN Segments

resource "nsxt_policy_vlan_segment" "vlan101" {

display_name = "VLAN101"

description = "VLAN Segment created by Terraform"

transport_zone_path = data.nsxt_policy_transport_zone.vlan_tz.path

vlan_ids = ["101"]

}

resource "nsxt_policy_vlan_segment" "vlan102" {

display_name = "VLAN102"

description = "VLAN Segment created by Terraform"

transport_zone_path = data.nsxt_policy_transport_zone.vlan_tz.path

vlan_ids = ["102"]

}

# Create Tier-0 Gateway

resource "nsxt_policy_tier0_gateway" "tier0_gw" {

display_name = "TF_Tier_0"

description = "Tier-0 provisioned by Terraform"

failover_mode = "NON_PREEMPTIVE"

default_rule_logging = false

enable_firewall = false

# force_whitelisting = true

ha_mode = "ACTIVE_ACTIVE"

edge_cluster_path = data.nsxt_policy_edge_cluster.edge_cluster.path

bgp_config {

ecmp = true

local_as_num = var.tier0_local_as

inter_sr_ibgp = true

multipath_relax = true

}

redistribution_config {

enabled = true

rule {

name = "t0-route-redistribution"

types = ["TIER1_LB_VIP", "TIER1_CONNECTED", "TIER1_SERVICE_INTERFACE", "TIER1_NAT", "TIER1_LB_SNAT"]

}

tag {

scope = "color"

tag = "blue"

}

# Create Tier-0 Gateway Uplink Interfaces

# Edge Node 1 - Fabric A - Router Port Configuration

resource "nsxt_policy_tier0_gateway_interface" "uplink_en1_fa" {

display_name = "uplink-en1-fa"

description = "Uplink Edge Node 1 - Fabric A"

type = "EXTERNAL"

edge_node_path = data.nsxt_policy_edge_node.edge_node_1.path

gateway_path = nsxt_policy_tier0_gateway.tier0_gw.path

segment_path = nsxt_policy_vlan_segment.vlan101.path

subnets = [var.uplink_en1_fa_ip]

mtu = var.tier0_uplink_mtu

}

# Edge Node 1 - Fabric B - Router Port Configuration

resource "nsxt_policy_tier0_gateway_interface" "uplink_en1_fb" {

display_name = "uplink-en1-fb"

description = "Uplink Edge Node 1 - Fabric B"

type = "EXTERNAL"

edge_node_path = data.nsxt_policy_edge_node.edge_node_1.path

gateway_path = nsxt_policy_tier0_gateway.tier0_gw.path

segment_path = nsxt_policy_vlan_segment.vlan102.path

subnets = [var.uplink_en1_fb_ip]

mtu = var.tier0_uplink_mtu

}

# Edge Node 2 - Fabric A - Router Port Configuration

resource "nsxt_policy_tier0_gateway_interface" "uplink_en2_fa" {

display_name = "uplink-en1-fa"

description = "Uplink Edge Node 2 - Fabric A"

type = "EXTERNAL"

edge_node_path = data.nsxt_policy_edge_node.edge_node_2.path

gateway_path = nsxt_policy_tier0_gateway.tier0_gw.path

segment_path = nsxt_policy_vlan_segment.vlan101.path

subnets = [var.uplink_en2_fa_ip]

mtu = var.tier0_uplink_mtu

}

# Edge Node 2 - Fabric B - Router Port Configuration

resource "nsxt_policy_tier0_gateway_interface" "uplink_en2_fb" {

display_name = "uplink-en2-fb"

description = "Uplink Edge Node 2 - Fabric B"

type = "EXTERNAL"

edge_node_path = data.nsxt_policy_edge_node.edge_node_2.path

gateway_path = nsxt_policy_tier0_gateway.tier0_gw.path

segment_path = nsxt_policy_vlan_segment.vlan102.path

subnets = [var.uplink_en2_fb_ip]

mtu = var.tier0_uplink_mtu

}

# Local definitions

locals {

# Concatinate Uplink Source IP's for ToR-A Peering

peer_a_source_addresses = concat(

nsxt_policy_tier0_gateway_interface.uplink_en1_fa.ip_addresses,

nsxt_policy_tier0_gateway_interface.uplink_en2_fa.ip_addresses

)

# Concatinate Uplink Source IP's for ToR-B Peering

peer_b_source_addresses = concat(

nsxt_policy_tier0_gateway_interface.uplink_en1_fb.ip_addresses,

nsxt_policy_tier0_gateway_interface.uplink_en2_fb.ip_addresses

)

}

# BGP Neighbor Configuration ToR-A

resource "nsxt_policy_bgp_neighbor" "router_a" {

display_name = "ToR-A"

description = "Terraform provisioned BGP Neighbor Configuration"

bgp_path = nsxt_policy_tier0_gateway.tier0_gw.bgp_config.0.path

neighbor_address = var.router_a_ip

remote_as_num = var.router_a_remote_as

hold_down_time = var.hold_down_time

keep_alive_time = var.keep_alive_time

source_addresses = local.peer_a_source_addresses

}

resource "nsxt_policy_bgp_neighbor" "router_b" {

display_name = "ToR-B"

description = "Terraform provisioned BGP Neighbor Configuration"

bgp_path = nsxt_policy_tier0_gateway.tier0_gw.bgp_config.0.path

neighbor_address = var.router_b_ip

remote_as_num = var.router_b_remote_as

hold_down_time = var.hold_down_time

keep_alive_time = var.keep_alive_time

source_addresses = local.peer_b_source_addresses

}

# Create Tier-1 Gateway

resource "nsxt_policy_tier1_gateway" "tier1_gw" {

description = "Tier-1 provisioned by Terraform"

display_name = "TF-Tier-1-01"

nsx_id = "predefined_id"

edge_cluster_path = data.nsxt_policy_edge_cluster.edge_cluster.path

failover_mode = "NON_PREEMPTIVE"

default_rule_logging = "false"

enable_firewall = "true"

enable_standby_relocation = "false"

# force_whitelisting = "false"

tier0_path = nsxt_policy_tier0_gateway.tier0_gw.path

route_advertisement_types = ["TIER1_STATIC_ROUTES", "TIER1_CONNECTED"]

tag {

scope = "color"

tag = "blue"

}

route_advertisement_rule {

name = "Tier 1 Networks"

action = "PERMIT"

subnets = ["172.16.10.0/24", "172.16.20.0/24", "172.16.30.0/24"]

prefix_operator = "GE"

route_advertisement_types = ["TIER1_CONNECTED"]

}

# DHCP Server

resource "nsxt_policy_dhcp_server" "dhcp_server" {

display_name = "DHCP Server"

description = "Terraform provisioned DHCP Server Config"

edge_cluster_path = data.nsxt_policy_edge_cluster.edge_cluster.path

lease_time = 86400

}

# Create NSX-T Overlay Segments

resource "nsxt_policy_segment" "tf_segment_web" {

display_name = var.segment_web

description = "Segment created by Terraform"

transport_zone_path = data.nsxt_policy_transport_zone.overlay_tz.path

connectivity_path = nsxt_policy_tier1_gateway.tier1_gw.path

dhcp_config_path = nsxt_policy_dhcp_server.dhcp_server.path

subnet {

cidr = var.segment_web_cidr

dhcp_ranges = ["172.16.10.10-172.16.10.100"]

dhcp_v4_config {

server_address = "172.16.10.254/24"

lease_time = 86400

dns_servers = ["10.29.12.197"]

}

resource "nsxt_policy_segment" "tf_segment_app" {

display_name = var.segment_app

description = "Segment created by Terraform"

transport_zone_path = data.nsxt_policy_transport_zone.overlay_tz.path

connectivity_path = nsxt_policy_tier1_gateway.tier1_gw.path

dhcp_config_path = nsxt_policy_dhcp_server.dhcp_server.path

subnet {

cidr = var.segment_app_cidr

dhcp_ranges = ["172.16.20.10-172.16.20.100"]

dhcp_v4_config {

server_address = "172.16.20.254/24"

lease_time = 86400

dns_servers = ["10.29.12.197"]

}

resource "nsxt_policy_segment" "tf_segment_db" {

display_name = var.segment_db

description = "Segment created by Terraform"

transport_zone_path = data.nsxt_policy_transport_zone.overlay_tz.path

connectivity_path = nsxt_policy_tier1_gateway.tier1_gw.path

dhcp_config_path = nsxt_policy_dhcp_server.dhcp_server.path

subnet {

cidr = var.segment_db_cidr

dhcp_ranges = ["172.16.30.50-172.16.30.100"]

dhcp_v4_config {

server_address = "172.16.30.254/24"

lease_time = 86400

dns_servers = ["10.29.12.197"]

}

# Create Security Groups

resource "nsxt_policy_group" "web_servers" {

display_name = var.nsx_group_web

description = "Terraform provisioned Group"

criteria {

condition {

key = "Tag"

member_type = "VirtualMachine"

operator = "CONTAINS"

value = "Web"

}

resource "nsxt_policy_group" "app_servers" {

display_name = var.nsx_group_app

description = "Terraform provisioned Group"

criteria {

condition {

key = "Tag"

member_type = "VirtualMachine"

operator = "CONTAINS"

value = "App"

}

resource "nsxt_policy_group" "db_servers" {

display_name = var.nsx_group_db

description = "Terraform provisioned Group"

criteria {

condition {

key = "Tag"

member_type = "VirtualMachine"

operator = "CONTAINS"

value = "DB"

}

resource "nsxt_policy_group" "blue_servers" {

display_name = var.nsx_group_blue

description = "Terraform provisioned Group"

criteria {

condition {

key = "Tag"

member_type = "VirtualMachine"

operator = "CONTAINS"

value = "Blue"

}

# Create Custom Services

resource "nsxt_policy_service" "service_tcp8443" {

description = "HTTPS service provisioned by Terraform"

display_name = "TCP 8443"

l4_port_set_entry {

display_name = "TCP8443"

description = "TCP port 8443 entry"

protocol = "TCP"

destination_ports = ["8443"]

}

tag {

scope = "color"

tag = "blue"

}

# Create Security Policies

# DFW Infrastructure Category Rules

resource "nsxt_policy_security_policy" "Infrastructure" {

display_name = "Infrastructure"

description = "Terraform provisioned Security Policy"

category = "Infrastructure"

locked = false

stateful = true

tcp_strict = false

rule {

display_name = "Allow DHCP"

action = "ALLOW"

services = ["/infra/services/DHCP-Server", "/infra/services/DHCP-Client"]

logged = false

notes = "Allow access to DHCP Server"

}

# DFW Application Category Rules

resource "nsxt_policy_security_policy" "allow_blue" {

display_name = "Allow Blue Application"

description = "Terraform provisioned Security Policy"

category = "Application"

locked = false

stateful = true

tcp_strict = false

scope = [nsxt_policy_group.web_servers.path]

rule {

display_name = "Allow SSH to Blue Servers"

destination_groups = [nsxt_policy_group.blue_servers.path]

action = "ALLOW"

services = [data.nsxt_policy_service.ssh.path]

logged = true

scope = [nsxt_policy_group.blue_servers.path]

}

rule {

display_name = "Allow HTTPS to Web Servers"

destination_groups = [nsxt_policy_group.web_servers.path]

action = "ALLOW"

services = [data.nsxt_policy_service.https.path]

logged = true

scope = [nsxt_policy_group.web_servers.path]

}

rule {

display_name = "Allow TCP 8443 to App Servers"

source_groups = [nsxt_policy_group.web_servers.path]

destination_groups = [nsxt_policy_group.app_servers.path]

action = "ALLOW"

services = [nsxt_policy_service.service_tcp8443.path]

logged = true

scope = [nsxt_policy_group.web_servers.path, nsxt_policy_group.app_servers.path]

}

rule {

display_name = "Allow HTTP to DB Servers"

source_groups = [nsxt_policy_group.app_servers.path]

destination_groups = [nsxt_policy_group.db_servers.path]

action = "ALLOW"

services = [data.nsxt_policy_service.http.path]

logged = true

scope = [nsxt_policy_group.app_servers.path, nsxt_policy_group.db_servers.path]

}

rule {

display_name = "Any Deny"

action = "REJECT"

logged = false

scope = [nsxt_policy_group.blue_servers.path]

}

Configure A/A Tier-0 with Tier-1 and 3-tier app topology with Terraform

Configure A/A Tier-0 with Tier-1 and 3-tier app topology with Terraform

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Configure A/A Tier-0 with Tier-1 and 3-tier app topology with Terraform

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VCDX #284

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