This blog post and demo shows how you can use the Terraform NSX-T Provider to quickly configure an Active-Standby Tier-0 with a Tier-1 and a typical 3-tier app topology.
VMware is working with Terraform on a NSX-T Provider which support Policy UI. This project is currently on Github and is not officially released by Terraform or VMware yet but ready to be used and tested.
This Terraform NSX-T Provider example can be useful to quickly deploy a typical 3-tier application topology on a NSX-T environment to configure and test the following NSX-T objects:
- Active-Standby Tier-0 Gateway
- Uplink interfaces on the Tier-0 Gateway
- BGP Configuration on the Tier-0 Gateway,
- BGP Neighbor Configuration
- 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
- 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.
Below a logical diagram of the target topology:
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.
Below is the variables.tf file:
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# Variables variable "nsx_manager" { default = "10.10.10.10" } # Username & Password for NSX-T Manager variable "username" { default = "admin" } variable "password" { default = "yourpassword" } # Enter Edge Nodes Display Name. Required for external interfaces. variable "edge_node_1" { default = "edge-01" } variable "edge_node_2" { default = "edge-02" } # Segment Names variable "nsx_segment_web" { default = "TF-Segment-Web" } variable "nsx_segment_app" { default = "TF-Segment-App" } variable "nsx_segment_db" { default = "TF-Segment-DB" } # 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:
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# Data Sources we need for reference later data "nsxt_policy_transport_zone" "overlay_tz" { display_name = "Overlay-TZ" } data "nsxt_policy_transport_zone" "vlan_tz" { display_name = "VLAN-TZ" } data "nsxt_policy_edge_cluster" "edge_cluster" { display_name = "TF" } 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 } # 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] } # 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_STANDBY" edge_cluster_path = data.nsxt_policy_edge_cluster.edge_cluster.path bgp_config { ecmp = false local_as_num = "65003" inter_sr_ibgp = false multipath_relax = false } tag { scope = "color" tag = "blue" } } # Create Tier-0 Gateway Uplink Interfaces resource "nsxt_policy_tier0_gateway_interface" "uplink1" { display_name = "Uplink-01" description = "Uplink to VLAN101" 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 = ["192.168.101.254/24"] mtu = 1500 } resource "nsxt_policy_tier0_gateway_interface" "uplink2" { display_name = "Uplink-02" description = "Uplink to VLAN102" 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 = ["192.168.102.254/24"] mtu = 1500 } # BGP Neighbor Configuration 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 = "192.168.101.1" remote_as_num = "65001" } 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 = "192.168.102.1" remote_as_num = "65002" } # 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 = "true" 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"] } } # Create NSX-T Overlay Segments resource "nsxt_policy_segment" "tf_segment_web" { display_name = var.nsx_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 subnet { cidr = "172.16.10.1/24" # dhcp_ranges = ["172.16.10.50-172.16.10.100"] # dhcp_v4_config { # lease_time = 36000 # dns_servers = ["10.29.12.197"] # } } } resource "nsxt_policy_segment" "tf_segment_app" { display_name = var.nsx_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 subnet { cidr = "172.16.20.1/24" } } resource "nsxt_policy_segment" "tf_segment_db" { display_name = var.nsx_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 subnet { cidr = "172.16.30.1/24" } } # 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 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] } } |
