feat: support external cilium networking

terraform/templates/talconfig.yaml.tpl

@@ -2,6 +2,8 @@ clusterName: ${cluster_name}
 endpoint: ${cluster_endpoint}
 domain: ${cluster_domain}
 talosVersion: ${talos_version}
+cniConfig:
+  name: ${cni_name}
 allowSchedulingOnMasters: ${length(control_plane_nodes) == 1 ? "true" : "false"}
 
 # Network configuration
@@ -42,14 +44,18 @@ nodes:
     networkInterfaces:
 %{ for i, net in node.networks ~}
       - interface: eth${i}
-%{ if i == 0 ~}
+%{ if net.ip != null ~}
         addresses:
           - "${net.ip}/${split("/", net.cidr)[1]}"
+%{ if net.gateway != null ~}
         routes:
           - network: 0.0.0.0/0
             gateway: ${net.gateway}
+%{ endif ~}
+%{ if i == 0 ~}
         vip:
           ip: ${control_plane_vip}
+%{ endif ~}
 %{ else ~}
         dhcp: true
 %{ endif ~}
@@ -83,12 +89,14 @@ nodes:
     networkInterfaces:
 %{ for i, net in node.networks ~}
       - interface: eth${i}
-%{ if i == 0 ~}
+%{ if net.ip != null ~}
         addresses:
           - "${net.ip}/${split("/", net.cidr)[1]}"
+%{ if net.gateway != null ~}
         routes:
           - network: 0.0.0.0/0
             gateway: ${net.gateway}
+%{ endif ~}
 %{ else ~}
         dhcp: true
 %{ endif ~}
@@ -122,12 +130,14 @@ nodes:
     networkInterfaces:
 %{ for i, net in node.networks ~}
       - interface: eth${i}
-%{ if i == 0 ~}
+%{ if net.ip != null ~}
         addresses:
           - "${net.ip}/${split("/", net.cidr)[1]}"
+%{ if net.gateway != null ~}
         routes:
           - network: 0.0.0.0/0
             gateway: ${net.gateway}
+%{ endif ~}
 %{ else ~}
         dhcp: true
 %{ endif ~}
@@ -161,12 +171,14 @@ nodes:
     networkInterfaces:
 %{ for i, net in node.networks ~}
       - interface: eth${i}
-%{ if i == 0 ~}
+%{ if net.ip != null ~}
         addresses:
           - "${net.ip}/${split("/", net.cidr)[1]}"
+%{ if net.gateway != null ~}
         routes:
           - network: 0.0.0.0/0
             gateway: ${net.gateway}
+%{ endif ~}
 %{ else ~}
         dhcp: true
 %{ endif ~}

terraform/variables.tf

@@ -45,9 +45,9 @@ variable "talos_factory_schematic_id" {
 }
 
 variable "cni_name" {
-  description = "The name of the CNI to configure (e.g., 'flannel', 'cilium')."
+  description = "The built-in Talos CNI to configure; use 'none' when Flux installs Cilium."
   type        = string
-  default     = "flannel"
+  default     = "none"
 }
 
 # --- Global Network Configuration ---