networkd-to-ifconfig: add variables for configuration by variables

CHANGELOG.md

@@ -35,6 +35,7 @@ The **patch** part changes incrementally at each release.
 * mysql-oracle: backport tasks from mysql role
 * mysql: activate binary logs by specifying log_bin path
 * mysql: specify a custom server_id
+* networkd-to-ifconfig: add variables for configuration by variables
 * packweb-apache: Deploy opcache.php to give some insights on PHP's opcache status
 * php: variable to install the mysqlnd module instead of the default mysql module
 * postgresql : variable to install PostGIS (default: `False`)

networkd-to-ifconfig/defaults/main.yml

@@ -0,0 +1,9 @@
+---
+
+force_update_eni_file: False
+eni_interface_name: Null
+eni_ipv4_address: Null
+eni_ipv4_gateway: Null
+eni_ipv6_address: Null
+eni_ipv6_gateway: Null
+ipv6_gateway_mask: "xxxx.xxxx.xxxx.xxFF:FF:FF:FF:FF"

networkd-to-ifconfig/tasks/main.yml

@@ -7,26 +7,38 @@
 
 - debug:
     msg: A /etc/network/interfaces file already exists, nothing is done.
-  when: interfaces_file.stat.exists
+  when: interfaces_file.stat.exists and not force_update_eni_file
 
 - block:
-  - name: "Parse addresses"
-    shell: "grep Address= /etc/systemd/network/50-default.network | cut -d'=' -f2"
-    register: network_address_grep
-    check_mode: no
-    
-  - name: "Parse gateways"
-    shell: "grep Gateway= /etc/systemd/network/50-default.network | cut -d'=' -f2"
-    register: network_gateway_grep
-    check_mode: no
-
-  - name: Prepare variables
+  - name: "Look for systemd network config"
+    stat:
+      path: /etc/systemd/network/50-default.network
+    register: systemd_network_file
+
+  - name: Set interface name
     set_fact:
       eni_interface_name: "{{ ansible_default_ipv4.interface }}"
-      eni_ipv4_address: "{{ network_address_grep.stdout_lines | ipv4 | first }}"
-      eni_ipv4_gateway: "{{ network_gateway_grep.stdout_lines | ipv4 | first }}"
-      eni_ipv6_address: "{{ network_address_grep.stdout_lines | ipv6 | first }}"
-      eni_ipv6_gateway: "{{ network_gateway_grep.stdout_lines | ipv6 | first }}"
+
+  - include: set_facts_from_systemd.yml
+    when: systemd_network_file.stat.exists
+
+  - include: set_facts_from_ansible.yml
+    when: not systemd_network_file.stat.exists
+
+  - name: Check config (IPv4)
+    assert:
+      that:
+        - eni_ipv4_address | ipv4
+        - eni_ipv4_gateway | ipv4
+      msg: "IPv4 configuration is invalid"
+
+  - name: Check config (IPV6)
+    assert:
+      that:
+        - eni_ipv6_address | ipv6
+        - eni_ipv6_gateway | ipv6
+      msg: "IPv6 configuration is invalid"
+    when: eni_ipv6_address or eni_ipv6_gateway
 
   - name: "A new /etc/network/interfaces is generated"
     template:
@@ -48,7 +60,7 @@
       enabled: True
       state: restarted
     ignore_errors: True
-  
+
   - debug:
       msg: You should verify your configuration, then reboot the server.
-  when: not interfaces_file.stat.exists
+  when: force_update_eni_file or not interfaces_file.stat.exists

networkd-to-ifconfig/tasks/set_facts_from_ansible.yml

@@ -0,0 +1,13 @@
+---
+
+- name: Prepare variables (IPv4)
+  set_fact:
+    eni_ipv4_address: "{{ ansible_default_ipv4.address | ipv4 }}"
+    eni_ipv4_gateway: "{{ ansible_default_ipv4.gateway | ipv4 }}"
+  when: ansible_default_ipv4
+
+- name: Prepare variables (IPv6)
+  set_fact:
+    eni_ipv6_address: "{{ ansible_default_ipv6.address | ipv6 | first }}"
+    eni_ipv6_gateway: "{{ ansible_default_ipv6.gateway | ipv6 | first }}"
+  when: ansible_default_ipv6

networkd-to-ifconfig/tasks/set_facts_from_systemd.yml

@@ -0,0 +1,18 @@
+---
+
+- name: "Parse addresses"
+  shell: "grep Address= /etc/systemd/network/50-default.network | cut -d'=' -f2"
+  register: network_address_grep
+  check_mode: no
+
+- name: "Parse gateways"
+  shell: "grep Gateway= /etc/systemd/network/50-default.network | cut -d'=' -f2"
+  register: network_gateway_grep
+  check_mode: no
+
+- name: Prepare variables
+  set_fact:
+    eni_ipv4_address: "{{ network_address_grep.stdout_lines | ipv4 | first }}"
+    eni_ipv4_gateway: "{{ network_gateway_grep.stdout_lines | ipv4 | first }}"
+    eni_ipv6_address: "{{ network_address_grep.stdout_lines | ipv6 | first }}"
+    eni_ipv6_gateway: "{{ network_gateway_grep.stdout_lines | ipv6 | first }}"

networkd-to-ifconfig/templates/interfaces.j2

@@ -10,8 +10,13 @@ iface {{ eni_interface_name }} inet static
   address {{ eni_ipv4_address }}
   gateway {{ eni_ipv4_gateway }}
 
+{% if eni_ipv6_address and eni_ipv6_gateway %}
 iface {{ eni_interface_name }} inet6 static
   address {{ eni_ipv6_address }}
-  gateway {{ eni_ipv6_gateway }}
-  post-up /sbin/ip -6 route add {{ eni_ipv6_gateway }} dev {{ eni_interface_name }}
-  post-up /sbin/ip -6 route add default via IPV6
+  netmask 128
+
+post-up /sbin/ip -f inet6 route add {{ eni_ipv6_gateway }} dev {{ eni_interface_name }}
+post-up /sbin/ip -f inet6 route add default via {{ eni_ipv6_address }}
+pre-down /sbin/ip -f inet6 route del {{ eni_ipv6_gateway }} dev {{ eni_interface_name }}
+pre-down /sbin/ip -f inet6 route del default via {{ eni_ipv6_gateway }}
+{% endif %}