feat: use template for configuration

Author: escalate

defaults/main.yml

@@ -1,6 +1,4 @@
-dhcpcd_static_ip_configuration: |
-  # interface eth0
-  # static ip_address=192.168.0.10/24
-  # static ip6_address=fd51:42f8:caae:d92e::ff/64
-  # static routers=192.168.0.1
-  # static domain_name_servers=192.168.0.1 8.8.8.8 fd51:42f8:caae:d92e::1
+dhcpcd_static_ipv4_configuration_enabled: false
+dhcpcd_static_ipv4_address: 192.168.0.10/24
+dhcpcd_static_ipv4_gateway: 192.168.0.1
+dhcpcd_static_ipv4_domain_name_server: 192.168.0.1

molecule/default/converge.yml

@@ -1,11 +1,10 @@
 - name: Converge
   hosts: all
   vars:
-    dhcpcd_static_ip_configuration: |
-      interface eth0
-      static ip_address={{ ansible_default_ipv4.address }}/16
-      static routers={{ ansible_default_ipv4.gateway }}
-      static domain_name_servers={{ ansible_dns.nameservers[0] }}
+    dhcpcd_static_ipv4_configuration_enabled: true
+    dhcpcd_static_ipv4_address: "{{ ansible_default_ipv4.address }}/16"
+    dhcpcd_static_ipv4_gateway: "{{ ansible_default_ipv4.gateway }}"
+    dhcpcd_static_ipv4_domain_name_server: "{{ ansible_dns.nameservers[0] }}"
   roles:
     - role: ansible-raspberry-dhcpcd
       tags: dhcpcd

tasks/main.yml

@@ -4,10 +4,13 @@
     state: present
     update_cache: true
 
-- name: Configure static IP address
-  ansible.builtin.blockinfile:
+- name: Create service configuration
+  ansible.builtin.template:
+    src: dhcpcd.conf.j2
     dest: /etc/dhcpcd.conf
-    block: "{{ dhcpcd_static_ip_configuration }}"
+    owner: root
+    group: root
+    mode: 0644
   notify: Restart dhcpcd service
 
 - name: Start and enable service

templates/dhcpcd.conf.j2

@@ -0,0 +1,49 @@
+# A sample configuration for dhcpcd.
+# See dhcpcd.conf(5) for details.
+
+# Allow users of this group to interact with dhcpcd via the control socket.
+#controlgroup wheel
+
+# Inform the DHCP server of our hostname for DDNS.
+hostname
+
+# Use the hardware address of the interface for the Client ID.
+clientid
+# or
+# Use the same DUID + IAID as set in DHCPv6 for DHCPv4 ClientID as per RFC4361.
+# Some non-RFC compliant DHCP servers do not reply with this set.
+# In this case, comment out duid and enable clientid above.
+#duid
+
+# Persist interface configuration when dhcpcd exits.
+persistent
+
+# Rapid commit support.
+# Safe to enable by default because it requires the equivalent option set
+# on the server to actually work.
+option rapid_commit
+
+# A list of options to request from the DHCP server.
+option domain_name_servers, domain_name, domain_search, host_name
+option classless_static_routes
+# Respect the network MTU. This is applied to DHCP routes.
+option interface_mtu
+
+# Most distributions have NTP support.
+#option ntp_servers
+
+# A ServerID is required by RFC2131.
+require dhcp_server_identifier
+
+# Generate SLAAC address using the Hardware Address of the interface
+#slaac hwaddr
+# OR generate Stable Private IPv6 Addresses based from the DUID
+slaac private
+{% if dhcpcd_static_ipv4_configuration_enabled %}
+
+# Static IPv4 configuration
+interface eth0
+static ip_address={{ dhcpcd_static_ipv4_address }}
+static routers={{ dhcpcd_static_ipv4_gateway }}
+static domain_name_servers={{ dhcpcd_static_ipv4_domain_name_server }}
+{% endif %}