gw0: Set dhcpcd_nodev

Disabling device management in `dhcpcd` avoids the "received NULL
device" log spam.

host_vars/gw0/network.yml

@@ -61,6 +61,7 @@ network:
     addr: 172.30.0.241
     prefix: 28
 
+dhcpcd_nodev: true
 dhcpcd_send_hostname: false
 dhcpcd_ntp_servers: false
 dhcpcd_noipv4: true

roles/dhcpcd/defaults/main.yml

@@ -11,3 +11,4 @@ dhcpcd_noipv4ll: false
 dhcpcd_noipv4: false
 dhcpcd_noipv6rs: false
 dhcpcd_interfaces: []
+dhcpcd_nodev: false

roles/dhcpcd/templates/dhcpcd.conf.j2

@@ -1,5 +1,10 @@
 # A sample configuration for dhcpcd.
 # See dhcpcd.conf(5) for details.
+{% if dhcpcd_nodev %}
+
+# Disable device management to avoid "libudev: received NULL device" log spam
+nodev
+{% endif %}
 
 # Allow users of this group to interact with dhcpcd via the control socket.
 {% if dhcpcd_controlgroup is defined %}