Update `/etc/dnsmasq.conf` & `/etc/systemd/resolved.conf` for `Ubuntu 22.04`.

cookbooks/consul/attributes.rb

@@ -13,7 +13,7 @@ else
 end
 ipaddr = run_command(cmd).stdout.chomp
 
-cmd = 'grep nameserver /run/systemd/resolve/resolv.conf | grep -v 8.8.8.8 | grep -v 127.0.0.1 | perl -pe "s/nameserver //g" | perl -pe "s/\n/ /g"'
+cmd = 'grep nameserver /run/systemd/resolve/resolv.conf | grep -v 8.8.8.8 | grep -v 127.0.0.1 | perl -pe "s/nameserver //g" | sort | uniq | perl -pe "s/\n/ /g"'
 dns = run_command(cmd).stdout.chomp
 
 node.reverse_merge!({

cookbooks/consul/dnsmasq.rb

@@ -7,7 +7,27 @@ package 'dnsmasq'
 end
 
 case run_command('grep VERSION_ID /etc/os-release | awk -F\" \'{print $2}\'').stdout.chomp
-when "20.04", "22.04"
+when "22.04"
+  template '/etc/systemd/resolved.conf' do
+    owner 'root'
+    group 'root'
+    mode '644'
+
+    source 'templates/etc/systemd/resolved.conf.2022.erb'
+    variables(dns: node['consul']['dns'])
+
+    notifies :restart, 'service[systemd-resolved]', :immediately
+  end
+
+  remote_file '/etc/dnsmasq.conf' do
+    owner 'root'
+    group 'root'
+    mode '644'
+
+    notifies :restart, 'service[dnsmasq]', :immediately
+  end
+
+when "20.04"
   template '/etc/systemd/resolved.conf' do
     owner 'root'
     group 'root'

cookbooks/consul/files/etc/dnsmasq.conf

@@ -63,7 +63,6 @@ strict-order
 
 # Add other name servers here, with domain specs if they are for
 # non-public domains.
-#server=/localnet/192.168.0.1
 server=/consul/127.0.0.1#8600
 
 # Example of routing PTR queries to nameservers: this will send all
@@ -91,7 +90,7 @@ server=/consul/127.0.0.1#8600
 # server=10.1.2.3@eth1
 
 # and this sets the source (ie local) address used to talk to
-# 10.1.2.3 to 192.168.1.1 port 55 (there must be a interface with that
+# 10.1.2.3 to 192.168.1.1 port 55 (there must be an interface with that
 # IP on the machine, obviously).
 # server=10.1.2.3@192.168.1.1#55
 
@@ -190,7 +189,7 @@ server=/consul/127.0.0.1#8600
 # add names to the DNS for the IPv6 address of SLAAC-configured dual-stack
 # hosts. Use the DHCPv4 lease to derive the name, network segment and
 # MAC address and assume that the host will also have an
-# IPv6 address calculated using the SLAAC alogrithm.
+# IPv6 address calculated using the SLAAC algorithm.
 #dhcp-range=1234::, ra-names
 
 # Do Router Advertisements, BUT NOT DHCP for this subnet.
@@ -211,7 +210,7 @@ server=/consul/127.0.0.1#8600
 #dhcp-range=1234::, ra-stateless, ra-names
 
 # Do router advertisements for all subnets where we're doing DHCPv6
-# Unless overriden by ra-stateless, ra-names, et al, the router
+# Unless overridden by ra-stateless, ra-names, et al, the router
 # advertisements will have the M and O bits set, so that the clients
 # get addresses and configuration from DHCPv6, and the A bit reset, so the
 # clients don't use SLAAC addresses.
@@ -252,7 +251,7 @@ server=/consul/127.0.0.1#8600
 # the IP address 192.168.0.60
 #dhcp-host=id:01:02:02:04,192.168.0.60
 
-# Always give the Infiniband interface with hardware address
+# Always give the InfiniBand interface with hardware address
 # 80:00:00:48:fe:80:00:00:00:00:00:00:f4:52:14:03:00:28:05:81 the
 # ip address 192.168.0.61. The client id is derived from the prefix
 # ff:00:00:00:00:00:02:00:00:02:c9:00 and the last 8 pairs of
@@ -289,7 +288,7 @@ server=/consul/127.0.0.1#8600
 # Give a fixed IPv6 address and name to client with
 # DUID 00:01:00:01:16:d2:83:fc:92:d4:19:e2:d8:b2
 # Note the MAC addresses CANNOT be used to identify DHCPv6 clients.
-# Note also the they [] around the IPv6 address are obilgatory.
+# Note also that the [] around the IPv6 address are obligatory.
 #dhcp-host=id:00:01:00:01:16:d2:83:fc:92:d4:19:e2:d8:b2, fred, [1234::5]
 
 # Ignore any clients which are not specified in dhcp-host lines
@@ -355,11 +354,11 @@ server=/consul/127.0.0.1#8600
 
 # Set option 58 client renewal time (T1). Defaults to half of the
 # lease time if not specified. (RFC2132)
-#dhcp-option=option:T1:1m
+#dhcp-option=option:T1,1m
 
 # Set option 59 rebinding time (T2). Defaults to 7/8 of the
 # lease time if not specified. (RFC2132)
-#dhcp-option=option:T2:2m
+#dhcp-option=option:T2,2m
 
 # Set the NTP time server address to be the same machine as
 # is running dnsmasq
@@ -437,22 +436,22 @@ server=/consul/127.0.0.1#8600
 #dhcp-option-force=211,30i
 
 # Set the boot filename for netboot/PXE. You will only need
-# this is you want to boot machines over the network and you will need
+# this if you want to boot machines over the network and you will need
-# a TFTP server; either dnsmasq's built in TFTP server or an
+# a TFTP server; either dnsmasq's built-in TFTP server or an
 # external one. (See below for how to enable the TFTP server.)
 #dhcp-boot=pxelinux.0
 
 # The same as above, but use custom tftp-server instead machine running dnsmasq
 #dhcp-boot=pxelinux,server.name,192.168.1.100
 
-# Boot for Etherboot gPXE. The idea is to send two different
+# Boot for iPXE. The idea is to send two different
-# filenames, the first loads gPXE, and the second tells gPXE what to
+# filenames, the first loads iPXE, and the second tells iPXE what to
-# load. The dhcp-match sets the gpxe tag for requests from gPXE.
+# load. The dhcp-match sets the ipxe tag for requests from iPXE.
-#dhcp-match=set:gpxe,175 # gPXE sends a 175 option.
+#dhcp-boot=undionly.kpxe
-#dhcp-boot=tag:!gpxe,undionly.kpxe
+#dhcp-match=set:ipxe,175 # iPXE sends a 175 option.
-#dhcp-boot=mybootimage
+#dhcp-boot=tag:ipxe,http://boot.ipxe.org/demo/boot.php
 
-# Encapsulated options for Etherboot gPXE. All the options are
+# Encapsulated options for iPXE. All the options are
 # encapsulated within option 175
 #dhcp-option=encap:175, 1, 5b         # priority code
 #dhcp-option=encap:175, 176, 1b       # no-proxydhcp
@@ -526,7 +525,7 @@ server=/consul/127.0.0.1#8600
 # (using /etc/hosts) then that name can be specified as the
 # tftp_servername (the third option to dhcp-boot) and in that
 # case dnsmasq resolves this name and returns the resultant IP
-# addresses in round robin fasion. This facility can be used to
+# addresses in round robin fashion. This facility can be used to
 # load balance the tftp load among a set of servers.
 #dhcp-boot=/var/ftpd/pxelinux.0,boothost,tftp_server_name
 
@@ -548,6 +547,14 @@ server=/consul/127.0.0.1#8600
 # http://www.isc.org/files/auth.html
 #dhcp-authoritative
 
+# Set the DHCP server to enable DHCPv4 Rapid Commit Option per RFC 4039.
+# In this mode it will respond to a DHCPDISCOVER message including a Rapid Commit
+# option with a DHCPACK including a Rapid Commit option and fully committed address
+# and configuration information. This must only be enabled if either the server is
+# the only server for the subnet, or multiple servers are present and they each
+# commit a binding for all clients.
+#dhcp-rapid-commit
+
 # Run an executable when a DHCP lease is created or destroyed.
 # The arguments sent to the script are "add" or "del",
 # then the MAC address, the IP address and finally the hostname
@@ -665,3 +672,8 @@ server=/consul/127.0.0.1#8600
 
 # Include all files in a directory which end in .conf
 #conf-dir=/etc/dnsmasq.d/,*.conf
+
+# If a DHCP client claims that its name is "wpad", ignore that.
+# This fixes a security hole. see CERT Vulnerability VU#598349
+#dhcp-name-match=set:wpad-ignore,wpad
+#dhcp-ignore-names=tag:wpad-ignore

cookbooks/consul/templates/etc/systemd/resolved.conf.2204.erb

@@ -0,0 +1,34 @@
+#  This file is part of systemd.
+#
+#  systemd is free software; you can redistribute it and/or modify it under the
+#  terms of the GNU Lesser General Public License as published by the Free
+#  Software Foundation; either version 2.1 of the License, or (at your option)
+#  any later version.
+#
+# Entries in this file show the compile time defaults. Local configuration
+# should be created by either modifying this file, or by creating "drop-ins" in
+# the resolved.conf.d/ subdirectory. The latter is generally recommended.
+# Defaults can be restored by simply deleting this file and all drop-ins.
+#
+# Use 'systemd-analyze cat-config systemd/resolved.conf' to display the full config.
+#
+# See resolved.conf(5) for details.
+
+[Resolve]
+# Some examples of DNS servers which may be used for DNS= and FallbackDNS=:
+# Cloudflare: 1.1.1.1#cloudflare-dns.com 1.0.0.1#cloudflare-dns.com 2606:4700:4700::1111#cloudflare-dns.com 2606:4700:4700::1001#cloudflare-dns.com
+# Google:     8.8.8.8#dns.google 8.8.4.4#dns.google 2001:4860:4860::8888#dns.google 2001:4860:4860::8844#dns.google
+# Quad9:      9.9.9.9#dns.quad9.net 149.112.112.112#dns.quad9.net 2620:fe::fe#dns.quad9.net 2620:fe::9#dns.quad9.net
+DNS=127.0.0.1 <%= @dns %> 8.8.8.8
+#FallbackDNS=
+#Domains=
+#DNSSEC=no
+#DNSOverTLS=no
+#MulticastDNS=no
+#LLMNR=no
+#Cache=no-negative
+#CacheFromLocalhost=no
+DNSStubListener=no
+#DNSStubListenerExtra=
+#ReadEtcHosts=yes
+#ResolveUnicastSingleLabel=no