common: Add host domain to /etc/hosts

JGoutin · Aug 26, 2024 · 7c09c78 · 7c09c78
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diff --git a/roles/common/README.md b/roles/common/README.md
@@ -84,6 +84,7 @@ packages.
 | `common_dns_servers`                                |                                                                                                              | Space-separated list of DNS servers to use, if not set will use the default value generally provided by the DHCP server. If `common_dns_over_tls` is set to `"yes"`, it is recommended to servers values to `address#server_name` to allow certificate validation.                                                                                                                                                                      |
 | `common_dns_servers_fallback`                       | `"1.1.1.1 9.9.9.9 1.0.0.1 149.112.112.112 2606:4700:4700::1111 2620:fe::fe 2606:4700:4700::1001 2620:fe::9"` | Space-separated list of fallback DNS servers to use. The default use Cloudflare and Quad9 DNS servers (Google is replaced for privacy reason).                                                                                                                                                                                                                                                                                          |
 | `common_dnssec`                                     |                                                                                                              | If `"yes"`, enforce DNSSEC validation locally, else use default configuration. The DNS server must support DNSSEC.                                                                                                                                                                                                                                                                                                                      |
+| `common_domain`                                     |                                                                                                              | Domain/FQDN of the current machine.                                                                                                                                                                                                                                                                                                                                                                                                     |
 | `common_fail2ban_action`                            | `%(action_mwl)s`                                                                                             | Fail2ban default action. By default, ban user and send mail with detailed logs to root.                                                                                                                                                                                                                                                                                                                                                 |
 | `common_grub_auto_hide`                             | false                                                                                                        | If `true` configure Grub to auto-hide.                                                                                                                                                                                                                                                                                                                                                                                                  |
 | `common_grub_cmdline_linux_default`                 |                                                                                                              | Space-separated list of extra Linux kernel options passed on boot using `GRUB_CMDLINE_LINUX_DEFAULT`.                                                                                                                                                                                                                                                                                                                                   |

diff --git a/roles/common/tasks/dns.yml b/roles/common/tasks/dns.yml
@@ -31,3 +31,11 @@
     name: systemd-resolved
     state: restarted
   changed_when: false
+
+- name: Ensure host domain is set in /etc/hosts with localhost IPv6
+  lineinfile:
+    path: /etc/hosts
+    regexp: '^::1\s+'
+    line: "::1         localhost localhost.localdomain localhost6 localhost6.localdomain6 {{ common_domain | default(omit) }}"
+    state: present
+  when: common_domain is defined