From 4b0b8adcddda60b40a712b9e064385d218d0f058 Mon Sep 17 00:00:00 2001
From: Markus Hauschild <markus@moepman.eu>
Date: Tue, 28 May 2024 17:48:42 +0200
Subject: [PATCH] kea: add ddns support

---
 roles/kea/handlers/main.yml                   |  3 ++
 roles/kea/tasks/main.yml                      | 12 +++++-
 roles/kea/templates/kea/kea-dhcp-ddns.conf.j2 | 38 +++++++++++++++++++
 roles/kea/templates/kea/kea-dhcp4.conf.j2     | 19 ++++++++++
 4 files changed, 71 insertions(+), 1 deletion(-)
 create mode 100644 roles/kea/templates/kea/kea-dhcp-ddns.conf.j2

diff --git a/roles/kea/handlers/main.yml b/roles/kea/handlers/main.yml
index fbd6145..7c33b95 100644
--- a/roles/kea/handlers/main.yml
+++ b/roles/kea/handlers/main.yml
@@ -3,5 +3,8 @@
 - name: Restart kea-dhcp4-server
   service: name=kea-dhcp4-server state=restarted
 
+- name: Restart kea-dhcp-ddns-server
+  service: name=kea-dhcp-ddns-server state=restarted
+
 - name: Restart kea-ctrl-agent
   service: name=kea-ctrl-agent state=restarted
diff --git a/roles/kea/tasks/main.yml b/roles/kea/tasks/main.yml
index 5ce8a17..3fc21e5 100644
--- a/roles/kea/tasks/main.yml
+++ b/roles/kea/tasks/main.yml
@@ -14,9 +14,19 @@
 #   validate: kea-dhcp4 -t %s
   notify: Restart kea-dhcp4-server
 
-- name: Start the kea dhcp server
+- name: Start the kea dhcp4 server
   service: name=kea-dhcp4-server state=started enabled=yes
 
+- name: Configure the kea dhcp-ddns server
+  template:
+    src: kea/kea-dhcp-ddns.conf.j2
+    dest: /etc/kea/kea-dhcp-ddns.conf
+#   validate: kea-dhcp-ddns -t %s
+  notify: Restart kea-dhcp-ddns-server
+
+- name: Start the kea dhcp-ddns server
+  service: name=kea-dhcp-ddns-server state=started enabled=yes
+
 - name: Configure the kea control agent
   template:
     src: kea/kea-ctrl-agent.conf.j2
diff --git a/roles/kea/templates/kea/kea-dhcp-ddns.conf.j2 b/roles/kea/templates/kea/kea-dhcp-ddns.conf.j2
new file mode 100644
index 0000000..eb5cf39
--- /dev/null
+++ b/roles/kea/templates/kea/kea-dhcp-ddns.conf.j2
@@ -0,0 +1,38 @@
+{
+"DhcpDdns": {
+    "ip-address": "127.0.0.1",
+    "port": 53001,
+    "control-socket": {
+        "socket-type": "unix",
+      "socket-name": "/run/kea/kea-ddns-ctrl-socket"
+    },
+
+    "forward-ddns": {
+        "ddns-domains": [
+            {
+                "name": "users.binary.kitchen.",
+                "dns-servers": [
+                    { "ip-address": "{{ dns_primary }}" }
+                ]
+            }
+        ]
+    },
+
+    "reverse-ddns": {
+    },
+
+    "loggers": [
+        {
+            "name": "kea-dhcp4",
+            "output_options": [
+                {
+                    "output": "stdout",
+                    "pattern": "%-5p %m\n"
+                }
+            ],
+            "severity": "INFO",
+            "debuglevel": 0
+        }
+    ]
+}
+}
diff --git a/roles/kea/templates/kea/kea-dhcp4.conf.j2 b/roles/kea/templates/kea/kea-dhcp4.conf.j2
index 47c0cb4..ab0cffd 100644
--- a/roles/kea/templates/kea/kea-dhcp4.conf.j2
+++ b/roles/kea/templates/kea/kea-dhcp4.conf.j2
@@ -10,6 +10,17 @@
         "socket-name": "/run/kea/kea4-ctrl-socket"
     },
 
+    "dhcp-ddns": {
+        "enable-updates": true,
+        "server-ip": "127.0.0.1",
+        "server-port": 53001,
+        "sender-ip": "",
+        "sender-port": 0,
+        "max-queue-size": 1024,
+        "ncr-protocol": "UDP",
+        "ncr-format": "JSON"
+    },
+
     "hooks-libraries": [
         {
             "library": "/usr/lib/x86_64-linux-gnu/kea/hooks/libdhcp_lease_cmds.so"
@@ -254,6 +265,14 @@
                 }
             ],
 
+            "ddns-send-updates": true,
+            "ddns-override-client-update": true,
+            "ddns-override-no-update": true,
+            "ddns-qualifying-suffix": "users.binary.kitchen",
+            "ddns-generated-prefix": "dhcp",
+            "ddns-replace-client-name": "when-not-present",
+            "ddns-update-on-renew": true,
+
             "reservations": [
                 {
                     "hw-address": "b8:27:eb:18:5c:11",