dhcp: T3316: Migrate dhcp/dhcpv6 server to Kea

6 files changed, 134 insertions, 412 deletions

diff --git a/data/templates/dhcp-server/10-override.conf.j2 b/data/templates/dhcp-server/10-override.conf.j2
deleted file mode 100644
index 1504b6808..000000000
--- a/data/templates/dhcp-server/10-override.conf.j2
+++ /dev/null
@@ -1,30 +0,0 @@
-### Autogenerated by dhcp_server.py ###
-{% set lease_file = '/config/dhcpd.leases' %}
-[Unit]
-Description=ISC DHCP IPv4 server
-Documentation=man:dhcpd(8)
-RequiresMountsFor=/run
-ConditionPathExists=
-ConditionPathExists=/run/dhcp-server/dhcpd.conf
-After=
-After=vyos-router.service
-
-[Service]
-Type=forking
-WorkingDirectory=
-WorkingDirectory=/run/dhcp-server
-RuntimeDirectory=dhcp-server
-RuntimeDirectoryPreserve=yes
-Environment=PID_FILE=/run/dhcp-server/dhcpd.pid CONFIG_FILE=/run/dhcp-server/dhcpd.conf LEASE_FILE={{ lease_file }}
-PIDFile=/run/dhcp-server/dhcpd.pid
-ExecStartPre=/bin/sh -ec '\
-touch ${LEASE_FILE}; \
-chown dhcpd:vyattacfg ${LEASE_FILE}* ; \
-chmod 664 ${LEASE_FILE}* ; \
-/usr/sbin/dhcpd -4 -t -T -q -user dhcpd -group vyattacfg -pf ${PID_FILE} -cf ${CONFIG_FILE} -lf ${LEASE_FILE} '
-ExecStart=
-ExecStart=/usr/sbin/dhcpd -4 -q -user dhcpd -group vyattacfg -pf ${PID_FILE} -cf ${CONFIG_FILE} -lf ${LEASE_FILE}
-Restart=always
-
-[Install]
-WantedBy=multi-user.target
diff --git a/data/templates/dhcp-server/dhcpd.conf.j2 b/data/templates/dhcp-server/dhcpd.conf.j2
deleted file mode 100644
index 639526532..000000000
--- a/data/templates/dhcp-server/dhcpd.conf.j2
+++ /dev/null
@@ -1,250 +0,0 @@
-### Autogenerated by dhcp_server.py ###
-
-# For options please consult the following website:
-# https://www.isc.org/wp-content/uploads/2017/08/dhcp43options.html
-#
-# log-facility local7;
-{% if hostfile_update is vyos_defined %}
-on release {
-    set ClientName = pick-first-value(host-decl-name, option fqdn.hostname, option host-name);
-    set ClientIp = binary-to-ascii(10, 8, ".",leased-address);
-    execute("/usr/libexec/vyos/system/on-dhcp-event.sh", "release", "", ClientIp, "", "");
-}
-on expiry {
-    set ClientName = pick-first-value(host-decl-name, option fqdn.hostname, option host-name);
-    set ClientIp = binary-to-ascii(10, 8, ".",leased-address);
-    execute("/usr/libexec/vyos/system/on-dhcp-event.sh", "release", "", ClientIp, "", "");
-}
-{% endif %}
-
-{{ 'use-host-decl-names on;' if host_decl_name is vyos_defined }}
-ddns-update-style {{ 'interim' if dynamic_dns_update is vyos_defined else 'none' }};
-option rfc3442-static-route code 121 = array of integer 8;
-option windows-static-route code 249 = array of integer 8;
-option wpad-url code 252 = text;
-option rfc8925-ipv6-only-preferred code 108 = unsigned integer 32;
-
-# Vendor specific options - Ubiquiti Networks
-option space ubnt;
-option ubnt.unifi-controller code 1 = ip-address;
-class "ubnt" {
-    match if substring (option vendor-class-identifier , 0, 4) = "ubnt";
-    option vendor-class-identifier "ubnt";
-    vendor-option-space ubnt;
-}
-
-{% if global_parameters is vyos_defined %}
-# The following {{ global_parameters | length }} line(s) have been added as
-# global-parameters in the CLI and have not been validated !!!
-{%     for parameter in global_parameters %}
-{{ parameter }}
-{%     endfor %}
-
-{% endif %}
-{% if failover is vyos_defined %}
-# DHCP failover configuration
-failover peer "{{ failover.name }}" {
-{%     if failover.status == 'primary' %}
-    primary;
-    mclt 1800;
-    split 128;
-{%     elif failover.status == 'secondary' %}
-    secondary;
-{%     endif %}
-    address {{ failover.source_address }};
-    port 647;
-    peer address {{ failover.remote }};
-    peer port 647;
-    max-response-delay 30;
-    max-unacked-updates 10;
-    load balance max seconds 3;
-}
-{% endif %}
-{% if listen_address is vyos_defined %}
-
-# DHCP server serving relay subnet, we need a connector to the real world
-{%     for address in listen_address %}
-# Connected subnet statement for listen-address {{ address }}
-subnet {{ address | network_from_ipv4 }} netmask {{ address | netmask_from_ipv4 }} { }
-{%     endfor %}
-{% endif %}
-
-# Shared network configration(s)
-{% if shared_network_name is vyos_defined %}
-{%     for network, network_config in shared_network_name.items() if network_config.disable is not vyos_defined %}
-shared-network {{ network }} {
-{%         if network_config.authoritative is vyos_defined %}
-    authoritative;
-{%         endif %}
-{%         if network_config.name_server is vyos_defined %}
-    option domain-name-servers {{ network_config.name_server | join(', ') }};
-{%         endif %}
-{%         if network_config.domain_name is vyos_defined %}
-    option domain-name "{{ network_config.domain_name }}";
-{%         endif %}
-{%         if network_config.domain_search is vyos_defined %}
-    option domain-search "{{ network_config.domain_search | join('", "') }}";
-{%         endif %}
-{%         if network_config.ntp_server is vyos_defined %}
-    option ntp-servers {{ network_config.ntp_server | join(', ') }};
-{%         endif %}
-{%         if network_config.ping_check is vyos_defined %}
-    ping-check true;
-{%         endif %}
-{%         if network_config.shared_network_parameters is vyos_defined %}
-    # The following {{ network_config.shared_network_parameters | length }} line(s)
-    # were added as shared-network-parameters in the CLI and have not been validated
-{%             for parameter in network_config.shared_network_parameters %}
-    {{ parameter }}
-{%             endfor %}
-{%         endif %}
-{%         if network_config.subnet is vyos_defined %}
-{%             for subnet, subnet_config in network_config.subnet.items() %}
-{%                 if subnet_config.description is vyos_defined %}
-    # {{ subnet_config.description }}
-{%                 endif %}
-    subnet {{ subnet | address_from_cidr }} netmask {{ subnet | netmask_from_cidr }} {
-{%                 if subnet_config.name_server is vyos_defined %}
-        option domain-name-servers {{ subnet_config.name_server | join(', ') }};
-{%                 endif %}
-{%                 if subnet_config.domain_name is vyos_defined %}
-        option domain-name "{{ subnet_config.domain_name }}";
-{%                 endif %}
-{%                 if subnet_config.domain_search is vyos_defined %}
-        option domain-search "{{ subnet_config.domain_search | join('", "') }}";
-{%                 endif %}
-{%                 if subnet_config.ntp_server is vyos_defined %}
-        option ntp-servers {{ subnet_config.ntp_server | join(', ') }};
-{%                 endif %}
-{%                 if subnet_config.pop_server is vyos_defined %}
-        option pop-server {{ subnet_config.pop_server | join(', ') }};
-{%                 endif %}
-{%                 if subnet_config.smtp_server is vyos_defined %}
-        option smtp-server {{ subnet_config.smtp_server | join(', ') }};
-{%                 endif %}
-{%                 if subnet_config.time_server is vyos_defined %}
-        option time-servers {{ subnet_config.time_server | join(', ') }};
-{%                 endif %}
-{%                 if subnet_config.wins_server is vyos_defined %}
-        option netbios-name-servers {{ subnet_config.wins_server | join(', ') }};
-{%                 endif %}
-{%                 if subnet_config.ipv6_only_preferred is vyos_defined %}
-        option rfc8925-ipv6-only-preferred {{ subnet_config.ipv6_only_preferred }};
-{%                 endif %}
-{%                 if subnet_config.static_route is vyos_defined %}
-{%                     set static_default_route = '' %}
-{%                     if subnet_config.default_router is vyos_defined %}
-{%                         set static_default_route = ', ' ~ '0.0.0.0/0' | isc_static_route(subnet_config.default_router) %}
-{%                     endif %}
-{%                     if subnet_config.static_route is vyos_defined %}
-{%                         set rfc3442_routes = [] %}
-{%                         for route, route_options in subnet_config.static_route.items() %}
-{%                             set rfc3442_routes = rfc3442_routes.append(route | isc_static_route(route_options.next_hop)) %}
-{%                         endfor %}
-        option rfc3442-static-route {{ rfc3442_routes | join(', ') }}{{ static_default_route }};
-        option windows-static-route {{ rfc3442_routes | join(', ') }};
-{%                     endif %}
-{%                 endif %}
-{%                 if subnet_config.ip_forwarding is vyos_defined %}
-        option ip-forwarding true;
-{%                 endif %}
-{%                 if subnet_config.default_router is vyos_defined %}
-        option routers {{ subnet_config.default_router }};
-{%                 endif %}
-{%                 if subnet_config.server_identifier is vyos_defined %}
-        option dhcp-server-identifier {{ subnet_config.server_identifier }};
-{%                 endif %}
-{%                 if subnet_config.subnet_parameters is vyos_defined %}
-        # The following {{ subnet_config.subnet_parameters | length }} line(s) were added as
-        # subnet-parameters in the CLI and have not been validated!!!
-{%                     for parameter in subnet_config.subnet_parameters %}
-        {{ parameter }}
-{%                     endfor %}
-{%                 endif %}
-{%                 if subnet_config.tftp_server_name is vyos_defined %}
-        option tftp-server-name "{{ subnet_config.tftp_server_name }}";
-{%                 endif %}
-{%                 if subnet_config.bootfile_name is vyos_defined %}
-        option bootfile-name "{{ subnet_config.bootfile_name }}";
-        filename "{{ subnet_config.bootfile_name }}";
-{%                 endif %}
-{%                 if subnet_config.bootfile_server is vyos_defined %}
-        next-server {{ subnet_config.bootfile_server }};
-{%                 endif %}
-{%                 if subnet_config.bootfile_size is vyos_defined %}
-        option boot-size {{ subnet_config.bootfile_size }};
-{%                 endif %}
-{%                 if subnet_config.time_offset is vyos_defined %}
-        option time-offset {{ subnet_config.time_offset }};
-{%                 endif %}
-{%                 if subnet_config.wpad_url is vyos_defined %}
-        option wpad-url "{{ subnet_config.wpad_url }}";
-{%                 endif %}
-{%                 if subnet_config.client_prefix_length is vyos_defined %}
-        option subnet-mask {{ ('0.0.0.0/' ~ subnet_config.client_prefix_length) | netmask_from_cidr }};
-{%                 endif %}
-{%                 if subnet_config.lease is vyos_defined %}
-        default-lease-time {{ subnet_config.lease }};
-        max-lease-time {{ subnet_config.lease }};
-{%                 endif %}
-{%                 if network_config.ping_check is not vyos_defined and subnet_config.ping_check is vyos_defined %}
-        ping-check true;
-{%                 endif %}
-{%                 if subnet_config.static_mapping is vyos_defined %}
-{%                     for host, host_config in subnet_config.static_mapping.items() if host_config.disable is not vyos_defined %}
-        host {{ host | replace('_','-') if host_decl_name is vyos_defined else network | replace('_','-') ~ '_' ~ host | replace('_','-') }} {
-{%                         if host_config.ip_address is vyos_defined %}
-            fixed-address {{ host_config.ip_address }};
-{%                         endif %}
-            hardware ethernet {{ host_config.mac_address }};
-{%                         if host_config.static_mapping_parameters is vyos_defined %}
-            # The following {{ host_config.static_mapping_parameters | length }} line(s) were added
-            # as static-mapping-parameters in the CLI and have not been validated
-{%                             for parameter in host_config.static_mapping_parameters %}
-            {{ parameter }}
-{%                             endfor %}
-{%                         endif %}
-        }
-{%                     endfor %}
-{%                 endif %}
-{%                 if subnet_config.vendor_option.ubiquiti.unifi_controller is vyos_defined %}
-        option ubnt.unifi-controller {{ subnet_config.vendor_option.ubiquiti.unifi_controller }};
-{%                 endif %}
-{%                 if subnet_config.range is vyos_defined %}
-{#           pool configuration can only be used if there follows a range option #}
-        pool {
-{%                 endif %}
-{%                 if subnet_config.enable_failover is vyos_defined %}
-            failover peer "{{ failover.name }}";
-            deny dynamic bootp clients;
-{%                 endif %}
-{%                 if subnet_config.range is vyos_defined %}
-{%                     for range, range_options in subnet_config.range.items() %}
-            range {{ range_options.start }} {{ range_options.stop }};
-{%                     endfor %}
-{%                 endif %}
-{%                 if subnet_config.range is vyos_defined %}
-{#           pool configuration can only be used if there follows a range option #}
-        }
-{%                 endif %}
-    }
-{%             endfor %}
-{%         endif %}
-    on commit {
-        set shared-networkname = "{{ network }}";
-{%         if hostfile_update is vyos_defined %}
-        set ClientIp = binary-to-ascii(10, 8, ".", leased-address);
-        set ClientMac = binary-to-ascii(16, 8, ":", substring(hardware, 1, 6));
-        set ClientName = pick-first-value(host-decl-name, option fqdn.hostname, option host-name, "empty_hostname");
-        if not (ClientName = "empty_hostname") {
-            set ClientDomain = pick-first-value(config-option domain-name, "..YYZ!");
-            execute("/usr/libexec/vyos/system/on-dhcp-event.sh", "commit", ClientName, ClientIp, ClientMac, ClientDomain);
-        } else {
-            log(concat("Hostname is not defined for client with IP: ", ClientIP, " MAC: ", ClientMac));
-        }
-{%         endif %}
-    }
-}
-
-{%     endfor %}
-{% endif %}
diff --git a/data/templates/dhcp-server/dhcpdv6.conf.j2 b/data/templates/dhcp-server/dhcpdv6.conf.j2
deleted file mode 100644
index 5c3471316..000000000
--- a/data/templates/dhcp-server/dhcpdv6.conf.j2
+++ /dev/null
@@ -1,132 +0,0 @@
-### Autogenerated by dhcpv6_server.py ###
-
-# For options please consult the following website:
-# https://www.isc.org/wp-content/uploads/2017/08/dhcp43options.html
-
-log-facility local7;
-{% if preference is vyos_defined %}
-option dhcp6.preference {{ preference }};
-{% endif %}
-
-{% if global_parameters.name_server is vyos_defined %}
-option dhcp6.name-servers {{ global_parameters.name_server | join(', ') }};
-{% endif %}
-
-# Vendor specific options - Cisco
-option space cisco code width 2 length width 2;
-option cisco.tftp-servers code 1 = array of ip6-address;
-option vsio.cisco code 9 = encapsulate cisco;
-
-# Shared network configration(s)
-{% if shared_network_name is vyos_defined %}
-{%     for network, network_config in shared_network_name.items() if network_config.disable is not vyos_defined %}
-shared-network {{ network }} {
-{%         if network_config.common_options is vyos_defined %}
-{%             if network_config.common_options.info_refresh_time is vyos_defined %}
-    option dhcp6.info-refresh-time {{ network_config.common_options.info_refresh_time }};
-{%             endif %}
-{%             if network_config.common_options.domain_search is vyos_defined %}
-    option dhcp6.domain-search "{{ network_config.common_options.domain_search | join('", "') }}";
-{%             endif %}
-{%             if network_config.common_options.name_server is vyos_defined %}
-    option dhcp6.name-servers {{ network_config.common_options.name_server | join(', ') }};
-{%             endif %}
-{%         endif %}
-{%         if network_config.subnet is vyos_defined %}
-{%             for subnet, subnet_config in network_config.subnet.items() %}
-    subnet6 {{ subnet }} {
-{%                 if subnet_config.address_range is vyos_defined %}
-{%                     if subnet_config.address_range.prefix is vyos_defined %}
-{%                         for prefix, prefix_config in subnet_config.address_range.prefix.items() %}
-        range6 {{ prefix }} {{ "temporary" if prefix_config.temporary is vyos_defined }};
-{%                         endfor %}
-{%                     endif %}
-{%                     if subnet_config.address_range.start is vyos_defined %}
-{%                         for address, address_config in subnet_config.address_range.start.items() %}
-        range6 {{ address }} {{ address_config.stop }};
-{%                         endfor %}
-{%                     endif %}
-{%                 endif %}
-{%                 if subnet_config.domain_search is vyos_defined %}
-        option dhcp6.domain-search "{{ subnet_config.domain_search | join('", "') }}";
-{%                 endif %}
-{%                 if subnet_config.lease_time is vyos_defined %}
-{%                     if subnet_config.lease_time.default is vyos_defined %}
-        default-lease-time {{ subnet_config.lease_time.default }};
-{%                     endif %}
-{%                     if subnet_config.lease_time.maximum is vyos_defined %}
-        max-lease-time {{ subnet_config.lease_time.maximum }};
-{%                     endif %}
-{%                     if subnet_config.lease_time.minimum is vyos_defined %}
-        min-lease-time {{ subnet_config.lease_time.minimum }};
-{%                     endif %}
-{%                 endif %}
-{%                 if subnet_config.name_server is vyos_defined %}
-        option dhcp6.name-servers {{ subnet_config.name_server | join(', ') }};
-{%                 endif %}
-{%                 if subnet_config.nis_domain is vyos_defined %}
-        option dhcp6.nis-domain-name "{{ subnet_config.nis_domain }}";
-{%                 endif %}
-{%                 if subnet_config.nis_server is vyos_defined %}
-        option dhcp6.nis-servers {{ subnet_config.nis_server | join(', ') }};
-{%                 endif %}
-{%                 if subnet_config.nisplus_domain is vyos_defined %}
-        option dhcp6.nisp-domain-name "{{ subnet_config.nisplus_domain }}";
-{%                 endif %}
-{%                 if subnet_config.nisplus_server is vyos_defined %}
-        option dhcp6.nisp-servers {{ subnet_config.nisplus_server | join(', ') }};
-{%                 endif %}
-{%                 if subnet_config.sip_server is vyos_defined %}
-{%                     set server_ip = [] %}
-{%                     set server_fqdn = [] %}
-{%                     for address in subnet_config.sip_server %}
-{%                         if address | is_ipv6 %}
-{%                             set server_ip = server_ip.append(address) %}
-{%                         else %}
-{%                             set server_fqdn = server_fqdn.append(address) %}
-{%                         endif %}
-{%                     endfor %}
-{%                     if server_ip is vyos_defined and server_ip | length > 0 %}
-        option dhcp6.sip-servers-addresses {{ server_ip | join(', ') }};
-{%                     endif %}
-{%                     if server_fqdn is vyos_defined and server_fqdn | length > 0 %}
-        option dhcp6.sip-servers-names "{{ server_fqdn | join('", "') }}";
-{%                     endif %}
-{%                 endif %}
-{%                 if subnet_config.sntp_server is vyos_defined %}
-        option dhcp6.sntp-servers {{ subnet_config.sntp_server | join(', ') }};
-{%                 endif %}
-{%                 if subnet_config.prefix_delegation.start is vyos_defined %}
-{%                     for prefix, prefix_config in subnet_config.prefix_delegation.start.items() %}
-        prefix6 {{ prefix }} {{ prefix_config.stop }} /{{ prefix_config.prefix_length }};
-{%                     endfor %}
-{%                 endif %}
-{%                 if subnet_config.static_mapping is vyos_defined %}
-
-        # begin configuration of static client mappings
-{%                     for host, host_config in subnet_config.static_mapping.items() if host_config.disable is not vyos_defined %}
-        host {{ network | replace('_','-') }}_{{ host | replace('_','-') }} {
-{%                         if host_config.identifier is vyos_defined %}
-            host-identifier option dhcp6.client-id {{ host_config.identifier }};
-{%                         endif %}
-{%                         if host_config.ipv6_address is vyos_defined %}
-            fixed-address6 {{ host_config.ipv6_address }};
-{%                         endif %}
-{%                         if host_config.ipv6_prefix is vyos_defined %}
-            fixed-prefix6 {{ host_config.ipv6_prefix }};
-{%                         endif %}
-        }
-{%                     endfor %}
-{%                 endif %}
-{%                 if subnet_config.vendor_option.cisco.tftp_server is vyos_defined %}
-        option cisco.tftp-servers {{ subnet_config.vendor_option.cisco.tftp_server | join(', ') }};
-{%                 endif %}
-    }
-{%             endfor %}
-{%         endif %}
-    on commit {
-        set shared-networkname = "{{ network }}";
-    }
-}
-{%     endfor %}
-{% endif %}
diff --git a/data/templates/dhcp-server/kea-ctrl-agent.conf.j2 b/data/templates/dhcp-server/kea-ctrl-agent.conf.j2
new file mode 100644
index 000000000..74c63a7a0
--- /dev/null
+++ b/data/templates/dhcp-server/kea-ctrl-agent.conf.j2
@@ -0,0 +1,14 @@
+{
+    "Control-agent": {
+{% if failover is vyos_defined %}
+        "http-host": "{{ failover.source_address }}",
+        "http-port": 647,
+        "control-sockets": {
+            "dhcp4": {
+                "socket-type": "unix",
+                "socket-name": "/run/kea/dhcp4-ctrl-socket"
+            }
+        }
+{% endif %}
+    }
+}
diff --git a/data/templates/dhcp-server/kea-dhcp4.conf.j2 b/data/templates/dhcp-server/kea-dhcp4.conf.j2
new file mode 100644
index 000000000..6ab13ab27
--- /dev/null
+++ b/data/templates/dhcp-server/kea-dhcp4.conf.j2
@@ -0,0 +1,72 @@
+{
+    "Dhcp4": {
+        "interfaces-config": {
+            "interfaces": [ "*" ],
+            "dhcp-socket-type": "raw",
+            "service-sockets-max-retries": 5,
+            "service-sockets-retry-wait-time": 5000
+        },
+        "control-socket": {
+            "socket-type": "unix",
+            "socket-name": "/run/kea/dhcp4-ctrl-socket"
+        },
+        "lease-database": {
+            "type": "memfile",
+            "persist": true,
+            "name": "{{ lease_file }}"
+        },
+        "option-def": [
+            {
+                "name": "rfc3442-static-route",
+                "code": 121,
+                "type": "record",
+                "array": true,
+                "record-types": "uint8,uint8,uint8,uint8,uint8,uint8,uint8,uint8"
+            },
+            {
+                "name": "windows-static-route",
+                "code": 249,
+                "type": "record",
+                "array": true,
+                "record-types": "uint8,uint8,uint8,uint8,uint8,uint8,uint8,uint8"
+            },
+            {
+                "name": "wpad-url",
+                "code": 252,
+                "type": "string"
+            },
+            {
+                "name": "unifi-controller",
+                "code": 1,
+                "type": "ipv4-address",
+                "space": "ubnt"
+            }
+        ],
+        "hooks-libraries": [
+{% if failover is vyos_defined %}
+            {
+                "library": "/usr/lib/{{ machine }}-linux-gnu/kea/hooks/libdhcp_ha.so",
+                "parameters": {
+                    "high-availability": [{{ failover | kea_failover_json }}]
+                }
+            },
+{% endif %}
+{% if hostfile_update is vyos_defined %}
+            {
+                "library": "/usr/lib/{{ machine }}-linux-gnu/kea/hooks/libdhcp_run_script.so",
+                "parameters": {
+                    "name": "/usr/libexec/vyos/system/on-dhcp-event.sh",
+                    "sync": false
+                }
+            },
+{% endif %}
+            {
+                "library": "/usr/lib/{{ machine }}-linux-gnu/kea/hooks/libdhcp_lease_cmds.so",
+                "parameters": {}
+            }
+        ],
+{% if shared_network_name is vyos_defined %}
+        "shared-networks": {{ shared_network_name | kea_shared_network_json }}
+{% endif %}
+    }
+}
diff --git a/data/templates/dhcp-server/kea-dhcp6.conf.j2 b/data/templates/dhcp-server/kea-dhcp6.conf.j2
new file mode 100644
index 000000000..3ce4e6370
--- /dev/null
+++ b/data/templates/dhcp-server/kea-dhcp6.conf.j2
@@ -0,0 +1,48 @@
+{
+    "Dhcp6": {
+        "interfaces-config": {
+            "interfaces": [ "*" ],
+            "service-sockets-max-retries": 5,
+            "service-sockets-retry-wait-time": 5000
+        },
+        "control-socket": {
+            "socket-type": "unix",
+            "socket-name": "/run/kea/dhcp6-ctrl-socket"
+        },
+        "lease-database": {
+            "type": "memfile",
+            "persist": true,
+            "name": "{{ lease_file }}"
+        },
+        "hooks-libraries": [
+            {
+                "library": "/usr/lib/{{ machine }}-linux-gnu/kea/hooks/libdhcp_lease_cmds.so",
+                "parameters": {}
+            }
+        ],
+        "option-data": [
+{% if global_parameters.name_server is vyos_defined %}
+            {
+                "name": "dns-servers",
+                "code": 23,
+                "space": "dhcp6",
+                "csv-format": true,
+                "data": "{{ global_parameters.name_server | join(", ") }}"
+            }{{ ',' if preference is vyos_defined else '' }}
+{% endif %}
+{% if preference is vyos_defined %}
+            {
+                "name": "preference",
+                "code": 7,
+                "space": "dhcp6",
+                "csv-format": true,
+                "data": "{{ preference }}"
+            }
+{% endif %}
+        ],
+{% if shared_network_name is vyos_defined %}
+        "shared-networks": {{ shared_network_name | kea6_shared_network_json }}
+{% endif %}
+
+    }
+}