diff --git a/roles/kea/templates/kea-dhcp4.conf.j2 b/roles/kea/templates/kea-dhcp4.conf.j2 index ec826ca..dd94908 100644 --- a/roles/kea/templates/kea-dhcp4.conf.j2 +++ b/roles/kea/templates/kea-dhcp4.conf.j2 @@ -1,145 +1,51 @@ -// This is an example configuration of the Kea DHCPv4 server 1: -// -// - uses High Availability hook library and Lease Commands hook library -// to enable High Availability function for the DHCP server. This config -// file is for the primary (the active) server. -// - uses memfile, which stores lease data in a local CSV file -// - it assumes a single /24 addressing over a link that is directly reachable -// (no DHCP relays) -// - there is a handful of IP reservations -// -// It is expected to run with a standby (the passive) server, which has a very similar -// configuration. The only difference is that "this-server-name" must be set to "server2" on the -// other server. Also, the interface configuration depends on the network settings of the -// particular machine. - { - "Dhcp4": { - - // Add names of your network interfaces to listen on. "interfaces-config": { - // The DHCPv4 server listens on this interface. When changing this to - // the actual name of your interface, make sure to also update the - // interface parameter in the subnet definition below. "interfaces": ["{{ kea_dhcp_int }}"] }, - - // Control socket is required for communication between the Control - // Agent and the DHCP server. High Availability requires Control Agent - // to be running because lease updates are sent over the RESTful - // API between the HA peers. "control-socket": { "socket-type": "unix", "socket-name": "/tmp/kea4-ctrl-socket" }, - - // Use Memfile lease database backend to store leases in a CSV file. - // Depending on how Kea was compiled, it may also support SQL databases - // (MySQL and/or PostgreSQL). Those database backends require more - // parameters, like name, host and possibly user and password. - // There are dedicated examples for each backend. See Section 7.2.2 "Lease - // Storage" for details. "lease-database": { - // Memfile is the simplest and easiest backend to use. It's an in-memory - // database with data being written to a CSV file. It is very similar to - // what ISC DHCP does. "type": "memfile" }, - - // Let's configure some global parameters. The home network is not very dynamic - // and there's no shortage of addresses, so no need to recycle aggressively. - "valid-lifetime": 43200, // leases will be valid for 12h - "renew-timer": 21600, // clients should renew every 6h - "rebind-timer": 32400, // clients should start looking for other servers after 9h - - // Kea will clean up its database of expired leases once per hour. However, it - // will keep the leases in expired state for 2 days. This greatly increases the - // chances for returning devices to get the same address again. To guarantee that, - // use host reservation. - // If both "flush-reclaimed-timer-wait-time" and "hold-reclaimed-time" are - // not 0, when the client sends a release message the lease is expired - // instead of being deleted from lease storage. + "valid-lifetime": 43200, + "renew-timer": 21600, + "rebind-timer": 32400, "expired-leases-processing": { "reclaim-timer-wait-time": 3600, "hold-reclaimed-time": 172800, "max-reclaim-leases": 0, "max-reclaim-time": 0 }, - - // HA requires two hook libraries to be loaded: libdhcp_lease_cmds.so and - // libdhcp_ha.so. The former handles incoming lease updates from the HA peers. - // The latter implements high availability feature for Kea. Note the library name - // should be the same, but the path is OS specific. "hooks-libraries": [ - // The lease_cmds library must be loaded because HA makes use of it to - // deliver lease updates to the server as well as synchronize the - // lease database after failure. { "library": "/usr/lib/x86_64-linux-gnu/kea/hooks/libdhcp_lease_cmds.so" }, - { "library": "/usr/lib/x86_64-linux-gnu/kea/hooks/libdhcp_stat_cmds.so" }, - { - // The HA hook library should be loaded. "library": "/usr/lib/x86_64-linux-gnu/kea/hooks/libdhcp_ha.so", "parameters": { - // Each server should have the same HA configuration, except for the - // "this-server-name" parameter. "high-availability": [ { - // This parameter points to this server instance. The respective - // HA peers must have this parameter set to their own names. "this-server-name": "{{ kea_this_server }}", - // The HA mode is set to hot-standby. In this mode, the active server handles - // all the traffic. The standby takes over if the primary becomes unavailable. "mode": "hot-standby", - // Heartbeat is to be sent every 10 seconds if no other control - // commands are transmitted. "heartbeat-delay": 10000, - // Maximum time for partner's response to a heartbeat, after which - // failure detection is started. This is specified in milliseconds. - // If we don't hear from the partner in 60 seconds, it's time to - // start worrying. "max-response-delay": 30000, - // The following parameters control how the server detects the - // partner's failure. The ACK delay sets the threshold for the - // 'secs' field of the received discovers. This is specified in - // milliseconds. "max-ack-delay": 5000, - // This specifies the number of clients which send messages to - // the partner but appear to not receive any response. "max-unacked-clients": 0, - // This specifies the maximum timeout (in milliseconds) for the server - // to complete sync. If you have a large deployment (high tens or - // hundreds of thousands of clients), you may need to increase it - // further. The default value is 60000ms (60 seconds). "sync-timeout": 60000, "peers": [ - // This is the configuration of this server instance. { "name": "{{ kea_srv1 }}", - // This specifies the URL of this server instance. The - // Control Agent must run along with this DHCPv4 server - // instance and the "http-host" and "http-port" must be - // set to the corresponding values. "url": "http://{{ kea_ctrl_address1 }}:8000/", - // This server is primary. The other one must be - // secondary. "role": "primary" }, - // This is the configuration of the secondary server. { "name": "{{ kea_srv2 }}", - // Specifies the URL on which the partner's control - // channel can be reached. The Control Agent is required - // to run on the partner's machine with "http-host" and - // "http-port" values set to the corresponding values. "url": "http://{{ kea_ctrl_address2 }}:8000/", - // The other server is secondary. This one must be - // primary. "role": "standby" } ] @@ -147,42 +53,22 @@ } } ], - - // This example contains a single subnet declaration. "subnet4": [ { - // Subnet prefix. "subnet": "172.16.64.0/24", "id": 1, - - // There are no relays in this network, so we need to tell Kea that this subnet - // is reachable directly via the specified interface. "interface": "enp0s9", - - // Specify a dynamic address pool. "pools": [ { "pool": "172.16.64.100-172.16.64.150" } ], - - // These are options that are subnet specific. In most cases, you need to define at - // least routers option, as without this option your clients will not be able to reach - // their default gateway and will not have Internet connectivity. If you have many - // subnets and they share the same options (e.g. DNS servers typically is the same - // everywhere), you may define options at the global scope, so you don't repeat them - // for every network. "option-data": [ { - // For each IPv4 subnet you typically need to specify at least one router. "name": "routers", "data": "172.16.64.254" }, { - // Using cloudflare or Quad9 is a reasonable option. Change this - // to your own DNS servers is you have them. Another popular - // choice is 8.8.8.8, owned by Google. Using third party DNS - // service raises some privacy concerns. "name": "domain-name-servers", "data": "172.16.0.1, 172.16.0.4" }, @@ -196,17 +82,7 @@ "name": "domain-search", "data": "gsb.lan" }, - ], - - // Some devices should get a static address. Since the .100 - .199 range is dynamic, - // let's use the lower address space for this. There are many ways how reservation - // can be defined, but using MAC address (hw-address) is by far the most popular one. - // You can use client-id, duid and even custom defined flex-id that may use whatever - // parts of the packet you want to use as identifiers. Also, there are many more things - // you can specify in addition to just an IP address: extra options, next-server, hostname, - // assign device to client classes etc. See the Kea ARM, Section 8.3 for details. - // The reservations are subnet specific. #"reservations": [ # { # "hw-address": "1a:1b:1c:1d:1e:1f", @@ -219,13 +95,8 @@ #] } ], - // fichier de logs "loggers": [ { - // This section affects kea-dhcp4, which is the base logger for DHCPv4 component. It tells - // DHCPv4 server to write all log messages (on severity INFO or higher) to a file. The file - // will be rotated once it grows to 2MB and up to 4 files will be kept. The debuglevel - // (range 0 to 99) is used only when logging on DEBUG level. "name": "kea-dhcp4", "output_options": [ {