{

"Dhcp4": {
    // Add names of your network interfaces to listen on.
    "interfaces-config": {
        "interfaces": [ "eth0" ]
    },

    "control-socket": {
        "socket-type": "unix",
        "socket-name": "/run/kea/kea4-ctrl-socket"
    },

    "lease-database": {
        // Memfile is the simplest and easiest backend to use. It's an in-memory
        // C++ database that stores its state in CSV file.
        "type": "memfile",
        "persist": true,
        "lfc-interval": 3600
    },

    // Kea allows storing host reservations in a database. If your network is
    // small or you have few reservations, it's probably easier to keep them
    // in the configuration file. If your network is large, it's usually better
    // to use database for it. To enable it, uncomment the following:
    // "hosts-database": {
    //     "type": "mysql",
    //     "name": "kea",
    //     "user": "kea",
    //     "password": "kea",
    //     "host": "localhost",
    //     "port": 3306
    // },
    // See Section 7.2.3 "Hosts storage" for details.

    // Setup reclamation of the expired leases and leases affinity.
    // Expired leases will be reclaimed every 10 seconds. Every 25
    // seconds reclaimed leases, which have expired more than 3600
    // seconds ago, will be removed. The limits for leases reclamation
    // are 100 leases or 250 ms for a single cycle. A warning message
    // will be logged if there are still expired leases in the
    // database after 5 consecutive reclamation cycles.
    "expired-leases-processing": {
        "reclaim-timer-wait-time": 10,
        "flush-reclaimed-timer-wait-time": 25,
        "hold-reclaimed-time": 3600,
        "max-reclaim-leases": 100,
        "max-reclaim-time": 250,
        "unwarned-reclaim-cycles": 5
    },

    // Global timers specified here apply to all subnets, unless there are
    // subnet specific values defined in particular subnets.
    "renew-timer": 900,
    "rebind-timer": 1800,
    "valid-lifetime": 3600,

    //"option-data": [
    //    {
    //        "name": "domain-name",
    //        "data": "example.local"
    //    },
    //    {
    //        "name": "domain-search",
    //        "data": "*.example.local, example.local"
    //    }
    //],

    "subnet4": [
        {
            // This defines the whole subnet. Kea will use this information to
            // determine where the clients are connected. This is the whole
            // subnet in your network. This is mandatory parameter for each
            // subnet.
            "subnet": "10.1.2.0/24",
            "id": 1,

            // Pools define the actual part of your subnet that is governed
            // by Kea. Technically this is optional parameter, but it's
            // almost always needed for DHCP to do its job. If you omit it,
            // clients won't be able to get addresses, unless there are
            // host reservations defined for them.
            "pools": [ { "pool": "10.1.2.5 - 10.1.2.200" } ],

            // 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.
            //"option-data": [
                //{
                    // For each IPv4 subnet you most likely need to specify at
                    // least one router.
                    //"name": "routers",
                    //"data": "10.0.0.1"
                //}
            //],

            "reservations": [
                {
                    "hw-address": "00:00:00:00:00:01",
                    "ip-address": "10.1.2.1",
                    "hostname": "node00"
                },
                {
                    "hw-address": "00:00:00:00:00:02",
                    "ip-address": "10.1.2.2",
                    "hostname": "node01"
                },
                {
                    "hw-address": "00:00:00:00:00:03",
                    "ip-address": "10.1.2.3",
                    "hostname": "node02"
                },
                {
                    "hw-address": "00:00:00:00:00:04",
                    "ip-address": "10.1.2.4",
                    "hostname": "node03"
                }
            ]
            // You can add more subnets here.
        }
    ],

    // Logging configuration starts here. Kea uses different loggers to log various
    // activities. For details (e.g. names of loggers), see Chapter 18.
    "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 more) to a file.
        "name": "kea-dhcp4",
        "output_options": [
            {
                // Specifies the output file. There are several special values
                // supported:
                // - stdout (prints on standard output)
                // - stderr (prints on standard error)
                // - syslog (logs to syslog)
                // - syslog:name (logs to syslog using specified name)
                // Any other value is considered a name of the file
                "output": "stdout",

                // Shorter log pattern suitable for use with systemd,
                // avoids redundant information
                "pattern": "%-5p %m\n",

                // This governs whether the log output is flushed to disk after
                // every write.
                // "flush": false,

                // This specifies the maximum size of the file before it is
                // rotated.
                // "maxsize": 1048576,

                // This specifies the maximum number of rotated files to keep.
                // "maxver": 8
            }
        ],
        // This specifies the severity of log messages to keep. Supported values
        // are: FATAL, ERROR, WARN, INFO, DEBUG
        "severity": "INFO",

        // If DEBUG level is specified, this value is used. 0 is least verbose,
        // 99 is most verbose. Be cautious, Kea can generate lots and lots
        // of logs if told to do so.
        "debuglevel": 0
    }
  ]
}
}