Hi All,
I have recently started exploring kea-dhcp4, while I am checking for the
kea-dhcp failover on chatGPT, It says that failover and HA are two
different mechanisms for the kea and here is the sample example for
kea-failover config as it provides
# Sample config for failover
================
{
"Dhcp4": {
"control-socket": {
"socket-type": "unix",
"socket-name": "/tmp/kea-dhcp4-ctrl.sock"
},
"lease-database": {
"type": "memfile",
"lfc-interval": 3600
},
"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": 10,
"warned-reclaim-cycles": 20
},
"subnet4": [
{
"id": 1,
"subnet": "192.0.2.0/24",
"pools": [
{
"pool": "192.0.2.100 - 192.0.2.200"
}
],
"option-data": [
{
"name": "routers",
"data": "192.0.2.1"
}
]
}
],
"hosts-database": {
"type": "memfile",
"persist": true,
"name": "hosts.json"
},
"dhcp-ddns": {
"enable-updates": true,
"qualifying-suffix": "example.com",
"reverse-ddns": true,
"hostname-char-set": "[a-zA-Z0-9.-]"
},
"valid-lifetime": 300,
"renew-timer": 150,
"rebind-timer": 225,
"interfaces-config": {
"interfaces": ["eth0"]
},
"dhcp-disable": false,
"option-def": [
{
"name": "domain-name-servers",
"code": 6,
"type": "ipv4-address",
"array": true
}
],
"option-data": [
{
"name": "domain-name-servers",
"data": "192.0.2.2, 192.0.2.3"
}
],
"failover": {
"name": "dhcp-failover",
"mode": "hot-standby",
"peer-address": "192.0.2.101",
"peer-port": 519,
"max-response-delay": 60,
"max-unacked-clients": 10000,
"load-balance-max-percent": 50,
"load-balance-max-secs": 3600,
"auto-partner-down": true,
"decline-time": 60,
"down-time": 300,
"startup-delay": 10,
"trust-local-time": true,
"heartbeat-interval": 10,
"connect-timeout": 2
}
}
}
#sample example of HA
===================
{
"Dhcp4": {
"valid-lifetime": 3600,
"renew-timer": 600,
"rebind-timer": 1200,
"subnet4": [
{
"subnet": "192.168.0.0/24",
"pools": [
{
"pool": "192.168.0.100 - 192.168.0.200"
}
],
"option-data": [
{
"name": "domain-name-servers",
"data": "8.8.8.8, 8.8.4.4"
},
{
"name": "domain-name",
"data": "example.com"
}
],
"reservations": [
{
"hw-address": "00:11:22:33:44:55",
"ip-address": "192.168.0.10",
"hostname": "host1.example.com"
}
]
}
],
"interfaces-config": {
"interfaces": ["eth0", "eth1"]
},
"ha": {
"mode": "hot-standby",
"ip-address": "192.168.0.2",
"shared-secret": "my-secret",
"peer-address": "192.168.0.3"
}
}
}
But when I search for the same in the official kea-doc. I don't see any
such reference to failover directive or a key-word. Not sure if it is not
supported from 2.2.0 version and later or I missed any other docs. Just
curious to know if we really have such a difference, and if any one is
familiar with this can you please share the reference for it.
Thanks in Advance
Kraishak
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