[Kea-users] unable to forward command to the dhcp4 service: Connection refused. The server is likely to be offline
Kraishak Mahtha
kraishak.edu at gmail.com
Mon Mar 6 09:37:42 UTC 2023
Hi All,
I am trying to configure the kea-HA setup in my local environment but I am
facing an issue the heartbeat is getting failed and the logs are as follows:
Logs on Failover
=============
2023-03-06 09:04:43.761 DEBUG [kea-dhcp4.http/28550.140575742654656]
HTTP_CLIENT_REQUEST_SEND sending HTTP request POST / HTTP/1.1 to
http://192.168.0.168:8000/
2023-03-06 09:04:43.761 DEBUG [kea-dhcp4.http/28550.140575742654656]
HTTP_CLIENT_REQUEST_SEND_DETAILS detailed information about request sent to
http://192.168.0.168:8000/:
POST / HTTP/1.1
Host: 192.168.0.168
Content-Length: 53
Content-Type: application/json
{ "command": "ha-heartbeat", "service": [ "dhcp4" ] }
2023-03-06 09:04:43.762 DEBUG [kea-dhcp4.http/28550.140575742654656]
HTTP_SERVER_RESPONSE_RECEIVED received HTTP response from
http://192.168.0.168:8000/
2023-03-06 09:04:43.762 DEBUG [kea-dhcp4.http/28550.140575742654656]
HTTP_SERVER_RESPONSE_RECEIVED_DETAILS detailed information about
well-formed response received from http://192.168.0.168:8000/:
HTTP/1.1 200 OK
Content-Length: 133
Content-Type: application/json
Date: Mon, 06 Mar 2023 09:04:43 GMT
[ { "result": 1, "text": "unable to forward command to the dhcp4 service:
Connection refused. The server is likely to be offline" } ]
2023-03-06 09:04:43.762 WARN [kea-dhcp4.ha-hooks/28550.140575742654656]
HA_HEARTBEAT_FAILED heartbeat to kea-dhcp-168 (http://192.168.0.168:8000/)
failed: unable to forward command to the dhcp4 service: Connection refused.
The server is likely to be offline, error code 1
2023-03-06 09:04:43.762 WARN [kea-dhcp4.ha-hooks/28550.140575742654656]
HA_COMMUNICATION_INTERRUPTED communication with kea-dhcp-168 is interrupted
Logs on Primary
==============
2023-03-06 09:01:50.143 DEBUG [kea-dhcp4.dhcpsrv/13620.140081380149440]
DHCPSRV_TIMERMGR_START_TIMER starting timer: reclaim-expired-leases
2023-03-06 09:01:52.145 DEBUG [kea-dhcp4.http/13620.140081380149440]
HTTP_CLIENT_REQUEST_SEND sending HTTP request POST / HTTP/1.1 to
http://192.168.0.169:8000/
2023-03-06 09:01:52.145 DEBUG [kea-dhcp4.http/13620.140081380149440]
HTTP_CLIENT_REQUEST_SEND_DETAILS detailed information about request sent to
http://192.168.0.169:8000/:
POST / HTTP/1.1
Host: 192.168.0.169
Content-Length: 53
Content-Type: application/json
{ "command": "ha-heartbeat", "service": [ "dhcp4" ] }
2023-03-06 09:01:52.146 DEBUG [kea-dhcp4.http/13620.140081380149440]
HTTP_SERVER_RESPONSE_RECEIVED received HTTP response from
http://192.168.0.169:8000/
2023-03-06 09:01:52.146 DEBUG [kea-dhcp4.http/13620.140081380149440]
HTTP_SERVER_RESPONSE_RECEIVED_DETAILS detailed information about
well-formed response received from http://192.168.0.169:8000/:
HTTP/1.1 200 OK
Content-Length: 133
Content-Type: application/json
Date: Mon, 06 Mar 2023 09:01:52 GMT
[ { "result": 1, "text": "unable to forward command to the dhcp4 service:
Connection refused. The server is likely to be offline" } ]
2023-03-06 09:01:52.146 WARN [kea-dhcp4.ha-hooks/13620.140081380149440]
HA_HEARTBEAT_FAILED heartbeat to appliance-169 (http://192.168.0.169:8000/)
failed: unable to forward command to the dhcp4 service: Connection refused.
The server is likely to be offline, error code 1
2023-03-06 09:01:53.558 INFO
[kea-ctrl-agent.commands/13581.140159667833024] COMMAND_RECEIVED Received
command 'ha-heartbeat'
2023-03-06 09:01:53.558 INFO
[kea-ctrl-agent.ctrl-agent/13581.140159667833024]
CTRL_AGENT_COMMAND_RECEIVED command ha-heartbeat received from remote
address 192.168.0.169
=========
Primary config
==============
##DHCPv4 192.168.0.168
{
"Dhcp4": {
"valid-lifetime": 300,
"renew-timer": 150,
"rebind-timer": 200,
"server-tag": "192.168.0.168",
"control-socket": {
"socket-name": "/tmp/kea4-ctrl-socket1",
"socket-type": "unix"
},
"lease-database": {
"type": "memfile",
"persist": true,
"name": "/var/lib/kea/dhcp4.leases"
},
"interfaces-config": {
"interfaces": ["eth0"]
},
"hooks-libraries": [
{
"library": "/usr/local/lib/kea/hooks/libdhcp_lease_cmds.so",
"parameters": { }
},
{
"library": "/usr/local/lib/kea/hooks/libdhcp_bootp.so",
"parameters": { }
},
{
"library":
"/usr/local/lib/kea/hooks/libdhcp_ha.so",
"parameters": {
"high-availability": [{
"this-server-name":
"kea-dhcp-168",
"mode": "hot-standby",
"heartbeat-delay": 10000,
"max-response-delay": 60000,
"max-ack-delay": 5000,
"max-unacked-clients": 5,
"peers": [{
"name":
"kea-dhcp-168",
"url": "
http://192.168.0.168:8000/",
"role": "primary",
"auto-failover":
true
}, {
"name":
"appliance-169",
"url": "
http://192.168.0.169:8000/",
"role": "standby",
"auto-failover":
true
}]
}]
}
}],
"subnet4": [{
"subnet": "4.0.0.0/24",
"option-data": [
{
"data": "2.2.2.2, 8.8.4.4",
"name": "domain-name-servers"
},
{
"data": "4.0.0.1",
"name": "routers"
}
],
"pools": [
{
"pool": "4.0.0.25 - 4.0.0.250"
}
]
}],
"loggers": [
{
"name": "kea-dhcp4",
"debuglevel": 99,
"output_options": [
{
"output": "/usr/local/var/log/kea-dhcp4.log"
}
],
"severity": "DEBUG"
}
]
}
}
kea-ctrl-agent.conf on Primary
=========================
{
"Control-agent": {
"http-host": "192.168.0.168",
"http-port": 8000,
"control-sockets": {
"dhcp4": {
"socket-type": "unix",
"socket-name": "/tmp/control_socket"
}
},
"cert-required": false
}
}
Netstat output
=============
[root at kea-dhcp-168 ~]# netstat -tulpna | grep 8000
tcp 0 0 192.168.0.168:8000 0.0.0.0:* LISTEN
13581/kea-ctrl-agen
tcp 0 0 192.168.0.168:57308 192.168.0.169:8000
ESTABLISHED 13620/kea-dhcp4
tcp 0 0 192.168.0.168:8000 192.168.0.169:58432
ESTABLISHED 13581/kea-ctrl-agen
[root at kea-dhcp-168 ~]#
[root at kea-dhcp-168 ~]# netstat -tulpna | grep 67
udp 0 0 192.168.0.168:67 0.0.0.0:*
13620/kea-dhcp4
[root at kea-dhcp-168 ~]#
Failover DHCPv4 config
===================
#DHCPv4 192.168.0.169
{
"Dhcp4": {
"valid-lifetime": 300,
"renew-timer": 150,
"rebind-timer": 200,
"server-tag": "192.168.0.169",
"control-socket": {
"socket-name": "/opt/testUAT/keaFolder/kea4-ctrl-socket",
"socket-type": "unix"
},
"lease-database": {
"type": "memfile",
"persist": true,
"name": "/opt/testUAT/var/lib/kea/dhcp4.leases"
},
"interfaces-config": {
"interfaces": ["eth0"]
},
"hooks-libraries": [
{
"library":
"/opt/testUAT/lib/kea/hooks/libdhcp_lease_cmds.so",
"parameters": { }
},
{
"library": "/opt/testUAT/lib/kea/hooks/libdhcp_bootp.so",
"parameters": { }
},
{
"library":
"/opt/testUAT/lib/kea/hooks/libdhcp_ha.so",
"parameters": {
"high-availability": [{
"this-server-name":
"appliance-169",
"mode": "hot-standby",
"heartbeat-delay": 10000,
"max-response-delay": 60000,
"max-ack-delay": 5000,
"max-unacked-clients": 5,
"peers": [{
"name":
"kea-dhcp-168",
"url": "
http://192.168.0.168:8000/",
"role": "primary",
"auto-failover":
true
}, {
"name":
"appliance-169",
"url": "
http://192.168.0.169:8000/",
"role": "standby",
"auto-failover":
true
}]
}]
}
}],
"subnet4": [{
"subnet": "4.0.0.0/24",
"option-data": [
{
"data": "2.2.2.2, 8.8.4.4",
"name": "domain-name-servers"
},
{
"data": "4.0.0.1",
"name": "routers"
}
],
"pools": [
{
"pool": "4.0.0.25 - 4.0.0.250"
}
]
}],
"loggers": [
{
"name": "kea-dhcp4",
"debuglevel": 99,
"output_options": [
{
"output": "/opt/testUAT/var/log/kea-dhcp4.log"
}
],
"severity": "DEBUG"
}
]
}
}
kea-ctrl-agent.conf on Failover
=======================
{
"Control-agent": {
"http-host": "192.168.0.169",
"http-port": 8000,
"control-sockets": {
"dhcp4": {
"socket-type": "unix",
"socket-name": "/tmp/control_socket"
}
},
"cert-required": false
}
}
Netstat output
=============
[root at appliance-169 ~]# netstat -tulpna | grep 8000
tcp 0 0 192.168.0.169:8000 0.0.0.0:* LISTEN
28520/kea-ctrl-agen
tcp 0 0 192.168.0.169:8000 192.168.0.168:57308
ESTABLISHED 28520/kea-ctrl-agen
tcp 0 0 192.168.0.169:58432 192.168.0.168:8000
ESTABLISHED 28550/kea-dhcp4
[root at appliance-169 ~]#
[root at kea-dhcp-168 ~]# netstat -tulpna | grep 67
udp 0 0 192.168.0.169:67 0.0.0.0:*
28550/kea-dhcp4
[root at kea-dhcp-168 ~]#
I am not sure why it is unable to forward commands to dhcp4 service, Can
someone guide or help me if you face the same issue or are aware of the
issue?
Thanks in advance
Kraishak
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