[Kea-users] [EXTERNAL] Re: kea-2.4.1 // Strange HA related errors
Xiao, Yu (CCI-Atlanta)
yu.xiao at cox.com
Fri Mar 29 14:47:31 UTC 2024
Thank you for the advice, Darren. Let me test on them.
Best Regards,
Yu
From: Kea-users <kea-users-bounces at lists.isc.org> on behalf of Darren Ankney <darren.ankney at gmail.com>
Date: Friday, March 29, 2024 at 6:58 AM
To: Kea user's list <kea-users at lists.isc.org>
Subject: Re: [Kea-users] [EXTERNAL] Re: kea-2.4.1 // Strange HA related errors
Hi Yu,
You will need to enable multi-threading dedicated listener for HA as
described here:
https://urldefense.com/v3/__https://kea.readthedocs.io/en/kea-2.4.1/arm/hooks.html*multi-threaded-configuration-ha-mt__;Iw!!Hit2Ag!zoh5xPnvNfIYnDVa8fKOaBy5jIIQIMWT5qUv1AwVKSJJWw6Sv4JGdCWpcT1787WpOLtTS--cCCJ1garUIhR_$<https://urldefense.com/v3/__https:/kea.readthedocs.io/en/kea-2.4.1/arm/hooks.html*multi-threaded-configuration-ha-mt__;Iw!!Hit2Ag!zoh5xPnvNfIYnDVa8fKOaBy5jIIQIMWT5qUv1AwVKSJJWw6Sv4JGdCWpcT1787WpOLtTS--cCCJ1garUIhR_$>
or alter your "url" in each in the peers blocks to port 8001 so that
they communicate via the kea-ctrl-agent. I think that should fix it.
Thank you,
Darren Ankney
On Tue, Mar 26, 2024 at 7:58 AM Xiao, Yu (CCI-Atlanta) via Kea-users
<kea-users at lists.isc.org> wrote:
>
> Hi Darren,
>
>
>
> I am using 2.4.1.
>
>
>
>
>
> Best Regards,
>
> Yu
>
>
>
>
>
> From: Kea-users <kea-users-bounces at lists.isc.org> on behalf of Darren Ankney <darren.ankney at gmail.com>
> Date: Tuesday, March 26, 2024 at 6:03 AM
> To: Kea user's list <kea-users at lists.isc.org>
> Subject: [EXTERNAL] Re: [Kea-users] kea-2.4.1 // Strange HA related errors
>
> Hello Yu,
>
> What version of Kea are you running on these servers, out of curiosity?
>
> Thank you,
> Darren Ankney
>
> On Mon, Mar 25, 2024 at 10:55 AM Xiao, Yu (CCI-Atlanta) via Kea-users
> <kea-users at lists.isc.org> wrote:
> >
> > Hi experts,
> >
> >
> >
> > I have configured two VMs in the same hypervisor as hot-standby mode HA. I believe they are successfully communicating with each other with heart beat packets, as we can see the primary VM kea-1 has successfully received the “ha-heartbeat” from the standby VM kea-2 in green logs. But the red logs indicate that the ha_hooks think the HA heartbeat communications failed due to “no route”. But this is a LAN network, and there’s indeed route installed as we can see below and we can ping the 69 ip.
> >
> >
> >
> > [yxiao322 at kea_home1 ~]$ ip route
> >
> > 192.168.100.0/24 dev ens18 proto kernel scope link src 192.168.100.197 metric 100 <<< This should be the route to 192.168.100.69
> >
> > 192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 linkdown
> >
> >
> >
> > [root at kea_home1 yxiao322]# ping 192.168.100.69
> >
> > PING 192.168.100.69 (192.168.100.69) 56(84) bytes of data.
> >
> > 64 bytes from 192.168.100.69: icmp_seq=1 ttl=64 time=0.342 ms
> >
> > 64 bytes from 192.168.100.69: icmp_seq=2 ttl=64 time=0.302 ms
> >
> > 64 bytes from 192.168.100.69: icmp_seq=3 ttl=64 time=0.236 ms
> >
> > ^Z
> >
> > [1]+ Stopped ping 192.168.100.69
> >
> >
> >
> > And if I stop the kea service on primary, then we can see standby server will complain “communication with kea_home1 is interrupted”. And as soon as I start kea service again on primary, then the database began sync again. Thus, I believe there’s indeed communications and syncs between primary and standby VMs. But for some reason, if I shut the kea service on primary, then the standby won’t distribute DHCP leases even after I waited for a long time. Did I miss something here?
> >
> >
> >
> >
> >
> > Primary logs:
> >
> >
> >
> > Mar 25 10:35:37 kea_home1 kea-dhcp6[1224]: 2024-03-25 10:35:37.198 INFO [kea-dhcp6.commands/1224.139988007651072] COMMAND_RECEIVED Received command 'ha-heartbeat'
> >
> > Mar 25 10:35:37 kea_home1 kea-dhcp6[1224]: 2024-03-25 10:35:37.627 WARN [kea-dhcp6.ha-hooks/1224.139988049614592] HA_HEARTBEAT_COMMUNICATIONS_FAILED failed to send heartbeat to kea_home2 (https://urldefense.com/v3/__http://192.168.100.69:8000/__;!!Hit2Ag!xbrgKugiAG9Ig2_84VjCtBW6x-DpB9Aox3x1n_oCHrMu1W-ZDDMlKiorN7OVohqT2UUHSGoJ3ePqTi1Q4B1j$ ): No route to host
> >
> > Mar 25 10:35:37 kea_home1 kea-dhcp6[1224]: 2024-03-25 10:35:37.627 WARN [kea-dhcp6.ha-hooks/1224.139988049614592] HA_COMMUNICATION_INTERRUPTED communication with kea_home2 is interrupted
> >
> > Mar 25 10:35:38 kea_home1 kea-dhcp6[1224]: 2024-03-25 10:35:38.199 INFO [kea-dhcp6.commands/1224.139988016043776] COMMAND_RECEIVED Received command 'ha-heartbeat'
> >
> > Mar 25 10:35:38 kea_home1 kea-dhcp6[1224]: 2024-03-25 10:35:38.627 WARN [kea-dhcp6.ha-hooks/1224.139988032829184] HA_HEARTBEAT_COMMUNICATIONS_FAILED failed to send heartbeat to kea_home2 (https://urldefense.com/v3/__http://192.168.100.69:8000/__;!!Hit2Ag!xbrgKugiAG9Ig2_84VjCtBW6x-DpB9Aox3x1n_oCHrMu1W-ZDDMlKiorN7OVohqT2UUHSGoJ3ePqTi1Q4B1j$ ): No route to host
> >
> > Mar 25 10:35:38 kea_home1 kea-dhcp6[1224]: 2024-03-25 10:35:38.627 WARN [kea-dhcp6.ha-hooks/1224.139988032829184] HA_COMMUNICATION_INTERRUPTED communication with kea_home2 is interrupted
> >
> >
> >
> > Standby logs:
> >
> >
> >
> > Mar 25 10:10:24 kea_home2 kea-dhcp6[2836]: 2024-03-25 10:10:24.129 WARN [kea-dhcp6.ha-hooks/2836.139717198915328] HA_COMMUNICATION_INTERRUPTED communication with kea_home1 is interrupted
> >
> > Mar 25 10:10:25 kea_home2 kea-dhcp6[2836]: 2024-03-25 10:10:25.130 WARN [kea-dhcp6.ha-hooks/2836.139717207308032] HA_HEARTBEAT_COMMUNICATIONS_FAILED failed to send heartbeat to kea_home1 (https://urldefense.com/v3/__http://192.168.100.197:8000/__;!!Hit2Ag!xbrgKugiAG9Ig2_84VjCtBW6x-DpB9Aox3x1n_oCHrMu1W-ZDDMlKiorN7OVohqT2UUHSGoJ3ePqTiEJ4bVb$ ): Connection refused
> >
> > Mar 25 10:10:25 kea_home2 kea-dhcp6[2836]: 2024-03-25 10:10:25.130 WARN [kea-dhcp6.ha-hooks/2836.139717207308032] HA_COMMUNICATION_INTERRUPTED communication with kea_home1 is interrupted
> >
> > Mar 25 10:10:26 kea_home2 kea-dhcp6[2836]: 2024-03-25 10:10:26.132 WARN [kea-dhcp6.ha-hooks/2836.139717190522624] HA_HEARTBEAT_COMMUNICATIONS_FAILED failed to send heartbeat to kea_home1 (https://urldefense.com/v3/__http://192.168.100.197:8000/__;!!Hit2Ag!xbrgKugiAG9Ig2_84VjCtBW6x-DpB9Aox3x1n_oCHrMu1W-ZDDMlKiorN7OVohqT2UUHSGoJ3ePqTiEJ4bVb$ ): Connection refused
> >
> > Mar 25 10:10:26 kea_home2 kea-dhcp6[2836]: 2024-03-25 10:10:26.132 WARN [kea-dhcp6.ha-hooks/2836.139717190522624] HA_COMMUNICATION_INTERRUPTED communication with kea_home1 is interrupted
> >
> > Mar 25 10:10:27 kea_home2 kea-dhcp6[2836]: 2024-03-25 10:10:27.136 INFO [kea-dhcp6.ha-hooks/2836.139717215700736] HA_STATE_TRANSITION server transitions from PARTNER-DOWN to WAITING state, partner state is PARTNER-DOWN
> >
> > Mar 25 10:10:27 kea_home2 kea-dhcp6[2836]: 2024-03-25 10:10:27.137 INFO [kea-dhcp6.ha-hooks/2836.139717215700736] HA_LEASE_UPDATES_DISABLED lease updates will not be sent to the partner while in WAITING state
> >
> > Mar 25 10:10:27 kea_home2 kea-dhcp6[2836]: 2024-03-25 10:10:27.137 INFO [kea-dhcp6.ha-hooks/2836.139717215700736] HA_LOCAL_DHCP_DISABLE local DHCP service is disabled while the kea_home2 is in the WAITING state
> >
> > Mar 25 10:10:27 kea_home2 kea-dhcp6[2836]: 2024-03-25 10:10:27.137 INFO [kea-dhcp6.ha-hooks/2836.139717215700736] HA_STATE_TRANSITION server transitions from WAITING to SYNCING state, partner state is PARTNER-DOWN
> >
> > Mar 25 10:10:27 kea_home2 kea-dhcp6[2836]: 2024-03-25 10:10:27.137 INFO [kea-dhcp6.ha-hooks/2836.139717215700736] HA_LEASE_UPDATES_DISABLED lease updates will not be sent to the partner while in SYNCING state
> >
> > Mar 25 10:10:27 kea_home2 kea-dhcp6[2836]: 2024-03-25 10:10:27.137 INFO [kea-dhcp6.ha-hooks/2836.139717215700736] HA_SYNC_START starting lease database synchronization with kea_home1
> >
> > Mar 25 10:10:27 kea_home2 kea-dhcp6[2836]: 2024-03-25 10:10:27.140 INFO [kea-dhcp6.ha-hooks/2836.139717215700736] HA_LEASES_SYNC_LEASE_PAGE_RECEIVED received 3 leases from kea_home1
> >
> > Mar 25 10:10:27 kea_home2 kea-dhcp6[2836]: 2024-03-25 10:10:27.141 INFO [kea-dhcp6.ha-hooks/2836.139717215700736] HA_SYNC_SUCCESSFUL lease database synchronization with kea_home1 completed successfully in 4.350 ms
> >
> > Mar 25 10:10:27 kea_home2 kea-dhcp6[2836]: 2024-03-25 10:10:27.142 INFO [kea-dhcp6.ha-hooks/2836.139717215700736] HA_STATE_TRANSITION server transitions from SYNCING to READY state, partner state is PARTNER-DOWN
> >
> > Mar 25 10:10:27 kea_home2 kea-dhcp6[2836]: 2024-03-25 10:10:27.142 INFO [kea-dhcp6.ha-hooks/2836.139717215700736] HA_LEASE_UPDATES_DISABLED lease updates will not be sent to the partner while in READY state
> >
> >
> >
> > Primary Config:
> >
> >
> >
> > # HA related hooks configuration
> >
> > "hooks-libraries": [{
> >
> > "library": "/usr/lib64/kea/hooks/libdhcp_lease_cmds.so",
> >
> > "parameters": { }
> >
> > }, {
> >
> > "library": "/usr/lib64/kea/hooks/libdhcp_ha.so",
> >
> > "parameters": {
> >
> > "high-availability": [{
> >
> > "this-server-name": "kea_home1",
> >
> > "mode": "hot-standby",
> >
> > "heartbeat-delay": 200,
> >
> > "max-response-delay": 600,
> >
> > "max-ack-delay": 800,
> >
> > "max-unacked-clients": 5,
> >
> > "send-lease-updates": true,
> >
> > "sync-leases": true,
> >
> > "sync-page-limit": 200,
> >
> > "sync-timeout": 600,
> >
> > "delayed-updates-limit": 0,
> >
> > "peers": [{
> >
> > "name": "kea_home1",
> >
> > "url": https://urldefense.com/v3/__http://192.168.100.197:8000/__;!!Hit2Ag!xbrgKugiAG9Ig2_84VjCtBW6x-DpB9Aox3x1n_oCHrMu1W-ZDDMlKiorN7OVohqT2UUHSGoJ3ePqTiEJ4bVb$<https://urldefense.com/v3/__http:/192.168.100.197:8000/__;!!Hit2Ag!xbrgKugiAG9Ig2_84VjCtBW6x-DpB9Aox3x1n_oCHrMu1W-ZDDMlKiorN7OVohqT2UUHSGoJ3ePqTiEJ4bVb$> ,
> >
> > "role": "primary",
> >
> > "auto-failover": true
> >
> > }, {
> >
> > "name": "kea_home2",
> >
> > "url": https://urldefense.com/v3/__http://192.168.100.69:8000/__;!!Hit2Ag!xbrgKugiAG9Ig2_84VjCtBW6x-DpB9Aox3x1n_oCHrMu1W-ZDDMlKiorN7OVohqT2UUHSGoJ3ePqTi1Q4B1j$<https://urldefense.com/v3/__http:/192.168.100.69:8000/__;!!Hit2Ag!xbrgKugiAG9Ig2_84VjCtBW6x-DpB9Aox3x1n_oCHrMu1W-ZDDMlKiorN7OVohqT2UUHSGoJ3ePqTi1Q4B1j$> ,
> >
> > "role": "standby",
> >
> > "auto-failover": true
> >
> > }]
> >
> > }]
> >
> > }
> >
> > }],
> >
> >
> >
> >
> >
> > "Control-agent": {
> >
> > "http-host": "192.168.100.197",
> >
> > // If enabling HA and multi-threading, the 8000 port is used by the HA
> >
> > // hook library http listener. When using HA hook library with
> >
> > // multi-threading to function, make sure the port used by dedicated
> >
> > // listener is different (e.g. 8001) than the one used by CA. Note
> >
> > // the commands should still be sent via CA. The dedicated listener
> >
> > // is specifically for HA updates only.
> >
> > "http-port": 8001,
> >
> >
> >
> >
> >
> > Standby config:
> >
> >
> >
> > # HA related hooks configuration
> >
> > "hooks-libraries": [{
> >
> > "library": "/usr/lib64/kea/hooks/libdhcp_lease_cmds.so",
> >
> > "parameters": { }
> >
> > }, {
> >
> > "library": "/usr/lib64/kea/hooks/libdhcp_ha.so",
> >
> > "parameters": {
> >
> > "high-availability": [{
> >
> > "this-server-name": "kea_home2",
> >
> > "mode": "hot-standby",
> >
> > "heartbeat-delay": 200,
> >
> > "max-response-delay": 600,
> >
> > "max-ack-delay": 800,
> >
> > "max-unacked-clients": 5,
> >
> > "delayed-updates-limit": 0,
> >
> > "send-lease-updates": true,
> >
> > "sync-leases": true,
> >
> > "sync-page-limit": 200,
> >
> > "sync-timeout": 600,
> >
> > "peers": [{
> >
> > "name": "kea_home1",
> >
> > "url": https://urldefense.com/v3/__http://192.168.100.197:8000/__;!!Hit2Ag!xbrgKugiAG9Ig2_84VjCtBW6x-DpB9Aox3x1n_oCHrMu1W-ZDDMlKiorN7OVohqT2UUHSGoJ3ePqTiEJ4bVb$<https://urldefense.com/v3/__http:/192.168.100.197:8000/__;!!Hit2Ag!xbrgKugiAG9Ig2_84VjCtBW6x-DpB9Aox3x1n_oCHrMu1W-ZDDMlKiorN7OVohqT2UUHSGoJ3ePqTiEJ4bVb$> ,
> >
> > "role": "primary",
> >
> > "auto-failover": true
> >
> > }, {
> >
> > "name": "kea_home2",
> >
> > "url": https://urldefense.com/v3/__http://192.168.100.69:8000/__;!!Hit2Ag!xbrgKugiAG9Ig2_84VjCtBW6x-DpB9Aox3x1n_oCHrMu1W-ZDDMlKiorN7OVohqT2UUHSGoJ3ePqTi1Q4B1j$<https://urldefense.com/v3/__http:/192.168.100.69:8000/__;!!Hit2Ag!xbrgKugiAG9Ig2_84VjCtBW6x-DpB9Aox3x1n_oCHrMu1W-ZDDMlKiorN7OVohqT2UUHSGoJ3ePqTi1Q4B1j$> ,
> >
> > "role": "standby",
> >
> > "auto-failover": true
> >
> > }]
> >
> > }]
> >
> > }
> >
> > }],
> >
> >
> >
> > "Control-agent": {
> >
> > "http-host": "192.168.100.69",
> >
> > // If enabling HA and multi-threading, the 8000 port is used by the HA
> >
> > // hook library http listener. When using HA hook library with
> >
> > // multi-threading to function, make sure the port used by dedicated
> >
> > // listener is different (e.g. 8001) than the one used by CA. Note
> >
> > // the commands should still be sent via CA. The dedicated listener
> >
> > // is specifically for HA updates only.
> >
> > "http-port": 8001,
> >
> >
> >
> >
> >
> > Best Regards,
> >
> > Yu
> >
> >
> >
> > --
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> >
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> >
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> ISC funds the development of this software with paid support subscriptions. Contact us at https://urldefense.com/v3/__https://www.isc.org/contact/__;!!Hit2Ag!zoh5xPnvNfIYnDVa8fKOaBy5jIIQIMWT5qUv1AwVKSJJWw6Sv4JGdCWpcT1787WpOLtTS--cCCJ1gbTSITyu$<https://urldefense.com/v3/__https:/www.isc.org/contact/__;!!Hit2Ag!zoh5xPnvNfIYnDVa8fKOaBy5jIIQIMWT5qUv1AwVKSJJWw6Sv4JGdCWpcT1787WpOLtTS--cCCJ1gbTSITyu$> for more information.
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