[Kea-users] HA - Hot-Stanby Problem - Kea v1.6.1/2
Thomas Markwalder
tmark at isc.org
Tue Jun 23 20:14:30 UTC 2020
The mostfrequent cause for this is non-compliant clients that do not set
the SECS field on retries. If clients are not setting this field > 0 on
retries they will not be detected as unacked. Take a look at the packet
capture and/or try setting this to 0.
See:
https://kea.readthedocs.io/en/latest/arm/hooks.html#load-balancing-configuration.
Following the sample config there is discussion of these parameters.
On 6/23/20 3:50 PM, Ismael Suarez wrote:
> With a similar config (basically the same), I am facing the same situation on 1.6.2. Anyone care to point out some obvios configs that we might be missing?
>
>
>
> --
>
> Ism
>
>
> -----Original Message-----
> From: Pizu <pizpower at gmail.com<mailto:Pizu%20%3cpizpower at gmail.com%3e>>
> To: kea-users at lists.isc.org<mailto:kea-users at lists.isc.org>
> Subject: [Kea-users] HA - Hot-Stanby Problem - Kea v1.6.1/2
> Date: Mon, 22 Jun 2020 16:47:23 +0200
>
> Hi,
>
> Am testing the HA and if I switch off the primary node nothing works. can you please help?
>
> Primary Configuration:
>
> "hooks-libraries": [{
> "library": "/usr/local/lib/kea/hooks/libdhcp_lease_cmds.so",
> "parameters": {}
> }, {
> "library": "/usr/local/lib/kea/hooks/libdhcp_stat_cmds.so",
> "parameters": {}
> }, {
> "library": "/usr/local/lib/kea/hooks/libdhcp_ha.so",
> "parameters": {
> "high-availability": [{
> "heartbeat-delay": 10000,
> "max-ack-delay": 10000,
> "max-response-delay": 45000,
> "max-unacked-clients": 10,
> "mode": "hot-standby",
> "peers": [{
> "auto-failover": true,
> "name": "mstkeadhcpsrv01.corporate.intra",
> "role": "primary",
> "url": "http://172.16.193.39:8080/"
> }, {
> "auto-failover": true,
> "name": "ztnkeadhcpsrv01.corporate.intra",
> "role": "standby",
> "url": "http://172.16.60.39:8080/"
> }
> ],
> "send-lease-updates": true,
> "sync-leases": true,
> "sync-page-limit": 10000,
> "sync-timeout": 60000,
> "this-server-name": "mstkeadhcpsrv01.corporate.intra"
> }
> ]
> }
> }
> ],
>
> Standby Configuration:
>
> "hooks-libraries": [{
> "library": "/usr/local/lib/kea/hooks/libdhcp_lease_cmds.so",
> "parameters": {}
> }, {
> "library": "/usr/local/lib/kea/hooks/libdhcp_stat_cmds.so",
> "parameters": {}
> }, {
> "library": "/usr/local/lib/kea/hooks/libdhcp_ha.so",
> "parameters": {
> "high-availability": [{
> "heartbeat-delay": 10000,
> "max-ack-delay": 10000,
> "max-response-delay": 45000,
> "max-unacked-clients": 10,
> "mode": "hot-standby",
> "peers": [{
> "auto-failover": true,
> "name": "mstkeadhcpsrv01.corporate.intra",
> "role": "primary",
> "url": "http://172.16.193.39:8080/"
> }, {
> "auto-failover": true,
> "name": "ztnkeadhcpsrv01.corporate.intra",
> "role": "standby",
> "url": "http://172.16.60.39:8080/"
> }
> ],
> "send-lease-updates": true,
> "sync-leases": true,
> "sync-page-limit": 10000,
> "sync-timeout": 60000,
> "this-server-name": "ztnkeadhcpsrv01.corporate.intra"
> }
> ]
> }
> }
> ],
>
> Regards,
>
> David
>
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