Yes. That configuration is valid.
On 29/02/2024 23:14, Xiao, Yu (CCI-Atlanta) via Kea-users wrote:
Hi Victoria,
Thank you for your prompt response! But I don’t understand your
answer. Are you able to support the following config? Having two
servers with IPv4 addresses for HA use but serving as kea-dhcp6 servers?
"Dhcp6":{
"hooks-libraries":[
{
"library":"/usr/lib/kea/hooks/libdhcp_lease_cmds.so
<https://urldefense.com/v3/__http:/libdhcp_lease_cmds.so/__;!!Hit2Ag!06m2yzYaZYgAjWXnEV6uDsNyyqb1YedvAndIPn2eo6KzSrsYKWP56bTaCyTl-2p7Zy0g8bQo$>",
"parameters":{ }
},
{
"library":"/usr/lib/kea/hooks/libdhcp_ha.so
<https://urldefense.com/v3/__http:/libdhcp_ha.so/__;!!Hit2Ag!06m2yzYaZYgAjWXnEV6uDsNyyqb1YedvAndIPn2eo6KzSrsYKWP56bTaCyTl-2p7ZyoaWzky$>",
"parameters":{
"high-availability":[ {
"this-server-name":"server1",
"mode":"load-balancing",
"peers":[
{
"name":"server1",
"url":http://192.168.56.33:8000/
<https://urldefense.com/v3/__http:/192.168.56.33:8000/__;!!Hit2Ag!06m2yzYaZYgAjWXnEV6uDsNyyqb1YedvAndIPn2eo6KzSrsYKWP56bTaCyTl-2p7Z2xRBC5P$>,
"role":"primary"
},
{
"name":"server2",
"url":http://192.168.56.66:8000/
<https://urldefense.com/v3/__http:/192.168.56.66:8000/__;!!Hit2Ag!06m2yzYaZYgAjWXnEV6uDsNyyqb1YedvAndIPn2eo6KzSrsYKWP56bTaCyTl-2p7Z1dbwcxm$>,
"role":"secondary"
}
],
"state-machine":{
"states":[
{
"state":"waiting",
"pause":"once"
}
]
}
} ]
}
}
],
...
}
Best Regards,
Yu
*From: *Victoria Risk <vi...@isc.org>
*Date: *Thursday, February 29, 2024 at 4:09 PM
*To: *Kea user's list <kea-users@lists.isc.org>, Xiao, Yu
(CCI-Atlanta) <yu.x...@cox.com>
*Subject: *[EXTERNAL] Re: [Kea-users] Question regarding to HA for
kea-dhcp6 VMs
Xiao,
This is actually exactly why we implemented HA instead of DHCPv4
failover! So that you can use the same mechanism for DHCPv6.
I am sorry if the documentation was misleading at all, I think the
documentation focuses on DHCPv4 because that is what most people are
using.
Vicky
On Feb 29, 2024, at 4:04 PM, Xiao, Yu (CCI-Atlanta) via Kea-users
<kea-users@lists.isc.org> wrote:
Greetings,
I have an interesting question for you esp for ISC developers. I
want to only use kea-dhcp6, which means I need VMs working as DHCP
servers to provide IPv6 addresses to other devices so those
clients can have IPv6 addresses. But I don’t care or need that my
kea-dhcp6 servers themselves have IPv6 addresses or not.
But the problem is that in the documentation, I can see they give
some examples which all put the redundancy configurations under
the*Dhcp4*configuration section. Does it imply that in order to
use the HA feature for kea-dhcp6 servers, my DHCP servers
themselves must be configured to have their own IPv6 addresses? I
don’t think this makes any sense since in reality we only need the
connectivity between primary and secondary servers no matter this
connectivity is based on IPv4 or IPv6.
"Dhcp4": {
"hooks-libraries": [
{
"library":"/usr/lib/kea/hooks/libdhcp_lease_cmds.so
<https://urldefense.com/v3/__http:/libdhcp_lease_cmds.so/__;!!Hit2Ag!06m2yzYaZYgAjWXnEV6uDsNyyqb1YedvAndIPn2eo6KzSrsYKWP56bTaCyTl-2p7Zy0g8bQo$>",
"parameters": { }
},
{
"library":"/usr/lib/kea/hooks/libdhcp_ha.so
<https://urldefense.com/v3/__http:/libdhcp_ha.so/__;!!Hit2Ag!06m2yzYaZYgAjWXnEV6uDsNyyqb1YedvAndIPn2eo6KzSrsYKWP56bTaCyTl-2p7ZyoaWzky$>",
"parameters": {
"high-availability": [ {
"this-server-name":"server1",
"mode":"load-balancing",
"peers": [
{
"name":"server1",
"url":http://192.168.56.33:8000/
<https://urldefense.com/v3/__http:/192.168.56.33:8000/__;!!Hit2Ag!06m2yzYaZYgAjWXnEV6uDsNyyqb1YedvAndIPn2eo6KzSrsYKWP56bTaCyTl-2p7Z2xRBC5P$>,
"role":"primary"
},
{
"name":"server2",
"url":http://192.168.56.66:8000/
<https://urldefense.com/v3/__http:/192.168.56.66:8000/__;!!Hit2Ag!06m2yzYaZYgAjWXnEV6uDsNyyqb1YedvAndIPn2eo6KzSrsYKWP56bTaCyTl-2p7Z1dbwcxm$>,
"role":"secondary"
}
],
"state-machine": {
"states": [
{
"state":"waiting",
"pause":"once"
}
]
}
} ]
}
}
],
...
}
May I ask can I configure my servers like this?
"Dhcp6":{
"hooks-libraries":[
{
"library":"/usr/lib/kea/hooks/libdhcp_lease_cmds.so
<https://urldefense.com/v3/__http:/libdhcp_lease_cmds.so/__;!!Hit2Ag!06m2yzYaZYgAjWXnEV6uDsNyyqb1YedvAndIPn2eo6KzSrsYKWP56bTaCyTl-2p7Zy0g8bQo$>",
"parameters":{ }
},
{
"library":"/usr/lib/kea/hooks/libdhcp_ha.so
<https://urldefense.com/v3/__http:/libdhcp_ha.so/__;!!Hit2Ag!06m2yzYaZYgAjWXnEV6uDsNyyqb1YedvAndIPn2eo6KzSrsYKWP56bTaCyTl-2p7ZyoaWzky$>",
"parameters":{
"high-availability":[ {
"this-server-name":"server1",
"mode":"load-balancing",
"peers":[
{
"name":"server1",
"url":http://192.168.56.33:8000/
<https://urldefense.com/v3/__http:/192.168.56.33:8000/__;!!Hit2Ag!06m2yzYaZYgAjWXnEV6uDsNyyqb1YedvAndIPn2eo6KzSrsYKWP56bTaCyTl-2p7Z2xRBC5P$>,
"role":"primary"
},
{
"name":"server2",
"url":http://192.168.56.66:8000/
<https://urldefense.com/v3/__http:/192.168.56.66:8000/__;!!Hit2Ag!06m2yzYaZYgAjWXnEV6uDsNyyqb1YedvAndIPn2eo6KzSrsYKWP56bTaCyTl-2p7Z1dbwcxm$>,
"role":"secondary"
}
],
"state-machine":{
"states":[
{
"state":"waiting",
"pause":"once"
}
]
}
} ]
}
}
],
...
}
Related section:
https://downloads.isc.org/isc/kea/2.5.5/doc/html/arm/hooks.html#hooks-high-availability
<https://urldefense.com/v3/__https:/downloads.isc.org/isc/kea/2.5.5/doc/html/arm/hooks.html*hooks-high-availability__;Iw!!Hit2Ag!06m2yzYaZYgAjWXnEV6uDsNyyqb1YedvAndIPn2eo6KzSrsYKWP56bTaCyTl-2p7Z_ukr4C_$>
Best Regards,
Yu
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