[Kea-users] Fetching Active Leases
Shobhith Chikku
shobhithchikku at gmail.com
Thu Jun 8 13:16:36 UTC 2023
Thanks for the explanation.
Do we have any way to get the current active leases of a server in sync
with the configuration file data?
Thank you.
On Thu, 8 Jun 2023 at 18:08, Darren Ankney <darren.ankney at gmail.com> wrote:
> Hi Shobhith,
>
> Nothing would stop those leases from still showing up if they are
> still active. Since they are not in the lease file, they can be
> removed by restarting the server. You could also remove them with
> lease4-del API command
> (
> https://kea.readthedocs.io/en/latest/arm/hooks.html#the-lease4-del-lease6-del-commands
> ).
> Removing the pool and adding a different pool will not remove active
> leases in the pool. Indeed even removing the subnet wouldn't remove
> leases. But the leases wouldn't still be shown if the subnet ID is
> different in a new subnet.
>
> On Thu, Jun 8, 2023 at 8:31 AM Shobhith Chikku <shobhithchikku at gmail.com>
> wrote:
> >
> > Thanks, Darren,
> > The main issue I face is
> > 1. I have created a scope 3.0.0.10 - 3.0.0.20
> > 2. I have generated leases from that scope.
> > 3. I deleted that scope and created another one in the same subnet
> 3.0.0.50 - 3.0.0.100.
> > 4. When I fetch the active lease, I am also getting the leases from the
> deleted scope 3.0.0.10 - 3.0.0.20 also ( I shouldn't get them right?).
> > How do I solve this?
> > I tried the LFC process, which only cleans up the leases from the lease
> file, but the memory still has them.
> > Here is my config file.
> > {"Dhcp4": {
> > "interfaces-config": {"interfaces": ["eth0"]},
> > "authoritative": true,
> > "multi-threading": {
> > "packet-queue-size": 16,
> > "enable-multi-threading": true,
> > "thread-pool-size": 4
> > },
> > "loggers": [{
> > "debuglevel": 55,
> > "severity": "DEBUG",
> > "output_options": [{
> > "output": "/var/log/kea-dhcp4.log",
> > "flush": true,
> > "maxsize": 204800
> > }],
> > "name": "kea-dhcp4"
> > }],
> > "lease-database": {
> > "name": "/opt/dhcp/dhcp/db/dhcp4.leases",
> > "persist": true,
> > "type": "memfile",
> > "lfc-interval":60,
> > },
> > "hooks-libraries": [{"library":
> "/opt/dhcp/lib/kea/hooks/libdhcp_lease_cmds.so"}],
> > "server-hostname": "server-47",
> > "control-socket": {
> > "socket-type": "unix",
> > "socket-name": "/opt/dhcp/dhcp/kea4-ctrl-socket"
> > },
> > "decline-probation-period": 7200,
> > "sanity-checks": {"lease-checks": "fix-del"},
> > "subnet4": [{
> > "subnet": "3.0.0.0/8",
> > "valid-lifetime": 86400,
> > "option-data": [
> > {
> > "data": "www.shobhith.com",
> > "name": "domain-name"
> > },
> > {
> > "data": "86400",
> > "name": "dhcp-lease-time"
> > },
> > {
> > "data": "255.0.0.0",
> > "name": "subnet-mask"
> > },
> > {
> > "data": "3.0.0.1",
> > "name": "routers"
> > }
> > ],
> > "pools": [{
> > "client-class": "allow-client",
> > "pool": "3.0.0.50-3.0.0.100"
> > }],
> > "id": 818110
> > }],
> > "client-classes": [
> > {"name": "deny-client"},
> > {
> > "test": "(not(member('deny-client')))",
> > "name": "allow-client"
> > }
> > ]
> > }}
> > Thank you.
> >
> > On Thu, 8 Jun 2023 at 17:44, Darren Ankney <darren.ankney at gmail.com>
> wrote:
> >>
> >> Hi Shobhith,
> >>
> >> It is difficult to answer without seeing your Kea configuration.
> >> Speculation would be that the lease is in memory and either not being
> >> recorded to the file or was removed from the file somehow? When using
> >> 'memfile' for lease storage, the leases are actually in memory. The
> >> file is only a record that Kea can use to read the leases back into
> >> memory in the case it is restarted. Its possible to setup memfile,
> >> set a filename, and not have leases written to the file if you have
> >> "persist": false in the lease-database configuration.
> >>
> >> Thank you,
> >>
> >> Darren Ankney
> >>
> >> On Thu, Jun 8, 2023 at 7:10 AM Shobhith Chikku <
> shobhithchikku at gmail.com> wrote:
> >> >
> >> > Hi,
> >> > When I am trying to fetch active leases, even though my lease file is
> empty, I am getting leases when I execute
> >> > /usr/bin/echo '{"command":"lease4-get-all"}' | /usr/bin/socat -
> UNIX:/opt/tcpwave/timsdhcp/kea4-ctrl-socket | /usr/bin/jq
> >> > Below mentioned is my lease file
> >> > cat /opt/test/dhcp/db/dhcp4.leases
> >> >
> address,hwaddr,client_id,valid_lifetime,expire,subnet_id,fqdn_fwd,fqdn_rev,hostname,state,user_context
> >> > When I execute lease4-get-all command, I get leases
> >> > {
> >> > "arguments": {
> >> > "leases": [
> >> > {
> >> > "client-id": "01:2f:ff:ff:00:00:01",
> >> > "cltt": 1686215869,
> >> > "fqdn-fwd": false,
> >> > "fqdn-rev": false,
> >> > "hostname": "dhcp-client-000001",
> >> > "hw-address": "2f:ff:ff:00:00:01",
> >> > "ip-address": "3.0.0.2",
> >> > "state": 0,
> >> > "subnet-id": 818110,
> >> > "valid-lft": 86400
> >> > } ]
> >> > },
> >> > "result": 0,
> >> > "text": "10 IPv4 lease(s) found."
> >> > }
> >> > Where am I getting this from?
> >> > Thanks in advance
> >> > Shobhith
> >> > --
> >> > ISC funds the development of this software with paid support
> subscriptions. Contact us at https://www.isc.org/contact/ for more
> information.
> >> >
> >> > To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users
> .
> >> >
> >> > Kea-users mailing list
> >> > Kea-users at lists.isc.org
> >> > https://lists.isc.org/mailman/listinfo/kea-users
> >> --
> >> ISC funds the development of this software with paid support
> subscriptions. Contact us at https://www.isc.org/contact/ for more
> information.
> >>
> >> To unsubscribe visit https://lists.isc.org/mailman/listinfo/kea-users.
> >>
> >> Kea-users mailing list
> >> Kea-users at lists.isc.org
> >> https://lists.isc.org/mailman/listinfo/kea-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.isc.org/pipermail/kea-users/attachments/20230608/5639eeba/attachment-0001.htm>
More information about the Kea-users
mailing list