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Maniphest T4425

Hide DHCP leases from interfaces without active DHCP client
Resolved (N/A)PublicFEATURE REQUEST
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Description

The command show dhcp client leases displays all the leases by parsing the ^dhclient_.*.lease$ files in /var/lib/dhcp/.
When the DHCP client is removed from an interface, a lease file stays there and the command continues to show leases from it.

Would be better to hide such leases by default. For example, we can filter lease files and show only those of them for which exists corresponding .pid files.

The code that handles this located in: https://github.com/vyos/vyatta-op/blob/bfec3bce801b15fda969a1bd97e51b9e19dfef93/scripts/vyatta-show-dhclient.pl

Details

Difficulty level
Unknown (require assessment)
Version
-
Why the issue appeared?
Will be filled on close
Is it a breaking change?
Perfectly compatible
Issue type
Improvement (missing useful functionality)

Event Timeline

zsdc created this task.May 13 2022, 2:12 PM
pasik added a subscriber: pasik.May 13 2022, 2:30 PM
zedalert added a subscriber: zedalert.May 13 2022, 4:54 PM
dmbaturin triaged this task as Low priority.Jan 10 2024, 9:56 PM
dmbaturin added a project: VyOS 1.5 Circinus.
Viacheslav closed this task as Resolved N/A.Jan 17 2024, 12:30 PM
Viacheslav added a subscriber: Viacheslav.

Fixed for both VyOS 1.5-rolling-202401140026 and VyOS 1.4.0-rc2

vyos@r4# run show dh
dhcp    dhcpv6  
[edit]
vyos@r4# run show dhcp client leases 
Interface    eth2
IP address   192.168.100.197               [Active]
Subnet Mask  255.255.255.0
Domain Name  net-v6
Router       192.168.100.1
Name Server  192.168.100.1
DHCP Server  192.168.100.1
DHCP Server  3600
VRF          default
Last Update  Wed Jan 17 14:26:46 EET 2024
Expiry       Wed Jan 17 15:26:46 EET 2024

[edit]
vyos@r4# delete interfaces ethernet eth2 address 
[edit]
vyos@r4# commit
[edit]
vyos@r4# run show dhcp client leases 
[edit]
vyos@r4# 
[edit]
vyos@r4#