Bug 1459480

Summary: [RFE] list of all/expired leases using omshell or another tool for dhcpd
Product: Red Hat Enterprise Linux 7 Reporter: dbodnarc
Component: dhcpAssignee: Pavel Zhukov <pzhukov>
Status: CLOSED WONTFIX QA Contact: Release Test Team <release-test-team-automation>
Severity: low Docs Contact:
Priority: low    
Version: 7.4CC: dbodnarc, thozza
Target Milestone: rcKeywords: FutureFeature
Target Release: 7.5   
Hardware: All   
OS: Linux   
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Last Closed: 2017-09-20 12:48:27 UTC Type: Bug
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Bug Blocks: 1420851, 1465928    

Description dbodnarc 2017-06-07 09:20:59 UTC 
Description of problem:
missing of omshel feature or tool for checking list of all/expired leases for dhcpd

Version-Release number of selected component (if applicable):
dhcp-4.2.5-36.el7.x86_64

How reproducible:
When the dhcpd.leases file is populated with expired leases and unexpired leases it is difficult to read unless you make proper filtering. 

Customer asks for some form of command to give back all/expired leases without necessarily parsing of "/var/lib/dhcpd/dhcpd.leases" and /etc/dhpc/dhcpd.conf files
Comment 12 Pavel Zhukov 2017-09-20 12:48:27 UTC 
(In reply to dbodnarc from comment #0)
> Description of problem:
> missing of omshel feature or tool for checking list of all/expired leases
> for dhcpd
> 
> Version-Release number of selected component (if applicable):
> dhcp-4.2.5-36.el7.x86_64
> 
> How reproducible:
> When the dhcpd.leases file is populated with expired leases and unexpired
> leases it is difficult to read unless you make proper filtering. 
> 
> Customer asks for some form of command to give back all/expired leases
> without necessarily parsing of "/var/lib/dhcpd/dhcpd.leases" and
> /etc/dhpc/dhcpd.conf files

Parsing of leases file is recommended as it's the only source of truth in case of daemon restarts. Manual lease expiration on server side is dangerous as it may cause ip addresses conflicts. There are the way how to release lease using omshell or send DHCPRELEASE message on behalf of client but it's dangerous and unsupported.

Upstream ships script for leases parsing called list-leases.pl but it's shipped "as is" (in contrib directory i.e. without support/maintenance commitment)  and have nothing in common with dhcpd itself. So closing the bug as wontfix.