dhclient process lifetime

[Lukas Erlacher]

Hi Pavel,

thanks for your reply.

In fact, I see no such message. Here is what I see:

> (testenv) root at manarati-two:~# pgrep -a dhclient                                                                                                                                                                                               
> (testenv) root at manarati-two:~# cat /run/dhclient.eth0.pid
> 29121
> (testenv) root at manarati-two:~# dhclient -v -w -4 -pf /var/run/dhclient.eth0.pid -lf /var/lib/dhcp/dhclient.eth0.leases eth0
> Internet Systems Consortium DHCP Client 4.3.5
> Copyright 2004-2016 Internet Systems Consortium.
> All rights reserved.
> For info, please visit https://www.isc.org/software/dhcp/
> 
> Listening on LPF/eth0/b8:27:eb:be:35:8a
> Sending on   LPF/eth0/b8:27:eb:be:35:8a
> Sending on   Socket/fallback
> DHCPREQUEST of 192.168.13.151 on eth0 to 255.255.255.255 port 67
> DHCPACK of 192.168.13.151 from 192.168.13.1
> RTNETLINK answers: File exists
> bound to 192.168.13.151 -- renewal in 789 seconds.
> (testenv) root at manarati-two:~# pgrep -a dhclient
> 10875 dhclient -v -w -4 -pf /var/run/dhclient.eth0.pid -lf /var/lib/dhcp/dhclient.eth0.leases eth0
> (testenv) root at manarati-two:~# cat /run/dhclient.eth0.pid
> 10875
> (testenv) root at manarati-two:~# dhclient -v -w -4 -pf /var/run/dhclient.eth0.pid -lf /var/lib/dhcp/dhclient.eth0.leases eth0
> Internet Systems Consortium DHCP Client 4.3.5
> Copyright 2004-2016 Internet Systems Consortium.
> All rights reserved.
> For info, please visit https://www.isc.org/software/dhcp/
> 
> Listening on LPF/eth0/b8:27:eb:be:35:8a
> Sending on   LPF/eth0/b8:27:eb:be:35:8a
> Sending on   Socket/fallback
> DHCPREQUEST of 192.168.13.151 on eth0 to 255.255.255.255 port 67
> DHCPACK of 192.168.13.151 from 192.168.13.1
> RTNETLINK answers: File exists
> bound to 192.168.13.151 -- renewal in 729 seconds.
> (testenv) root at manarati-two:~# pgrep -a dhclient
> 10875 dhclient -v -w -4 -pf /var/run/dhclient.eth0.pid -lf /var/lib/dhcp/dhclient.eth0.leases eth0
> 10902 dhclient -v -w -4 -pf /var/run/dhclient.eth0.pid -lf /var/lib/dhcp/dhclient.eth0.leases eth0
> (testenv) root at manarati-two:~# cat /run/dhclient.eth0.pid
> 10902
> (testenv) root at manarati-two:~#

So for some reason dhclient is not performing the check for a running
instance correctly.

On 02/07/2018 02:23 AM, Pavel Zhukov wrote:
> Lukas Erlacher <erlacher at in.tum.de> writes:
> Hello,
> 
> You have see something like
> # dhclient -v -4 -pf /run/dhclient.eth0.pid -lf /var/lib/dhcp/dhclient.eth0.leases client1
> dhclient(30189) is already running - exiting. 
> 
> the pid (30189) is stored in  /run/dhclient.eth0.pid and it prevent
> second copy of dhclient to be started as it was been
> specified in your command line. Can you check/share content of this
> file? 
> 

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