[Bug 1186662] Re: isc-dhcp-server fails to renew lease file

[Rob Whyte]

After installing Xenial server last week I had problems from the get go
with isc-dhcp-server and client. As it is my gateway I have had a great
deal of trouble. Your suggestions in comment 37 seem to address them, am
waiting to see if my next ISP dhcp renewal leaves me disconnected again.
Effected packages for me are 4.4.4-5ubuntu7 and 4.4.4-5ubuntu8.

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https://bugs.launchpad.net/bugs/1186662

Title:
  isc-dhcp-server fails to renew lease file

Status in isc-dhcp package in Ubuntu:
  Fix Released
Status in isc-dhcp source package in Trusty:
  Triaged

Bug description:
  After raring upgrade, the dhcp server fails to renew lease file when
  it tries to (about every hour).

  The syslog says:
  dhcpd: Can't create new lease file: Permission denied

  It looks like a permission problem, because

  # chown -R dhcpd:dhcpd /var/lib/dhcp

  the above command temporarily solves the issue, until dhcpd is
  restarted: at that time, the ownership of the directory and the lease
  file is set back to root:root.

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