subject:"\[Touch\-packages\] \[Bug 1633619\] Re\: dhclient \-1 exits 0 when no lease found"

[Touch-packages] [Bug 1633619] Re: dhclient -1 exits 0 when no lease found

2016-11-02 Thread Scott Moser

Steve,
Good sleuthing.

Bug 974284 has good info in it.

This is definitely tricky.
I think we have the following cases to consider and may be at odds.
a.) dhclient -1 should exit failure as documented.
b.) we need a reliable point in boot where all static networking is configured.
c.) Ill timed reboot (or recovery from lab power failure)
a system is configured for dhcp is rebooted while the dhcp server is 
unavailable.
It seems better for this system to keep trying to get an IP address as 
otherwise
the system will be offline forever.  
d.) Any dhcp server downtime and failed lease renewal.
a system is configured for dhcp and initially succeeds, but while re-trying 
a lease
the dhcp server is down for scheduled maintenance.  A failure to release 
here
results in system offline if dhclient takes down the interface.
This is mentioned at 
https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/838968/comments/11

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Title:
  dhclient -1 exits 0 when no lease found

Status in isc-dhcp package in Ubuntu:
  Confirmed

Bug description:
  I've tried this in containers of xenial, trusty and yakkety.

  i've created a lxc network that does not have dhcp4.

  See https://github.com/lxc/lxd/issues/2481 for some info on how to do
  that.

  Then, I launch an instance:

  $ lxc launch ubuntu-daily:xenial --profile=sm-test-profile2 x1
  % killall dhclient
  % dhclient -r eth0
  % dhclient -1 -v eth0
  Internet Systems Consortium DHCP Client 4.3.3
  Copyright 2004-2015 Internet Systems Consortium.
  All rights reserved.
  For info, please visit https://www.isc.org/software/dhcp/

  Listening on LPF/eth0/00:16:3e:b8:e6:70
  Sending on   LPF/eth0/00:16:3e:b8:e6:70
  Sending on   Socket/fallback
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 (xid=0xc08cb53c)

  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 9 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 19 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 7 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 12 (xid=0xc08cb53c)
  ..
  No DHCPOFFERS received.
  No working leases in persistent database - sleeping.

  % echo $?
  0
  % ps axw | grep dhcl
356 ?Ss 0:00 dhclient -1 -v eth0

  
  the man page says of the '-1' option:
     -1 Try to get a lease once.  On  failure  exit  with  code  2.   In
    DHCPv6 this sets the maximum duration of the initial exchange to
    timeout (from dhclient.conf with a default of sixty seconds).

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: isc-dhcp-client 4.3.3-5ubuntu15
  ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
  Uname: Linux 4.8.0-22-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
  ApportVersion: 2.20.3-0ubuntu8
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Oct 14 16:59:45 2016
  DhclientLeases:

  EcryptfsInUse: Yes
  InstallationDate: Installed on 2015-07-23 (449 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150722.1)
  SourcePackage: isc-dhcp
  UpgradeStatus: No upgrade log present (probably fresh install)

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[Touch-packages] [Bug 1633619] Re: dhclient -1 exits 0 when no lease found

2016-10-19 Thread Steve Langasek

According to the bzr history in lp:ubuntu/wily/isc-dhcp, this patch is
related to bug #974284:

committer: Stéphane Graber 
branch nick: isc-dhcp
timestamp: Wed 2012-09-12 17:30:23 -0400
message:
  Set onetry = 0 early enough to actually work. (LP: #974284)

And Scott, you filed that bug; it seems the current behavior is exactly
what you requested?

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https://bugs.launchpad.net/bugs/1633619

Title:
  dhclient -1 exits 0 when no lease found

Status in isc-dhcp package in Ubuntu:
  Confirmed

Bug description:
  I've tried this in containers of xenial, trusty and yakkety.

  i've created a lxc network that does not have dhcp4.

  See https://github.com/lxc/lxd/issues/2481 for some info on how to do
  that.

  Then, I launch an instance:

  $ lxc launch ubuntu-daily:xenial --profile=sm-test-profile2 x1
  % killall dhclient
  % dhclient -r eth0
  % dhclient -1 -v eth0
  Internet Systems Consortium DHCP Client 4.3.3
  Copyright 2004-2015 Internet Systems Consortium.
  All rights reserved.
  For info, please visit https://www.isc.org/software/dhcp/

  Listening on LPF/eth0/00:16:3e:b8:e6:70
  Sending on   LPF/eth0/00:16:3e:b8:e6:70
  Sending on   Socket/fallback
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 (xid=0xc08cb53c)

  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 9 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 19 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 7 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 12 (xid=0xc08cb53c)
  ..
  No DHCPOFFERS received.
  No working leases in persistent database - sleeping.

  % echo $?
  0
  % ps axw | grep dhcl
356 ?Ss 0:00 dhclient -1 -v eth0

  
  the man page says of the '-1' option:
     -1 Try to get a lease once.  On  failure  exit  with  code  2.   In
    DHCPv6 this sets the maximum duration of the initial exchange to
    timeout (from dhclient.conf with a default of sixty seconds).

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: isc-dhcp-client 4.3.3-5ubuntu15
  ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
  Uname: Linux 4.8.0-22-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
  ApportVersion: 2.20.3-0ubuntu8
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Oct 14 16:59:45 2016
  DhclientLeases:

  EcryptfsInUse: Yes
  InstallationDate: Installed on 2015-07-23 (449 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150722.1)
  SourcePackage: isc-dhcp
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
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[Touch-packages] [Bug 1633619] Re: dhclient -1 exits 0 when no lease found

2016-10-19 Thread Steve Langasek

Here is the behavior on either 14.04 or 16.04:

# dhclient -1 -v virbr0
Internet Systems Consortium DHCP Client 4.2.4
Copyright 2004-2012 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/

Listening on LPF/virbr0/52:54:00:05:e1:f3
Sending on   LPF/virbr0/52:54:00:05:e1:f3
Sending on   Socket/fallback
DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 3 (xid=0xe7ef8212)
DHCPDISCOVER on virbr0 to 255.255.255.255 port 67 interval 1 (xid=0xe7ef8212)
No DHCPOFFERS received.
No working leases in persistent database - sleeping.
# ps awxfu|grep dh.*virbr
root 16796  0.0  0.0   8868   792 pts/36   S+   05:31   0:00  |   | 
  \_ grep dh.*virbr
root 16772  0.0  0.0  10220  4368 ?Ss   05:30   0:00  \_ 
dhclient -1 -v virbr0
#

Not only does it not return the documented exit code, it also
backgrounds itself and continues polling.  So the -1 option seems to be
completely broken.

I've looked at the source package, and this is due to
debian/patches/onetry_retry_after_initial_success.  The addition of this
patch isn't documented in the changelog, there are no referenced bugs,
and the patch description doesn't make sense to me; assigning to
stgraber, who is listed as the author of this patch.

** Changed in: isc-dhcp (Ubuntu)
 Assignee: (unassigned) => Stéphane Graber (stgraber)

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You received this bug notification because you are a member of Ubuntu
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https://bugs.launchpad.net/bugs/1633619

Title:
  dhclient -1 exits 0 when no lease found

Status in isc-dhcp package in Ubuntu:
  Confirmed

Bug description:
  I've tried this in containers of xenial, trusty and yakkety.

  i've created a lxc network that does not have dhcp4.

  See https://github.com/lxc/lxd/issues/2481 for some info on how to do
  that.

  Then, I launch an instance:

  $ lxc launch ubuntu-daily:xenial --profile=sm-test-profile2 x1
  % killall dhclient
  % dhclient -r eth0
  % dhclient -1 -v eth0
  Internet Systems Consortium DHCP Client 4.3.3
  Copyright 2004-2015 Internet Systems Consortium.
  All rights reserved.
  For info, please visit https://www.isc.org/software/dhcp/

  Listening on LPF/eth0/00:16:3e:b8:e6:70
  Sending on   LPF/eth0/00:16:3e:b8:e6:70
  Sending on   Socket/fallback
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 (xid=0xc08cb53c)

  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 9 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 19 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 7 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 12 (xid=0xc08cb53c)
  ..
  No DHCPOFFERS received.
  No working leases in persistent database - sleeping.

  % echo $?
  0
  % ps axw | grep dhcl
356 ?Ss 0:00 dhclient -1 -v eth0

  
  the man page says of the '-1' option:
     -1 Try to get a lease once.  On  failure  exit  with  code  2.   In
    DHCPv6 this sets the maximum duration of the initial exchange to
    timeout (from dhclient.conf with a default of sixty seconds).

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: isc-dhcp-client 4.3.3-5ubuntu15
  ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
  Uname: Linux 4.8.0-22-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
  ApportVersion: 2.20.3-0ubuntu8
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Oct 14 16:59:45 2016
  DhclientLeases:

  EcryptfsInUse: Yes
  InstallationDate: Installed on 2015-07-23 (449 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150722.1)
  SourcePackage: isc-dhcp
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1633619/+subscriptions

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[Touch-packages] [Bug 1633619] Re: dhclient -1 exits 0 when no lease found

2016-10-17 Thread Scott Moser

** Changed in: isc-dhcp (Ubuntu)
   Importance: Undecided => Medium

** Changed in: isc-dhcp (Ubuntu)
   Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1633619

Title:
  dhclient -1 exits 0 when no lease found

Status in isc-dhcp package in Ubuntu:
  Confirmed

Bug description:
  I've tried this in containers of xenial, trusty and yakkety.

  i've created a lxc network that does not have dhcp4.

  See https://github.com/lxc/lxd/issues/2481 for some info on how to do
  that.

  Then, I launch an instance:

  $ lxc launch ubuntu-daily:xenial --profile=sm-test-profile2 x1
  % killall dhclient
  % dhclient -r eth0
  % dhclient -1 -v eth0
  Internet Systems Consortium DHCP Client 4.3.3
  Copyright 2004-2015 Internet Systems Consortium.
  All rights reserved.
  For info, please visit https://www.isc.org/software/dhcp/

  Listening on LPF/eth0/00:16:3e:b8:e6:70
  Sending on   LPF/eth0/00:16:3e:b8:e6:70
  Sending on   Socket/fallback
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 (xid=0xc08cb53c)

  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 9 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 19 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 7 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 12 (xid=0xc08cb53c)
  ..
  No DHCPOFFERS received.
  No working leases in persistent database - sleeping.

  % echo $?
  0
  % ps axw | grep dhcl
356 ?Ss 0:00 dhclient -1 -v eth0

  
  the man page says of the '-1' option:
     -1 Try to get a lease once.  On  failure  exit  with  code  2.   In
    DHCPv6 this sets the maximum duration of the initial exchange to
    timeout (from dhclient.conf with a default of sixty seconds).

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: isc-dhcp-client 4.3.3-5ubuntu15
  ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
  Uname: Linux 4.8.0-22-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
  ApportVersion: 2.20.3-0ubuntu8
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Oct 14 16:59:45 2016
  DhclientLeases:

  EcryptfsInUse: Yes
  InstallationDate: Installed on 2015-07-23 (449 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150722.1)
  SourcePackage: isc-dhcp
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1633619/+subscriptions

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[Touch-packages] [Bug 1633619] Re: dhclient -1 exits 0 when no lease found

2016-10-14 Thread Scott Moser

for reference, you can make it fail faster like this in
/etc/dhcp/dhclient.conf


timeout 3;
retry 3;
#reboot 10;
select-timeout 5;
initial-interval 1;

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Title:
  dhclient -1 exits 0 when no lease found

Status in isc-dhcp package in Ubuntu:
  New

Bug description:
  I've tried this in containers of xenial, trusty and yakkety.

  i've created a lxc network that does not have dhcp4.

  See https://github.com/lxc/lxd/issues/2481 for some info on how to do
  that.

  Then, I launch an instance:

  $ lxc launch ubuntu-daily:xenial --profile=sm-test-profile2 x1
  % killall dhclient
  % dhclient -r eth0
  % dhclient -1 -v eth0
  Internet Systems Consortium DHCP Client 4.3.3
  Copyright 2004-2015 Internet Systems Consortium.
  All rights reserved.
  For info, please visit https://www.isc.org/software/dhcp/

  Listening on LPF/eth0/00:16:3e:b8:e6:70
  Sending on   LPF/eth0/00:16:3e:b8:e6:70
  Sending on   Socket/fallback
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 3 (xid=0xc08cb53c)

  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 9 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 19 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 7 (xid=0xc08cb53c)
  DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 12 (xid=0xc08cb53c)
  ..
  No DHCPOFFERS received.
  No working leases in persistent database - sleeping.

  % echo $?
  0
  % ps axw | grep dhcl
356 ?Ss 0:00 dhclient -1 -v eth0

  
  the man page says of the '-1' option:
     -1 Try to get a lease once.  On  failure  exit  with  code  2.   In
    DHCPv6 this sets the maximum duration of the initial exchange to
    timeout (from dhclient.conf with a default of sixty seconds).

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: isc-dhcp-client 4.3.3-5ubuntu15
  ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
  Uname: Linux 4.8.0-22-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
  ApportVersion: 2.20.3-0ubuntu8
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Oct 14 16:59:45 2016
  DhclientLeases:

  EcryptfsInUse: Yes
  InstallationDate: Installed on 2015-07-23 (449 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Alpha amd64 (20150722.1)
  SourcePackage: isc-dhcp
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1633619/+subscriptions

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[Touch-packages] [Bug 1633619] Re: dhclient -1 exits 0 when no lease found

[Touch-packages] [Bug 1633619] Re: dhclient -1 exits 0 when no lease found

[Touch-packages] [Bug 1633619] Re: dhclient -1 exits 0 when no lease found

[Touch-packages] [Bug 1633619] Re: dhclient -1 exits 0 when no lease found

[Touch-packages] [Bug 1633619] Re: dhclient -1 exits 0 when no lease found

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