Crash on startup with "ValueError: IP sequence must contain at least 2 elements" when dynamic range is incorrect

[Nguyen Anh Tuan]

Contenet of /var/log/maas/regiond.log

2015-09-21 22:22:03 [maasserver.start_up] ERROR: Error during start-up.
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/maasserver/start_up.py", line 84, in start_up
    yield deferToThread(inner_start_up)
ValueError: IP sequence must contain at least 2 elements!
2015-09-21 22:22:04 [HTTPChannel,0,127.0.0.1] 127.0.0.1 - - [22/Sep/2015:02:22:04 +0000] "GET /MAAS/rpc/ HTTP/1.1" 503 164 "-" "provisioningserver.rpc.clusterservice.ClusterClientService"
2015-09-21 22:22:06 [maasserver.start_up] ERROR: Error during start-up.
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/maasserver/start_up.py", line 84, in start_up
    yield deferToThread(inner_start_up)
ValueError: IP sequence must contain at least 2 elements!
2015-09-21 22:22:06 [HTTPChannel,0,127.0.0.1] 127.0.0.1 - - [22/Sep/2015:02:22:06 +0000] "GET /MAAS/rpc/ HTTP/1.1" 503 164 "-" "provisioningserver.rpc.clusterservice.ClusterClientService"
2015-09-21 22:22:08 [HTTPChannel,0,127.0.0.1] 127.0.0.1 - - [22/Sep/2015:02:22:08 +0000] "GET /MAAS/rpc/ HTTP/1.1" 503 164 "-" "provisioningserver.rpc.clusterservice.ClusterClientService"
2015-09-21 22:22:09 [maasserver.start_up] ERROR: Error during start-up.
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/maasserver/start_up.py", line 84, in start_up
    yield deferToThread(inner_start_up)
ValueError: IP sequence must contain at least 2 elements!
2015-09-21 22:22:10 [HTTPChannel,0,127.0.0.1] 127.0.0.1 - - [22/Sep/2015:02:22:10 +0000] "GET /MAAS/rpc/ HTTP/1.1" 503 164 "-" "provisioningserver.rpc.clusterservice.ClusterClientService"
2015-09-21 22:22:12 [HTTPChannel,0,127.0.0.1] 127.0.0.1 - - [22/Sep/2015:02:22:12 +0000] "GET /MAAS/rpc/ HTTP/1.1" 503 164 "-" "provisioningserver.rpc.clusterservice.ClusterClientService"
2015-09-21 22:22:12 [maasserver.start_up] ERROR: Error during start-up.
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/maasserver/start_up.py", line 84, in start_up
    yield deferToThread(inner_start_up)
ValueError: IP sequence must contain at least 2 elements!
2015-09-21 22:22:14 [HTTPChannel,0,127.0.0.1] 127.0.0.1 - - [22/Sep/2015:02:22:14 +0000] "GET /MAAS/rpc/ HTTP/1.1" 503 164 "-" "provisioningserver.rpc.clusterservice.ClusterClientService"
2015-09-21 22:22:15 [maasserver.start_up] ERROR: Error during start-up.
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/maasserver/start_up.py", line 84, in start_up
    yield deferToThread(inner_start_up)
ValueError: IP sequence must contain at least 2 elements!
2015-09-21 22:22:16 [HTTPChannel,0,127.0.0.1] 127.0.0.1 - - [22/Sep/2015:02:22:16 +0000] "GET /MAAS/rpc/ HTTP/1.1" 503 164 "-" "provisioningserver.rpc.clusterservice.ClusterClientService"
2015-09-21 22:22:18 [HTTPChannel,1,127.0.0.1] 127.0.0.1 - - [22/Sep/2015:02:22:18 +0000] "GET /MAAS/rpc/ HTTP/1.1" 503 164 "-" "provisioningserver.rpc.clusterservice.ClusterClientService"
2015-09-21 22:22:18 [maasserver.start_up] ERROR: Error during start-up.
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/maasserver/start_up.py", line 84, in start_up
    yield deferToThread(inner_start_up)
ValueError: IP sequence must contain at least 2 elements!

[Nguyen Anh Tuan (kevin-nguyen-eng)]

I can't find relation between this to my configuration

I'also try

 $ sudo dpkg-reconfigure maas-region-controller
 $ sudo dpkg-reconfigure maas-cluster-controller
 $ sudo reboot

but erro still apear

2015-09-21 22:36:24 [maasserver.start_up] ERROR: Error during start-up.
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/maasserver/start_up.py", line 84, in start_up
    yield deferToThread(inner_start_up)
ValueError: IP sequence must contain at least 2 elements!
2015-09-21 22:36:25 [HTTPChannel,0,127.0.0.1] 127.0.0.1 - - [22/Sep/2015:02:36:25 +0000] "GET /MAAS/rpc/ HTTP/1.1" 503 164 "-" "provisioningserver.rpc.clusterservice.ClusterClientService"

[Mike Pontillo (mpontillo)]

Thank you for taking the time to report a bug in MAAS.

Before we can begin to troubleshoot the problem, could you please let us know the following information:

 - Which version of MAAS are you running? (apt-cache policy maas)
 - Which version of Ubuntu are you running? (lsb_release -a
 - Was this MAAS installation installed and configured already, or was it a new install?

I looked into the error that was thrown. The function spanning_cidr() netaddr.ip can throw this error. In the current trunk, we call this in get_details_for_ip_range() in zoneconfg.py (under provisioningserver.dns). This function is called when we generate forward and reverse DNS zones; the input to this function seems to be the dynamic ranges for each managed NodeGroupInterface.

Therefore, it would be helpful to run "sudo maas-region-admin dbshell" and then "select * from maasserver_nodegroupinterface;". This could tell us if it's possible that an invalid dynamic range is causing this problem.

[Nguyen Anh Tuan (kevin-nguyen-eng)]

Hello Mike

I send back information about this as below

 - Which version of MAAS are you running? (apt-cache policy maas)
maas:
  Installed: 1.8.0+bzr4001-0ubuntu2~trusty1
  Candidate: 1.8.0+bzr4001-0ubuntu2~trusty1
  Version table:
 *** 1.8.0+bzr4001-0ubuntu2~trusty1 0
        500 http://ppa.launchpad.net/maas-maintainers/stable/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status
     1.7.6+bzr3376-0ubuntu2~14.04.1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
     1.5.4+bzr2294-0ubuntu1.2 0
        500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
     1.5+bzr2252-0ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages

 - Which version of Ubuntu are you running? (lsb_release -a)
            # lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description: Ubuntu 14.04.3 LTS
  Release: 14.04
  Codename: trusty
- Was this MAAS installation installed and configured already, or was it a new install?
            # This MAAS installation was installed and configured then running OK - but when using after change attribute in CLUSTER section , and after maintaince boot system maas cannot startup again and cause this error in log

I upload the db table maasserver_nodegroupinterface

/# sudo maas-region-admin dbshell
psql (9.3.9)
Type "help" for help.

maasdb=# select * from maasserver_nodegroupinterface;
 id | created | updated | ip | nodegroup_id | management | interface | subnet_mask | broadcast_ip | router_ip | ip_range_low | ip_range_high | foreign_dhcp_ip | static_ip_range_low | static_ip_range_high | name
----+-------------------------------+-------------------------------+---------------+--------------+------------+-----------+-----------------+---------------+---------------+---------------+---------------+-----------------+---------------------+----------------------+------
  2 | 2015-09-14 13:48:59.339395-04 | 2015-09-19 00:52:05.629086-04 | 42.116.255.36 | 1 | 2 | eth1 | 255.255.255.240 | 42.116.255.47 | 42.116.255.33 | 42.116.255.39 | 42.116.255.39 | | 42.116.255.40 | 42.116.255.45 | eth1
  1 | 2015-09-14 13:48:59.339395-04 | 2015-09-21 13:37:46.164694-04 | 172.27.6.232 | 1 | 1 | eth0 | 255.255.255.240 | 172.27.6.239 | 172.27.6.225 | 172.27.6.233 | 172.27.6.235 | | 172.27.6.237 | 172.27.6.238 | eth0
(2 rows)

[Nguyen Anh Tuan (kevin-nguyen-eng)]

Hello Mike

Thanks for your help , I have just fix this error because I input ip_range_low and ip_high_low the same 42.116.255.39