Troubleshooting
===============

Errors when starting introspection
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

* *Invalid provision state "available"*

  In Kilo release with *python-ironicclient* 0.5.0 or newer Ironic
  defaults to reporting provision state ``AVAILABLE`` for newly enrolled
  nodes.  **ironic-inspector** will refuse to conduct introspection in
  this state, as such nodes are supposed to be used by Nova for scheduling.
  See :ref:`node_states` for instructions on how to put nodes into
  the correct state.

Introspection times out
~~~~~~~~~~~~~~~~~~~~~~~

There may be 3 reasons why introspection can time out after some time
(defaulting to 60 minutes, altered by ``timeout`` configuration option):

#. Fatal failure in processing chain before node was found in the local cache.
   See `Troubleshooting data processing`_ for the hints.

#. Failure to load the ramdisk on the target node. See `Troubleshooting
   PXE boot`_ for the hints.

#. Failure during ramdisk run. See `Troubleshooting ramdisk run`_ for the
   hints.

Troubleshooting data processing
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
In this case **ironic-inspector** logs should give a good idea what went wrong.
E.g. for RDO or Fedora the following command will output the full log::

    sudo journalctl -u openstack-ironic-inspector

(use ``openstack-ironic-discoverd`` for version < 2.0.0).

.. note::
    Service name and specific command might be different for other Linux
    distributions (and for old version of **ironic-inspector**).

If ``ramdisk_error`` plugin is enabled and ``ramdisk_logs_dir`` configuration
option is set, **ironic-inspector** will store logs received from the ramdisk
to the ``ramdisk_logs_dir`` directory. This depends, however, on the ramdisk
implementation.

Troubleshooting PXE boot
^^^^^^^^^^^^^^^^^^^^^^^^

PXE booting most often becomes a problem for bare metal environments with
several physical networks. If the hardware vendor provides a remote console
(e.g. iDRAC for DELL), use it to connect to the machine and see what is going
on. You may need to restart introspection.

Another source of information is DHCP and TFTP server logs. Their location
depends on how the servers were installed and run. For RDO or Fedora use::

    $ sudo journalctl -u openstack-ironic-inspector-dnsmasq

(use ``openstack-ironic-discoverd-dnsmasq`` for version < 2.0.0).

The last resort is ``tcpdump`` utility. Use something like
::

    $ sudo tcpdump -i any port 67 or port 68 or port 69

to watch both DHCP and TFTP traffic going through your machine. Replace
``any`` with a specific network interface to check that DHCP and TFTP
requests really reach it.

If you see node not attempting PXE boot or attempting PXE boot on the wrong
network, reboot the machine into BIOS settings and make sure that only one
relevant NIC is allowed to PXE boot.

If you see node attempting PXE boot using the correct NIC but failing, make
sure that:

#. network switches configuration does not prevent PXE boot requests from
   propagating,

#. there is no additional firewall rules preventing access to port 67 on the
   machine where *ironic-inspector* and its DHCP server are installed.

If you see node receiving DHCP address and then failing to get kernel and/or
ramdisk or to boot them, make sure that:

#. TFTP server is running and accessible (use ``tftp`` utility to verify),

#. no firewall rules prevent access to TFTP port,

#. DHCP server is correctly set to point to the TFTP server,

#. ``pxelinux.cfg/default`` within TFTP root contains correct reference to the
   kernel and ramdisk.

Troubleshooting ramdisk run
^^^^^^^^^^^^^^^^^^^^^^^^^^^

Connect to the remote console as described in `Troubleshooting PXE boot`_ to
see what is going on with the ramdisk. The ramdisk drops into emergency shell
on failure, which you can use to look around. There should be file called
``logs`` with the current ramdisk logs.

Troubleshooting DNS issues on Ubuntu
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Ubuntu uses local DNS caching, so tries localhost for DNS results first
before calling out to an external DNS server. When DNSmasq is installed and
configured for use with ironic-inspector, it can cause problems by interfering
with the local DNS cache. To fix this issue ensure that ``/etc/resolve.conf``
points to your external DNS servers and not to ``127.0.0.1``.
