openstack/trove
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Merge "Add troubleshooting guide"

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Zuul 2020-04-27 01:24:17 +00:00 committed by Gerrit Code Review
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doc/source/admin/index.rst
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building_guest_images
secure_oslo_messaging
database_module_usage
troubleshooting

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doc/source/admin/troubleshooting.rst Normal file
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===============
Troubleshooting
===============
Instance stuck in BUILD status
------------------------------
The possible reasons for this issue:
* Networking issue between message queue service(e.g. RabbitMQ) and Trove guest
instance. When creating a Trove instance, trove-taskmanager sends a message
to the message queue, which is expected to be received and handled by the
trove-guestagent service which is running inside the instance. The instance
status should be updated by trove-guestagent service after handling.
Apparently, If the trove-taskmanager can't connect with RabbitMQ, the
instance status won't be updated.
* Code bug in trove-guestagent. You should be able to see some error log in
trove-guestagent log file (by default,
``/var/log/trove/trove-guestagent.log``).
* If you are using the dev mode image, it's also possible that trove-guestagent
can't connect to Trove controller host to download trove-guestagent service
code, either because of network connectivity issue or the ssh key is missing
or incorrect.
In either case, you will need to ssh into the Trove instance and check the log.
In order to do that, you need to make sure:
* You have the admin credentials to get the IP address of Trove instance
management port. The management port is a Neutron port allocated from the
management network (defined by ``management_networks`` config option). For
example, you need to log into a Trove instance named 'test', and the
management network name is 'trove-mgmt', you can run:
.. code-block:: console
$ openstack server list | grep test | grep trove-mgmt
| 810fc014-bd9f-4464-b506-1b78f37c495e | test | ACTIVE | private=10.1.0.57; trove-mgmt=192.168.254.229 | ubuntu-xenial-mysql-5.7-dev | ds1G |
* The TCP 22 port is allowed in the Neutron security group (defined by
``management_security_groups`` config option) that applied to the management
port.
* You have the SSH private key. The Trove instance should be created using a
Nova keypair defined by ``nova_keypair`` config option.
After log into the instance, you can check the trove-guestagent log by:
.. code-block:: console
sudo journalctl -u trove-guest.service | less # or
sudo vi /var/log/trove/trove-guestagent.log
Please contact Trove team in #openstack-trove IRC channel or send email to
openstack-discuss@lists.openstack.org if help needed.
.. note::
The Trove instance creation time varies in different environments, the
default value of ``usage_timeout`` option (1800 seconds) may not be applied
to all, the cloud administrator should change that based on testing so that
the instance creation should fail in a reasonable timely manner.