f9f907732e
Convert RPC installation guide from DocBook to RST, remove content specific to Rackspace, and create initial OSAD installation guide. Change-Id: I3eedadc8ba441b4d931720dd6e3f7f3489302a9c Co-Authored-By: Matt Kassawara <mkassawara@gmail.com>
46 lines
1.5 KiB
ReStructuredText
46 lines
1.5 KiB
ReStructuredText
`Home <index.html>`__ OpenStack Ansible Installation Guide
|
|
|
|
Single-node failure
|
|
-------------------
|
|
|
|
If a single node fails, the other nodes maintain quorum and continue to
|
|
process SQL requests.
|
|
|
|
#. Run the following Ansible command to determine the failed node:
|
|
|
|
.. code-block:: bash
|
|
|
|
$ ansible galera_container -m shell -a "mysql -h localhost\
|
|
-e 'show status like \"%wsrep_cluster_%\";'"
|
|
node3_galera_container-3ea2cbd3 | FAILED | rc=1 >>
|
|
ERROR 2002 (HY000): Can't connect to local MySQL server through
|
|
socket '/var/run/mysqld/mysqld.sock' (111)
|
|
|
|
node2_galera_container-49a47d25 | success | rc=0 >>
|
|
Variable_name Value
|
|
wsrep_cluster_conf_id 17
|
|
wsrep_cluster_size 3
|
|
wsrep_cluster_state_uuid 338b06b0-2948-11e4-9d06-bef42f6c52f1
|
|
wsrep_cluster_status Primary
|
|
|
|
node4_galera_container-76275635 | success | rc=0 >>
|
|
Variable_name Value
|
|
wsrep_cluster_conf_id 17
|
|
wsrep_cluster_size 3
|
|
wsrep_cluster_state_uuid 338b06b0-2948-11e4-9d06-bef42f6c52f1
|
|
wsrep_cluster_status Primary
|
|
|
|
|
|
In this example, node 3 has failed.
|
|
|
|
#. Restart MariaDB on the failed node and verify that it rejoins the
|
|
cluster.
|
|
|
|
#. If MariaDB fails to start, run the **mysqld** command and perform
|
|
further analysis on the output. As a last resort, rebuild the
|
|
container for the node.
|
|
|
|
--------------
|
|
|
|
.. include:: navigation.txt
|