06708191d6
This commit does the following: - sets all shell prompts in code-blocks to the root prompt - uses shell-session code-block since the shell prompt was being treated as a comment - links configure-aodh.rst in configure.rst (running tox was complaining that this file wasn't being linked anywhere) - other minor cleanup Change-Id: I9e3ac8bb0cabd1cc17952cfd765dbb0d8f7b6fa2
1.3 KiB
1.3 KiB
Home OpenStack-Ansible Installation Guide
Removing nodes
In the following example, all but one node was shut down gracefully:
# 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' (2)
node2_galera_container-49a47d25 | FAILED | rc=1 >>
ERROR 2002 (HY000): Can't connect to local MySQL server
through socket '/var/run/mysqld/mysqld.sock' (2)
node4_galera_container-76275635 | success | rc=0 >>
Variable_name Value
wsrep_cluster_conf_id 7
wsrep_cluster_size 1
wsrep_cluster_state_uuid 338b06b0-2948-11e4-9d06-bef42f6c52f1
wsrep_cluster_status PrimaryCompare this example output with the output from the multi-node failure scenario where the remaining operational node is non-primary and stops processing SQL requests. Gracefully shutting down the MariaDB service on all but one node allows the remaining operational node to continue processing SQL requests. When gracefully shutting down multiple nodes, perform the actions sequentially to retain operation.