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====== |
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Galera |
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====== |
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===== |
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Usage |
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===== |
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Galera Cluster for MySQL is a true Multimaster Cluster based on synchronous replication. Galera Cluster is an easy-to-use, high-availability solution, which provides high system uptime, no data loss and scalability for future growth. |
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Galera Cluster for MySQL is a true Multimaster Cluster based on synchronous |
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replication. Galera Cluster is an easy-to-use, high-availability solution, |
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which provides high system uptime, no data loss and scalability for future |
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growth. |
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Sample pillars |
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============== |
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@@ -136,16 +139,23 @@ Additional check params: |
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Configurable soft parameters |
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============================ |
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- **galera_innodb_buffer_pool_size** - the default value is 3138M |
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- **galera_max_connections** - the default value is 20000 |
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- **galera_innodb_read_io_threads** - the default value is 8 |
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- **galera_innodb_write_io_threads** - the default value is 8 |
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- **galera_wsrep_slave_threads** - the default value is 8 |
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- **galera_xtrabackup_parallel** - the default value is 4 |
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- **galera_error_log_enabled** - the default value is 'false' |
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- ``galera_innodb_buffer_pool_size`` |
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Default is ``3138M`` |
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- ``galera_max_connections`` |
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Default is ``20000`` |
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- ``galera_innodb_read_io_threads`` |
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Default is ``8`` |
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- ``galera_innodb_write_io_threads`` |
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Default is ``8`` |
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- ``galera_wsrep_slave_threads`` |
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Default is ``8`` |
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- ``galera_xtrabackup_parallel`` |
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Default is 4 |
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- ``galera_error_log_enabled`` |
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Default is ``false`` |
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Usage: |
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.. code-block:: yaml |
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_param: |
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@@ -157,7 +167,6 @@ Usage: |
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galera_xtrabackup_parallel: 2 |
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galera_error_log_enabled: true |
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Usage |
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===== |
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@@ -175,12 +184,12 @@ Galera monitoring command, performed from extra server |
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garbd -a gcomm://ipaddrofone:4567 -g my_wsrep_cluster -l /tmp/1.out -d |
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1. salt-call state.sls mysql |
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2. Comment everything starting wsrep* (wsrep_provider, wsrep_cluster, wsrep_sst) |
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3. service mysql start |
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4. run on each node mysql_secure_install and filling root password. |
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#. salt-call state.sls mysql |
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#. Comment everything starting wsrep* (wsrep_provider, wsrep_cluster, wsrep_sst) |
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#. service mysql start |
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#. run on each node mysql_secure_install and filling root password. |
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.. code-block:: bash |
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.. code-block:: bash |
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Enter current password for root (enter for none): |
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OK, successfully used password, moving on... |
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@@ -228,16 +237,18 @@ Galera monitoring command, performed from extra server |
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Cleaning up... |
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5. service mysql stop |
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6. uncomment all wsrep* lines except first server, where leave only in my.cnf wsrep_cluster_address='gcomm://'; |
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7. start first node |
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8. Start third node which is connected to first one |
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9. Start second node which is connected to third one |
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10. After starting cluster, it must be change cluster address at first starting node without restart database and change config my.cnf. |
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#. service mysql stop |
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#. uncomment all wsrep* lines except first server, where leave only in |
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my.cnf wsrep_cluster_address='gcomm://'; |
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#. start first node |
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#. Start third node which is connected to first one |
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#. Start second node which is connected to third one |
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#. After starting cluster, it must be change cluster address at first starting node |
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without restart database and change config my.cnf. |
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.. code-block:: bash |
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.. code-block:: bash |
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mysql> SET GLOBAL wsrep_cluster_address='gcomm://10.0.0.2'; |
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mysql> SET GLOBAL wsrep_cluster_address='gcomm://10.0.0.2'; |
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Read more |
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========= |
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@@ -246,37 +257,31 @@ Read more |
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* http://www.sebastien-han.fr/blog/2012/04/15/active-passive-failover-cluster-on-a-mysql-galera-cluster-with-haproxy-lsb-agent/ |
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* http://opentodo.net/2012/12/mysql-multi-master-replication-with-galera/ |
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* http://www.codership.com/wiki/doku.php |
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* Best one: - http://www.sebastien-han.fr/blog/2012/04/01/mysql-multi-master-replication-with-galera/ |
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* http://www.sebastien-han.fr/blog/2012/04/01/mysql-multi-master-replication-with-galera/ |
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Documentation and Bugs |
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Documentation and bugs |
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====================== |
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To learn how to install and update salt-formulas, consult the documentation |
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available online at: |
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http://salt-formulas.readthedocs.io/ |
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In the unfortunate event that bugs are discovered, they should be reported to |
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the appropriate issue tracker. Use Github issue tracker for specific salt |
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formula: |
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https://github.com/salt-formulas/salt-formula-galera/issues |
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For feature requests, bug reports or blueprints affecting entire ecosystem, |
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use Launchpad salt-formulas project: |
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https://launchpad.net/salt-formulas |
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* http://salt-formulas.readthedocs.io/ |
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Learn how to install and update salt-formulas |
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You can also join salt-formulas-users team and subscribe to mailing list: |
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* https://github.com/salt-formulas/salt-formula-galera/issues |
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In the unfortunate event that bugs are discovered, report the issue to the |
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appropriate issue tracker. Use the Github issue tracker for a specific salt |
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formula |
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https://launchpad.net/~salt-formulas-users |
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* https://launchpad.net/salt-formulas |
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For feature requests, bug reports, or blueprints affecting the entire |
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ecosystem, use the Launchpad salt-formulas project |
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Developers wishing to work on the salt-formulas projects should always base |
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their work on master branch and submit pull request against specific formula. |
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* https://launchpad.net/~salt-formulas-users |
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Join the salt-formulas-users team and subscribe to mailing list if required |
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https://github.com/salt-formulas/salt-formula-galera |
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* https://github.com/salt-formulas/salt-formula-galera |
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Develop the salt-formulas projects in the master branch and then submit pull |
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requests against a specific formula |
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Any questions or feedback is always welcome so feel free to join our IRC |
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channel: |
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* #salt-formulas @ irc.freenode.net |
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Use this IRC channel in case of any questions or feedback which is always |
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welcome |
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#salt-formulas @ irc.freenode.net |