Rharding Mysql

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• backup_dir | string

  Default: /var/lib/mysql/backups

  Directory where backups will be stored

• backup_retention_count | int

  Default: 7

  Number of recent backups to retain.

• backup_schedule | string

  Cron schedule used for backups. If empty backups are disabled

• bind-address | string

  Default: 0.0.0.0

  mysql bind host address

• binlog-format | string

  Default: MIXED

  If binlogging is enabled, this is the format that will be used. Ignored when tuning-level == fast.

• block-size | int

  Default: 5

  Default block storage size to create when setting up MySQL block storage. This value should be specified in GB (e.g. 100 not 100GB).

• ceph-osd-replication-count | int

  Default: 3

  This value dictates the number of replicas ceph must make of any object it stores within the mysql rbd pool. Of course, this only applies if using Ceph as a backend store. Note that once the mysql rbd pool has been created, changing this value will not have any effect (although it can be changed in ceph by manually configuring your ceph cluster).

• dataset-size | string

  Default: 80%

  How much data do you want to keep in memory in the DB. This will be used to tune settings in the database server appropriately. Any more specific settings will override these defaults though. This currently sets innodb_buffer_pool_size or key_cache_size depending on the setting in preferred-storage-engine. If query-cache-type is set to 'ON' or 'DEMAND' 20% of this is given to query-cache-size. Suffix this value with 'K','M','G', or 'T' to get the relevant kilo/mega/etc. bytes. If suffixed with %, one will get that percentage of RAM devoted to dataset and (if enabled) query cache.

• flavor | string

  Default: distro

  Possible values are 'distro' or 'percona'

• ha-bindiface | string

  Default: eth0

  Default network interface on which HA cluster will bind to communication with the other members of the HA Cluster.

• ha-mcastport | int

  Default: 5411

  Default multicast port number that will be used to communicate between HA Cluster nodes.

• key | string

  Key ID to import to the apt keyring to support use with arbitary source configuration from outside of Launchpad archives or PPA's.

• max-connections | int

  Default: -1

  Maximum connections to allow. -1 means use the server's compiled in default.

• nagios_context | string

  Default: juju

  Used by the nrpe-external-master subordinate charm. A string that will be prepended to instance name to set the host name in nagios. So for instance the hostname would be something like: juju-myservice-0 If you're running multiple environments with the same services in them this allows you to differentiate between them.

• prefer-ipv6 | boolean

  If True enables IPv6 support. The charm will expect network interfaces to be configured with an IPv6 address. If set to False (default) IPv4 is expected. . NOTE: these charms do not currently support IPv6 privacy extension. In order for this charm to function correctly, the privacy extension must be disabled and a non-temporary address must be configured/available on your network interface.

• preferred-storage-engine | string

  Default: InnoDB

  Tune the server for usage of this storage engine. Other possible value is MyISAM. Comma separated will cause settings to split resources evenly among given engines.

• query-cache-size | int

  Override the computed version from dataset-size. Still works if query-cache-type is "OFF" since sessions can override the cache type setting on their own.

• query-cache-type | string

  Default: OFF

  Query cache is usually a good idea, but can hurt concurrency. Valid values are "OFF", "ON", or "DEMAND". http://dev.mysql.com/doc/refman/5.1/en/server-system-variables.html#sysvar_query_cache_type

• rbd-name | string

  Default: mysql1

  The name that will be used to create the Ceph's RBD image with. If the image name exists in Ceph, it will be re-used and the data will be overwritten.

• source | string

  Optional configuration to support use of additional sources such as: . - ppa:myteam/ppa - cloud:precise-proposed/folsom - http://my.archive.com/ubuntu main . The last option should be used in conjunction with the key configuration option.

• tuning-level | string

  Default: safest

  Valid values are 'safest', 'fast', and 'unsafe'. If set to safest, all settings are tuned to have maximum safety at the cost of performance. Fast will turn off most controls, but may lose data on crashes. unsafe will turn off all protections.

• vip | string

  Virtual IP to use to front mysql in ha configuration

• vip_cidr | int

  Default: 24

  Netmask that will be used for the Virtual IP

• vip_iface | string

  Default: eth0

  Network Interface where to place the Virtual IP

• wait-timeout | int

  Default: -1

  The number of seconds the server waits for activity on a noninteractive connection before closing it. -1 means use the server's compiled in default.