access-network | string

The IP address and netmask of the 'access' network (e.g. 192.168.0.0/24) . This network will be used for access to database services.

binlogs-expire-days | int

Default: 10

Sets the expire_logs_days mysql configuration option, which will make mysql server automatically remove logs older than configured number of days.

binlogs-max-size | string

Default: 100M

Sets the max_binlog_size mysql configuration option, which will limit the size of the binary log files. The server will automatically rotate binlgos after they grow to be bigger than this value. Keep in mind that transactions are never split between binary logs, so therefore binary logs might get larger than configured value.

binlogs-path | string

Default: /var/log/mysql/mysql-bin.log

Location on the filesystem where binlogs are going to be placed. Default mimics what mysql-common package would do for mysql. Make sure you do not put binlogs inside mysql datadir (/var/lib/mysql/)!

cluster-network | string

The IP address and netmask of the cluster (replication) network (e.g. 192.168.0.0/24) . This network will be used for wsrep_cluster replication.

dataset-size | string

(DEPRECATED - use innodb-buffer-pool-size) How much data should be kept in memory in the DB. This will be used to tune settings in the database server appropriately. Supported suffixes include K/M/G/T. If suffixed with %, one will get that percentage of RAM allocated to the dataset.

dns-ha | boolean

Use DNS HA with MAAS 2.0. Note if this is set do not set vip settings below.

enable-binlogs | boolean

Turns on MySQL binary logs. The placement of the logs is controlled with the binlogs_path config option.

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: 5490

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

harden | string

Apply system hardening. Supports a space-delimited list of modules to run. Supported modules currently include os, ssh, apache and mysql.

innodb-buffer-pool-size | string

By default this value will be set according to 50% of system total memory but also can be set to any specific value for the system. Supported suffixes include K/M/G/T. If suffixed with %, one will get that percentage of system total memory allocated.

innodb-file-per-table | boolean

Default: True

Turns on innodb_file_per_table option, which will make MySQL put each InnoDB table into separate .idb file. Existing InnoDB tables will remain in ibdata1 file - full dump/import is needed to get rid of large ibdata1 file

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.

lp1366997-workaround | boolean

Adds two config options (wsrep_drupal_282555_workaround and wsrep_retry_autocommit) as a workaround for Percona Primary Key bug (see LP 1366997).

max-connections | int

Default: -1

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

min-cluster-size | int

Minimum number of units expected to exist before charm will attempt to bootstrap percona cluster. If no value is provided this setting is ignored.

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.

nagios_servicegroups | string

A comma-separated list of nagios servicegroups. If left empty, the nagios_context will be used as the servicegroup.

os-access-hostname | string

The hostname or address of the access endpoint for percona-cluster.

pause | boolean

This is used to make sure that juju doesn't run config hook.

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.

root-password | string

Root password for MySQL access; must be configured pre-deployment for Active-Active clusters.

source | string

Package install location for Percona XtraDB Cluster (defaults to distro for >= 14.04)

sst-method | string

Default: xtrabackup-v2

Percona method for taking the State Snapshot Transfer (SST), can be: 'rsync', 'xtrabackup', 'xtrabackup-v2', 'mysqldump', 'skip' - see https://www.percona.com/doc/percona-xtradb-cluster/5.5/wsrep-system-index.html#wsrep_sst_method

sst-password | string

Re-sync account password for new cluster nodes; must be configured pre-deployment for Active-Active clusters.

table-open-cache | int

Default: 2048

Sets table_open_cache (formerly known as table_cache) to mysql.

vip | string

Virtual IP to use to front Percona XtraDB Cluster in active/active HA configuration

vip_cidr | int

Default: 24

Netmask that will be used for the Virtual IP.

vip_iface | string

Default: eth0

Network interface on which 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.

Sunny Verma Percona Cluster