James Page Hacluster

Learn about configurations >

• cluster_count | int

  Default: 3

  Number of peer units required to bootstrap cluster services. . If less that 3 is specified, the cluster will be configured to ignore any quorum problems; with 3 or more units, quorum will be enforced and services will be stopped in the event of a loss of quorum. It is best practice to set this value to the expected number of units to avoid potential race conditions.

• corosync_bindiface | string

  Default network interface on which HA cluster will bind to communication with the other members of the HA Cluster. Defaults to the network interface hosting the units private-address. Only used when corosync_transport = multicast.

• corosync_key | string

  Default: 64RxJNcCkwo8EJYBsaacitUvbQp5AW4YolJi5/2urYZYp2jfLxY+3IUCOaAUJHPle4Yqfy+WBXO0I/6ASSAjj9jaiHVNaxmVhhjcmyBqy2vtPf+m+0VxVjUXlkTyYsODwobeDdO3SIkbIABGfjLTu29yqPTsfbvSYr6skRb9ne0=

  This value will become the Corosync authentication key. To generate a suitable value use: . sudo corosync-keygen sudo cat /etc/corosync/authkey | base64 -w 0 . This configuration element is mandatory and the service will fail on install if it is not provided. The value must be base64 encoded.

• corosync_mcastaddr | string

  Default: 226.94.1.1

  Multicast IP address to use for exchanging messages over the network. If multiple clusters are on the same bindnetaddr network, this value can be changed. Only used when corosync_transport = multicast.

• corosync_mcastport | int

  Default multicast port number that will be used to communicate between HA Cluster nodes. Only used when corosync_transport = multicast.

• corosync_transport | string

  Default: unicast

  Two supported modes are multicast (udp) or unicast (udpu)

• debug | boolean

  Enable debug logging

• maas_credentials | string

  MAAS credentials (required for STONITH).

• maas_source | string

  Default: ppa:maas/stable

  PPA for python3-maas-client: . - ppa:maas/stable - ppa:maas/next . The last option should be used in conjunction with the key configuration option. Used when service_dns is set on the primary charm for DNS HA.

• maas_url | string

  MAAS API endpoint (required for STONITH).

• maintenance-mode | boolean

  When enabled pacemaker will be put in maintenance mode, this will allow administrators to manipulate cluster resources (e.g. stop daemons, reboot machines, etc). Pacemaker will not monitor the resources while maintence mode is enabled.

• monitor_host | string

  One or more IPs, separated by space, that will be used as a safety check for avoiding split brain situations. Nodes in the cluster will ping these IPs periodically. Node that can not ping monitor_host will not run shared resources (VIP, shared disk...).

• monitor_interval | string

  Default: 5s

  Time period between checks of resource health. It consists of a number and a time factor, e.g. 5s = 5 seconds. 2m = 2 minutes.

• 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-postgresql-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.

• netmtu | int

  Specifies the corosync.conf network mtu. If unset, the default corosync.conf value is used (currently 1500). See 'man corosync.conf' for detailed information on this config option.

• 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.

• service_start_timeout | int

  Default: 180

  Systemd override value for corosync and pacemaker service start timeout in seconds. Set value to -1 turn off timeout for the services.

• service_stop_timeout | int

  Default: 60

  Systemd override value for corosync and pacemaker service stop timeout seconds. Set value to -1 turn off timeout for the services.

• stonith_enabled | string

  Default: False

  Enable resource fencing (aka STONITH) for every node in the cluster. This requires MAAS credentials be provided and each node's power parameters are properly configured in its inventory.