Clarify dns-ha and access binding usage as implemented
Change-Id: I699611b529f3cddc9d76028219f913ec1391d6f5 Partial-Bug: #1759356 Related-Bug: #1756988
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README.md
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README.md
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@ -119,12 +119,15 @@ environments. MAAS 2.0 requires Juju 2.0 or greater. The clustered nodes must
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have static or "reserved" IP addresses registered in MAAS. The DNS hostname(s)
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must be pre-registered in MAAS before use with DNS HA.
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At a minimum, the config option 'dns-ha' must be set to true and
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'os-access-hostname' must be set in order to use DNS HA.
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At a minimum, the config option 'dns-ha' must be set to true, the
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'os-access-hostname' must be set, and the 'access' binding must be
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defined in order to use DNS HA.
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The charm will throw an exception in the following circumstances:
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If neither 'vip' nor 'dns-ha' is set and the charm is related to hacluster
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If both 'vip' and 'dns-ha' are set as they are mutually exclusive
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If 'dns-ha' is set and os-access-hostname is not set
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If both 'vip' and 'dns-ha' are set, as they are mutually exclusive
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If 'dns-ha' is set and 'os-access-hostname' is not set
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If the 'access' binding is not set and 'dns-ha' is set, consumers of the db may not be allowed to connect
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Network Space support
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---------------------
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@ -156,7 +159,7 @@ MySQL databases services from other charms.
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**NOTE:** Existing deployments using the access-network configuration option will continue to function; this option is preferred over any network space binding provided for the 'shared-db' relation if set.
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Limitiations
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Limitations
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============
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Note that Percona XtraDB Cluster is not a 'scale-out' MySQL solution; reads
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