chore: gdb regions - #1266
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| def prepare_conn_props(self, props: Properties): | ||
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| def filter_available_hosts( |
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Similar comment to my previous review: I'm curious about the best location for this logic - seems to be quite a bit of duplicated logic around filtering available hosts
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Co-authored-by: Sophia Chu <112967780+sophia-bq@users.noreply.github.com>
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Summary
gdb_accessible_regions)monitoring_connection_priority,gdb_monitoring_connection_priority)Description
GdbFailoverPlugin— failover candidates are filtered by accessible regions. In strict-writer mode, failover fails fast if the writer is in a non-accessible region.GdbReadWriteSplittingPlugin— writer connections to non-accessible regions are rejected. Reader candidates are filtered before applying home-region restrictions.GlobalAuroraTopologyMonitor— topology monitoring host workers skip non-accessible regions. The initial host's region is validated and the monitor fails fast if it is not accessible. When the writer is unreachable, the monitor exits panic mode by adopting harvested reader connections (stable-reader-topology consensus).AuroraInitialConnectionStrategyPlugin— host candidates are filtered by accessible regions before strategy-based selection. Filtering is delegated to the dialect viaDatabaseDialect.filter_available_hosts(hosts, accessible_regions), which is a no-op for non-Global dialects and an actual region filter forGlobalAuroraMysqlDialectandGlobalAuroraPgDialect.Both
GdbFailoverPluginandGdbReadWriteSplittingPluginvalidate at initialization that the configured home region is included in the accessible regions list when both are specified.New configuration parameter
monitoring_connection_priorityComma-separated ordered list of priorities for the topology monitoring connection:
strict-writer,strict-reader,writer-or-reader. Default isstrict-writer. The monitor accepts any connection initially and asynchronously upgrades to a higher-priority host without blocking the monitoring loop.New configuration parameter
gdb_monitoring_connection_priorityGDB-specific extension supporting region-aware values:
strict-writer-primary,strict-reader-primary,strict-reader-secondary,strict-writer-<region>,strict-reader-<region>, and plain<region>(any host in that region). Default isstrict-writer-primary.By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.