feature: multiplexing support for database plugins #14033
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* WIP: start from main and get a plugin runner from core * move MultiplexedClient map to plugin catalog - call sys.NewPluginClient from PluginFactory - updates to getPluginClient - thread through isMetadataMode * use go-plugin ClientProtocol interface - call sys.NewPluginClient from dbplugin.NewPluginClient * move PluginSets to dbplugin package - export dbplugin HandshakeConfig - small refactor of PluginCatalog.getPluginClient * add removeMultiplexedClient; clean up on Close() - call client.Kill from plugin catalog - set rpcClient when muxed client exists * add ID to dbplugin.DatabasePluginClient struct * only create one plugin process per plugin type * update NewPluginClient to return connection ID to sdk - wrap grpc.ClientConn so we can inject the ID into context - get ID from context on grpc server * add v6 multiplexing protocol version * WIP: backwards compat for db plugins * Ensure locking on plugin catalog access - Create public GetPluginClient method for plugin catalog - rename postgres db plugin * use the New constructor for db plugins * grpc server: use write lock for Close and rlock for CRUD * cleanup MultiplexedClients on Close * remove TODO * fix multiplexing regression with grpc server connection * cleanup grpc server instances on close * embed ClientProtocol in Multiplexer interface * use PluginClientConfig arg to make NewPluginClient plugin type agnostic * create a new plugin process for non-muxed plugins
* use closure for plugin client cleanup * log and return errors; add comments * move rpcClient wrapping to core for ID injection * refactor core plugin client and sdk * remove unused ID method * refactor and only wrap clientConn on multiplexed plugins * rename structs and do not export types * Slight refactor of system view interface * Revert "Slight refactor of system view interface" This reverts commit 73d420e. * Revert "Revert "Slight refactor of system view interface"" This reverts commit f755270. * only provide pluginRunner arg to the internal newPluginClient method * embed ClientProtocol in pluginClient and name logger * Add back MLock support * remove enableMlock arg from setupPluginCatalog * rename plugin util interface to PluginClient Co-authored-by: Brian Kassouf <bkassouf@hashicorp.com>
* fix grpc_server tests and add coverage * update run_config tests * add happy path test case for grpc_server ID from context * update test helpers
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fairclothjm
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Feb 14, 2022
Co-authored-by: Brian Kassouf <briankassouf@users.noreply.github.com>
fairclothjm
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Feb 15, 2022
calvn
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Feb 15, 2022
calvn
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Feb 16, 2022
jasonodonnell
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Feb 16, 2022
calvn
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Feb 16, 2022
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Description
This PR adds multiplexing support for database plugins.
When multiplexed database plugins are configured in Vault, each plugin will only have a single process managing all connections configured. This single process, per database plugin, will be multiplexed across all Vault namespaces for mounts of this type.
To test multiplexing