In postgres, you can specify an `idle_session_timeout` which will close
sessions idling for that amount of time. If a session is closed because
of a timeout, PgCat will erroneously mark the server as unhealthy as the next
health check will return an error because the connection was drop, if no
health check is to be executed, it will simply fail trying to send the query
to the server for the same reason, the conn was drop.
Given that bb8 allows configuring an idle_timeout for pools, it would be
nice to allow setting this parameter in the config file, this way you can
set it to something shorter than the server one. Also, server pool will be kept
smaller in moments of less traffic. Actually, currently this value is set as its
default in bb8, which is 10 minutes.
This changes allows setting the parameter using the config file. It can be set both
globally and per pool. When creating the pool, if the pool don't have it defined, global
value is used.
Moves config validation to own functions to enable tools to use them
Moves sharding config to enum
Makes defaults public
Make connect_timeout on pool and option which is overwritten by general connect_timeout
* Changes shard struct to use vector of ServerConfig
* Adds to query router
* Change client disconnect with error message to warn instead of debug
* Add warning logs for clean up actions
* wip
* revert some'
* revert more
* poor-man's integration test
* remove test
* fmt
* --workspace
* fix build
* fix integration test
* another stab
* log
* run after integration
* cargo test after integration
* revert
* revert more
* Refactor + clean up
* more clean up
* initial commit of server check delay implementation
* fmt
* spelling
* Update name to last_healthcheck and some comments
* Moved server tested stat to after require_healthcheck check
* Make health check delay configurable
* Rename to last_activity
* Fix typo
* Add debug log for healthcheck
* Add address to debug log
* Add support for multi-database / multi-user pools
* Nothing
* cargo fmt
* CI
* remove test users
* rename pool
* Update tests to use admin user/pass
* more fixes
* Revert bad change
* Use PGDATABASE env var
* send server info in case of admin
* Support reloading the entire config (including sharding logic) without restart.
* Fix bug incorrectly handing error reporting when the shard is set incorrectly via SET SHARD TO command.
selected wrong shard and the connection keep reporting fatal #80.
* Fix total_received and avg_recv admin database statistics.
* Enabling the query parser by default.
* More tests.
* Refactor query routing into its own module
* commments; tests; dead code
* error message
* safer startup
* hm
* dont have to be public
* wow
* fix ci
* ok
* nl
* no more silent errors
* constants
* server.rs docs
* client.rs comments
* dead code; comments
* comment
* query cancellation comments
* remove unnecessary cast
* move db setup up one step
* query cancellation test
* new line; good night
