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Limit database connections (#980, #564) (#998)

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* Limit database connections (#564)

- Add new options to the config file database:
      max_open_conns: 100
      max_idle_conns: 2
      conn_max_lifetime: -1
- Implement connection parameter setup on the *DB (database/sql) in internal/sqlutil/trace.go:Open()
- Propagate the values in the form of DbProperties interface via all the
  Open() and NewDatabase() functions

Signed-off-by: Tomas Jirka <tomas.jirka@email.cz>

* Fix wasm builds

* Remove file accidentally added from working tree

Co-authored-by: Tomas Jirka <tomas.jirka@email.cz>
This commit is contained in:
Neil Alexander 2020-05-01 13:34:53 +01:00 • committed by GitHub
parent 908108c23e
commit f7cfa75886
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51 changed files with 213 additions and 88 deletions
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21
internal/sqlutil/trace.go
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@ -21,9 +21,11 @@ import (
"fmt"
"io"
"os"
"regexp"
"strings"
"time"
"github.com/matrix-org/dendrite/common"
"github.com/ngrok/sqlmw"
"github.com/sirupsen/logrus"
)
@ -76,12 +78,27 @@ func (in *traceInterceptor) RowsNext(c context.Context, rows driver.Rows, dest [
// Open opens a database specified by its database driver name and a driver-specific data source name,
// usually consisting of at least a database name and connection information. Includes tracing driver
// if DENDRITE_TRACE_SQL=1
func Open(driverName, dsn string) (*sql.DB, error) {
func Open(driverName, dsn string, dbProperties common.DbProperties) (*sql.DB, error) {
if tracingEnabled {
// install the wrapped driver
driverName += "-trace"
}
return sql.Open(driverName, dsn)
db, err := sql.Open(driverName, dsn)
if err != nil {
return nil, err
}
if driverName != common.SQLiteDriverName() && dbProperties != nil {
logrus.WithFields(logrus.Fields{
"MaxOpenConns": dbProperties.MaxOpenConns(),
"MaxIdleConns": dbProperties.MaxIdleConns(),
"ConnMaxLifetime": dbProperties.ConnMaxLifetime(),
"dataSourceName": regexp.MustCompile(`://[^@]*@`).ReplaceAllLiteralString(dsn, "://"),
}).Debug("Setting DB connection limits")
db.SetMaxOpenConns(dbProperties.MaxOpenConns())
db.SetMaxIdleConns(dbProperties.MaxIdleConns())
db.SetConnMaxLifetime(dbProperties.ConnMaxLifetime())
}
return db, nil
}
func init() {