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// SPDX-License-Identifier: GPL-3.0-or-later
package pgbouncer
import (
"database/sql"
_ "embed"
"errors"
"time"
"github.com/netdata/netdata/go/go.d.plugin/agent/module"
"github.com/netdata/netdata/go/go.d.plugin/pkg/web"
"github.com/blang/semver/v4"
_ "github.com/jackc/pgx/v4/stdlib"
)
//go:embed "config_schema.json"
var configSchema string
func init() {
module.Register("pgbouncer", module.Creator{
JobConfigSchema: configSchema,
Create: func() module.Module { return New() },
Config: func() any { return &Config{} },
})
}
func New() *PgBouncer {
return &PgBouncer{
Config: Config{
Timeout: web.Duration(time.Second),
DSN: "postgres://postgres:postgres@127.0.0.1:6432/pgbouncer",
},
charts: globalCharts.Copy(),
recheckSettingsEvery: time.Minute * 5,
metrics: &metrics{
dbs: make(map[string]*dbMetrics),
},
}
}
type Config struct {
UpdateEvery int `yaml:"update_every,omitempty" json:"update_every"`
DSN string `yaml:"dsn" json:"dsn"`
Timeout web.Duration `yaml:"timeout,omitempty" json:"timeout"`
}
type PgBouncer struct {
module.Base
Config `yaml:",inline" json:""`
charts *module.Charts
db *sql.DB
version *semver.Version
recheckSettingsTime time.Time
recheckSettingsEvery time.Duration
maxClientConn int64
metrics *metrics
}
func (p *PgBouncer) Configuration() any {
return p.Config
}
func (p *PgBouncer) Init() error {
err := p.validateConfig()
if err != nil {
p.Errorf("config validation: %v", err)
return err
}
return nil
}
func (p *PgBouncer) Check() error {
mx, err := p.collect()
if err != nil {
p.Error(err)
return err
}
if len(mx) == 0 {
return errors.New("no metrics collected")
}
return nil
}
func (p *PgBouncer) Charts() *module.Charts {
return p.charts
}
func (p *PgBouncer) Collect() map[string]int64 {
mx, err := p.collect()
if err != nil {
p.Error(err)
}
if len(mx) == 0 {
return nil
}
return mx
}
func (p *PgBouncer) Cleanup() {
if p.db == nil {
return
}
if err := p.db.Close(); err != nil {
p.Warningf("cleanup: error on closing the PgBouncer database [%s]: %v", p.DSN, err)
}
p.db = nil
}
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