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// SPDX-License-Identifier: GPL-3.0-or-later
package pika
import (
"context"
_ "embed"
"errors"
"time"
"github.com/netdata/netdata/go/go.d.plugin/agent/module"
"github.com/netdata/netdata/go/go.d.plugin/pkg/tlscfg"
"github.com/netdata/netdata/go/go.d.plugin/pkg/web"
"github.com/blang/semver/v4"
"github.com/go-redis/redis/v8"
)
//go:embed "config_schema.json"
var configSchema string
func init() {
module.Register("pika", module.Creator{
JobConfigSchema: configSchema,
Create: func() module.Module { return New() },
})
}
func New() *Pika {
return &Pika{
Config: Config{
Address: "redis://@localhost:9221",
Timeout: web.Duration(time.Second),
},
collectedCommands: make(map[string]bool),
collectedDbs: make(map[string]bool),
}
}
type Config struct {
tlscfg.TLSConfig `yaml:",inline" json:""`
UpdateEvery int `yaml:"update_every" json:"update_every"`
Address string `yaml:"address" json:"address"`
Timeout web.Duration `yaml:"timeout" json:"timeout"`
}
type (
Pika struct {
module.Base
Config `yaml:",inline" json:""`
charts *module.Charts
pdb redisClient
server string
version *semver.Version
collectedCommands map[string]bool
collectedDbs map[string]bool
}
redisClient interface {
Info(ctx context.Context, section ...string) *redis.StringCmd
Close() error
}
)
func (p *Pika) Configuration() any {
return p.Config
}
func (p *Pika) Init() error {
err := p.validateConfig()
if err != nil {
p.Errorf("config validation: %v", err)
return err
}
pdb, err := p.initRedisClient()
if err != nil {
p.Errorf("init redis client: %v", err)
return err
}
p.pdb = pdb
charts, err := p.initCharts()
if err != nil {
p.Errorf("init charts: %v", err)
return err
}
p.charts = charts
return nil
}
func (p *Pika) 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 *Pika) Charts() *module.Charts {
return p.charts
}
func (p *Pika) Collect() map[string]int64 {
ms, err := p.collect()
if err != nil {
p.Error(err)
}
if len(ms) == 0 {
return nil
}
return ms
}
func (p *Pika) Cleanup() {
if p.pdb == nil {
return
}
err := p.pdb.Close()
if err != nil {
p.Warningf("cleanup: error on closing redis client [%s]: %v", p.Address, err)
}
p.pdb = nil
}
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