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// SPDX-License-Identifier: GPL-3.0-or-later
package redis
import (
"context"
_ "embed"
"errors"
"sync"
"time"
"github.com/netdata/netdata/go/go.d.plugin/agent/module"
"github.com/netdata/netdata/go/go.d.plugin/pkg/metrics"
"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("redis", module.Creator{
Create: func() module.Module { return New() },
JobConfigSchema: configSchema,
})
}
func New() *Redis {
return &Redis{
Config: Config{
Address: "redis://@localhost:6379",
Timeout: web.Duration(time.Second),
PingSamples: 5,
},
addAOFChartsOnce: &sync.Once{},
addReplSlaveChartsOnce: &sync.Once{},
pingSummary: metrics.NewSummary(),
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"`
Username string `yaml:"username" json:"username"`
Password string `yaml:"password" json:"password"`
PingSamples int `yaml:"ping_samples" json:"ping_samples"`
}
type (
Redis struct {
module.Base
Config `yaml:",inline" json:""`
charts *module.Charts
addAOFChartsOnce *sync.Once
addReplSlaveChartsOnce *sync.Once
rdb redisClient
server string
version *semver.Version
pingSummary metrics.Summary
collectedCommands map[string]bool
collectedDbs map[string]bool
}
redisClient interface {
Info(ctx context.Context, section ...string) *redis.StringCmd
Ping(context.Context) *redis.StatusCmd
Close() error
}
)
func (r *Redis) Configuration() any {
return r.Config
}
func (r *Redis) Init() error {
err := r.validateConfig()
if err != nil {
r.Errorf("config validation: %v", err)
return err
}
rdb, err := r.initRedisClient()
if err != nil {
r.Errorf("init redis client: %v", err)
return err
}
r.rdb = rdb
charts, err := r.initCharts()
if err != nil {
r.Errorf("init charts: %v", err)
return err
}
r.charts = charts
return nil
}
func (r *Redis) Check() error {
mx, err := r.collect()
if err != nil {
r.Error(err)
return err
}
if len(mx) == 0 {
return errors.New("no metrics collected")
}
return nil
}
func (r *Redis) Charts() *module.Charts {
return r.charts
}
func (r *Redis) Collect() map[string]int64 {
ms, err := r.collect()
if err != nil {
r.Error(err)
}
if len(ms) == 0 {
return nil
}
return ms
}
func (r *Redis) Cleanup() {
if r.rdb == nil {
return
}
err := r.rdb.Close()
if err != nil {
r.Warningf("cleanup: error on closing redis client [%s]: %v", r.Address, err)
}
r.rdb = nil
}
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