src/go/plugin/go.d/modules/lighttpd/lighttpd.go
// SPDX-License-Identifier: GPL-3.0-or-later
package lighttpd
import (
_ "embed"
"errors"
"fmt"
"net/http"
"strings"
"time"
"github.com/netdata/netdata/go/plugins/plugin/go.d/agent/module"
"github.com/netdata/netdata/go/plugins/plugin/go.d/pkg/confopt"
"github.com/netdata/netdata/go/plugins/plugin/go.d/pkg/web"
)
//go:embed "config_schema.json"
var configSchema string
func init() {
module.Register("lighttpd", module.Creator{
JobConfigSchema: configSchema,
Create: func() module.Module { return New() },
Config: func() any { return &Config{} },
})
}
func New() *Lighttpd {
return &Lighttpd{Config: Config{
HTTPConfig: web.HTTPConfig{
RequestConfig: web.RequestConfig{
URL: "http://127.0.0.1/server-status?auto",
},
ClientConfig: web.ClientConfig{
Timeout: confopt.Duration(time.Second * 2),
},
},
},
charts: charts.Copy(),
}
}
type Config struct {
UpdateEvery int `yaml:"update_every,omitempty" json:"update_every"`
web.HTTPConfig `yaml:",inline" json:""`
}
type Lighttpd struct {
module.Base
Config `yaml:",inline" json:""`
charts *module.Charts
httpClient *http.Client
}
func (l *Lighttpd) Configuration() any {
return l.Config
}
func (l *Lighttpd) Init() error {
if l.URL == "" {
return errors.New("URL is required but not set")
}
if !strings.HasSuffix(l.URL, "?auto") {
return fmt.Errorf("bad URL '%s', should ends in '?auto'", l.URL)
}
httpClient, err := web.NewHTTPClient(l.ClientConfig)
if err != nil {
return fmt.Errorf("failed to create http client: %v", err)
}
l.httpClient = httpClient
l.Debugf("using URL %s", l.URL)
l.Debugf("using timeout: %s", l.Timeout.Duration())
return nil
}
func (l *Lighttpd) Check() error {
mx, err := l.collect()
if err != nil {
return err
}
if len(mx) == 0 {
return errors.New("no metrics collected")
}
return nil
}
func (l *Lighttpd) Charts() *Charts {
return l.charts
}
func (l *Lighttpd) Collect() map[string]int64 {
mx, err := l.collect()
if err != nil {
l.Error(err)
return nil
}
return mx
}
func (l *Lighttpd) Cleanup() {
if l.httpClient != nil {
l.httpClient.CloseIdleConnections()
}
}