src/go/plugin/go.d/modules/fail2ban/fail2ban.go
// SPDX-License-Identifier: GPL-3.0-or-later
package fail2ban
import (
_ "embed"
"errors"
"time"
"github.com/netdata/netdata/go/plugins/plugin/go.d/agent/module"
"github.com/netdata/netdata/go/plugins/plugin/go.d/pkg/confopt"
)
//go:embed "config_schema.json"
var configSchema string
func init() {
module.Register("fail2ban", module.Creator{
JobConfigSchema: configSchema,
Defaults: module.Defaults{
UpdateEvery: 10,
},
Create: func() module.Module { return New() },
Config: func() any { return &Config{} },
})
}
func New() *Fail2Ban {
return &Fail2Ban{
Config: Config{
Timeout: confopt.Duration(time.Second * 2),
},
charts: &module.Charts{},
discoverEvery: time.Minute * 5,
seenJails: make(map[string]bool),
}
}
type Config struct {
UpdateEvery int `yaml:"update_every,omitempty" json:"update_every"`
Timeout confopt.Duration `yaml:"timeout,omitempty" json:"timeout"`
}
type (
Fail2Ban struct {
module.Base
Config `yaml:",inline" json:""`
charts *module.Charts
exec fail2banClientCli
discoverEvery time.Duration
lastDiscoverTime time.Time
forceDiscover bool
jails []string
seenJails map[string]bool
}
fail2banClientCli interface {
status() ([]byte, error)
jailStatus(s string) ([]byte, error)
}
)
func (f *Fail2Ban) Configuration() any {
return f.Config
}
func (f *Fail2Ban) Init() error {
f2bClientExec, err := f.initFail2banClientCliExec()
if err != nil {
f.Errorf("fail2ban-client exec initialization: %v", err)
return err
}
f.exec = f2bClientExec
return nil
}
func (f *Fail2Ban) Check() error {
mx, err := f.collect()
if err != nil {
f.Error(err)
return err
}
if len(mx) == 0 {
return errors.New("no metrics collected")
}
return nil
}
func (f *Fail2Ban) Charts() *module.Charts {
return f.charts
}
func (f *Fail2Ban) Collect() map[string]int64 {
mx, err := f.collect()
if err != nil {
f.Error(err)
}
if len(mx) == 0 {
return nil
}
return mx
}
func (f *Fail2Ban) Cleanup() {}