feat: connect to fail2ban db and extract total bad ips
Add dependencies on `sqlite` to allow connecting to the fail2ban database. Add a new `db` module to handle all the database connections and data queries used to generate metrics. Export a new metric for the total number of bad IPs stored in the fail2ban database.
This commit is contained in:
parent
e2661bf243
commit
0b40e5de82
50
db/db.go
Normal file
50
db/db.go
Normal file
@ -0,0 +1,50 @@
|
||||
package db
|
||||
|
||||
import (
|
||||
"database/sql"
|
||||
"log"
|
||||
"strconv"
|
||||
)
|
||||
|
||||
const queryCountTotalBadIps = "SELECT COUNT(1) FROM bips"
|
||||
|
||||
type Fail2BanDB struct {
|
||||
DatabasePath string
|
||||
sqliteDB *sql.DB
|
||||
}
|
||||
|
||||
func MustConnectToDb(databasePath string) *Fail2BanDB {
|
||||
db, err := sql.Open("sqlite3", databasePath)
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
return &Fail2BanDB{
|
||||
DatabasePath: databasePath,
|
||||
sqliteDB: db,
|
||||
}
|
||||
}
|
||||
|
||||
func (db *Fail2BanDB) CountTotalBadIps() (int, error) {
|
||||
stmt, err := db.sqliteDB.Prepare(queryCountTotalBadIps)
|
||||
defer db.mustCloseStatement(stmt)
|
||||
|
||||
if err != nil {
|
||||
return -1, err
|
||||
}
|
||||
|
||||
result := ""
|
||||
err = stmt.QueryRow().Scan(&result)
|
||||
|
||||
if err != nil {
|
||||
return -1, err
|
||||
}
|
||||
|
||||
return strconv.Atoi(result)
|
||||
}
|
||||
|
||||
func (db *Fail2BanDB) mustCloseStatement(stmt *sql.Stmt) {
|
||||
err := stmt.Close()
|
||||
if err != nil {
|
||||
log.Fatal(err)
|
||||
}
|
||||
}
|
32
exporter.go
32
exporter.go
@ -1,6 +1,8 @@
|
||||
package main
|
||||
|
||||
import (
|
||||
fail2banDb "fail2ban-prometheus-exporter/db"
|
||||
_ "github.com/mattn/go-sqlite3"
|
||||
"github.com/prometheus/client_golang/prometheus"
|
||||
"github.com/prometheus/client_golang/prometheus/promhttp"
|
||||
"log"
|
||||
@ -9,23 +11,41 @@ import (
|
||||
|
||||
const namespace = "fail2ban"
|
||||
|
||||
var up = prometheus.NewDesc(
|
||||
prometheus.BuildFQName(namespace, "", "up"),
|
||||
"Was the last fail2ban query successful.",
|
||||
nil, nil,
|
||||
var (
|
||||
db = fail2banDb.MustConnectToDb("fail2ban.sqlite3")
|
||||
metricUp = prometheus.NewDesc(
|
||||
prometheus.BuildFQName(namespace, "", "up"),
|
||||
"Was the last fail2ban query successful.",
|
||||
nil, nil,
|
||||
)
|
||||
metricBadIpTotal = prometheus.NewDesc(
|
||||
prometheus.BuildFQName(namespace, "", "badip_total"),
|
||||
"Total number of bad IPs stored in the database.",
|
||||
nil, nil,
|
||||
)
|
||||
)
|
||||
|
||||
type Exporter struct {
|
||||
}
|
||||
|
||||
func (e *Exporter) Describe(ch chan<- *prometheus.Desc) {
|
||||
ch <- up
|
||||
ch <- metricUp
|
||||
ch <- metricBadIpTotal
|
||||
}
|
||||
|
||||
func (e *Exporter) Collect(ch chan<- prometheus.Metric) {
|
||||
ch <- prometheus.MustNewConstMetric(
|
||||
up, prometheus.GaugeValue, 1,
|
||||
metricUp, prometheus.GaugeValue, 1,
|
||||
)
|
||||
ch <- *collectTotalBadIpMetric()
|
||||
}
|
||||
|
||||
func collectTotalBadIpMetric() *prometheus.Metric {
|
||||
count, _ := db.CountTotalBadIps()
|
||||
metric := prometheus.MustNewConstMetric(
|
||||
metricBadIpTotal, prometheus.GaugeValue, float64(count),
|
||||
)
|
||||
return &metric
|
||||
}
|
||||
|
||||
func main() {
|
||||
|
5
go.mod
5
go.mod
@ -2,4 +2,7 @@ module fail2ban-prometheus-exporter
|
||||
|
||||
go 1.15
|
||||
|
||||
require github.com/prometheus/client_golang v1.9.0
|
||||
require (
|
||||
github.com/mattn/go-sqlite3 v1.14.6
|
||||
github.com/prometheus/client_golang v1.9.0
|
||||
)
|
||||
|
2
go.sum
2
go.sum
@ -150,6 +150,8 @@ github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaO
|
||||
github.com/mattn/go-isatty v0.0.3/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNxMWT7Zi4=
|
||||
github.com/mattn/go-isatty v0.0.4/go.mod h1:M+lRXTBqGeGNdLjl/ufCoiOlB5xdOkqRJdNxMWT7Zi4=
|
||||
github.com/mattn/go-runewidth v0.0.2/go.mod h1:LwmH8dsx7+W8Uxz3IHJYH5QSwggIsqBzpuz5H//U1FU=
|
||||
github.com/mattn/go-sqlite3 v1.14.6 h1:dNPt6NO46WmLVt2DLNpwczCmdV5boIZ6g/tlDrlRUbg=
|
||||
github.com/mattn/go-sqlite3 v1.14.6/go.mod h1:NyWgC/yNuGj7Q9rpYnZvas74GogHl5/Z4A/KQRfk6bU=
|
||||
github.com/matttproud/golang_protobuf_extensions v1.0.1 h1:4hp9jkHxhMHkqkrB3Ix0jegS5sx/RkqARlsWZ6pIwiU=
|
||||
github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
|
||||
github.com/miekg/dns v1.0.14/go.mod h1:W1PPwlIAgtquWBMBEV9nkV9Cazfe8ScdGz/Lj7v3Nrg=
|
||||
|
Loading…
Reference in New Issue
Block a user