From 40d270e0912df91bcde61480a0839e26d3fe117f Mon Sep 17 00:00:00 2001 From: Glenn Vriesman Date: Tue, 2 Jun 2020 02:57:46 +0200 Subject: [PATCH] feat: implemented prometheus exporter Signed-off-by: Glenn Vriesman --- go.mod | 1 + go.sum | 97 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ main.go | 47 +++++++++++++++++++++++++--- 3 files changed, 141 insertions(+), 4 deletions(-) diff --git a/go.mod b/go.mod index 5a38fc2..44f06b3 100644 --- a/go.mod +++ b/go.mod @@ -5,4 +5,5 @@ go 1.14 require ( github.com/alicebob/sqlittle v1.4.1-0.20200506090143-e4b415246cd8 github.com/mmcloughlin/geohash v0.9.0 + github.com/prometheus/client_golang v1.6.0 ) diff --git a/go.sum b/go.sum index 2c8c542..6484697 100644 --- a/go.sum +++ b/go.sum @@ -1,33 +1,130 @@ github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo= +github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod 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h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM= gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo= +gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw= gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v2 v2.2.5 h1:ymVxjfMaHvXD8RqPRmzHHsB3VvucivSkIAvJFDI5O3c= +gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= diff --git a/main.go b/main.go index 6f97c97..2dbfc17 100644 --- a/main.go +++ b/main.go @@ -2,10 +2,14 @@ package main import ( "log" + "net/http" + "strconv" "time" "github.com/alicebob/sqlittle" "github.com/glvr182/f2b-exporter/provider" + "github.com/prometheus/client_golang/prometheus" + "github.com/prometheus/client_golang/prometheus/promhttp" ) // prisoner is an ip that has been (temp) banned by f2b @@ -26,25 +30,60 @@ type prisoner struct { currentlyBanned bool } +var ( + geocount = prometheus.NewGaugeVec( + prometheus.GaugeOpts{ + Name: "f2b_banned_ip", + Help: "Number of banned IPs per country / region", + }, + []string{"country", "geohash", "jail", "currently_banned"}, + ) +) + +func init() { + prometheus.MustRegister(geocount) +} + func main() { log.Println("Starting exporter") + go func() { + for { + time.Sleep(time.Minute) + if err := update(); err != nil { + log.Fatal(err) + } + } + }() + + http.Handle("/metrics", promhttp.Handler()) + if err := http.ListenAndServe(":8080", nil); err != nil { + log.Fatal(err) + } +} + +func update() error { db, err := sqlittle.Open("/var/lib/fail2ban/fail2ban.sqlite3") if err != nil { - panic(err) + return err } defer db.Close() provider, err := provider.New("freeGeoIP") if err != nil { - panic(err) + return err } prisoners, err := jailed(db, provider) if err != nil { - panic(err) + return err + } + + geocount.Reset() + for _, prisoner := range prisoners { + geocount.With(prometheus.Labels{"country": prisoner.country, "geohash": prisoner.geohash, "jail": prisoner.jail, "currently_banned": strconv.FormatBool(prisoner.currentlyBanned)}).Inc() } - log.Printf("%v", prisoners) + return nil } func jailed(db *sqlittle.DB, provider provider.Provider) ([]prisoner, error) {