77 lines
2.0 KiB
Go
77 lines
2.0 KiB
Go
package f2b
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import (
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"log"
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"os"
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"git.cryptic.systems/volker.raschek/prometheus-fail2ban-exporter/cfg"
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"git.cryptic.systems/volker.raschek/prometheus-fail2ban-exporter/socket"
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"github.com/prometheus/client_golang/prometheus"
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)
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type Collector struct {
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socketPath string
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exporterVersion string
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lastError error
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socketConnectionErrorCount int
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socketRequestErrorCount int
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exitOnSocketConnError bool
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}
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func NewExporter(appSettings *cfg.AppSettings, exporterVersion string) *Collector {
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log.Printf("reading fail2ban metrics from socket file: %s", appSettings.Fail2BanSocketPath)
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printFail2BanServerVersion(appSettings.Fail2BanSocketPath)
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return &Collector{
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socketPath: appSettings.Fail2BanSocketPath,
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exporterVersion: exporterVersion,
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lastError: nil,
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socketConnectionErrorCount: 0,
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socketRequestErrorCount: 0,
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exitOnSocketConnError: appSettings.ExitOnSocketConnError,
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}
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}
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func (c *Collector) Describe(ch chan<- *prometheus.Desc) {
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ch <- metricServerUp
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ch <- metricJailCount
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ch <- metricJailFailedCurrent
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ch <- metricJailFailedTotal
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ch <- metricJailBannedCurrent
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ch <- metricJailBannedTotal
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ch <- metricErrorCount
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}
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func (c *Collector) Collect(ch chan<- prometheus.Metric) {
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s, err := socket.ConnectToSocket(c.socketPath)
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if err != nil {
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log.Printf("error opening socket: %v", err)
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c.socketConnectionErrorCount++
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if c.exitOnSocketConnError {
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os.Exit(1)
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}
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} else {
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defer s.Close()
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}
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c.collectServerUpMetric(ch, s)
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if err == nil && s != nil {
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c.collectJailMetrics(ch, s)
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c.collectVersionMetric(ch, s)
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}
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c.collectErrorCountMetric(ch)
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}
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func printFail2BanServerVersion(socketPath string) {
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s, err := socket.ConnectToSocket(socketPath)
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if err != nil {
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log.Printf("error connecting to socket: %v", err)
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} else {
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version, err := s.GetServerVersion()
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if err != nil {
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log.Printf("error interacting with socket: %v", err)
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} else {
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log.Printf("successfully connected to fail2ban socket! fail2ban version: %s", version)
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}
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}
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}
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