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prometheus.go
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prometheus.go
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/*
* VC5 load balancer. Copyright (C) 2021-present David Coles
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package vc5
import (
"fmt"
"net/netip"
"strings"
"time"
)
func Prometheus(p string, services servicemap, summary Summary, vips map[netip.Addr]state) []string {
r := []string{help(p)}
var defcon uint8
r = append(r, fmt.Sprintf(p+`_uptime %d`, summary.Uptime))
r = append(r, fmt.Sprintf(p+`_defcon %d`, defcon))
r = append(r, fmt.Sprintf(p+`_latency %d`, summary.Latency))
r = append(r, fmt.Sprintf(p+`_sessions %d`, summary.Current))
r = append(r, fmt.Sprintf(p+`_session_total %d`, summary.Flows))
r = append(r, fmt.Sprintf(p+`_rx_packets %d`, summary.IngressPackets))
r = append(r, fmt.Sprintf(p+`_rx_octets %d`, summary.IngressOctets))
r = append(r, fmt.Sprintf(p+`_tx_packets %d`, summary.EgressPackets))
r = append(r, fmt.Sprintf(p+`_tx_octets %d`, summary.EgressOctets))
zeroone := func(u bool) uint8 {
if u {
return 1
}
return 0
}
updown := func(u bool) string {
if u {
return "up"
}
return "down"
}
now := time.Now()
for vip, s := range vips {
r = metric(r, p+`_vip_status{vip="%s"} %d`, vip, zeroone(s.Up()))
r = metric(r, p+`_vip_status_duration{vip="%s",status="%s"} %d`, vip, updown(s.Up()), now.Sub(s.Time())/time.Second)
}
for _, x := range services {
for _, s := range x {
serv := fmt.Sprintf("%s:%s:%d", s.Address, s.Protocol, s.Port)
name := s.Name
stat := s.Stats
up := zeroone(s.Up)
name = strings.ReplaceAll(name, `\`, `\\`)
name = strings.ReplaceAll(name, `"`, `\"`)
r = metric(r, p+`_service_sessions{service="%s",name="%s"} %d`, serv, name, stat.Current)
r = metric(r, p+`_service_sessions_total{service="%s",name="%s"} %d`, serv, name, stat.Flows)
r = metric(r, p+`_service_rx_packets{service="%s",name="%s"} %d`, serv, name, stat.IngressPackets)
r = metric(r, p+`_service_rx_octets{service="%s",name="%s"} %d`, serv, name, stat.IngressOctets)
r = metric(r, p+`_service_tx_packets{service="%s",name="%s"} %d`, serv, name, stat.EgressPackets)
r = metric(r, p+`_service_tx_octets{service="%s",name="%s"} %d`, serv, name, stat.EgressOctets)
r = metric(r, p+`_service_status{service="%s",name="%s"} %d`, serv, name, up)
r = metric(r, p+`_service_status_duration{service="%s",name="%s",status="%s"} %d`, serv, name, updown(s.Up), s.For)
r = metric(r, p+`_service_reserves_used{service="%s",name="%s"} %d`, serv, name, 666)
for _, d := range s.Destinations {
real := fmt.Sprintf("%s:%d", d.Address, d.Port)
stat := d.Stats
up := zeroone(d.Up)
r = metric(r, p+`_backend_sessions{service="%s",name="%s",backend="%s"} %d`, serv, name, real, stat.Current)
r = metric(r, p+`_backend_sessions_total{service="%s",name="%s",backend="%s"} %d`, serv, name, real, stat.Flows)
r = metric(r, p+`_backend_rx_packets{service="%s",name="%s",backend="%s"} %d`, serv, name, real, stat.IngressPackets)
r = metric(r, p+`_backend_rx_octets{service="%s",name="%s",backend="%s"} %d`, serv, name, real, stat.IngressOctets)
r = metric(r, p+`_backend_tx_packets{service="%s",name="%s",backend="%s"} %d`, serv, name, real, stat.EgressPackets)
r = metric(r, p+`_backend_tx_octets{service="%s",name="%s",backend="%s"} %d`, serv, name, real, stat.EgressOctets)
r = metric(r, p+`_backend_status{service="%s",name="%s",backend="%s"} %d`, serv, name, real, up)
r = metric(r, p+`_backend_status_duration{service="%s",name="%s",backend="%s",status="%s"} %d`, serv, name, real, updown(d.Up), d.For)
r = metric(r, p+`_backend_reserves_used{service="%s",name="%s",backend="%s"} %d`, serv, name, real, 666)
}
}
}
//return strings.Join(r, "\n") + "\n"
return r
}
func metric(l []string, f string, a ...any) []string {
return append(l, fmt.Sprintf(f, a...))
}
func help(p string) string {
return `# TYPE ` + p + `_uptime counter
# TYPE ` + p + `_defcon gauge
# TYPE ` + p + `_latency gauge
# TYPE ` + p + `_sessions gauge
# TYPE ` + p + `_session_total counter
# TYPE ` + p + `_rx_packets counter
# TYPE ` + p + `_rx_octets counter
# TYPE ` + p + `_tx_packets counter
# TYPE ` + p + `_tx_octets counter
# TYPE ` + p + `_vip_status gauge
# TYPE ` + p + `_vip_status_duration gauge
# TYPE ` + p + `_service_sessions gauge
# TYPE ` + p + `_service_sessions_total counter
# TYPE ` + p + `_service_rx_packets counter
# TYPE ` + p + `_service_rx_octets counter
# TYPE ` + p + `_service_tx_packets counter
# TYPE ` + p + `_service_tx_octets counter
# TYPE ` + p + `_service_status gauge
# TYPE ` + p + `_service_status_duration gauge
# TYPE ` + p + `_service_reserves_used gauge
# TYPE ` + p + `_backend_sessions gauge
# TYPE ` + p + `_backend_sessions_total counter
# TYPE ` + p + `_backend_rx_packets counter
# TYPE ` + p + `_backend_rx_octets counter
# TYPE ` + p + `_backend_tx_packets counter
# TYPE ` + p + `_backend_tx_octets counter
# TYPE ` + p + `_backend_status gauge
# TYPE ` + p + `_backend_status_duration gauge
# HELP ` + p + `_uptime Uptime in seconds
# HELP ` + p + `_defcon Readiness level
# HELP ` + p + `_latency Average packet processing latency in nanoseconds
# HELP ` + p + `_sessions Estimated number of current active sessions
# HELP ` + p + `_session_total Total number of new sessions written to state tracking table
# HELP ` + p + `_rx_packets Total number of incoming packets
# HELP ` + p + `_rx_octets Total number incoming bytes
# HELP ` + p + `_tx_packets Total number of outgoing packets
# HELP ` + p + `_tx_octets Total number outgoing bytes
# HELP ` + p + `_vip_status gauge
# HELP ` + p + `_vip_status_duration gauge
# HELP ` + p + `_service_sessions gauge
# HELP ` + p + `_service_sessions_total counter
# HELP ` + p + `_service_rx_packets counter
# HELP ` + p + `_service_rx_octets counter
# HELP ` + p + `_service_tx_packets counter
# HELP ` + p + `_service_tx_octets counter
# HELP ` + p + `_service_status gauge
# HELP ` + p + `_service_status_duration gauge
# HELP ` + p + `_service_reserves_used gauge
# HELP ` + p + `_backend_sessions gauge
# HELP ` + p + `_backend_sessions_total counter
# HELP ` + p + `_backend_rx_packets counter
# HELP ` + p + `_backend_rx_octets counter
# HELP ` + p + `_backend_tx_packets counter
# HELP ` + p + `_backend_tx_octets counter
# HELP ` + p + `_backend_status gauge
# HELP ` + p + `_backend_status_duration gauge`
}