130 lines
3.1 KiB
Go
130 lines
3.1 KiB
Go
// Copyright 2023 The Prometheus Authors
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package internal
|
|
|
|
import (
|
|
"flag"
|
|
"fmt"
|
|
"net"
|
|
"os"
|
|
"strings"
|
|
|
|
"gopkg.in/yaml.v2"
|
|
)
|
|
|
|
const WhatsupPort = "99"
|
|
|
|
var (
|
|
WhatsAppFlags = flag.NewFlagSet("whatsapp", flag.ExitOnError)
|
|
|
|
prometheusAddr = WhatsAppFlags.String("prometheus-address", "", "The address of Prometheus to query.")
|
|
traceEndpoint = WhatsAppFlags.String("trace-endpoint", "", "Optional GRPC OTLP endpoint for tracing backend. Set it to 'stdout' to print traces to the output instead.")
|
|
traceSamplingRatio = WhatsAppFlags.Float64("trace-sampling-ratio", 1.0, "Sampling ratio. Currently 1.0 is the best value to use with exemplars.")
|
|
configFile = WhatsAppFlags.String("config-file", "./whatsup.yaml", "YAML configuration with same options as flags here. Flags override the configuration items.")
|
|
)
|
|
|
|
type Config struct {
|
|
PrometheusAddr string `yaml:"PrometheusAddress,omitempty"`
|
|
TraceEndpoint string `yaml:"TraceEndpoint,omitempty"`
|
|
TraceSamplingRatio float64 `yaml:"TraceSamplingRatio,omitempty"`
|
|
}
|
|
|
|
func isWSL() bool {
|
|
b, err := os.ReadFile("/proc/version")
|
|
if err != nil {
|
|
return false
|
|
}
|
|
|
|
if strings.Contains(string(b), "WSL") {
|
|
return true
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
func getInterfaceIpv4Addr(interfaceName string) (addr string, err error) {
|
|
var (
|
|
ief *net.Interface
|
|
addrs []net.Addr
|
|
ipv4Addr net.IP
|
|
)
|
|
|
|
if ief, err = net.InterfaceByName(interfaceName); err != nil {
|
|
return "", err
|
|
}
|
|
|
|
if addrs, err = ief.Addrs(); err != nil {
|
|
return "", err
|
|
}
|
|
|
|
for _, addr := range addrs {
|
|
if ipv4Addr = addr.(*net.IPNet).IP.To4(); ipv4Addr != nil {
|
|
break
|
|
}
|
|
}
|
|
|
|
if ipv4Addr == nil {
|
|
return "", fmt.Errorf("interface %s does not have an ipv4 address", interfaceName)
|
|
}
|
|
|
|
return ipv4Addr.String(), nil
|
|
}
|
|
|
|
func whatsupAddr(defAddress string) string {
|
|
if a := os.Getenv("HOSTADDR"); a != "" {
|
|
return a + ":" + WhatsupPort
|
|
}
|
|
|
|
// use eth0 IP address if running WSL, return default if check fails
|
|
if isWSL() {
|
|
a, err := getInterfaceIpv4Addr("eth0")
|
|
if err != nil {
|
|
return defAddress
|
|
}
|
|
|
|
return a + ":" + WhatsupPort
|
|
}
|
|
|
|
return defAddress
|
|
}
|
|
|
|
func ParseOptions(args []string) (Config, error) {
|
|
c := Config{}
|
|
|
|
if err := WhatsAppFlags.Parse(args); err != nil {
|
|
return c, err
|
|
}
|
|
|
|
if *configFile != "" {
|
|
b, err := os.ReadFile(*configFile)
|
|
if err != nil {
|
|
return c, err
|
|
}
|
|
if err := yaml.Unmarshal(b, &c); err != nil {
|
|
return c, err
|
|
}
|
|
}
|
|
|
|
if *prometheusAddr != "" {
|
|
c.PrometheusAddr = *prometheusAddr
|
|
}
|
|
if *traceEndpoint != "" {
|
|
c.TraceEndpoint = *traceEndpoint
|
|
}
|
|
if *traceSamplingRatio > 0 {
|
|
c.TraceSamplingRatio = *traceSamplingRatio
|
|
}
|
|
return c, nil
|
|
}
|