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package main
import (
"bytes"
"flag"
"fmt"
"gopkg.in/yaml.v3"
"os"
"time"
"riedstra.dev/go/checkup"
)
type Config struct {
RocketChatURL string `yaml:"RocketChatURL"`
DiscordURL string `yaml:"DiscordURL"`
DefaultCertPort string `yaml:"DefaultCertPort"`
CertWindow int `yaml:"CertWindow"`
CheckCerts map[string]*string `yaml:"CheckCerts"`
ExpectedStatusCode int `yaml:"ExpectedStatusCode"`
StatusChecks map[string]*int `yaml:"StatusChecks"`
}
func ReadConfig(fn string) (*Config, error) {
fh, err := os.Open(fn)
if err != nil {
return nil, err
}
dec := yaml.NewDecoder(fh)
conf := &Config{}
err = dec.Decode(conf)
return conf, err
}
func notify(conf *Config, b []byte) {
if len(b) >= 1 {
if conf.RocketChatURL != "" {
err := checkup.SendRocketChatAlert(conf.RocketChatURL, string(b))
if err != nil {
fmt.Fprintln(os.Stderr, string(b))
fmt.Fprintf(os.Stderr,
"When sending webhook for rocketchat: %s\n", err)
}
}
if conf.DiscordURL != "" {
err := checkup.SendDiscordAlert(conf.DiscordURL, string(b))
if err != nil {
fmt.Fprintln(os.Stderr, string(b))
fmt.Fprintf(os.Stderr,
"When sending webhook for discord: %s\n", err)
}
}
}
}
func checkCerts(conf *Config) {
msg := &bytes.Buffer{}
for host, port := range conf.CheckCerts {
if port == nil {
port = &conf.DefaultCertPort
}
conn, err := checkup.CertExpiresSoon(
host,
*port,
time.Duration(conf.CertWindow)*time.Hour*24)
if err != nil {
fmt.Fprintf(msg, "%s:%s --> %s\n", host, *port, err)
continue
}
conn.Close()
}
notify(conf, msg.Bytes())
}
func checkStatus(conf *Config) {
msg := &bytes.Buffer{}
for url, code := range conf.StatusChecks {
if code == nil {
code = &conf.ExpectedStatusCode
}
err := checkup.HttpStatusOK(url, *code)
if err != nil {
fmt.Fprintf(msg, "Checking: %s, %v\n",
url, err)
}
}
notify(conf, msg.Bytes())
}
func main() {
fl := flag.NewFlagSet("checkup", flag.ExitOnError)
confFn := fl.String("c", "config.yml", "Configuration file path")
_ = fl.Parse(os.Args[1:])
conf, err := ReadConfig(*confFn)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
checkCerts(conf)
checkStatus(conf)
}
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