func Example() {
check := nagiosplugin.NewCheck()
// Make sure the check always (as much as possible) exits with
// the correct output and return code if we terminate unexpectedly.
defer check.Finish()
// (If the check panicked on the next line, it'd exit with a
// default UNKNOWN result.)
//
// Our check is testing the internal consistency of the
// universe.
value := math.Pi
// We add a dimensionless metric with a minimum of zero, an
// unbounded maximum, a warning threshold of 4000.0 and a
// critical threshold of 9000.0 (for graphing purposes).
check.AddPerfDatum("badness", "", value, 0.0, math.Inf(1), 4000.0, 9000.0)
// Add an OK check result as the universe appears sane.
check.AddResult(nagiosplugin.OK, "Everything looks shiny from here, cap'n")
// We potentially perform more checks and add more results here;
// if there's more than one, the highest result will be the one
// returned (in ascending order OK, WARNING, CRITICAL, UNKNOWN).
// This will print:
// OK: Everything looks shiny from here, cap'n | badness=3.141592653589793;4000;9000;0;
}
func main() {
flag.Parse()
start := time.Now()
u, err := url.Parse(fmt.Sprintf("http://%s:%d", *host, *port))
if err != nil {
log.Fatal(err)
}
conf := client.Config{
URL: *u,
Username: *user,
Password: *password,
Timeout: time.Duration(*timeout) * time.Millisecond,
}
check := nagiosplugin.NewCheck()
defer check.Finish()
con, err := client.NewClient(conf)
if err != nil {
check.AddResult(nagiosplugin.UNKNOWN, "Can't connect to database")
log.Fatal(err)
}
q := client.Query{
Command: *query,
Database: *db,
}
if response, err := con.Query(q); err == nil {
if response.Error() != nil {
check.AddResult(nagiosplugin.UNKNOWN, "Can't execute query")
log.Fatal(err)
}
result, err := (response.Results[0].Series[0].Values[0][1].(json.Number)).Float64()
duration := time.Since(start)
if err != nil {
check.AddResult(nagiosplugin.UNKNOWN, "Error parsing result")
}
message := fmt.Sprintf("Got %v in %v", result, duration)
check.AddPerfDatum("value", "", result)
if *warning != "" {
warnRange, err := nagiosplugin.ParseRange(*warning)
if err != nil {
check.AddResult(nagiosplugin.UNKNOWN, "Error parsing warning range")
}
if warnRange.Check(result) {
check.AddResult(nagiosplugin.WARNING, message)
}
}
if *critical != "" {
criticalRange, err := nagiosplugin.ParseRange(*critical)
if err != nil {
check.AddResult(nagiosplugin.UNKNOWN, "Error parsing critical range")
}
if criticalRange.Check(result) {
check.AddResult(nagiosplugin.CRITICAL, message)
}
}
check.AddResult(nagiosplugin.OK, message)
}
}