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Error suppression #41749

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w3bservice opened this issue Oct 2, 2020 · 3 comments
Closed

Error suppression #41749

w3bservice opened this issue Oct 2, 2020 · 3 comments
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@w3bservice
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w3bservice commented Oct 2, 2020 •
edited

Hello,
how to suppress the error output and output an "exit status 0"?
im new on golang...

What version of Go are you using (go version)?

$ go version
go version go1.15.2 linux/amd64

Does this issue reproduce with the latest release?

What operating system and processor architecture are you using (go env)?

go env Output
$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/joerg/.cache/go-build"
GOENV="/home/joerg/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/home/joerg/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/joerg/go"
GOPRIVATE=""
GOPROXY="direct"
GOROOT="/usr/lib/golang"
GOSUMDB="off"
GOTMPDIR=""
GOTOOLDIR="/usr/lib/golang/pkg/tool/linux_amd64"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build861249311=/tmp/go-build -gno-record-gcc-switches"

What did you do?

package main
import (
	"os"
	"strings"
        "strconv"
	"net/http"
	"bytes"
	"time"
)
func main() {
	var res int
	if strings.EqualFold(os.Getenv("DUPLICATI__PARSED_RESULT"),"Success")  {
	  res = 1
	} else {
	  res = 0
	}
	data := "backup_result " + strconv.Itoa(res) + "\n"
	body := bytes.NewReader([]byte(data))
	req, err := http.NewRequest("POST", "http://pushgateway.tld:9091/metrics/job/"+os.Getenv("DUPLICATI__backup_name"), body)
	req.Header.Set("Content-Type", "application/octet-stream")
	client := &http.Client{}
	resp,err := client.Do(req)
	defer resp.Body.Close()
	if err != nil {
	}
	func() {
    time.Sleep(120 * time.Second)
    }()
    data2 := "backup_result "  + "\n"
	body2 := bytes.NewReader([]byte(data2))
	req2,err2 := http.NewRequest("DELETE", "http://pushgateway.tld:9091/metrics/job/"+os.Getenv("DUPLICATI__backup_name"), body2)
        req2.Header.Set("Content-Type", "application/octet-stream")
	client2 := &http.Client{}
	resp2,err2 := client2.Do(req2)
	defer resp2.Body.Close()
	if err2 != nil {
	}
}

I am working on a solution to monitor our backups, with Duplicati, via Grafana. Duplicate sends a mail to a pushgateway after the backup is done. With the script below it works so far. If the pushgateway is not reachable, the script aborts with an "exit status 2". This will provoke an error message in Duplicati as a warning. The script should also terminate with an "exit status 0" in case of an error.
How can this be realized?
I hope you can help me
@jaswdr
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jaswdr commented Oct 2, 2020

@w3bservice you can write something like this:

package main

import (
        "fmt"
        "os"
)

func main() {
        fmt.Printf("exit status 0")
        os.Exit(0)
}

@w3bservice
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w3bservice commented Oct 2, 2020 •
edited

panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x40 pc=0x646ff9]

goroutine 1 [running]:
main.main()
/home/joerg/metric5.go:24 +0x359

package main
import (
"os"
"strings"
"strconv"
"net/http"
"bytes"
"time"
"fmt"
)
func main() {
var res int
if strings.EqualFold(os.Getenv("DUPLICATI__PARSED_RESULT"),"Success") {
res = 1
} else {
res = 0
}
data := "backup_result " + strconv.Itoa(res) + "\n"
body := bytes.NewReader([]byte(data))
req, err := http.NewRequest("POST", "http://pushgateway.tld:9091/metrics/job/"+os.Getenv("DUPLICATI__backup_name"), body)
req.Header.Set("Content-Type", "application/octet-stream")
client := &http.Client{}
resp,err := client.Do(req)
defer resp.Body.Close()
if err != nil {
}
fmt.Printf("exit status 0")
os.Exit(0)
func() {
time.Sleep(120 * time.Second)
}()
data2 := "backup_result " + "\n"
body2 := bytes.NewReader([]byte(data2))
req2,err2 := http.NewRequest("DELETE", "http://pushgateway.tld:9091/metrics/job/"+os.Getenv("DUPLICATI__backup_name"), body2)
req2.Header.Set("Content-Type", "application/octet-stream")
client2 := &http.Client{}
resp2,err2 := client2.Do(req2)
defer resp2.Body.Close()
if err2 != nil {
}
}

@ALTree
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ALTree commented Oct 2, 2020

Hi,

the Go project does not use its bug tracker for general discussion or asking questions about the language. The Github bug tracker is only used for tracking bugs and proposals going through the Proposal Process.

Please see the Questions wiki page; it has a list of good places for asking questions. Thanks!

Closing here, since this is not a bug.

@ALTree ALTree closed this as completed Oct 2, 2020
@golang golang locked and limited conversation to collaborators Oct 2, 2021
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@ALTree @jaswdr @gopherbot @w3bservice