97 lines
2.2 KiB
Go
97 lines
2.2 KiB
Go
/*
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Copyright 2019 Adrien Waksberg
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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https://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package main
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import (
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"fmt"
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"flag"
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"os"
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"os/exec"
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"strings"
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"time"
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)
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// Option to parse
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var (
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HELP = flag.Bool("help", false, "print the help message")
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SERVICE = flag.String("service", "", "service name")
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LIFETIME = flag.Int("lifetime", 60, "minimum life time in second")
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)
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func init() {
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flag.Parse()
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if *HELP {
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flag.PrintDefaults()
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os.Exit(3)
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}
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if *SERVICE == "" {
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Critical("Please set service name")
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}
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}
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// Critical print a message and exit with code 2
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func Critical(msg string) {
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fmt.Println(fmt.Sprintf("CRITICAL - %s", msg))
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os.Exit(2)
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}
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// Warning print a message and exit with code 1
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func Warning(msg string) {
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fmt.Println(fmt.Sprintf("WARNING - %s", msg))
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os.Exit(1)
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}
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// Ok print a message and exit with code 0
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func Ok(msg string) {
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fmt.Println(fmt.Sprintf("OK - %s", msg))
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os.Exit(0)
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}
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// ServiceStatus check if the service is started
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func ServiceStatus() error {
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cmd := exec.Command("systemctl", "is-active", *SERVICE)
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if err := cmd.Run(); err != nil {
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return fmt.Errorf("the service is inactive")
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}
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output, err := exec.Command("systemctl", "show", *SERVICE, "-p", "ExecMainStartTimestamp", "--value").Output()
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if err != nil {
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return err
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}
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startDate, err := time.Parse("Mon 2006-01-02 15:04:05 MST", strings.Trim(string(output), "\n"))
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if err != nil {
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return err
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}
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if startDate.Unix() > time.Now().Add(- time.Duration(*LIFETIME) * time.Second).Unix() {
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return fmt.Errorf("the service has started for less than %d seconds", *LIFETIME)
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}
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return nil
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}
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func main() {
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err := ServiceStatus()
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if err != nil {
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Critical(fmt.Sprintf("%v", err))
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}
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Ok("the service is active")
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}
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