Initial import
This commit is contained in:
commit
18e91937cd
4 changed files with 415 additions and 0 deletions
3
go.mod
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3
go.mod
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module bareos-zabbix-check
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go 1.13
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152
main.go
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152
main.go
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package main
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import (
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"flag"
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"fmt"
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"log"
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"os"
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"path"
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"time"
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)
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const (
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bareosWorkDir = "/var/lib/bareos"
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bareosStateFile = "bareos-fd.9102.state"
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baculaWorkDir = "/var/lib/bacula"
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baculaStateFile = "bacula-fd.9102.state"
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spoolFile = "bareos-zabbix-check.spool"
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)
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// We declare globally the variables that will hold the command line arguments
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var (
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verbose bool
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quiet bool
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stateFile string
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workDir string
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)
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func main() {
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var (
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info os.FileInfo
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err error
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successfulJobs jobs
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errorJobs jobs
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spoolJobs jobs
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jobName string
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ts uint64
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now uint64
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errorString string
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missingString string
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)
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// command line arguments parsing
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flag.BoolVar(&verbose, "v", false, "Activates verbose debugging output, defaults to false.")
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flag.BoolVar(&quiet, "q", false, "Suppress all output, suitable to force a silent update of the spool file.")
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flag.StringVar(&stateFile, "f", "", "Force the state file to use, defaults to "+bareosStateFile+" if it exists else "+baculaStateFile+".")
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flag.StringVar(&workDir, "w", "", "Force the work directory to use, defaults to "+bareosWorkDir+" if it exists else "+baculaWorkDir+".")
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flag.Parse()
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// Determine the work directory to use.
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if workDir != "" {
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info, err = os.Stat(workDir)
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if os.IsNotExist(err) || !info.IsDir() {
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fmt.Printf("INFO Invalid work directory %s : it does not exist or is not a directory.\n", workDir)
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os.Exit(0)
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}
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} else {
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workDir = "/var/lib/bareos"
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info, err = os.Stat(workDir)
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if os.IsNotExist(err) || !info.IsDir() {
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workDir = "/var/lib/bacula"
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info, err := os.Stat(workDir)
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if os.IsNotExist(err) || !info.IsDir() {
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fmt.Println("INFO Could not find a suitable work directory. Is bareos or bacula installed?")
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os.Exit(0)
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}
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}
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}
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workDir = path.Clean(workDir)
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if verbose {
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log.Println("Setting work directory to ", workDir)
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}
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// Finds the state file to parse
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if stateFile != "" {
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stateFile = path.Join(workDir, stateFile)
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info, err = os.Stat(stateFile)
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if os.IsNotExist(err) || info.IsDir() {
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fmt.Printf("INFO The state file %s does not exist.\n", stateFile)
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os.Exit(0)
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}
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} else {
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stateFile = path.Join(workDir, bareosStateFile)
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info, err = os.Stat(stateFile)
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if os.IsNotExist(err) || info.IsDir() {
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stateFile = path.Join(workDir, baculaStateFile)
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info, err = os.Stat(stateFile)
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if os.IsNotExist(err) || info.IsDir() {
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fmt.Println("INFO Could not find a suitable state file. Has a job ever run?")
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os.Exit(0)
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}
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}
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}
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if verbose {
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log.Println("Using state file ", stateFile)
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}
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successfulJobs, errorJobs, err = parseStateFile()
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if err != nil {
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fmt.Print(err)
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os.Exit(0)
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}
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// We will check for errors in loading the spool file only if necessary. If all jobs ran successfully without errors in the state file and we manage to write
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// a new spool file without errors, then we will ignore any error here to avoid false positives during backup bootstrap
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spoolJobs, err = loadSpool()
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// if we have jobs in the spool we merge this list with successfull jobs from the state file
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if err == nil {
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for jobName, ts = range spoolJobs {
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var (
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current uint64
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ok bool
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)
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current, ok = successfulJobs[jobName]
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if !ok || current < ts {
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successfulJobs[jobName] = ts
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}
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}
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}
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// we write this new spool
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if err2 := saveSpool(successfulJobs); err2 != nil {
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fmt.Printf("AVERAGE: Couldn't save spool : %s\n", err2)
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os.Exit(0)
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}
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// We build the error string listing the jobs in error
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for jobName, ts = range errorJobs {
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if errorString == "" {
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errorString = fmt.Sprintf("errors: %s", jobName)
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} else {
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errorString = fmt.Sprintf("%s, %s", errorString, jobName)
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}
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}
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now = uint64(time.Now().Unix())
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// Next we check if all jobs ran recently and build the missing string
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for jobName, ts = range successfulJobs {
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if ts < now-24*3600 {
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if missingString == "" {
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missingString = fmt.Sprintf("missing: %s", jobName)
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} else {
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missingString = fmt.Sprintf("%s, %s", missingString, jobName)
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}
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}
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}
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if errorString != "" || missingString != "" {
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fmt.Printf("AVERAGE: %s %s", errorString, missingString)
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if err != nil {
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fmt.Printf(" additionnal errors: %s", err)
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}
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} else {
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fmt.Printf("OK")
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}
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}
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72
spool.go
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72
spool.go
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package main
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import (
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"encoding/csv"
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"fmt"
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"log"
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"os"
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"path"
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"strconv"
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)
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// jobs is a map that matches a job name string to its last successfull run timestamp
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type jobs map[string]uint64
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func loadSpool() (entries jobs, err error) {
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var (
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file *os.File
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lines [][]string
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)
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// We read the spool
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file, err = os.Open(path.Join(workDir, spoolFile))
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if err != nil {
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return nil, fmt.Errorf("INFO Couldn't open spool file: %s", err)
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}
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defer file.Close()
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lines, err = csv.NewReader(file).ReadAll()
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if err != nil {
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return nil, fmt.Errorf("INFO Corrupted spool file : %s", err)
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}
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if verbose {
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log.Printf("Spool file content : %v\n", lines)
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}
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entries = make(map[string]uint64)
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for _, line := range lines {
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var (
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i int
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)
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i, err = strconv.Atoi(line[1])
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if err != nil {
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return nil, fmt.Errorf("INFO Corrupted spool file : couldn't parse timestamp entry")
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}
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entries[line[0]] = uint64(i)
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}
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return
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}
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func saveSpool(entries jobs) (err error) {
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var (
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file *os.File
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lines [][]string
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jobName string
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ts uint64
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i int
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)
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file, err = os.Create(path.Join(workDir, spoolFile))
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if err != nil {
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return fmt.Errorf("INFO Couldn't open spool file for writing : %s", err)
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}
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defer file.Close()
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lines = make([][]string, len(entries))
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i = 0
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for jobName, ts = range entries {
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lines[i] = make([]string, 2)
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lines[i][0] = jobName
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lines[i][1] = fmt.Sprintf("%d", ts)
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i++
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}
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err = csv.NewWriter(file).WriteAll(lines)
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return
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}
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188
state.go
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188
state.go
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package main
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import (
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"bytes"
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"encoding/binary"
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"fmt"
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"log"
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"os"
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"regexp"
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)
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// stateFileHeader : A structure to hold the header of the state file. It is statically aligned for amd64 architecture
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type stateFileHeader struct {
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ID [14]byte
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_ int16
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Version int32
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_ int32
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LastJobsAddr uint64
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EndOfRecentJobResultsList uint64
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Reserved [19]uint64
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}
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func (sfh stateFileHeader) String() string {
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return fmt.Sprintf("ID: \"%s\", Version: %d, LastJobsAddr: %d, EndOfRecentJobResultsList: %d", sfh.ID[:len(sfh.ID)-2], sfh.Version, sfh.EndOfRecentJobResultsList, sfh.Reserved)
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}
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// jobEntry : A structure to hold a job result from the state file
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type jobEntry struct {
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Pad [16]byte
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Errors int32
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JobType int32
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JobStatus int32
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JobLevel int32
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JobID uint32
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VolSessionID uint32
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VolSessionTime uint32
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JobFiles uint32
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JobBytes uint64
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StartTime uint64
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EndTime uint64
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Job [maxNameLength]byte
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}
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func (je jobEntry) String() string {
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var matches = jobNameRegex.FindSubmatchIndex(je.Job[:])
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var jobNameLen int
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if len(matches) >= 4 {
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jobNameLen = matches[3]
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}
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return fmt.Sprintf("Errors: %d, JobType: %c, JobStatus: %c, JobLevel: %c, JobID: %d, VolSessionID: %d, VolSessionTime: %d, JobFiles: %d, JobBytes: %d, StartTime: %d, EndTime: %d, Job: %s",
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je.Errors, je.JobType, je.JobStatus, je.JobLevel, je.JobID, je.VolSessionID, je.VolSessionTime, je.JobFiles, je.JobBytes, je.StartTime, je.EndTime, je.Job[:jobNameLen])
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}
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const (
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// maxNameLength : the maximum length of a string, hard coded in bareos
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maxNameLength = 128
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// stateFileHeaderLength : the length of the state file header struct
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stateFileHeaderLength = 14 + 2 + 4 + 4 + 8 + 8 + 19*8
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// jobResultLength : the length of the job result struct
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jobResultLength = 16 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 4 + 8 + 8 + 8 + maxNameLength
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)
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var jobNameRegex = regexp.MustCompilePOSIX(`^([-A-Za-z0-9_]+)\.[0-9]{4}-[0-9]{2}-[0-9]{2}.*`)
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// readNextBytes : Reads the next "number" bytes from a "file", returns the number of bytes actually read as well as the bytes read
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func readNextBytes(file *os.File, number int) (int, []byte) {
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var bytes = make([]byte, number)
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var n, err = file.Read(bytes)
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if err != nil {
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fmt.Printf("INFO Corrupted state file : file.Read failed in %s : %s\n", stateFile, err)
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}
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return n, bytes
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}
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func parseStateFile() (successfulJobs jobs, errorJobs jobs, err error) {
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var (
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n int
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stateFileHandle *os.File
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data []byte
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buffer *bytes.Buffer
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numberOfJobs uint32
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matches []int
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)
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// Open the state file
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stateFileHandle, err = os.Open(stateFile)
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if err != nil {
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return nil, nil, fmt.Errorf("INFO Couldn't open state file : %s", err)
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}
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defer stateFileHandle.Close()
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// Parsing the state file header
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var header stateFileHeader
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n, data = readNextBytes(stateFileHandle, stateFileHeaderLength)
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if n != stateFileHeaderLength {
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return nil, nil, fmt.Errorf("INFO Corrupted state file : invalid header length in %s", stateFile)
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}
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buffer = bytes.NewBuffer(data)
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err = binary.Read(buffer, binary.LittleEndian, &header)
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if err != nil {
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return nil, nil, fmt.Errorf("INFO Corrupted state file : binary.Read failed on header in %s : %s", stateFile, err)
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}
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if verbose {
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log.Printf("Parsed header: %+s\n", header)
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}
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if id := string(header.ID[:len(header.ID)-1]); id != "Bareos State\n" && id != "Bacula State\n" {
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return nil, nil, fmt.Errorf("INFO Corrupted state file : Not a bareos or bacula state file %s", stateFile)
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}
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if header.Version != 4 {
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return nil, nil, fmt.Errorf("INFO Invalid state file : This script only supports bareos state file version 4, got %d", header.Version)
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}
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if header.LastJobsAddr == 0 {
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return nil, nil, fmt.Errorf("INFO No jobs exist in the state file")
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}
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// We seek to the jobs position in the state file
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stateFileHandle.Seek(int64(header.LastJobsAddr), 0)
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// We read how many jobs there are in the state file
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n, data = readNextBytes(stateFileHandle, 4)
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if n != 4 {
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return nil, nil, fmt.Errorf("INFO Corrupted state file : invalid numberOfJobs read length in %s", stateFile)
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}
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buffer = bytes.NewBuffer(data)
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err = binary.Read(buffer, binary.LittleEndian, &numberOfJobs)
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if err != nil {
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return nil, nil, fmt.Errorf("INFO Corrupted state file : binary.Read failed on numberOfJobs in %s : %s", stateFile, err)
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}
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if verbose {
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log.Printf("%d jobs found in state file\n", numberOfJobs)
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}
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|
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// We parse the job entries
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successfulJobs = make(map[string]uint64)
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errorJobs = make(map[string]uint64)
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for ; numberOfJobs > 0; numberOfJobs-- {
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var (
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jobResult jobEntry
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jobName string
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)
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n, data = readNextBytes(stateFileHandle, jobResultLength)
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if n != jobResultLength {
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return nil, nil, fmt.Errorf("INFO Corrupted state file : invalid job entry in %s", stateFile)
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}
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||||||
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buffer = bytes.NewBuffer(data)
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err = binary.Read(buffer, binary.LittleEndian, &jobResult)
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if err != nil {
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return nil, nil, fmt.Errorf("INFO Corrupted state file : binary.Read failed on job entry in %s : %s", stateFile, err)
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|
}
|
||||||
|
matches = jobNameRegex.FindSubmatchIndex(jobResult.Job[:])
|
||||||
|
if len(matches) >= 4 {
|
||||||
|
jobName = string(jobResult.Job[:matches[3]])
|
||||||
|
} else {
|
||||||
|
return nil, nil, fmt.Errorf("INFO Couldn't parse job name, this shouldn't happen : %s", jobResult.Job[:])
|
||||||
|
}
|
||||||
|
if verbose {
|
||||||
|
log.Printf("Parsed job entry: %s\n", jobResult)
|
||||||
|
}
|
||||||
|
// If the job is of type backup (B == ascii 66)
|
||||||
|
if jobResult.JobType == 66 {
|
||||||
|
var (
|
||||||
|
successExists bool
|
||||||
|
errorExists bool
|
||||||
|
currentSuccess uint64
|
||||||
|
currentError uint64
|
||||||
|
)
|
||||||
|
currentSuccess, successExists = successfulJobs[jobName]
|
||||||
|
currentError, errorExists = errorJobs[jobName]
|
||||||
|
// If the job is of status success (T == ascii 84)
|
||||||
|
if jobResult.JobStatus == 84 {
|
||||||
|
// if there is an older entry in errorJobs we delete it
|
||||||
|
if errorExists && jobResult.StartTime > currentError {
|
||||||
|
delete(errorJobs, jobName)
|
||||||
|
}
|
||||||
|
// if there are no entries more recent in successfulJobs we add this one
|
||||||
|
if !successExists || successExists && jobResult.StartTime > currentSuccess {
|
||||||
|
successfulJobs[jobName] = jobResult.StartTime
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
if !errorExists || jobResult.StartTime > currentError {
|
||||||
|
errorJobs[jobName] = jobResult.StartTime
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return
|
||||||
|
}
|
||||||
Loading…
Add table
Reference in a new issue