Added tests to the main package and completely reworked the code around that

zabbix/flags.go

@@ -0,0 +1,21 @@
+package zabbix
+
+import (
+	"flag"
+)
+
+var (
+	stateFileName string
+	workDir       string
+)
+
+func processFlags() (err error) {
+	flag.StringVar(&stateFileName, "f", "", "Force the state file to use, defaults to "+bareosStateFile+" if it exists else "+baculaStateFile+".")
+	flag.StringVar(&workDir, "w", "", "Force the work directory to use, defaults to "+bareosWorkDir+" if it exists else "+baculaWorkDir+".")
+	flag.Parse()
+	err = checkWorkDir()
+	if err == nil {
+		err = checkStateFile()
+	}
+	return
+}

zabbix/main.go

@@ -0,0 +1,104 @@
+package zabbix
+
+import (
+	"bareos-zabbix-check/job"
+	"bareos-zabbix-check/spool"
+	"bareos-zabbix-check/state"
+	"fmt"
+	"os"
+	"path/filepath"
+	"time"
+)
+
+const (
+	spoolFileName = "bareos-zabbix-check.spool"
+)
+
+var now = uint64(time.Now().Unix())
+
+// Main the true main function of this program
+func Main() string {
+	err := processFlags()
+	if err != nil {
+		return fmt.Sprintf("INFO Failed to init programm : %s", err)
+	}
+	// Open the state file
+	stateFile, err := os.Open(stateFileName)
+	if err != nil {
+		return fmt.Sprintf("INFO Could not open state file : %s", err)
+	}
+	defer stateFile.Close()
+	// parse the state file
+	header, err := state.ParseHeader(stateFile)
+	if err != nil {
+		return fmt.Sprintf("INFO Could not parse state file header : %s", err)
+	}
+	// seek to the job entries in the state file
+	offset, err := stateFile.Seek(int64(header.LastJobsAddr), 0)
+	if err != nil {
+		return fmt.Sprintf("INFO Couldn't seek to jobs position in state file : %s", err)
+	}
+	if uint64(offset) != header.LastJobsAddr {
+		return fmt.Sprint("INFO Truncated state file")
+	}
+	// Then parse the jobs in the state file
+	jobs, err := state.ParseJobs(stateFile)
+	if err != nil {
+		return fmt.Sprintf("INFO Could not parse jobs in state file : %s", err)
+	}
+
+	// We will check for errors in loading the spool file only at the end. If all jobs ran successfully without errors
+	// in the state file and we manage to write a new spool file without errors, then we will ignore any error here to
+	// avoid false positives during backup bootstrap
+	// Open the spool file
+	spoolFile, spoolErr := os.Open(filepath.Join(workDir, spoolFileName))
+	var spoolJobs []job.Job
+	if err == nil {
+		defer spoolFile.Close()
+		spoolJobs, spoolErr = spool.Parse(spoolFile)
+	}
+
+	jobs = job.KeepOldestOnly(append(jobs, spoolJobs...))
+
+	// we write this new spool
+	spoolFile, err = os.Create(filepath.Join(workDir, spoolFileName))
+	if err == nil {
+		defer spoolFile.Close()
+		err = spool.Serialize(spoolFile, jobs)
+	}
+	if err != nil {
+		return fmt.Sprintf("AVERAGE: Error saving the spool file : %s\n", err)
+	}
+
+	var (
+		errorString   string
+		missingString string
+	)
+	// We build the error strings
+	for i := 0; i < len(jobs); i++ {
+		job := jobs[i]
+		if job.Success {
+			if job.Timestamp < now-24*3600 {
+				if missingString == "" {
+					missingString = fmt.Sprintf("missing: %s", job.Name)
+				} else {
+					missingString = fmt.Sprintf("%s, %s", missingString, job.Name)
+				}
+			}
+		} else {
+			if errorString == "" {
+				errorString = fmt.Sprintf("errors: %s", job.Name)
+			} else {
+				errorString = fmt.Sprintf("%s, %s", errorString, job.Name)
+			}
+		}
+	}
+	// Finally we output
+	if errorString != "" || missingString != "" {
+		if spoolErr != nil {
+			return fmt.Sprintf("AVERAGE: %s %s %s", errorString, missingString, spoolErr)
+		}
+		return fmt.Sprintf("AVERAGE: %s %s", errorString, missingString)
+	}
+	return "OK"
+}

zabbix/main_test.go

@@ -0,0 +1,56 @@
+package zabbix
+
+import (
+	"flag"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestMain(t *testing.T) {
+	os.RemoveAll("tmp")
+	cwd, _ := os.Getwd()
+	err := os.MkdirAll("tmp/ok-18.2", 0777)
+	if err != nil {
+		t.Skipf("skipping main tests because tmp directory cannot be created : %s", err)
+	}
+	os.MkdirAll("tmp/ok-17.2", 0777)
+	os.MkdirAll("tmp/no_state_file", 0777)
+	os.MkdirAll("tmp/bacula_auto_detect_failed/var/lib/bacula", 0777)
+	os.MkdirAll("tmp/bareos_auto_detect_failed/var/lib/bareos", 0777)
+	os.MkdirAll("tmp/error", 0777)
+	os.Symlink("../../testdata/bareos-fd-17.2.state", "tmp/ok-17.2/state")
+	os.Symlink("../../testdata/bareos-fd-18.2.state", "tmp/ok-18.2/state")
+	os.Symlink("../../testdata/bareos-fd-18.2.state-with-error", "tmp/error/state")
+	tests := []struct {
+		name      string
+		timestamp uint64
+		rootDir   string
+		args      []string
+		want      string
+	}{
+		{"failed bacula_auto_detect", 0, "tmp/bacula_auto_detect_failed", []string{}, "INFO Failed to init programm : Could not find a suitable state file. Has a job ever run?"},
+		{"failed bareos_auto_detect", 0, "tmp/bareos_auto_detect_failed", []string{}, "INFO Failed to init programm : Could not find a suitable state file. Has a job ever run?"},
+		{"failed auto_detect", 0, "tmp/non_existent", []string{}, "INFO Failed to init programm : Could not find a suitable work directory. Is bareos or bacula installed?"},
+		{"no work directory", 0, "tmp", []string{"-w", "/non_existent"}, "INFO Failed to init programm : Invalid work directory /home/julien/git/awh/bareos-zabbix-check/zabbix/tmp/non_existent : it does not exist or is not a directory"},
+		{"no state file auto_detect", 0, "tmp", []string{"-w", "/no_state_file"}, "INFO Failed to init programm : Could not find a suitable state file. Has a job ever run?"},
+		{"no state file", 0, "tmp", []string{"-w", "/no_state_file", "-f", "test"}, "INFO Failed to init programm : The state file /home/julien/git/awh/bareos-zabbix-check/zabbix/tmp/no_state_file/test does not exist"},
+		{"ok bareos 18.2", 1582579731, "tmp/ok-18.2", []string{"-w", "/", "-f", "state"}, "OK"},
+		{"ok bareos 17.2", 1582579731, "tmp/ok-17.2", []string{"-w", "/", "-f", "state"}, "OK"},
+		{"missing", 1582709331, "tmp/ok-18.2", []string{"-w", "/", "-f", "state"}, "AVERAGE:  missing: awhphpipam1_percona_xtrabackup, awhphpipam1_LinuxAll, awhphpipam1_www"},
+		{"error", 1582579731, "tmp/error", []string{"-w", "/", "-f", "state"}, "AVERAGE: errors: awhphpipam1_percona_xtrabackup, awhphpipam1_www  Corrupted spool file: invalid argument"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			now = tt.timestamp
+			root = filepath.Join(cwd, tt.rootDir)
+			flag.CommandLine = flag.NewFlagSet("bareos-zabbix-check", flag.ExitOnError) //flags are now reset
+			os.Args = append([]string{"bareos-zabbix-check"}, tt.args...)
+			if got := Main(); got != tt.want {
+				t.Log(workDir)
+				t.Errorf("Main() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+	os.RemoveAll("tmp")
+}

zabbix/statefile.go

@@ -0,0 +1,34 @@
+package zabbix
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+const (
+	bareosStateFile = "bareos-fd.9102.state"
+	baculaStateFile = "bacula-fd.9102.state"
+)
+
+func checkStateFile() error {
+	// Finds the state file to parse
+	if stateFileName != "" {
+		stateFileName = filepath.Join(workDir, stateFileName)
+		info, err := os.Stat(stateFileName)
+		if os.IsNotExist(err) || info.IsDir() {
+			return fmt.Errorf("The state file %s does not exist", stateFileName)
+		}
+	} else {
+		stateFileName = filepath.Join(workDir, bareosStateFile)
+		info, err := os.Stat(stateFileName)
+		if os.IsNotExist(err) || info.IsDir() {
+			stateFileName = filepath.Join(workDir, baculaStateFile)
+			info, err = os.Stat(stateFileName)
+			if os.IsNotExist(err) || info.IsDir() {
+				return fmt.Errorf("Could not find a suitable state file. Has a job ever run?")
+			}
+		}
+	}
+	return nil
+}

zabbix/workdir.go

@@ -0,0 +1,38 @@
+package zabbix
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+const (
+	bareosWorkDir = "/var/lib/bareos"
+	baculaWorkDir = "/var/lib/bacula"
+)
+
+var root = "/"
+
+// checkWorkDir checks if a work directory is valid
+func checkWorkDir() error {
+	// Determine the work directory to use.
+	if workDir != "" {
+		workDir = filepath.Join(root, workDir)
+		info, err := os.Stat(workDir)
+		if os.IsNotExist(err) || !info.IsDir() {
+			return fmt.Errorf("Invalid work directory %s : it does not exist or is not a directory", workDir)
+		}
+	} else {
+		workDir = filepath.Join(root, bareosWorkDir)
+		info, err := os.Stat(workDir)
+		if os.IsNotExist(err) || !info.IsDir() {
+			workDir = filepath.Join(root, baculaWorkDir)
+			info, err := os.Stat(workDir)
+			if os.IsNotExist(err) || !info.IsDir() {
+				return fmt.Errorf("Could not find a suitable work directory. Is bareos or bacula installed?")
+			}
+		}
+	}
+	workDir = filepath.Clean(workDir)
+	return nil
+}