fix: etcd backup service did not work

Signed-off-by: 24sama <jacksama@foxmail.com>

pkg/etcd/module.go

@@ -17,10 +17,13 @@
 package etcd
 
 import (
+	"path/filepath"
+
 	kubekeyapiv1alpha2 "github.com/kubesphere/kubekey/apis/kubekey/v1alpha2"
 	"github.com/kubesphere/kubekey/pkg/common"
 	"github.com/kubesphere/kubekey/pkg/core/action"
 	"github.com/kubesphere/kubekey/pkg/core/task"
+	"github.com/kubesphere/kubekey/pkg/core/util"
 	"github.com/kubesphere/kubekey/pkg/etcd/templates"
 )
 
@@ -387,7 +390,46 @@ func (b *BackupModule) Init() {
 		Parallel: true,
 	}
 
+	generateBackupETCDService := &task.RemoteTask{
+		Name:  "GenerateBackupETCDService",
+		Desc:  "Generate backup ETCD service",
+		Hosts: b.Runtime.GetHostsByRole(common.ETCD),
+		Action: &action.Template{
+			Template: templates.BackupETCDService,
+			Dst:      filepath.Join("/etc/systemd/system/", templates.BackupETCDService.Name()),
+			Data: util.Data{
+				"ScriptPath": filepath.Join(b.KubeConf.Cluster.Etcd.BackupScriptDir, "etcd-backup.sh"),
+			},
+		},
+		Parallel: true,
+	}
+
+	generateBackupETCDTimer := &task.RemoteTask{
+		Name:  "GenerateBackupETCDTimer",
+		Desc:  "Generate backup ETCD timer",
+		Hosts: b.Runtime.GetHostsByRole(common.ETCD),
+		Action: &action.Template{
+			Template: templates.BackupETCDTimer,
+			Dst:      filepath.Join("/etc/systemd/system/", templates.BackupETCDTimer.Name()),
+			Data: util.Data{
+				"OnCalendarStr": templates.BackupTimeOnCalendar(b.KubeConf.Cluster.Etcd.BackupPeriod),
+			},
+		},
+		Parallel: true,
+	}
+
+	enable := &task.RemoteTask{
+		Name:     "EnableBackupETCDService",
+		Desc:     "Enable backup etcd service",
+		Hosts:    b.Runtime.GetHostsByRole(common.ETCD),
+		Action:   new(EnableBackupETCDService),
+		Parallel: true,
+	}
+
 	b.Tasks = []task.Interface{
 		backupETCD,
+		generateBackupETCDService,
+		generateBackupETCDTimer,
+		enable,
 	}
 }

pkg/etcd/tasks.go

@@ -18,10 +18,13 @@ package etcd
 
 import (
 	"fmt"
-	"github.com/kubesphere/kubekey/pkg/files"
 	"path/filepath"
 	"strings"
 
+	"github.com/kubesphere/kubekey/pkg/files"
+
+	"github.com/pkg/errors"
+
 	kubekeyapiv1alpha2 "github.com/kubesphere/kubekey/apis/kubekey/v1alpha2"
 	"github.com/kubesphere/kubekey/pkg/common"
 	"github.com/kubesphere/kubekey/pkg/core/action"
@@ -29,7 +32,6 @@ import (
 	"github.com/kubesphere/kubekey/pkg/core/util"
 	"github.com/kubesphere/kubekey/pkg/etcd/templates"
 	"github.com/kubesphere/kubekey/pkg/utils"
-	"github.com/pkg/errors"
 )
 
 type EtcdNode struct {
@@ -390,9 +392,7 @@ func (b *BackupETCD) Execute(runtime connector.Runtime) error {
 			"Etcdendpoint":        fmt.Sprintf("https://%s:2379", runtime.RemoteHost().GetInternalAddress()),
 			"Backupdir":           b.KubeConf.Cluster.Etcd.BackupDir,
 			"KeepbackupNumber":    b.KubeConf.Cluster.Etcd.KeepBackupNumber,
-			"EtcdBackupPeriod":    b.KubeConf.Cluster.Etcd.BackupPeriod,
 			"EtcdBackupScriptDir": b.KubeConf.Cluster.Etcd.BackupScriptDir,
-			"EtcdBackupHour":      templates.BackupTimeInterval(runtime, b.KubeConf),
 		},
 	}
 
@@ -404,9 +404,17 @@ func (b *BackupETCD) Execute(runtime connector.Runtime) error {
 	if _, err := runtime.GetRunner().SudoCmd(fmt.Sprintf("chmod +x %s/etcd-backup.sh", b.KubeConf.Cluster.Etcd.BackupScriptDir), false); err != nil {
 		return errors.Wrap(errors.WithStack(err), "chmod etcd backup script failed")
 	}
+	return nil
+}
 
-	if _, err := runtime.GetRunner().SudoCmd(fmt.Sprintf("sh %s/etcd-backup.sh", b.KubeConf.Cluster.Etcd.BackupScriptDir), false); err != nil {
-		return errors.Wrap(errors.WithStack(err), "Failed to run the etcd-backup.sh")
+type EnableBackupETCDService struct {
+	common.KubeAction
+}
+
+func (e *EnableBackupETCDService) Execute(runtime connector.Runtime) error {
+	if _, err := runtime.GetRunner().SudoCmd("systemctl enable --now backup-etcd.timer",
+		false); err != nil {
+		return errors.Wrap(errors.WithStack(err), "enable backup-etcd.service failed")
 	}
 	return nil
 }

pkg/etcd/templates/backup_script.go

@@ -17,12 +17,9 @@
 package templates
 
 import (
-	"github.com/kubesphere/kubekey/pkg/common"
-	"github.com/kubesphere/kubekey/pkg/core/connector"
-	"github.com/kubesphere/kubekey/pkg/core/logger"
-	"github.com/lithammer/dedent"
-	"strconv"
 	"text/template"
+
+	"github.com/lithammer/dedent"
 )
 
 // EtcdBackupScriptTmpl defines the template of etcd backup script.
@@ -34,9 +31,7 @@ ENDPOINTS='{{ .Etcdendpoint }}'
 ETCD_DATA_DIR="/var/lib/etcd"
 BACKUP_DIR="{{ .Backupdir }}/etcd-$(date +%Y-%m-%d-%H-%M-%S)"
 KEEPBACKUPNUMBER='{{ .KeepbackupNumber }}'
-ETCDBACKUPPERIOD='{{ .EtcdBackupPeriod }}'
 ETCDBACKUPSCIPT='{{ .EtcdBackupScriptDir }}'
-ETCDBACKUPHOUR='{{ .EtcdBackupHour }}'
 
 ETCDCTL_CERT="/etc/ssl/etcd/ssl/admin-{{ .Hostname }}.pem"
 ETCDCTL_KEY="/etc/ssl/etcd/ssl/admin-{{ .Hostname }}-key.pem"
@@ -59,35 +54,4 @@ sleep 3
 
 cd $BACKUP_DIR/../;ls -lt |awk '{if(NR > '$KEEPBACKUPNUMBER'){print "rm -rf "$9}}'|sh
 
-if [[ ! $ETCDBACKUPHOUR ]]; then
-  time="*/$ETCDBACKUPPERIOD * * * *"
-else
-  if [[ 0 == $ETCDBACKUPPERIOD ]];then
-    time="* */$ETCDBACKUPHOUR * * *"
-  else
-    time="*/$ETCDBACKUPPERIOD */$ETCDBACKUPHOUR * * *"
-  fi
-fi
-
-crontab -l | grep -v '#' > /tmp/file
-echo "$time sh $ETCDBACKUPSCIPT/etcd-backup.sh" >> /tmp/file && awk ' !x[$0]++{print > "/tmp/file"}' /tmp/file
-crontab /tmp/file
-rm -rf /tmp/file
-
 `)))
-
-func BackupTimeInterval(runtime connector.Runtime, kubeConf *common.KubeConf) string {
-	var etcdBackupHour string
-	if kubeConf.Cluster.Etcd.BackupPeriod != 0 {
-		period := kubeConf.Cluster.Etcd.BackupPeriod
-		if period > 60 && period < 1440 {
-			kubeConf.Cluster.Etcd.BackupPeriod = period % 60
-			etcdBackupHour = strconv.Itoa(period / 60)
-		}
-		if period > 1440 {
-			logger.Log.Message(runtime.RemoteHost().GetName(), "etcd backup cannot last more than one day, Please change it to within one day or KubeKey will set it to the default value '24'.")
-			return "24"
-		}
-	}
-	return etcdBackupHour
-}

pkg/etcd/templates/backup_service.go

@@ -0,0 +1,71 @@
+/*
+ Copyright 2022 The KubeSphere Authors.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+package templates
+
+import (
+	"fmt"
+	"strconv"
+	"text/template"
+
+	"github.com/lithammer/dedent"
+)
+
+var (
+	// BackupETCDService defines the template of backup-etcd service for systemd.
+	BackupETCDService = template.Must(template.New("backup-etcd.service").Parse(
+		dedent.Dedent(`[Unit]
+Description=Backup ETCD
+[Service]
+Type=oneshot
+ExecStart={{ .ScriptPath }}
+    `)))
+
+	// BackupETCDTimer defines the template of backup-etcd timer for systemd.
+	BackupETCDTimer = template.Must(template.New("backup-etcd.timer").Parse(
+		dedent.Dedent(`[Unit]
+Description=Timer to backup ETCD
+[Timer]
+{{- if .OnCalendarStr }}
+OnCalendar={{ .OnCalendarStr }}
+{{- else }}
+OnCalendar=*-*-* *:*/30:00
+{{- end }}
+Unit=backup-etcd.service
+[Install]
+WantedBy=multi-user.target
+    `)))
+)
+
+func BackupTimeOnCalendar(period int) string {
+	var onCalendar string
+	if period <= 0 {
+		onCalendar = "*-*-* *:00/30:00"
+	} else if period < 60 {
+		onCalendar = fmt.Sprintf("*-*-* *:00/%d:00", period)
+	} else if period >= 60 && period < 1440 {
+		hour := strconv.Itoa(period / 60)
+		minute := strconv.Itoa(period % 60)
+		if period%60 == 0 {
+			onCalendar = fmt.Sprintf("*-*-* 00/%s:00:00", hour)
+		} else {
+			onCalendar = fmt.Sprintf("*-*-* 00/%s:%s:00", hour, minute)
+		}
+	} else {
+		onCalendar = "*-*-* 00:00:00"
+	}
+	return onCalendar
+}

pkg/etcd/templates/backup_service_test.go

@@ -0,0 +1,52 @@
+/*
+ Copyright 2022 The KubeSphere Authors.
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+package templates
+
+import (
+	"testing"
+)
+
+func TestBackupTimeOnCalendar(t *testing.T) {
+	tests := []struct {
+		period int
+		want   string
+	}{
+		{
+			30,
+			"*-*-* *:00/30:00",
+		},
+		{
+			60,
+			"*-*-* 00/1:00:00",
+		},
+		{
+			70,
+			"*-*-* 00/1:10:00",
+		},
+		{
+			1500,
+			"*-*-* 00:00:00",
+		},
+	}
+	for _, tt := range tests {
+		t.Run("", func(t *testing.T) {
+			if got := BackupTimeOnCalendar(tt.period); got != tt.want {
+				t.Errorf("BackupTimeOnCalendar() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}