add restore process for ovn nb db

kubeovn · Mar 9, 2022 · 59594fe · 59594fe
1 parent de79498
commit 59594fe
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Showing 9 changed files with 199 additions and 11 deletions.
diff --git a/dist/images/install.sh b/dist/images/install.sh
@@ -944,6 +944,7 @@ rules:
       - statefulsets
       - daemonsets
       - deployments
+      - deployments/scale
     verbs:
       - create
       - delete
@@ -1417,6 +1418,7 @@ rules:
       - statefulsets
       - daemonsets
       - deployments
+      - deployments/scale
     verbs:
       - create
       - delete
@@ -2434,7 +2436,7 @@ OVN_SB_POD=
 showHelp(){
   echo "kubectl ko {subcommand} [option...]"
   echo "Available Subcommands:"
-  echo "  [nb|sb] [status|kick|backup|dbstatus]     ovn-db operations show cluster status, kick stale server, backup database or get db consistency status"
+  echo "  [nb|sb] [status|kick|backup|dbstatus|restore]     ovn-db operations show cluster status, kick stale server, backup database, get db consistency status or restore ovn nb db when met 'inconsistent data' error"
   echo "  nbctl [ovn-nbctl options ...]    invoke ovn-nbctl"
   echo "  sbctl [ovn-sbctl options ...]    invoke ovn-sbctl"
   echo "  vsctl {nodeName} [ovs-vsctl options ...]   invoke ovs-vsctl on the specified node"
@@ -2852,11 +2854,57 @@ dbtool(){
           kubectl exec "$OVN_NB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovsdb-tool cluster-to-standalone /etc/ovn/ovnnb_db.$suffix.backup /etc/ovn/ovnnb_db.db
           kubectl cp $KUBE_OVN_NS/$OVN_NB_POD:/etc/ovn/ovnnb_db.$suffix.backup $(pwd)/ovnnb_db.$suffix.backup
           kubectl exec "$OVN_NB_POD" -n $KUBE_OVN_NS -c ovn-central -- rm -f /etc/ovn/ovnnb_db.$suffix.backup
-          echo "backup $component to $(pwd)/ovnnb_db.$suffix.backup"
+          echo "backup ovn-$component db to $(pwd)/ovnnb_db.$suffix.backup"
           ;;
         dbstatus)
           kubectl exec "$OVN_NB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovn-appctl -t /var/run/ovn/ovnnb_db.ctl ovsdb-server/get-db-storage-status OVN_Northbound
           ;;
+        restore)
+          # set ovn-central replicas to 0
+          replicas=$(kubectl get deployment -n $KUBE_OVN_NS ovn-central -o jsonpath={.spec.replicas})
+          kubectl scale deployment -n $KUBE_OVN_NS ovn-central --replicas=0
+          echo "ovn-central original replicas is $replicas"
+
+          # backup ovn-nb db
+          declare nodeIpArray
+          declare podNameArray
+          nodeIps=`kubectl get node -lkube-ovn/role=master -o wide | grep -v "INTERNAL-IP" | awk '{print $6}'`
+          firstIP=${nodeIps[0]}
+          podNames=`kubectl get pod -n $KUBE_OVN_NS | grep ovs-ovn | awk '{print $1}'`
+          echo "first nodeIP is $firstIP"
+
+          i=0
+          for nodeIp in $nodeIps
+          do
+            for pod in $podNames
+            do
+              hostip=$(kubectl get pod -n $KUBE_OVN_NS $pod -o jsonpath={.status.hostIP})
+              if [ $nodeIp = $hostip ]; then
+                nodeIpArray[$i]=$nodeIp
+                podNameArray[$i]=$pod
+                i=`expr $i + 1`
+                echo "ovs-ovn pod on node $nodeIp is $pod"
+                break
+              fi
+            done
+          done
+
+          echo "backup nb db file"
+          docker run -it -v /etc/origin/ovn:/etc/ovn $REGISTRY/kube-ovn:$VERSION bash -c "ovsdb-tool cluster-to-standalone  /etc/ovn/ovnnb_db_standalone.db  /etc/ovn/ovnnb_db.db"
+
+          # mv all db files
+          for pod in ${podNameArray[@]}
+          do
+            kubectl exec -it -n $KUBE_OVN_NS $pod -- mv /etc/ovn/ovnnb_db.db /tmp
+            kubectl exec -it -n $KUBE_OVN_NS $pod -- mv /etc/ovn/ovnsb_db.db /tmp
+          done
+
+          # restore db and replicas
+          echo "restore nb db file, operate in pod ${podNameArray[0]}"
+          kubectl exec -it -n $KUBE_OVN_NS ${podNameArray[0]} -- mv /etc/ovn/ovnnb_db_standalone.db /etc/ovn/ovnnb_db.db
+          kubectl scale deployment -n $KUBE_OVN_NS ovn-central --replicas=$replicas
+          echo "finish restore nb db file and ovn-central replicas"
+          ;;
         *)
           echo "unknown action $action"
       esac
@@ -2874,11 +2922,14 @@ dbtool(){
           kubectl exec "$OVN_SB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovsdb-tool cluster-to-standalone /etc/ovn/ovnsb_db.$suffix.backup /etc/ovn/ovnsb_db.db
           kubectl cp $KUBE_OVN_NS/$OVN_SB_POD:/etc/ovn/ovnsb_db.$suffix.backup $(pwd)/ovnsb_db.$suffix.backup
           kubectl exec "$OVN_SB_POD" -n $KUBE_OVN_NS -c ovn-central -- rm -f /etc/ovn/ovnsb_db.$suffix.backup
-          echo "backup $component to $(pwd)/ovnsb_db.$suffix.backup"
+          echo "backup ovn-$component db to $(pwd)/ovnsb_db.$suffix.backup"
           ;;
         dbstatus)
           kubectl exec "$OVN_NB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovn-appctl -t /var/run/ovn/ovnsb_db.ctl ovsdb-server/get-db-storage-status OVN_Southbound
           ;;
+        restore)
+          echo "restore cmd is only used for nb db"
+          ;;
         *)
           echo "unknown action $action"
       esac

diff --git a/dist/images/kubectl-ko b/dist/images/kubectl-ko
@@ -8,7 +8,7 @@ OVN_SB_POD=
 showHelp(){
   echo "kubectl ko {subcommand} [option...]"
   echo "Available Subcommands:"
-  echo "  [nb|sb] [status|kick|backup]     ovn-db operations show cluster status, kick stale server or backup database"
+  echo "  [nb|sb] [status|kick|backup|dbstatus|restore]     ovn-db operations show cluster status, kick stale server, backup database, get db consistency status or restore ovn nb db when met 'inconsistent data' error"
   echo "  nbctl [ovn-nbctl options ...]    invoke ovn-nbctl"
   echo "  sbctl [ovn-sbctl options ...]    invoke ovn-sbctl"
   echo "  vsctl {nodeName} [ovs-vsctl options ...]   invoke ovs-vsctl on the specified node"
@@ -423,11 +423,60 @@ dbtool(){
           kubectl exec "$OVN_NB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovs-appctl -t /var/run/ovn/ovnnb_db.ctl cluster/kick OVN_Northbound "$1"
           ;;
         backup)
-          kubectl exec "$OVN_NB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovsdb-tool cluster-to-standalone /tmp/ovnnb_db.$suffix.backup /etc/ovn/ovnnb_db.db
-          kubectl cp $KUBE_OVN_NS/$OVN_NB_POD:/tmp/ovnnb_db.$suffix.backup $(pwd)/ovnnb_db.$suffix.backup
-          kubectl exec "$OVN_NB_POD" -n $KUBE_OVN_NS -c ovn-central -- rm -f /tmp/ovnnb_db.$suffix.backup
+          kubectl exec "$OVN_NB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovsdb-tool cluster-to-standalone /etc/ovn/ovnnb_db.$suffix.backup /etc/ovn/ovnnb_db.db
+          kubectl cp $KUBE_OVN_NS/$OVN_NB_POD:/etc/ovn/ovnnb_db.$suffix.backup $(pwd)/ovnnb_db.$suffix.backup
+          kubectl exec "$OVN_NB_POD" -n $KUBE_OVN_NS -c ovn-central -- rm -f /etc/ovn/ovnnb_db.$suffix.backup
           echo "backup ovn-$component db to $(pwd)/ovnnb_db.$suffix.backup"
           ;;
+        dbstatus)
+          kubectl exec "$OVN_NB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovn-appctl -t /var/run/ovn/ovnnb_db.ctl ovsdb-server/get-db-storage-status OVN_Northbound
+          ;;
+        restore)
+          # set ovn-central replicas to 0
+          replicas=$(kubectl get deployment -n $KUBE_OVN_NS ovn-central -o jsonpath={.spec.replicas})
+          kubectl scale deployment -n $KUBE_OVN_NS ovn-central --replicas=0
+          echo "ovn-central original replicas is $replicas"
+
+          # backup ovn-nb db
+          declare nodeIpArray
+          declare podNameArray
+          nodeIps=`kubectl get node -lkube-ovn/role=master -o wide | grep -v "INTERNAL-IP" | awk '{print $6}'`
+          firstIP=${nodeIps[0]}
+          podNames=`kubectl get pod -n $KUBE_OVN_NS | grep ovs-ovn | awk '{print $1}'`
+          echo "first nodeIP is $firstIP"
+
+          i=0
+          for nodeIp in $nodeIps
+          do
+            for pod in $podNames
+            do
+              hostip=$(kubectl get pod -n $KUBE_OVN_NS $pod -o jsonpath={.status.hostIP})
+              if [ $nodeIp = $hostip ]; then
+                nodeIpArray[$i]=$nodeIp
+                podNameArray[$i]=$pod
+                i=`expr $i + 1`
+                echo "ovs-ovn pod on node $nodeIp is $pod"
+                break
+              fi
+            done
+          done
+
+          echo "backup nb db file"
+          docker run -it -v /etc/origin/ovn:/etc/ovn $REGISTRY/kube-ovn:$VERSION bash -c "ovsdb-tool cluster-to-standalone  /etc/ovn/ovnnb_db_standalone.db  /etc/ovn/ovnnb_db.db"
+
+          # mv all db files
+          for pod in ${podNameArray[@]}
+          do
+            kubectl exec -it -n $KUBE_OVN_NS $pod -- mv /etc/ovn/ovnnb_db.db /tmp
+            kubectl exec -it -n $KUBE_OVN_NS $pod -- mv /etc/ovn/ovnsb_db.db /tmp
+          done
+
+          # restore db and replicas
+          echo "restore nb db file, operate in pod ${podNameArray[0]}"
+          kubectl exec -it -n $KUBE_OVN_NS ${podNameArray[0]} -- mv /etc/ovn/ovnnb_db_standalone.db /etc/ovn/ovnnb_db.db
+          kubectl scale deployment -n $KUBE_OVN_NS ovn-central --replicas=$replicas
+          echo "finish restore nb db file and ovn-central replicas"
+          ;;
         *)
           echo "unknown action $action"
       esac
@@ -442,11 +491,17 @@ dbtool(){
           kubectl exec "$OVN_SB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovs-appctl -t /var/run/ovn/ovnsb_db.ctl cluster/kick OVN_Southbound "$1"
           ;;
         backup)
-          kubectl exec "$OVN_SB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovsdb-tool cluster-to-standalone /tmp/ovnsb_db.$suffix.backup /etc/ovn/ovnsb_db.db
-          kubectl cp $KUBE_OVN_NS/$OVN_SB_POD:/tmp/ovnsb_db.$suffix.backup $(pwd)/ovnsb_db.$suffix.backup
-          kubectl exec "$OVN_SB_POD" -n $KUBE_OVN_NS -c ovn-central -- rm -f /tmp/ovnsb_db.$suffix.backup
+          kubectl exec "$OVN_SB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovsdb-tool cluster-to-standalone /etc/ovn/ovnsb_db.$suffix.backup /etc/ovn/ovnsb_db.db
+          kubectl cp $KUBE_OVN_NS/$OVN_SB_POD:/etc/ovn/ovnsb_db.$suffix.backup $(pwd)/ovnsb_db.$suffix.backup
+          kubectl exec "$OVN_SB_POD" -n $KUBE_OVN_NS -c ovn-central -- rm -f /etc/ovn/ovnsb_db.$suffix.backup
           echo "backup ovn-$component db to $(pwd)/ovnsb_db.$suffix.backup"
           ;;
+        dbstatus)
+          kubectl exec "$OVN_NB_POD" -n $KUBE_OVN_NS -c ovn-central -- ovn-appctl -t /var/run/ovn/ovnsb_db.ctl ovsdb-server/get-db-storage-status OVN_Southbound
+          ;;
+        restore)
+          echo "restore cmd is only used for nb db"
+          ;;
         *)
           echo "unknown action $action"
       esac
@@ -505,6 +560,6 @@ case $subcommand in
     reload
     ;;
   *)
-    showHelp
+  showHelp
     ;;
 esac
diff --git a/dist/images/restore-ovn-nb-db.sh b/dist/images/restore-ovn-nb-db.sh
@@ -0,0 +1,47 @@
+#!/bin/bash
+
+KUBE_OVN_NS=kube-system
+# set ovn-central replicas to 0
+replicas=$(kubectl get deployment -n $KUBE_OVN_NS ovn-central -o jsonpath={.spec.replicas})
+kubectl scale deployment -n $KUBE_OVN_NS ovn-central --replicas=0
+echo "ovn-central original replicas is $replicas"
+
+# backup ovn-nb db
+declare nodeIpArray
+declare podNameArray
+nodeIps=`kubectl get node -lkube-ovn/role=master -o wide | grep -v "INTERNAL-IP" | awk '{print $6}'`
+firstIP=${nodeIps[0]}
+podNames=`kubectl get pod -n $KUBE_OVN_NS | grep ovs-ovn | awk '{print $1}'`
+echo "first nodeIP is $firstIP"
+
+i=0
+for nodeIp in $nodeIps
+do
+  for pod in $podNames
+  do
+    hostip=$(kubectl get pod -n $KUBE_OVN_NS $pod -o jsonpath={.status.hostIP})
+    if [ $nodeIp = $hostip ]; then
+      nodeIpArray[$i]=$nodeIp
+      podNameArray[$i]=$pod
+      i=`expr $i + 1`
+      echo "ovs-ovn pod on node $nodeIp is $pod"
+      break
+    fi
+  done
+done
+
+echo "backup nb db file"
+ovsdb-tool cluster-to-standalone  /etc/ovn/ovnnb_db_standalone.db  /etc/ovn/ovnnb_db.db
+
+# mv all db files
+for pod in ${podNameArray[@]}
+do
+  kubectl exec -it -n $KUBE_OVN_NS $pod -- mv /etc/ovn/ovnnb_db.db /tmp
+  kubectl exec -it -n $KUBE_OVN_NS $pod -- mv /etc/ovn/ovnsb_db.db /tmp
+done
+
+# restore db and replicas
+echo "restore nb db file"
+mv /etc/ovn/ovnnb_db_standalone.db /etc/ovn/ovnnb_db.db
+kubectl scale deployment -n $KUBE_OVN_NS ovn-central --replicas=$replicas
+echo "finish restore nb db file and ovn-central replicas"
diff --git a/dist/images/update/1.7-1.8.2.sh b/dist/images/update/1.7-1.8.2.sh
@@ -714,6 +714,7 @@ rules:
       - statefulsets
       - daemonsets
       - deployments
+      - deployments/scale
     verbs:
       - create
       - delete

diff --git a/dist/images/update/1.8.2-1.9.0.sh b/dist/images/update/1.8.2-1.9.0.sh
@@ -768,6 +768,7 @@ rules:
       - statefulsets
       - daemonsets
       - deployments
+      - deployments/scale
     verbs:
       - create
       - delete

diff --git a/pkg/ovnmonitor/exporter.go b/pkg/ovnmonitor/exporter.go
@@ -2,6 +2,7 @@ package ovnmonitor
 
 import (
 	"os"
+	"os/exec"
 	"sync"
 	"time"
 
@@ -15,6 +16,8 @@ var (
 	appName          = "ovn-monitor"
 	isClusterEnabled = true
 	tryConnectCnt    = 0
+	checkNbDbCnt     = 0
+	checkSbDbCnt     = 0
 )
 
 // Exporter collects OVN data from the given server and exports them using
@@ -267,6 +270,33 @@ func (e *Exporter) exportOvnDBStatusGauge() {
 			metricDBStatus.WithLabelValues(e.Client.System.Hostname, database).Set(1)
 		} else {
 			metricDBStatus.WithLabelValues(e.Client.System.Hostname, database).Set(0)
+
+			switch database {
+			case "OVN_Northbound":
+				checkNbDbCnt++
+				if checkNbDbCnt < 6 {
+					klog.Warningf("Failed to get OVN NB DB status for %v times", checkNbDbCnt)
+					return
+				} else {
+					klog.Warningf("Failed to get OVN NB DB status for %v times, ready to restore OVN DB", checkNbDbCnt)
+					checkNbDbCnt = 0
+				}
+			case "OVN_Southbound":
+				checkSbDbCnt++
+				if checkSbDbCnt < 6 {
+					klog.Warningf("Failed to get OVN SB DB status for %v times", checkSbDbCnt)
+					return
+				} else {
+					klog.Warningf("Failed to get OVN SB DB status for %v times, ready to restore OVN DB", checkSbDbCnt)
+					checkSbDbCnt = 0
+				}
+			}
+
+			output, err := exec.Command("/bin/bash", "/kube-ovn/restore-ovn-nb-db.sh").CombinedOutput()
+			if err != nil {
+				klog.Errorf("Failed to restore OVN DB, err %v", err)
+			}
+			klog.Infof("restore OVN DB %v, process output %v", database, string(output))
 		}
 	}
 }
diff --git a/yamls/ovn-dpdk.yaml b/yamls/ovn-dpdk.yaml
@@ -99,6 +99,7 @@ rules:
       - statefulsets
       - daemonsets
       - deployments
+      - deployments/scale
     verbs:
       - get
       - list

diff --git a/yamls/ovn-ha.yaml b/yamls/ovn-ha.yaml
@@ -98,6 +98,7 @@ rules:
       - statefulsets
       - daemonsets
       - deployments
+      - deployments/scale
     verbs:
       - get
       - list

diff --git a/yamls/ovn.yaml b/yamls/ovn.yaml
@@ -109,6 +109,7 @@ rules:
       - statefulsets
       - daemonsets
       - deployments
+      - deployments/scale
     verbs:
       - create
       - delete