Add LastWAL in leader/health output (#5523)

api/sys_health.go

@@ -36,4 +36,5 @@ type HealthResponse struct {
 	Version                    string `json:"version"`
 	ClusterName                string `json:"cluster_name,omitempty"`
 	ClusterID                  string `json:"cluster_id,omitempty"`
+	LastWAL                    uint64 `json:"last_wal,omitempty"`
 }

api/sys_leader.go

@@ -25,4 +25,5 @@ type LeaderResponse struct {
 	LeaderClusterAddress     string `json:"leader_cluster_address"`
 	PerfStandby              bool   `json:"performance_standby"`
 	PerfStandbyLastRemoteWAL uint64 `json:"performance_standby_last_remote_wal"`
+	LastWAL                  uint64 `json:"last_wal"`
 }

command/format.go

@@ -379,6 +379,10 @@ func OutputSealStatus(ui cli.Ui, client *api.Client, status *api.SealStatusRespo
 		}
 	}
 
+	if leaderStatus.LastWAL != 0 {
+		out = append(out, fmt.Sprintf("Last WAL | %d", leaderStatus.LastWAL))
+	}
+
 	ui.Output(tableOutput(out, nil))
 	return 0
 }

http/sys_health.go

@@ -179,6 +179,11 @@ func getSysHealth(core *vault.Core, r *http.Request) (int, *HealthResponse, erro
 		ClusterName:                clusterName,
 		ClusterID:                  clusterID,
 	}
+
+	if init && !sealed && !standby {
+		body.LastWAL = vault.LastWAL(core)
+	}
+
 	return code, body, nil
 }
 
@@ -193,4 +198,5 @@ type HealthResponse struct {
 	Version                    string `json:"version"`
 	ClusterName                string `json:"cluster_name,omitempty"`
 	ClusterID                  string `json:"cluster_id,omitempty"`
+	LastWAL                    uint64 `json:"last_wal,omitempty"`
 }

http/sys_leader.go

@@ -38,6 +38,8 @@ func handleSysLeaderGet(core *vault.Core, w http.ResponseWriter, r *http.Request
 	}
 	if resp.PerfStandby {
 		resp.PerfStandbyLastRemoteWAL = vault.LastRemoteWAL(core)
+	} else if isLeader || !haEnabled {
+		resp.LastWAL = vault.LastWAL(core)
 	}
 
 	respondOk(w, resp)
@@ -50,4 +52,5 @@ type LeaderResponse struct {
 	LeaderClusterAddress     string `json:"leader_cluster_address"`
 	PerfStandby              bool   `json:"performance_standby"`
 	PerfStandbyLastRemoteWAL uint64 `json:"performance_standby_last_remote_wal"`
+	LastWAL                  uint64 `json:"last_wal,omitempty"`
 }

vault/core.go

@@ -86,6 +86,7 @@ var (
 	enterprisePreSeal    = enterprisePreSealImpl
 	startReplication     = startReplicationImpl
 	stopReplication      = stopReplicationImpl
+	LastWAL              = lastWALImpl
 	LastRemoteWAL        = lastRemoteWALImpl
 	WaitUntilWALShipped  = waitUntilWALShippedImpl
 )
@@ -1514,6 +1515,10 @@ func waitUntilWALShippedImpl(ctx context.Context, c *Core, index uint64) bool {
 	return true
 }
 
+func lastWALImpl(c *Core) uint64 {
+	return 0
+}
+
 func lastRemoteWALImpl(c *Core) uint64 {
 	return 0
 }