Enhance monitoring for serverless tenants in Hive KIKIMR-19289 (ydb-platform#710)

* Enhance monitoring for serverless tenants in Hive KIKIMR-19289

Author: pixcc

ydb/core/mind/hive/domain_info.h

@@ -15,6 +15,10 @@ struct TDomainInfo {
     TTabletId HiveId = 0;
     TMaybeServerlessComputeResourcesMode ServerlessComputeResourcesMode;
 
+    ui64 TabletsTotal = 0;
+    ui64 TabletsAlive = 0;
+    ui64 TabletsAliveInObjectDomain = 0;
+
     ENodeSelectionPolicy GetNodeSelectionPolicy() const;
 };
 

ydb/core/mind/hive/hive_impl.cpp

@@ -1550,7 +1550,9 @@ void THive::DeleteTablet(TTabletId tabletId) {
             }
             Y_ENSURE_LOG(nt->second.LockedTablets.count(&tablet) == 0, " Deleting tablet found on node " << nt->first << " in locked set");
         }
-        UpdateCounterTabletsTotal(-1 - (tablet.Followers.size()));
+        const i64 tabletsTotalDiff = -1 - (tablet.Followers.size());
+        UpdateCounterTabletsTotal(tabletsTotalDiff);
+        UpdateDomainTabletsTotal(tablet.ObjectDomain, tabletsTotalDiff);
         Tablets.erase(it);
     }
 }
@@ -1583,6 +1585,21 @@ void THive::KillNode(TNodeId nodeId, const TActorId& local) {
     Execute(CreateKillNode(nodeId, local));
 }
 
+void THive::UpdateDomainTabletsTotal(const TSubDomainKey& objectDomain, i64 tabletsTotalDiff) {
+    if (objectDomain) {
+        Domains[objectDomain].TabletsTotal += tabletsTotalDiff;
+    }
+}
+
+void THive::UpdateDomainTabletsAlive(const TSubDomainKey& objectDomain, i64 tabletsAliveDiff, const TSubDomainKey& tabletNodeDomain) {
+    if (objectDomain) {
+        Domains[objectDomain].TabletsAlive += tabletsAliveDiff;
+        if (tabletNodeDomain == objectDomain) {
+            Domains[objectDomain].TabletsAliveInObjectDomain += tabletsAliveDiff;
+        }
+    }
+}
+
 void THive::SetCounterTabletsTotal(ui64 tabletsTotal) {
     if (TabletCounters != nullptr) {
         auto& counter = TabletCounters->Simple()[NHive::COUNTER_TABLETS_TOTAL];

ydb/core/mind/hive/hive_impl.h

@@ -633,6 +633,8 @@ class THive : public TActor<THive>, public TTabletExecutedFlat, public THiveShar
     TTabletCategoryInfo& GetTabletCategory(TTabletCategoryId tabletCategoryId);
     void KillNode(TNodeId nodeId, const TActorId& local);
     void AddToBootQueue(TTabletInfo* tablet);
+    void UpdateDomainTabletsTotal(const TSubDomainKey& objectDomain, i64 tabletsTotalDiff);
+    void UpdateDomainTabletsAlive(const TSubDomainKey& objectDomain, i64 tabletsAliveDiff, const TSubDomainKey& tabletNodeDomain);
     void SetCounterTabletsTotal(ui64 tabletsTotal);
     void UpdateCounterTabletsTotal(i64 tabletsTotalDiff);
     void UpdateCounterTabletsAlive(i64 tabletsAliveDiff);

ydb/core/mind/hive/leader_tablet_info.cpp

@@ -63,6 +63,8 @@ TFollowerId TLeaderTabletInfo::GetFollowerPromotableOnNode(TNodeId nodeId) const
 }
 
 void TLeaderTabletInfo::AssignDomains(const TSubDomainKey& objectDomain, const TVector<TSubDomainKey>& allowedDomains) {
+    const TSubDomainKey oldObjectDomain = ObjectDomain;
+
     if (!allowedDomains.empty()) {
         NodeFilter.AllowedDomains = allowedDomains;
         if (!objectDomain) {
@@ -82,6 +84,22 @@ void TLeaderTabletInfo::AssignDomains(const TSubDomainKey& objectDomain, const T
         followerGroup.NodeFilter.AllowedDomains = NodeFilter.AllowedDomains;
         followerGroup.NodeFilter.ObjectDomain = NodeFilter.ObjectDomain;
     }
+
+    const ui64 leaderAndFollowers = 1 + Followers.size();
+    Hive.UpdateDomainTabletsTotal(oldObjectDomain, -leaderAndFollowers);
+    Hive.UpdateDomainTabletsTotal(ObjectDomain, +leaderAndFollowers);
+
+    if (IsAlive()) {
+        Hive.UpdateDomainTabletsAlive(oldObjectDomain, -1, Node->GetServicedDomain());
+        Hive.UpdateDomainTabletsAlive(ObjectDomain, +1, Node->GetServicedDomain());
+    }
+
+    for (const auto& follower : Followers) {
+        if (follower.IsAlive()) {
+            Hive.UpdateDomainTabletsAlive(oldObjectDomain, -1, follower.Node->GetServicedDomain());
+            Hive.UpdateDomainTabletsAlive(ObjectDomain, +1, follower.Node->GetServicedDomain());
+        }
+    }
 }
 
 bool TLeaderTabletInfo::InitiateAssignTabletGroups() {
@@ -127,6 +145,7 @@ TFollowerTabletInfo& TLeaderTabletInfo::AddFollower(TFollowerGroup& followerGrou
         follower.Id = followerId;
     }
     Hive.UpdateCounterTabletsTotal(+1);
+    Hive.UpdateDomainTabletsTotal(ObjectDomain, +1);
     return follower;
 }
 

ydb/core/mind/hive/monitoring.cpp

@@ -459,7 +459,15 @@ class TTxMonEvent_MemStateDomains : public TTransactionBase<THive> {
         // out << "<script>$('.container').css('width', 'auto');</script>";
         out << "<table class='table table-sortable'>";
         out << "<thead>";
-        out << "<tr><th>TenantId</th><th>Name</th><th>Hive</th><th>Status</th></tr>";
+        out << "<tr>";
+        out << "<th>TenantId</th>";
+        out << "<th>Name</th>";
+        out << "<th>Hive</th>";
+        out << "<th>Status</th>";
+        out << "<th>TabletsAliveInTenantDomain</th>";
+        out << "<th>TabletsAliveInOtherDomains</th>";
+        out << "<th>TabletsTotal</th>";
+        out << "</tr>";
         out << "</thead>";
         out << "<tbody>";
         for (const auto& [domainKey, domainInfo] : Self->Domains) {
@@ -482,6 +490,18 @@ class TTxMonEvent_MemStateDomains : public TTransactionBase<THive> {
                 out << "<td>-</td>";
                 out << "<td>-</td>";
             }
+            if (domainInfo.TabletsTotal > 0) {
+                out << "<td>" << std::round(domainInfo.TabletsAliveInObjectDomain * 100.0 / domainInfo.TabletsTotal) << "%"
+                    << " (" << domainInfo.TabletsAliveInObjectDomain << " of " << domainInfo.TabletsTotal << ")" << "</td>";
+
+                const ui64 tabletsAliveInOtherDomains = domainInfo.TabletsAlive - domainInfo.TabletsAliveInObjectDomain;
+                out << "<td>" << std::round(tabletsAliveInOtherDomains * 100.0 / domainInfo.TabletsTotal) << "%"
+                    << " (" << tabletsAliveInOtherDomains << " of " << domainInfo.TabletsTotal << ")" << "</td>";
+            } else {
+                out << "<td>-</td>";
+                out << "<td>-</td>";
+            }
+            out << "<td>" << domainInfo.TabletsTotal << "</td>";
             out << "</tr>";
         }
         out << "</tbody>";

ydb/core/mind/hive/node_info.cpp

@@ -69,6 +69,7 @@ bool TNodeInfo::OnTabletChangeVolatileState(TTabletInfo* tablet, TTabletInfo::EV
         TabletsRunningByType[tablet->GetTabletType()].erase(tablet);
         TabletsOfObject[tablet->GetObjectId()].erase(tablet);
         Hive.UpdateCounterTabletsAlive(-1);
+        Hive.UpdateDomainTabletsAlive(tablet->GetLeader().ObjectDomain, -1, GetServicedDomain());
         if (tablet->HasCounter() && tablet->IsLeader()) {
             Hive.UpdateObjectCount(tablet->AsLeader(), *this, -1);
         }
@@ -84,6 +85,7 @@ bool TNodeInfo::OnTabletChangeVolatileState(TTabletInfo* tablet, TTabletInfo::EV
         TabletsRunningByType[tablet->GetTabletType()].emplace(tablet);
         TabletsOfObject[tablet->GetObjectId()].emplace(tablet);
         Hive.UpdateCounterTabletsAlive(+1);
+        Hive.UpdateDomainTabletsAlive(tablet->GetLeader().ObjectDomain, +1, GetServicedDomain());
         if (tablet->HasCounter() && tablet->IsLeader()) {
             Hive.UpdateObjectCount(tablet->AsLeader(), *this, +1);
         }

ydb/core/mind/hive/tx__load_everything.cpp

@@ -710,7 +710,7 @@ class TTxLoadEverything : public TTransactionBase<THive> {
 
     void Complete(const TActorContext& ctx) override {
         BLOG_NOTICE("THive::TTxLoadEverything::Complete " << Self->DatabaseConfig.ShortDebugString());
-        i64 tabletsTotal = 0;
+        ui64 tabletsTotal = 0;
         for (auto it = Self->Tablets.begin(); it != Self->Tablets.end(); ++it) {
             ++tabletsTotal;
             for (const TTabletInfo& follower : it->second.Followers) {