# Troubleshoot the Kubernetes Operator Diagnose Operator and QuestDB cluster conditions, events, logs, and object-store configuration. # Troubleshooting Diagnose from the API outward. Avoid deleting pods, PVCs, or promotion objects until status and events have been captured. Before running any command, replace every `` value; an unreplaced placeholder can be interpreted as shell redirection. ## First response 1. **Generation:** confirm `.metadata.generation == .status.observedGeneration`. 2. **Conditions:** read every status, reason, message, and condition generation. 3. **Events:** inspect the cluster and namespace event timeline. 4. **Kubernetes objects:** inspect pods, PVCs, Services, endpoints, nodes, and scheduling. 5. **Logs:** then read operator logs and the relevant QuestDB/init-container logs. ```sh kubectl get questdbcluster -n \ -o jsonpath='generation={.metadata.generation}{" observed="}{.status.observedGeneration}{" phase="}{.status.phase}{"\n"}{range .status.conditions[*]}{.type}{"="}{.status}{" reason="}{.reason}{" observed="}{.observedGeneration}{" message="}{.message}{"\n"}{end}' kubectl describe questdbcluster -n kubectl get events -n --sort-by=.metadata.creationTimestamp kubectl get pods,services -n -l questdb.io/cluster= -o wide kubectl get pvc -n -l questdb.io/cluster= \ -L questdb.io/role,questdb.io/bootstrap -o wide kubectl get endpointslice -n \ -l kubernetes.io/service-name=-rw kubectl get endpointslice -n \ -l kubernetes.io/service-name=-ro ``` If status is stale, check manager readiness, logs, RBAC, webhook/API connectivity, and events in `questdb-operator-system` before diagnosing an old condition. ## Decision table | Signal or symptom | Meaning | Next checks | | --- | --- | --- | | `ConfigRejected=True` | An engine setting is invalid, injection-prone, or operator-owned. | Read reason/message; remove the rejected key from `spec.config` or `spec.replication.config`. Compare with [Configuration](/docs/enterprise-kubernetes-operator/configuration/#extra-engine-options). | | `OperatorIdentityReady=False` | The operator could not provision/converge its least-privilege `questdb_operator` **SQL service account** from the admin identity. It is not cloud or object-store identity. | Check QuestDB pgwire reachability, admin Secret name/keys/permissions, ACL settings, and the condition reason. `WaitingForInstance` and brief `QuestDBUnreachable` can be boot states; persistent `AdminInsufficient` needs credential/privilege correction. | | `WriteHealthy=False/PrimaryNotReady` | The primary is not Ready, so WAL write health cannot be established. | Diagnose primary Pod readiness, scheduling, mounts, probes, resources, and logs. Do not infer healthy writes from a read-serving replica or `Available=True`. | | `WriteHealthy=False/PrimarySuspended` | One or more named primary WAL tables are write-impaired; reads and other tables can remain available. | Read the condition message for every table; inspect `wal_tables()`, QuestDB logs, table/disk state, and application errors. `Available=True` does not override this failure. | | `WriteHealthy=Unknown` | Operator identity is not ready, or the latest `wal_tables()` query/observation was unavailable or failed. | Read reason/message; check operator SQL identity, pgwire reachability, and logs. Do not infer healthy writes from `Available=True`. | | `BackupHealthy=Unknown` | No observed backup yet, an engine run is still progressing within its threshold, or configuration cannot be observed. | Confirm schedule, `status.backup.configured`, `lastBackup.status`, `lastProgressAt`, manager observation delay, store config, and primary logs. | | `BackupHealthy=False/Failed` | Latest observed engine backup run failed. | Read `.status.backup.lastBackup.error`; check pod identity/static Secret, prefix permissions, DNS/network, and provider service health. | | `BackupHealthy=False/Stalled` | The engine run remains `in_progress`, but `progressPercent` has not changed since `lastProgressAt` for `stalledAfterSeconds`. | Inspect `lastBackup`, `lastProgressAt`, database logs, IAM/Secret, network, and object-store health. Default threshold is 3600 seconds; explicit `0` disables detection and does not cancel the run. | | `ReplicationHealthy=False` or `Unknown` | Replicas are suspended, behind, unreachable, unseeded, or freshness was not determined. | Inspect `.status.replication.seed`, `replicas[]`, `caughtUpNow`, `lagTxns`, and `suspendedTables`; then database metrics/logs and object-store access. Absent freshness is not zero lag. | | `InstanceUnreachable=True` | Operator cannot safely observe an instance, or its node is unreachable. | Inspect pod readiness, node Ready condition, pgwire/metrics network paths, probes, CPU/memory pressure, and logs. Do not force-create another primary. | | `PromotionRequired=True` | Established primary PVC is missing/Terminating; the operator fences its Pod, refuses an empty replacement, preserves `currentPrimary`, and does not auto-promote. | Confirm PVC/PV/cloud-disk and zero ready RW endpoints. Restore the volume or select a replica and follow [promotion and failover](/docs/enterprise-kubernetes-operator/high-availability/#promotion-and-failover), accepting emergency loss when a drain is impossible. | | `Recovered=True` | Engine reported restore completion. | Still validate actual tables, timestamps, and row counts before traffic. | | `RecoveryFailed=True` | Restore init/runtime failed or was incomplete. | Read reason/message and genesis init logs; verify source store/root/instance/target. `spec.bootstrap` is immutable, so correct it in a fresh destination. | | `StorageResizeBlocked=True` | StorageClass/CSI expansion is unavailable. | Confirm `allowVolumeExpansion`, driver support, PVC events, and requested size. Never shrink; restore to a new class if needed. | | Promotion `Pending`/`Validating` | Request awaits acceptance, catch-up, or drain prerequisites. | Read `.status.reason/message`, active promotion, target live status, and `caughtUpNow`. A request left Pending for 10 minutes becomes `StaleRequest`. | | Promotion `Draining` | Old primary is stopping writes and uploading its tail, or target is replaying it. | Check old-primary and target logs. A live hung upload is not automatically timed out; decide whether to continue or explicitly escalate with data-loss acceptance. | | Promotion `Promoting` | Target has been shaped as primary but has not served yet. | Diagnose target image, scheduling, PVC mount, Secret, network, and store access. This phase and its deletion finalizer are unbounded. | | Promotion `Failed` | One-shot cutover ended. | Read `.status.reason` and `.status.message`; correct the cause and create a new promotion name. Do not patch the terminal object. | | `ImagePullBackOff` / `ErrImagePull` | Kubelet cannot pull operator or QuestDB image. | Check the correct namespace's imagePullSecret metadata, repository/tag, node registry reachability, and entitlement. Operator and database pull credentials are separate. | | PVC `Pending` | No matching volume can bind. | Describe PVC; check StorageClass, topology, quota, CSI controller, capacity, and cloud events. | | Primary PVC `Terminating` | Deletion is in progress; a mounted same-name primary Pod may hold `pvc-protection`. | Do not remove the finalizer. Current versions fence an established primary Pod automatically. Watch for the Pod to terminate, the old PVC UID to disappear, `PromotionRequired=True`, and zero ready RW endpoints. | | Pod `Pending` | Scheduler or volume attachment cannot place it. | Describe pod; check requests, taints/tolerations, affinity, topology, PDB context, PVC binding, and single-node disk attachment. | | Store Secret/IAM/network error | QuestDB pod cannot read/write object storage. | Confirm the `QuestDBObjectStore` provider fields, referenced Secret **names and keys** (not values), pod cloud identity, prefix-level IAM, DNS, HTTPS egress, endpoint, region/account, and provider audit logs. | | Follower has no primary, no `WriteHealthy`, and `-rw` has no endpoints | Healthy follower behavior when `.status.replication.following=true`. | Do not wait for `WriteHealthy`; use `-ro` for reads and complete the migration cutover when ready. | ## Primary PVC deletion and fencing For an established replicated primary, missing or Terminating storage is a fence condition. This includes the Pod-delete → replacement → PVC-delete race: the replacement may become Ready on the old PVC before deletion starts, but the current operator then deletes that Pod so Kubernetes can release the claim. Do not keep waiting indefinitely, create a same-name PVC manually, remove `pvc-protection`, or send clients directly to the Pod. Watch identities and routing with bounded commands: ```sh kubectl get questdbcluster -n \ -o jsonpath='currentPrimary={.status.currentPrimary}{" PromotionRequired="}{.status.conditions[?(@.type=="PromotionRequired")].status}{"/"}{.status.conditions[?(@.type=="PromotionRequired")].reason}{"\n"}' kubectl get pod -n \ -o custom-columns='NAME:.metadata.name,UID:.metadata.uid,DELETING:.metadata.deletionTimestamp' kubectl get pvc -n \ -o custom-columns='NAME:.metadata.name,UID:.metadata.uid,ROLE:.metadata.labels.questdb\.io/role,BOOTSTRAP:.metadata.labels.questdb\.io/bootstrap,DELETING:.metadata.deletionTimestamp' kubectl get endpointslice -n \ -l kubernetes.io/service-name=-rw -o yaml ``` The fenced state keeps a non-empty `status.currentPrimary` as the primary of record but has no ready RW endpoint and no replacement primary PVC. Recover the original storage if possible; otherwise select a live replica and make the explicit Emergency decision. After promotion, verify `WriteHealthy=True/Healthy`, exactly one live primary, target PVC `questdb.io/role=primary`, and final replica PVCs `questdb.io/role=replica`. `questdb.io/bootstrap` remains ancestry/state and must not be used as current role. ## Inspect logs Operator logs: ```sh kubectl logs -n questdb-operator-system \ deployment/questdb-operator-controller-manager \ -c manager --since=30m --tail=1000 ``` Database and prior-crash logs: ```sh kubectl logs -n -c questdb --since=30m --tail=1000 kubectl logs -n -c questdb \ --previous --tail=500 kubectl get pod -n \ -o jsonpath='{.spec.initContainers[*].name}{"\n"}' kubectl logs -n \ -c --tail=500 ``` Do not paste credentials from logs or custom resources into a shared ticket. Redact according to your policy. ## Object-store configuration has no readiness status `QuestDBObjectStore` is a validated configuration holder, not a managed bucket/container and not a probe controller. It has no status condition to wait for. Diagnose it through the consuming cluster's `BackupHealthy`, `ReplicationHealthy`, or recovery conditions and through QuestDB pod logs, cloud identity/audit logs, and network tests. The operator itself has no object-store permissions and cannot list or clean the store. If the cause remains unclear, collect the [support bundle](/docs/enterprise-kubernetes-operator/support/#collect-a-support-bundle) before changing the failing resources.