Troubleshooting

Common issues and solutions for 5-Spot.

Diagnostic Commands

Check Operator Status

# Operator pods
kubectl get pods -n 5spot-system

# Operator logs (JSON — pipe through jq for readability)
kubectl logs -n 5spot-system -l app=5spot-controller --tail=100 | jq .

# Plain-text logs (for quick reads without jq)
RUST_LOG_FORMAT=text kubectl logs -n 5spot-system -l app=5spot-controller --tail=100

# Detailed pod info
kubectl describe pod -n 5spot-system -l app=5spot-controller

Filter Logs by Correlation ID

Every reconciliation carries a unique reconcile_id field. Use it to isolate all log lines for a single reconciliation attempt:

# Stream logs and filter by resource name, showing reconcile_id
kubectl logs -n 5spot-system -l app=5spot-controller -f | \
  jq -c 'select(.fields.resource == "<machine-name>")'

# Trace a specific reconciliation end-to-end
kubectl logs -n 5spot-system -l app=5spot-controller | \
  jq -c 'select(.fields.reconcile_id == "<id-from-a-previous-log-line>")'

# Find all Error-phase transitions
kubectl logs -n 5spot-system -l app=5spot-controller | \
  jq -c 'select(.fields.to_phase == "Error")'

Check ScheduledMachines

# List all ScheduledMachines
kubectl get scheduledmachines -A

# Detailed status
kubectl describe scheduledmachine <name>

# Get status as JSON
kubectl get scheduledmachine <name> -o jsonpath='{.status}'

Check CAPI Machines

# List CAPI machines
kubectl get machines -A

# Describe machine
kubectl describe machine <name>

Common Issues

Machine Stuck in Pending

Symptoms:

Machine stays in Pending phase
No Machine resource created

Possible Causes:

Schedule not matching current time

# Check current time vs schedule
kubectl get scheduledmachine <name> -o jsonpath='{.spec.schedule}'
date -u  # Compare with UTC

Operator not running
```
kubectl get pods -n 5spot-system
```

RBAC permissions

kubectl auth can-i create machines --as=system:serviceaccount:5spot-system:5spot-controller

Solution:

Verify schedule matches current time and timezone
Check controller logs for errors
Ensure RBAC is correctly configured

Machine Not Removing

Symptoms:

Machine stays in Active after schedule window
Grace period seems to never complete

Possible Causes:

Pods not draining

kubectl get pods -o wide | grep <machine-name>

PodDisruptionBudget blocking eviction

PDB-blocked evictions (HTTP 429) now surface as a CapiError in the reconciler and will cause the machine to enter the Error phase. Check for blocking PDBs:

kubectl get pdb -A
# Look for PDBs with maxUnavailable: 0 or minAvailable matching current replicas
kubectl get pdb -A -o json | jq '.items[] | {name:.metadata.name, ns:.metadata.namespace, disruptions:.status.disruptionsAllowed}'

Long grace period

kubectl get scheduledmachine <name> -o jsonpath='{.spec.gracefulShutdownTimeout}'

Solution:

Check for pods that can't be evicted; look for warn log lines with "Pod eviction blocked by PDB (HTTP 429)"
Review PDB settings — temporarily scale up or relax minAvailable to allow drain
Consider using killSwitch: true for immediate removal (bypasses drain)

Schedule Not Evaluating

Symptoms:

Machine doesn't activate during schedule window
No status changes

Possible Causes:

Schedule disabled

kubectl get scheduledmachine <name> -o jsonpath='{.spec.schedule.enabled}'

Timezone mismatch

kubectl get scheduledmachine <name> -o jsonpath='{.spec.schedule.timezone}'
TZ=<timezone> date  # Check time in that timezone

Multi-instance: wrong instance handling resource

# Check which instance should handle this resource
kubectl logs -n 5spot-system -l app=5spot-controller | grep <resource-name>

Solution:

Ensure enabled: true
Verify timezone is correct
Check controller instance distribution

CAPI Integration Errors

Symptoms:

Error events on ScheduledMachine
CAPI Machine not being created

Possible Causes:

Invalid bootstrapRef or infrastructureRef

kubectl get scheduledmachine <name> -o jsonpath='{.spec.bootstrapRef}'
kubectl get <kind> <name> -n <namespace>  # Verify reference exists

CAPI provider not ready

kubectl get pods -n capi-system
kubectl get pods -n capi-kubeadm-bootstrap-system

Solution:

Verify references point to existing resources
Check CAPI provider health
Review CAPI controller logs

Reconciliation Retrying with Increasing Delay

Symptoms:

Repeated error events on a ScheduledMachine
Logs show retry_count climbing and backoff_secs growing (30 → 60 → 120 → 240 → 300)

Cause: The controller uses bounded exponential back-off. Each consecutive failure doubles the retry delay up to 300 s (5 min). The counter resets after a successful reconciliation.

# Watch the retry_count and backoff_secs fields
kubectl logs -n 5spot-system -l app=5spot-controller -f | \
  jq -c 'select(.fields.resource == "<machine-name>") | {retry: .fields.retry_count, backoff: .fields.backoff_secs, error: .fields.error}'

Solution:

Check the underlying error causing repeated failures (CAPI, schedule, validation)
Once the root cause is fixed, the next successful reconciliation resets the counter
If the resource is stuck at max backoff (300 s), fix the underlying issue and patch the resource to trigger an immediate reconcile:
```
kubectl annotate scheduledmachine <name> 5spot.finos.org/force-reconcile="$(date -u +%s)" --overwrite
```

Emergency Reclaim (Kill Switch)

See Emergency Reclaim for the full lifecycle. This section covers the diagnostic angles most operators hit in the field.

ScheduledMachine stuck in `EmergencyRemove`

Symptoms:

kubectl get scheduledmachine shows PHASE=EmergencyRemove and does not move to Disabled.
The node still appears in the cluster.

Diagnosis:

# Is the reclaim annotation still on the Node? (expected during eject, cleared at end)
kubectl get node <node-name> -o jsonpath='{.metadata.annotations}' | jq \
  'with_entries(select(.key | startswith("5spot.finos.org/reclaim")))'

# Controller logs for the emergency-remove handler
kubectl logs -n 5spot-system -l app=5spot-controller --tail=200 | \
  jq -c 'select(.fields.phase == "EmergencyRemove")'

# Events on the ScheduledMachine
kubectl describe scheduledmachine/<name> | grep -A 5 Events

Common causes:

Drain is blocked by non-evictable pods. The handler uses --force --disable-eviction, so this should be rare — if it happens, a pod is probably stuck in Terminating waiting on a finalizer of its own.
CAPI Machine deletion is blocked. Check kubectl describe machine/<machine-name> for a finalizer that has not been cleared.
Controller crashed mid-handler. On restart the annotation is still there (cleared last), so the handler will retry from the top — the operation is idempotent.

Node keeps getting ejected every schedule window

Symptom: The ScheduledMachine cycles Disabled → Pending → Active → EmergencyRemove → Disabled → ... at every schedule boundary.

Cause: The matched process is still running, the user re-enabled the schedule without quitting it first, and the agent correctly re-fired on the next poll.

Confirm:

# Check what the agent matched on
kubectl logs -n 5spot-system -l app=5spot-reclaim-agent --tail=50 | jq -c 'select(.fields.matched_pattern)'

# Check the condition reason on the ScheduledMachine
kubectl get scheduledmachine/<name> -o jsonpath='{.status.conditions}' | jq \
  '.[] | select(.reason == "EmergencyReclaimDisabledSchedule")'

Solution: Quit the matched process on the node, then re-enable:

kubectl patch scheduledmachine/<name> --type merge \
  -p '{"spec":{"schedule":{"enabled":true}}}'

If the user does not want this node in the reclaim path at all, clear killIfCommands:

kubectl patch scheduledmachine/<name> --type merge \
  -p '{"spec":{"killIfCommands":null}}'

Reclaim agent never fires on a known-matching process

Symptoms: User has a matching process running, but the Node never gets annotated.

Checklist:

Is the agent pod actually running on the node?
```
kubectl get pods -n 5spot-system -l app=5spot-reclaim-agent -o wide
```
If no pod lands on the target node, the 5spot.finos.org/reclaim-agent=enabled label is probably missing. Check the node labels:
```
kubectl get node <node-name> --show-labels | grep reclaim-agent
```
Is the per-node ConfigMap present and readable? The agent no longer mounts its config from a file — it watches the per-node ConfigMap named reclaim-agent-<NODE_NAME> in 5spot-system via the kube API and hot-reloads on every change. Check the ConfigMap directly:
```
kubectl get cm -n 5spot-system reclaim-agent-<node-name> -o jsonpath='{.data.reclaim\.toml}'
```
Missing ConfigMap → agent idles (no proc scanning) until one appears. Empty match_commands + empty match_argv_substrings = agent is armed but inert (never matches) by design. The agent logs configmap applied — rearming scanner at INFO on every observed change; tail the pod logs to confirm it sees yours:
```
kubectl logs -n 5spot-system <agent-pod> | grep configmap
```
Is the agent reading real /proc?
```
kubectl exec -n 5spot-system <agent-pod> -- ls /host/proc | head
```
Expect many numeric directory names. If you only see 1 and self, the pod's hostPID: true mount is broken — re-check the DaemonSet template.
Match is case-sensitive. match_commands = ["Java"] does not match a java process. Lowercase the pattern to match the typical JVM binary name.
The agent only reads /proc/<pid>/comm (exact basename) and /proc/<pid>/cmdline (substring). A process whose comm is java-wrapper but argv starts with /opt/jdk/bin/java ... matches on cmdline (substring), not on comm (exact).

`EmergencyReclaim` event fires but schedule is not disabled

Symptom: The EmergencyReclaim event is on the ScheduledMachine, but spec.schedule.enabled is still true.

This indicates the controller crashed between the drain/delete steps and the enabled=false PATCH. The Node annotation is cleared after the PATCH, so the controller will see the annotation on the next reconcile and retry. If it does not, check:

# Is the EmergencyReclaimDisabledSchedule event present?
kubectl get events --field-selector reason=EmergencyReclaimDisabledSchedule \
  --sort-by='.lastTimestamp'

# If yes, but spec.schedule.enabled is still true, the PATCH may have lost a race
# with a user edit. Check the generation on the ScheduledMachine:
kubectl get scheduledmachine/<name> -o jsonpath='{.metadata.generation} {.status.observedGeneration}'

Node Taints

Taints not appearing on Node

spec.nodeTaints is declared on a ScheduledMachine, the machine is Active, but the Node does not have the expected taints. Walk the NodeTainted condition on the CR first — it tells you exactly which layer is failing.

kubectl get scheduledmachine <name> \
  -o jsonpath='{.status.conditions[?(@.type=="NodeTainted")]}{"\n"}'

Three failure reasons, each with its own fix:

reason=NoNodeYet (status=Unknown) CAPI populated status.nodeRef but the Node object is not yet in the API server. This is usually a few seconds after Machine creation. The Node watch will re-enqueue us automatically — no action needed. If stuck for > 1 min, check that CAPI's Machine actually materialised the Node:

kubectl get machine <name>-machine -o jsonpath='{.status.nodeRef}{"\n"}'
kubectl get nodes <node-name>

reason=NodeNotReady (status=False) Node exists but Ready != True. Kubelet hasn't registered, networking is degraded, or CNI is failing. Look at the Node's own conditions first:

kubectl describe node <node-name> | sed -n '/Conditions:/,/Addresses:/p'

Fix the underlying Node problem; the controller will re-reconcile on the next Node Ready transition.

reason=TaintOwnershipConflict (status=False) An admin taint exists with the same (key, effect) tuple as a declared spec.nodeTaints entry. The controller refuses to overwrite admin-owned taints. Inspect the current state:

kubectl get node <node-name> -o jsonpath='{.spec.taints}{"\n"}'
kubectl get node <node-name> \
  -o jsonpath='{.metadata.annotations.5spot\.finos\.org/applied-taints}{"\n"}'

Resolve by either removing the admin taint (kubectl taint nodes <node> key:effect-) or changing the spec.nodeTaints entry so the (key, effect) no longer collides. Note: the annotation 5spot.finos.org/applied-taints lists the keys we own; any taint not in that list belongs to the admin.

reason=PatchFailed (status=False) A non-404, non-conflict API error on the Node PATCH. Check controller logs for the exact kube error (RBAC rejection, API server unreachable, etc.):

kubectl logs -n 5spot-system -l app=5spot-controller \
  | grep -E "node_taint|appliedNodeTaints"

The controller retries with exponential backoff on transient failures. For RBAC issues, confirm the controller ClusterRole grants patch on nodes.

Error Messages

"Resource not owned by this instance"

Cause: Multi-instance deployment where this resource is assigned to a different instance.

Solution: This is expected behavior. Each instance handles a subset of resources.

"Failed to evaluate schedule"

Cause: Invalid schedule configuration.

Solution: Check schedule syntax:

Days: mon-fri, not monday-friday
Hours: 9-17, not 9:00-17:00
Timezone: Valid IANA name like America/New_York

"Machine creation failed"

Cause: CAPI couldn't create the machine.

Solution:

Check CAPI logs: kubectl logs -n capi-system -l control-plane=controller-manager
Verify infrastructure provider is configured
Check bootstrap template validity

Getting Help

Collect Debug Information

# Operator version
kubectl get deployment -n 5spot-system 5spot-controller -o jsonpath='{.spec.template.spec.containers[0].image}'

# Full controller logs
kubectl logs -n 5spot-system -l app=5spot-controller --all-containers > controller-logs.txt

# ScheduledMachine YAML
kubectl get scheduledmachine <name> -o yaml > scheduledmachine.yaml

# Events
kubectl get events -A --sort-by='.lastTimestamp' > events.txt

Filing Issues

When filing a GitHub issue, include:

5-Spot version
Kubernetes version
CAPI version
Operator logs (sensitive data redacted)
ScheduledMachine YAML
Expected vs actual behavior

Configuration - Operator configuration
Monitoring - Metrics and health checks
Machine Lifecycle - Understanding phases

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Troubleshooting

Diagnostic Commands

Check Operator Status

Filter Logs by Correlation ID

Check ScheduledMachines

Check CAPI Machines

Common Issues

Machine Stuck in Pending

Machine Not Removing

Schedule Not Evaluating

CAPI Integration Errors

Reconciliation Retrying with Increasing Delay

Emergency Reclaim (Kill Switch)

ScheduledMachine stuck in `EmergencyRemove`

Node keeps getting ejected every schedule window

Reclaim agent never fires on a known-matching process

`EmergencyReclaim` event fires but schedule is not disabled

Node Taints

Taints not appearing on Node

Error Messages

"Resource not owned by this instance"

"Failed to evaluate schedule"

"Machine creation failed"

Getting Help

Collect Debug Information

Filing Issues

Related

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Troubleshooting

Diagnostic Commands

Check Operator Status

Filter Logs by Correlation ID

Check ScheduledMachines

Check CAPI Machines

Common Issues

Machine Stuck in Pending

Machine Not Removing

Schedule Not Evaluating

CAPI Integration Errors

Reconciliation Retrying with Increasing Delay

Emergency Reclaim (Kill Switch)

ScheduledMachine stuck in EmergencyRemove

Node keeps getting ejected every schedule window

Reclaim agent never fires on a known-matching process

EmergencyReclaim event fires but schedule is not disabled

Node Taints

Taints not appearing on Node

Error Messages

"Resource not owned by this instance"

"Failed to evaluate schedule"

"Machine creation failed"

Getting Help

Collect Debug Information

Filing Issues

Related

ScheduledMachine stuck in `EmergencyRemove`

`EmergencyReclaim` event fires but schedule is not disabled