Troubleshooting

Pods Stuck in Pending

The cluster may lack sufficient resources.

kubectl describe pod -n boltmcp <pod-name>

Look for events mentioning insufficient CPU or memory. Either scale the cluster or set resource requests in your values file.

CreateContainerConfigError / Missing Secret

The chart never creates the three application Secrets — pods fail with CreateContainerConfigError: secret "boltmcp-database" not found (or -oidc / -auth) until you create them. List what's actually present:

kubectl get secrets -n boltmcp

If any of boltmcp-database, boltmcp-oidc, boltmcp-auth is missing, create it per Cluster Prep → Application Secrets. Pods recover automatically on the next restart loop once the Secret exists.

CrashLoopBackOff

The application is crashing on startup. Check logs:

kubectl logs -n boltmcp <pod-name>

Common causes:

Wrong database password — the password baked into PostgreSQL on first startup must match the web-password / mcp-server-password / playground-password / keycloak-password in your boltmcp-database Secret. If you rotated a value in the Secret without resetting the corresponding DB user via ALTER USER ... PASSWORD ..., they'll diverge. Reset the password in the database or roll back the Secret value.
Missing key in a Secret — if the chart references a key that doesn't exist in the user-managed Secret (e.g. mcp-inspector-proxy-auth-token while mcpInspector.enabled=true), pods fail to start. kubectl describe pod shows the missing key. Edit the Secret to add the key, then kubectl rollout restart deployment/<service>.
Database not ready — the init container should wait, but verify the database pod is healthy.

ErrImagePull / ImagePullBackOff

Kubernetes cannot pull the container images.

kubectl describe pod -n boltmcp <pod-name>

Verify the image pull secret exists:

kubectl get secrets -n boltmcp | grep boltmcp-pull-secret

If missing, recreate it:

kubectl create secret docker-registry boltmcp-pull-secret \
  -n boltmcp \
  --docker-server=europe-west2-docker.pkg.dev \
  --docker-username=_json_key \
  --docker-password="$(cat ./key.json)"

The chart's default global.imagePullSecrets is [{ name: boltmcp-pull-secret }], so as long as the Secret exists under that name in the install namespace it will be picked up on the next pod restart (a helm upgrade is only required if you used a non-default Secret name and need to override the value).

Connection Refused

Pod not ready — check pod status with kubectl get pods -n boltmcp
Service not found — verify services exist with kubectl get svc -n boltmcp
Ingress or DNS misconfigured — bypass them with port-forwarding (see below) to confirm the pod itself is healthy

Bypass Ingress with Port-Forwarding

If the Ingress, DNS, or TLS layer is misbehaving, port-forward directly to a service to confirm the pod is responding. This is a diagnostic tool, not a normal access path.

# Web app
kubectl port-forward -n boltmcp svc/boltmcp-web 3000:3000

# Keycloak
kubectl port-forward -n boltmcp svc/boltmcp-keycloak 8080:8080

# Playground
kubectl port-forward -n boltmcp svc/boltmcp-playground 3002:3002

# MCP Server
kubectl port-forward -n boltmcp svc/boltmcp-mcp-server 3001:3001

Note: OIDC redirects will fail when accessed via localhost, since the issuer URL in the values file points at your public Keycloak hostname. Port-forwarding is useful for verifying a single service is up, not for an end-to-end auth flow.

Keycloak's admin UI is a special case: with keycloak.production.enabled: true (the default), KC_HOSTNAME is enforced, so the admin console will load briefly via localhost:8080 and then redirect you to https://auth.boltmcp.example.com. Use the public Keycloak URL for admin work; port-forwarding to Keycloak is only useful for hitting /health/ready to confirm the pod is up.

Authentication Not Working

Issuer URL Mismatch

The OIDC issuer URL must be identical in the browser and in the application pods:

kubectl describe pod <web-pod> -n boltmcp | grep OIDC

Ensure the issuer URL matches the Keycloak hostname exactly (protocol, host, port, path).

Missing Email or Name

BoltMCP requires users to have an email and first name to sign in. The auto-provisioned boltmcp_admin user gets both fields set at realm-import time (email from oidc.adminUser.email, firstName Admin). If you add more users later through the Keycloak admin console, make sure each has both fields populated before they try to sign into the BoltMCP web app.

Client Secret Mismatch

The three OIDC client secrets in the boltmcp-oidc Secret must match what's configured on the corresponding clients in Keycloak. To rotate a value:

Edit the boltmcp-oidc Secret (kubectl edit secret boltmcp-oidc -n boltmcp, or re-apply via your secrets manager) so the new value is base64-encoded under the right key (web-client-secret, mcp-server-client-secret, mcp-client-client-secret).
Update the same value on the matching client in the Keycloak admin console.
Restart deployments so they pick up the new value (Kubernetes does not auto-restart pods on Secret changes):

kubectl rollout restart -n boltmcp deployment/boltmcp-web
kubectl rollout restart -n boltmcp deployment/boltmcp-playground
kubectl rollout restart -n boltmcp deployment/boltmcp-mcp-server

kubectl describe certificate boltmcp-tls -n boltmcp
kubectl get challenges -n boltmcp

Common causes:

DNS not propagated — verify with nslookup web.boltmcp.example.com
HTTP-01 challenge failed — ensure NGINX ingress is running and accessible
Rate limited — use the staging ClusterIssuer for testing

Large Header Errors

If Keycloak produces "upstream sent too big header" errors, increase the buffer:

annotations:
  nginx.ingress.kubernetes.io/proxy-buffer-size: "256k"

Database lost+found Error

If the database pod logs show:

initdb: error: directory "/var/lib/postgresql/data" exists but is not empty
initdb: detail: It contains a lost+found directory

The PVC must be recreated:

helm uninstall boltmcp -n boltmcp
kubectl delete pvc data-boltmcp-database-0 -n boltmcp

helm install boltmcp \
  oci://europe-west2-docker.pkg.dev/boltmcp-platform/boltmcp-alpha/charts/boltmcp \
  --version ${BOLTMCP_VERSION} \
  -n boltmcp \
  -f values-prod.yaml

Diagnostic Commands

# Pod status
kubectl get pods -n boltmcp

# Pod logs
kubectl logs -n boltmcp <pod-name>

# Pod events and details
kubectl describe pod -n boltmcp <pod-name>

# Services and endpoints
kubectl get svc -n boltmcp
kubectl get endpoints -n boltmcp

# Secrets
kubectl get secrets -n boltmcp

# Helm release status
helm list -n boltmcp
helm status boltmcp -n boltmcp

# Certificate status (if using Ingress)
kubectl get certificates -n boltmcp
kubectl get challenges -n boltmcp

# Ingress status
kubectl get ingress -n boltmcp

# NGINX Ingress logs
kubectl logs -n ingress-nginx -l app.kubernetes.io/name=ingress-nginx