deploy/kubernetes.yaml

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# Single-replica shared proxy with its state (SQLite) on one volume.
# For two or more replicas, use kubernetes-ha.yaml (middleware store in Postgres).
# Apply into whatever namespace you like: kubectl apply -n caveman -f kubernetes.yaml
apiVersion: v1
kind: Secret
metadata:
  name: caveman-proxy
type: Opaque
stringData:
  ANTHROPIC_API_KEY: REPLACE_WITH_YOUR_PROVIDER_KEY
# CAVEMAN_AUTH_TOKEN and CAVEMAN_METRICS_TOKEN are deliberately absent: any
# placeholder written here passes validation and ships as a real, guessable
# token. The auth token is this manifest's only inbound credential (clients send
# it as x-cave-api-key or Bearer), so without it the pod exits at startup on its
# default 0.0.0.0 listen. The metrics token gates /metrics, which is otherwise
# open. Generate both and put them in this same Secret BEFORE applying this file:
#   kubectl create secret generic caveman-proxy \
#     --from-literal=CAVEMAN_AUTH_TOKEN="$(openssl rand -hex 32)" \
#     --from-literal=CAVEMAN_METRICS_TOKEN="$(openssl rand -hex 32)"
# A later `kubectl apply -f kubernetes.yaml` adds the provider key beside them
# and leaves the tokens untouched.
---
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: caveman-proxy-data
spec:
  accessModes: ["ReadWriteOnce"]
  resources:
    requests:
      # Two stores are capped: the middleware store (576 MiB by default,
      # CAVEMAN_MIDDLEWARE_MAX_BYTES) and the proxy's recovery store (512 MiB,
      # CAVEMAN_CCR_MAX_BYTES). On top come SQLite indexes, free pages and the
      # WAL, the spend database (one metadata row per proxied request, never
      # capped), and 32 MiB of rotated proxy.log. 5 Gi leaves room for all of
      # it; raise it with the caps. docs/technical/deploy.md#sizing
      storage: 5Gi
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: caveman-proxy
spec:
  # One replica, deliberately, and Recreate: state is SQLite on a
  # ReadWriteOnce volume, which takes exactly one writer. A RollingUpdate would
  # start the new pod beside the old one on the same database. Need more
  # replicas or zero-downtime rollouts? Use kubernetes-ha.yaml.
  replicas: 1
  strategy:
    type: Recreate
  selector:
    matchLabels:
      app: caveman-proxy
  template:
    metadata:
      labels:
        app: caveman-proxy
    spec:
      securityContext:
        runAsNonRoot: true
        runAsUser: 65532
        # Makes the mounted PVC writable by uid 65532.
        fsGroup: 65532
        seccompProfile:
          type: RuntimeDefault
      containers:
        - name: caveman-proxy
          # Pinned by digest to the signed bin-v2.1.0 image.
          image: ghcr.io/juliusbrussee/caveman-proxy:bin-v2.1.0@sha256:da293df3c6929c7b31eba580f7af74da0448e83a55a973cca86e81041877d0bb
          imagePullPolicy: IfNotPresent
          ports:
            - containerPort: 8787
          envFrom:
            - secretRef:
                name: caveman-proxy
          env:
            # Bedrock users: set the region and give the pod's ServiceAccount
            # an IRSA role with bedrock:InvokeModel*.
            # - name: AWS_REGION
            #   value: us-east-1
            # The proxy routes record (byte-safe pass-through); the framework
            # middleware compresses for clients that ask it to.
            - name: CAVEMAN_MODE
              value: record
            - name: CAVEMAN_MIDDLEWARE_MODE
              value: compress
          volumeMounts:
            - name: data
              mountPath: /data
          # The readiness body reports "middleware":"degraded" when its store
          # cannot take a write (a full disk or a read-only volume); the check
          # allows 2 s. The pod stays ready: the provider routes still serve.
          readinessProbe:
            httpGet:
              path: /health/ready
              port: 8787
            periodSeconds: 10
            timeoutSeconds: 3
            failureThreshold: 3
          livenessProbe:
            httpGet:
              path: /health/live
              port: 8787
            initialDelaySeconds: 10
          securityContext:
            # The binary writes only under CAVEMAN_HOME=/data, which is the PVC.
            readOnlyRootFilesystem: true
            allowPrivilegeEscalation: false
            capabilities:
              drop: ["ALL"]
          resources:
            requests:
              cpu: 100m
              memory: 256Mi
            limits:
              cpu: "1"
              memory: 1Gi
      volumes:
        - name: data
          persistentVolumeClaim:
            claimName: caveman-proxy-data
---
apiVersion: v1
kind: Service
metadata:
  name: caveman-proxy
spec:
  type: ClusterIP
  selector:
    app: caveman-proxy
  ports:
    - port: 8787
      targetPort: 8787
---
# Only pods labelled caveman-client: "true" reach the proxy (label your
# Prometheus too, or add a rule for it); the proxy reaches DNS and provider APIs
# over HTTPS. EKS Pod Identity also needs egress to 169.254.170.23/32 on port 80.
# Kubelet probes are not affected.
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: caveman-proxy
spec:
  podSelector:
    matchLabels:
      app: caveman-proxy
  policyTypes: ["Ingress", "Egress"]
  ingress:
    - from:
        - podSelector:
            matchLabels:
              caveman-client: "true"
      ports:
        - port: 8787
          protocol: TCP
  egress:
    - ports:
        - port: 53
          protocol: UDP
        - port: 53
          protocol: TCP
    - ports:
        - port: 443
          protocol: TCP