apiVersion: apps/v1
kind: Deployment
metadata:
  name: worker
  namespace: honeydue
  labels:
    app.kubernetes.io/name: worker
    app.kubernetes.io/part-of: honeydue
spec:
  # Asynq's Scheduler is a singleton — running >1 replica fires every cron
  # task once per replica (duplicate daily digests, onboarding emails, etc.).
  # Keep at 1 until asynq.PeriodicTaskManager with Redis leader election is
  # wired in cmd/worker/main.go.
  replicas: 1
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxUnavailable: 0
      maxSurge: 1
  selector:
    matchLabels:
      app.kubernetes.io/name: worker
  template:
    metadata:
      labels:
        app.kubernetes.io/name: worker
        app.kubernetes.io/part-of: honeydue
    spec:
      serviceAccountName: worker
      # Explicit pod-level opt-out (audit F11) — defense-in-depth on top of
      # the ServiceAccount-level setting in rbac.yaml.
      automountServiceAccountToken: false
      imagePullSecrets:
        - name: gitea-credentials
      securityContext:
        runAsNonRoot: true
        runAsUser: 1000
        runAsGroup: 1000
        fsGroup: 1000
        seccompProfile:
          type: RuntimeDefault
      containers:
        - name: worker
          image: IMAGE_PLACEHOLDER  # Replaced by 03-deploy.sh
          imagePullPolicy: IfNotPresent  # audit CODE-L4 — explicit; images are SHA/digest-pinned
          ports:
            # health + Prometheus /metrics (in-cluster only; scraped by vmagent)
            - name: metrics
              containerPort: 6060
              protocol: TCP
          securityContext:
            allowPrivilegeEscalation: false
            readOnlyRootFilesystem: true
            capabilities:
              drop: ["ALL"]
          envFrom:
            - configMapRef:
                name: honeydue-config
          # Audit CODE-F8: secrets are NOT injected as environment variables.
          # Env vars are readable for the life of the pod via /proc/<pid>/environ
          # and leak into crash dumps / child processes. honeydue-secrets is
          # mounted read-only at /etc/honeydue/secrets (mode 0400) and the Go
          # config layer (config.loadFileSecrets) reads each key from its file.
          # Non-secret config still arrives via the configMapRef above.
          volumeMounts:
            - name: app-secrets
              mountPath: /etc/honeydue/secrets
              readOnly: true
            - name: apns-key
              mountPath: /secrets/apns
              readOnly: true
            - name: tmp
              mountPath: /tmp
          resources:
            requests:
              cpu: 100m
              memory: 128Mi
            limits:
              cpu: 500m
              memory: 512Mi
          livenessProbe:
            exec:
              command: ["pgrep", "-f", "/app/worker"]
            initialDelaySeconds: 15
            periodSeconds: 30
            timeoutSeconds: 5
      volumes:
        # Audit CODE-F8: the whole honeydue-secrets Secret, projected as files.
        # defaultMode 0400 → readable only by the container's runAsUser (1000).
        - name: app-secrets
          secret:
            secretName: honeydue-secrets
            defaultMode: 0400
        - name: apns-key
          secret:
            secretName: honeydue-apns-key
            items:
              - key: apns_auth_key.p8
                path: apns_auth_key.p8
        - name: tmp
          emptyDir:
            sizeLimit: 64Mi
---
# Allow vmagent to scrape the worker's /metrics on :6060 (default-deny-all is in
# force; the worker otherwise receives no ingress). Additive — see node-exporter.
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-ingress-to-worker-metrics
  namespace: honeydue
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: worker
  policyTypes:
    - Ingress
  ingress:
    - from:
        - podSelector:
            matchLabels:
              app.kubernetes.io/name: vmagent
      ports:
        - port: 6060
          protocol: TCP
---
# vmagent's base egress policy only opens :8000/:8080 to the pod CIDR; this
# additive policy opens :6060 for the worker scrape (leaves the base untouched).
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-egress-from-vmagent-to-worker
  namespace: honeydue
spec:
  podSelector:
    matchLabels:
      app.kubernetes.io/name: vmagent
  policyTypes:
    - Egress
  egress:
    - to:
        - ipBlock:
            cidr: 10.42.0.0/16
      ports:
        - port: 6060
          protocol: TCP