apiVersion: apps/v1
kind: Deployment
metadata:
  name: signing-service
  namespace: agent-trust
  labels:
    app.kubernetes.io/name: signing-service
    app.kubernetes.io/part-of: proofedmesh
    app.kubernetes.io/component: trust-core
spec:
  replicas: 2
  revisionHistoryLimit: 5
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 0
  selector:
    matchLabels:
      app.kubernetes.io/name: signing-service
  template:
    metadata:
      labels:
        app.kubernetes.io/name: signing-service
        app.kubernetes.io/part-of: proofedmesh
        app.kubernetes.io/component: trust-core
    spec:
      serviceAccountName: signing-service
      # The signing-service MUST NOT get the default auto-mounted token
      # because we need a projected token with an explicit `trust-api`
      # audience so the pod SA token can be used to call the API server
      # for TokenReview (the audience on the pod's own SA token is what
      # the K8s API server will accept as Bearer credential).
      automountServiceAccountToken: false
      securityContext:
        runAsNonRoot: true
        runAsUser: 65532
        runAsGroup: 65532
        fsGroup: 65532
        seccompProfile:
          type: RuntimeDefault
      containers:
        - name: signing-service
          image: harbor.basicstack.de/basicstack/signing-service:dev
          imagePullPolicy: IfNotPresent
          args:
            - "-listen=:8081"
            - "-backend=memory"
            - "-keys=trust-api/approval-signer-2026-q4,trust-api/agent-testagent-transform-2026-q4"
            - "-keys-from-env"
            - "-pocket-id-issuer=$(POCKET_ID_ISSUER)"
            - "-pocket-id-audience=$(POCKET_ID_AUDIENCE)"
            - "-k8s-tokenreview=on"
            - "-registry-dsn=$(TRUST_PG_DSN)"
            - "-policy-bundle=/etc/signing-service/policies/signing_service.rego"
          env:
            # ---- Pocket-ID OIDC discovery (DEV-609) ----
            - name: POCKET_ID_ISSUER
              valueFrom:
                secretKeyRef:
                  name: signing-service-prod
                  key: POCKET_ID_ISSUER
            - name: POCKET_ID_AUDIENCE
              valueFrom:
                secretKeyRef:
                  name: signing-service-prod
                  key: POCKET_ID_AUDIENCE
            # ---- trust-api agent registry DSN (DEV-609) ----
            - name: TRUST_PG_DSN
              valueFrom:
                secretKeyRef:
                  name: signing-service-prod
                  key: TRUST_PG_DSN
            # ---- Signing keys (same shape as dev; swapped to prod Secret) ----
            - name: KEY_TRUST_API_APPROVAL_SIGNER_2026_Q4
              valueFrom:
                secretKeyRef:
                  name: signing-service-prod
                  key: KEY_TRUST_API_APPROVAL_SIGNER_2026_Q4
            - name: KEY_TRUST_API_AGENT_TESTAGENT_TRANSFORM_2026_Q4
              valueFrom:
                secretKeyRef:
                  name: signing-service-prod
                  key: KEY_TRUST_API_AGENT_TESTAGENT_TRANSFORM_2026_Q4
          ports:
            - name: http
              containerPort: 8081
              protocol: TCP
          readinessProbe:
            httpGet:
              path: /healthz
              port: http
            initialDelaySeconds: 2
            periodSeconds: 10
            failureThreshold: 3
          livenessProbe:
            httpGet:
              path: /healthz
              port: http
            initialDelaySeconds: 10
            periodSeconds: 20
            failureThreshold: 3
          resources:
            requests:
              cpu: "100m"
              memory: "128Mi"
            limits:
              cpu: "1000m"
              memory: "512Mi"
          securityContext:
            allowPrivilegeEscalation: false
            readOnlyRootFilesystem: true
            capabilities:
              drop:
                - ALL
          volumeMounts:
            - name: kube-api-token
              mountPath: /var/run/secrets/kubernetes.io/serviceaccount
              readOnly: true
            - name: opa-policy
              mountPath: /etc/signing-service/policies
              readOnly: true
      volumes:
        # Projected SA token the signing-service presents to the
        # Kubernetes API server to authorize TokenReview calls. The
        # projected volume also carries the API server CA, which the
        # in-cluster TokenReviewer loads from
        # /var/run/secrets/kubernetes.io/serviceaccount/ca.crt.
        - name: kube-api-token
          projected:
            sources:
              - serviceAccountToken:
                  path: token
                  # The API server audience — pod-SA tokens addressed to
                  # the api server are what RBAC checks against.
                  audience: "https://kubernetes.default.svc"
                  expirationSeconds: 3600
              - configMap:
                  name: kube-root-ca.crt
                  items:
                    - key: ca.crt
                      path: ca.crt
              - downwardAPI:
                  items:
                    - path: namespace
                      fieldRef:
                        fieldPath: metadata.namespace
        # OPA Rego policy source, mounted read-only. The ConfigMap is
        # created from policies/sinks/signing_service.rego by GitOps
        # (see deploy/signing-service/README.md).
        - name: opa-policy
          configMap:
            name: signing-service-policy
            items:
              - key: signing_service.rego
                path: signing_service.rego
      topologySpreadConstraints:
        - maxSkew: 1
          topologyKey: kubernetes.io/hostname
          whenUnsatisfiable: ScheduleAnyway
          labelSelector:
            matchLabels:
              app.kubernetes.io/name: signing-service