部署 SPIRE workload identity 基础设施

clusters/homelab/README.md

@@ -50,4 +50,6 @@ sudo k3s kubectl -n flux-system get gitrepositories,kustomizations
 - VictoriaMetrics Operator 已固定现有 chart `0.66.2` 并完成分阶段 Flux HelmRelease
   接管；Metrics、Logs、Traces 与 Grafana 也已统一完成 Flux 接管；
 - External Secrets Operator 已固定 chart `2.8.0` 并完成分阶段接管；
+- SPIRE 已按官方 hardened chart `0.30.2`（SPIRE `1.15.3`）声明，使用共享
+  PostgreSQL 与独立 signing-key PVC；首次上线和 OpenBao JWT-SVID PoC 尚待合并后验证；
 - root Kustomization 与所有 brownfield 子 Kustomization 继续保持 `prune: false`。

clusters/homelab/apps/spire.yaml

@@ -0,0 +1,14 @@
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: spire
+  namespace: flux-system
+spec:
+  interval: 10m
+  path: ./platform/spire
+  prune: false
+  sourceRef:
+    kind: GitRepository
+    name: flux-system
+  timeout: 15m
+  wait: false

clusters/homelab/kustomization.yaml

@@ -10,4 +10,5 @@ resources:
   - apps/gitea-actions.yaml
   - apps/http-echo.yaml
   - apps/openebs.yaml
+  - apps/spire.yaml
   - apps/observability.yaml

platform/spire/README.md

@@ -0,0 +1,80 @@
+# SPIFFE/SPIRE workload identity
+
+SPIRE 是 homelab 的机器与 workload identity 根。人类身份继续由 Samba AD 与
+Authelia 提供；SPIRE 不替代人类 OIDC，也不承担目标服务的资源授权。
+
+## 部署范围
+
+Flux 安装 SPIFFE hardened charts：
+
+- `spire-crds` `0.6.1`；
+- `spire` `0.30.2`（SPIRE `1.15.3`）；
+- SPIRE Server、Agent、Controller Manager、SPIFFE CSI Driver；
+- OIDC Discovery Provider。
+
+未启用 Tornjak、SPIRE Identity Exchange、SPIKE、federation、Delegated Identity
+API 或 Broker API。Trust domain 是 `ddupan.top`，Kubernetes cluster name 是
+`homelab`。
+
+## PostgreSQL bootstrap
+
+SPIRE registration datastore 使用共享 CloudNativePG：
+
+```text
+host:     shared-postgresql-rw.shared-db.svc.cluster.local:5432
+database: spire
+role:     spire
+```
+
+数据库与 role 当前是手工创建的临时 bootstrap。密码只存在于
+`spire-server/spire-postgresql` Secret 的 `password` key 中，不提交到 Git。
+在 PostgreSQL tenant operator/DBaaS 接管前，不得删除该 Secret 或重置数据库
+role 密码。
+
+后续声明式管理必须保持这一 Secret 接口，或者在同一个变更中更新
+`spire-server.dataStore.sql.externalSecret`，避免数据库凭据出现两个写入方。
+
+PostgreSQL保存 registration state；SPIRE Server 的 disk KeyManager 仍使用一个
+`1Gi`、`localpv-zfs-ceph` PVC 保存 trust-domain signing keys。数据库备份不能替代
+该 PVC/密钥的备份。
+
+## 身份签发策略
+
+默认的全 Pod fallback `ClusterSPIFFEID` 已关闭。新增 workload 必须显式创建
+`ClusterSPIFFEID`，并以 namespace、ServiceAccount、Pod label 等 selector 收窄。
+不得仅因 Pod 能挂载 CSI socket 就给它签发身份。
+
+稳定的 JWT issuer 预留为：
+
+```text
+https://spire-oidc.ad.ddupan.top
+```
+
+首次部署时 OIDC Discovery Provider 仅为 ClusterIP，内部为明文 HTTP；尚未创建
+外部 DNS 或 Gateway route。接入 OpenBao 前，在现有 Envoy Gateway 上终止 TLS、
+增加内网 DNS，并验证 discovery document 的 `issuer` 与上述 URL 完全一致。
+
+## 首次部署与验证
+
+合并后观察：
+
+```bash
+sudo k3s kubectl -n flux-system get kustomization spire
+sudo k3s kubectl -n spire-mgmt get helmrelease
+sudo k3s kubectl -n spire-server get pods,pvc
+sudo k3s kubectl -n spire-system get daemonset,pods
+```
+
+必须先确认 `spire-crds` Ready，随后 `spire` Ready。SPIRE Server 应连接 PostgreSQL，
+Agent 应通过 PSAT attestation 注册，CSI Driver 应在节点 Ready。
+
+首个业务验收另行增加一个专用测试 Pod 与 `ClusterSPIFFEID`，验证取得
+`aud=openbao` 的 JWT-SVID 后登录 OpenBao。PoC 完成前不修改生产认证方式。
+
+## 恢复边界
+
+- 恢复顺序：共享 PostgreSQL、SPIRE Server signing-key PVC、SPIRE Server、Agent；
+- issuer URL 与 trust domain 初始化后不得随意修改；
+- 丢失 signing keys 会使既有 SVID 和下游 JWKS 信任失效；
+- PostgreSQL或 SPIRE 不可用时，不得用新的空数据库覆盖现有状态；
+- 当前 Flux root 与本 Kustomization 均保持 `prune: false`，删除资源需单独审计。

platform/spire/helmrelease-crds.yaml

@@ -0,0 +1,30 @@
+apiVersion: helm.toolkit.fluxcd.io/v2
+kind: HelmRelease
+metadata:
+  name: spire-crds
+  namespace: spire-mgmt
+spec:
+  chart:
+    spec:
+      chart: spire-crds
+      interval: 1h
+      sourceRef:
+        kind: HelmRepository
+        name: spiffe-hardened
+      version: 0.6.1
+  driftDetection:
+    mode: enabled
+  install:
+    crds: CreateReplace
+    strategy:
+      name: RetryOnFailure
+      retryInterval: 5m
+  interval: 30m
+  releaseName: spire-crds
+  targetNamespace: spire-mgmt
+  timeout: 10m
+  upgrade:
+    crds: CreateReplace
+    strategy:
+      name: RetryOnFailure
+      retryInterval: 5m

platform/spire/helmrelease.yaml

@@ -0,0 +1,34 @@
+apiVersion: helm.toolkit.fluxcd.io/v2
+kind: HelmRelease
+metadata:
+  name: spire
+  namespace: spire-mgmt
+spec:
+  chart:
+    spec:
+      chart: spire
+      interval: 1h
+      sourceRef:
+        kind: HelmRepository
+        name: spiffe-hardened
+      version: 0.30.2
+  dependsOn:
+    - name: spire-crds
+      namespace: spire-mgmt
+  driftDetection:
+    mode: enabled
+  install:
+    strategy:
+      name: RetryOnFailure
+      retryInterval: 5m
+  interval: 30m
+  releaseName: spire
+  targetNamespace: spire-mgmt
+  timeout: 15m
+  upgrade:
+    strategy:
+      name: RetryOnFailure
+      retryInterval: 5m
+  valuesFrom:
+    - kind: ConfigMap
+      name: spire-values

platform/spire/helmrepository.yaml

@@ -0,0 +1,8 @@
+apiVersion: source.toolkit.fluxcd.io/v1
+kind: HelmRepository
+metadata:
+  name: spiffe-hardened
+  namespace: spire-mgmt
+spec:
+  interval: 1h
+  url: https://spiffe.github.io/helm-charts-hardened/

platform/spire/kustomization.yaml

@@ -0,0 +1,16 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+generatorOptions:
+  disableNameSuffixHash: true
+  labels:
+    reconcile.fluxcd.io/watch: Enabled
+configMapGenerator:
+  - name: spire-values
+    namespace: spire-mgmt
+    files:
+      - values.yaml=values.yaml
+resources:
+  - namespaces.yaml
+  - helmrepository.yaml
+  - helmrelease-crds.yaml
+  - helmrelease.yaml

platform/spire/namespaces.yaml

@@ -0,0 +1,14 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: spire-mgmt
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: spire-server
+---
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: spire-system

platform/spire/values.yaml

@@ -0,0 +1,103 @@
+global:
+  k8s:
+    clusterDomain: cluster.local
+  spire:
+    clusterName: homelab
+    trustDomain: ddupan.top
+    # This is a stable external identity even before its Gateway route is added.
+    # Changing the issuer after consumers trust it would invalidate their config.
+    jwtIssuer: https://spire-oidc.ad.ddupan.top
+    caSubject:
+      country: CN
+      organization: ddupan homelab
+      commonName: ddupan.top
+    namespaces:
+      create: false
+      system:
+        name: spire-system
+      server:
+        name: spire-server
+    recommendations:
+      enabled: true
+      namespaceLayout: true
+      namespacePSS: true
+      priorityClassName: true
+      strictMode: true
+      securityContexts: true
+      prometheus: false
+
+spire-server:
+  kind: statefulset
+  replicaCount: 1
+  auditLogEnabled: true
+  persistence:
+    # PostgreSQL stores registrations, but the disk KeyManager still needs durable
+    # storage for the trust-domain signing keys.
+    type: pvc
+    size: 1Gi
+    accessMode: ReadWriteOnce
+    storageClass: localpv-zfs-ceph
+  dataStore:
+    sql:
+      databaseType: postgres
+      databaseName: spire
+      host: shared-postgresql-rw.shared-db.svc.cluster.local
+      port: 5432
+      username: spire
+      options:
+        - sslmode: require
+      externalSecret:
+        enabled: true
+        name: spire-postgresql
+        key: password
+      maxOpenConns: 20
+      maxIdleConns: 2
+      connMaxLifetime: 30m
+  controllerManager:
+    enabled: true
+    # Identities are opt-in. Do not issue a fallback SVID to every pod in the
+    # cluster merely because it can mount the Workload API socket.
+    identities:
+      clusterSPIFFEIDs:
+        default:
+          enabled: false
+        test-keys:
+          enabled: false
+
+spire-agent:
+  nodeAttestor:
+    k8sPSAT:
+      enabled: true
+  workloadAttestors:
+    k8s:
+      enabled: true
+    unix:
+      enabled: false
+
+spiffe-csi-driver:
+  enabled: true
+
+spiffe-oidc-discovery-provider:
+  enabled: true
+  # TLS will terminate at the existing Envoy Gateway when the stable issuer is
+  # exposed. The service remains ClusterIP-only during the first deployment.
+  tls:
+    spire:
+      enabled: false
+    externalSecret:
+      enabled: false
+    certManager:
+      enabled: false
+
+upstream:
+  enabled: false
+tornjak-frontend:
+  enabled: false
+spire-identity-exchange:
+  enabled: false
+spike-keeper:
+  enabled: false
+spike-nexus:
+  enabled: false
+spike-pilot:
+  enabled: false