grpc-xds/k8s/cert-manager/root-ca/root-ca-certificate.yaml

# Copyright 2023 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# The self-signed root CA certificate.
# Ref: https://cert-manager.io/docs/reference/api-docs/#cert-manager.io/v1.Certificate

apiVersion: cert-manager.io/v1
kind: Certificate
metadata:
  name: root-ca
  # https://cert-manager.io/docs/configuration/#cluster-resource-namespace
  namespace: cert-manager
  labels:
    app.kubernetes.io/component: cert-manager
spec:
  subject:
    organizations:
    - Example LLC
  commonName: root-ca
  duration: 8760h # 365d, see https://pkg.go.dev/time#ParseDuration
  renewBefore: 720h # 30d
  dnsNames:
  - root-ca
  uris:
  # https://github.com/spiffe/spiffe/blob/27b59b81ba8c56885ac5d4be73b35b9b3305fd7a/standards/X509-SVID.md#32-signing-certificates
  - spiffe://grpc-xds.example.com # kpt-set: spiffe://${project-id}.svc.id.goog
  secretName: root-ca-certificate
  issuerRef:
    name: selfsigned
    kind: Issuer
    group: cert-manager.io
  isCA: true
  usages:
  # https://cert-manager.io/docs/reference/api-docs/#cert-manager.io/v1.KeyUsage
  # https://cloud.google.com/certificate-authority-service/docs/certificate-profile#root-unconstrained
  # https://github.com/spiffe/spiffe/blob/27b59b81ba8c56885ac5d4be73b35b9b3305fd7a/standards/X509-SVID.md#43-key-usage
  - cert sign
  - crl sign
  privateKey:
    algorithm: ECDSA
    encoding: PKCS8
    rotationPolicy: Always
    size: 256