grpc-xds/k8s/envoy/overlays/tls-cert-manager/certificate-client.yaml

# Copyright 2024 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.

# Ref: https://cert-manager.io/docs/reference/api-docs/#cert-manager.io/v1.Certificate

apiVersion: cert-manager.io/v1
kind: Certificate
metadata:
  name: envoy-client
  namespace: xds # kpt-set: ${envoy-namespace}
  labels:
    app.kubernetes.io/component: front-proxy
spec:
  commonName: envoy
  duration: 24h
  renewBefore: 8h
  dnsNames:
  - envoy
  - envoy.xds # kpt-set: control-plane.${envoy-namespace}
  - envoy.xds.svc.cluster.example.com # kpt-set: control-plane.${envoy-namespace}.svc.cluster.example.com
  uris:
  - spiffe://grpc-xds.example.com/ns/xds/sa/envoy # kpt-set: spiffe://${project-id}.svc.id.goog/ns/${envoy-namespace}/sa/envoy
  secretName: envoy-client-certs
  issuerRef:
    name: root-ca
    kind: ClusterIssuer
    group: cert-manager.io
  isCA: false
  usages:
  # https://cert-manager.io/docs/reference/api-docs/#cert-manager.io/v1.KeyUsage
  - digital signature
  - key encipherment
  - key agreement
  # https://cert-manager.io/docs/usage/certificate/#x509-key-usages-and-extended-key-usages
  - client auth
  - server auth
  privateKey:
    algorithm: ECDSA
    encoding: PKCS8
    rotationPolicy: Always
    size: 256