一、安装 cert-manager
OpenTelemetry Operator 提供了 OpenTelemetryCollector CRD（自定义资源定义），能自动处理服务发现和 RBAC（基于角色的访问控制）
该 Operator 需要 cert-manager 来支持准入 Webhook，部署步骤如下：

安装OpenTelemetry Operator 自定义资源，需先部署 cert-manager ，使用yaml 直接部署，文件：02-cert-manager.yaml (官方文档里)
官方文档链接：https://cert-manager.io/docs/installation/kubectl/

cert-manager 将安装在cert-manager命名空间中，安装了cert-manager后，通过以下方式验证其部署是否正确 检查cert-manager命名空间: 
kubectl get pods --namespace cert-manager
NAME                                       READY   STATUS    RESTARTS   AGE
cert-manager-7b8b89f89d-tpchr              1/1     Running   0          24s
cert-manager-cainjector-7f9fdd5dd5-px66h   1/1     Running   0          25s
cert-manager-webhook-769f6b94cb-zmjmv      1/1     Running   0          24s



二、安装 OpenTelemetry Operator
使用 helm 安装OpenTelemetry ，添加 Operator helm 仓库、更新、安装：
helm repo add open-telemetry https://open-telemetry.github.io/opentelemetry-helm-charts
helm repo update
helm install opentelemetry-operator open-telemetry/opentelemetry-operator \
  --namespace opentelemetry-operator \
  --create-namespace

或者直接使用yaml部署：文件 03-opentelemetry-operator.yaml
kubectl apply -f https://github.com/open-telemetry/opentelemetry-operator/releases/latest/download/opentelemetry-operator.yaml

kubectl delete -f https://github.com/open-telemetry/opentelemetry-operator/releases/latest/download/opentelemetry-operator.yaml

# 查看安装的CRD
kubectl get crd | grep opentelemetry.io
输出：
    instrumentations.opentelemetry.io                        2025-12-11T09:02:11Z
    opampbridges.opentelemetry.io                            2025-12-11T09:02:13Z
    opentelemetrycollectors.opentelemetry.io                 2025-12-11T09:02:14Z
    targetallocators.opentelemetry.io                        2025-12-11T09:02:17Z

# 查看安装的operator控制器 Pod 状态
kubectl get pods -n opentelemetry-operator-system
NAME                                                        READY   STATUS    RESTARTS   AGE
opentelemetry-operator-controller-manager-9c4b5467d-dhhp7   1/1     Running   0          3m10s

# 查看 Operator Deployment 状态
kubectl get deploy opentelemetry-operator-controller-manager -n opentelemetry-operator-system
NAME                                        READY   UP-TO-DATE   AVAILABLE   AGE
opentelemetry-operator-controller-manager   1/1     1            1           4m43s

# 查看证书是否签发成功（验证与 cert-manager 协同正常）
NAME                                                              READY   SECRET                                                   AGE
certificate.cert-manager.io/opentelemetry-operator-serving-cert   True    opentelemetry-operator-controller-manager-service-cert   6m13s
NAME                                                              READY   AGE
issuer.cert-manager.io/opentelemetry-operator-selfsigned-issuer   True    6m12s

# 查看 Operator 相关 CRD
kubectl get crd | grep opentelemetry.io
输出：
    instrumentations.opentelemetry.io                        2026-01-14T07:28:56Z
    opampbridges.opentelemetry.io                            2026-01-14T07:28:57Z
    opentelemetrycollectors.opentelemetry.io                 2025-12-11T09:02:14Z
    targetallocators.opentelemetry.io                        2026-01-14T07:29:03Z


# 卸载命令
# 格式：helm uninstall <Release 名称> -n <命名空间>
helm uninstall opentelemetry-operator -n opentelemetry-operator

# 删除 CRD（仅当你确认不再需要任何 OTel 相关自定义资源实例时执行）
# 批量删除 Operator 相关 CRD
kubectl delete crd \
  instrumentations.opentelemetry.io \
  opentelemetrycollectors.opentelemetry.io \
  targetallocators.opentelemetry.io