红帽全球峰会3.2.3. 管理凭证 root secret 格式
每个云供应商都使用 kube-system 命名空间中的一个凭证 root secret，用于满足所有凭证请求并创建它们相应的 secret。这可以通过 mint 新凭证（mint mode），或复制凭证 root secret（passthrough mode）实现。
secret 的格式因云而异，也用于每个 CredentialsRequest secret。
Microsoft Azure secret 格式
apiVersion: v1
kind: Secret
metadata:
namespace: kube-system
name: azure-credentials
stringData:
azure_subscription_id: <SubscriptionID>
azure_client_id: <ClientID>
azure_client_secret: <ClientSecret>
azure_tenant_id: <TenantID>
azure_resource_prefix: <ResourcePrefix>
azure_resourcegroup: <ResourceGroup>
azure_region: <Region>在 Microsoft Azure 中，凭证 secret 格式包括两个必须包含集群基础架构 ID 的属性，每个集群安装随机生成。该值可在运行创建清单后找到：
$ cat .openshift_install_state.json | jq '."*installconfig.ClusterID".InfraID' -r输出示例
mycluster-2mpcn这个值将在 secret 数据中使用，如下所示：
azure_resource_prefix: mycluster-2mpcn
azure_resourcegroup: mycluster-2mpcn-rg
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