问题引用

https://blog.csdn.net/weixin_45912745/article/details/127251355

加密配置

在 Kubernetes 中，ETCD 是一个高可用的键值存储系统，用于存储 Kubernetes 集群的所有状态数据，因此它是 Kubernetes 集群中最关键的组件之一。当对 ETCD 进行通信时，为确保数据的安全性和防范攻击，可以通过添加 “–cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384” 参数来指定使用 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 和 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 两种加密套件来加密和验证通信。其中，TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 和 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 都是支持 Perfect Forward Secrecy（PFS）的加密协议，可以增强数据的安全性和抵御网络攻击。因此，添加 “–cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384” 参数可以提高 ETCD 的安全性和防范可能的网络攻击。

影响

当etcd设置了–cipher-suites配置时，其他组件应该按照相同的方式配置它们的TLS配置，以确保它们使用相同的加密套件进行通信。

需要确保以下组件的TLS配置与etcd的配置相同：

Kubernetes API服务器
Kubernetes控制器管理器
Kubernetes调度器
kubelet
kube-proxy
可以通过在这些组件的启动脚本中添加–cipher-suites参数来设置相同的加密套件。同时，还需要确保证书和密钥也是相同的。

例如，如果要将etcd中的加密套件设置为TLS_RSA_WITH_AES_128_GCM_SHA256和TLS_RSA_WITH_AES_256_GCM_SHA384，则可以在kube-apiserver的启动脚本中添加以下参数：

–tls-cipher-suites=TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_GCM_SHA384
类似地，在kubelet的启动脚本中可以添加以下参数：

–tls-cipher-suites=TLS_RSA_WITH_AES_128_GCM_SHA256,TLS_RSA_WITH_AES_256_GCM_SHA384
需要注意的是，这些参数可能因Kubernetes版本而异，因此请根据您使用的版本进行相应调整。

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Encryption Configuration

In Kubernetes, ETCD is a highly available key-value storage system used to store all the state data of a Kubernetes cluster. Therefore, it is one of the most critical components in a Kubernetes cluster. When communicating with ETCD, to ensure data security and prevent attacks, you can use the “–cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384” parameter to specify the use of two encryption suites, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 and TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, for encrypting and verifying communication. TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 and TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 are both encryption protocols that support Perfect Forward Secrecy (PFS), which can enhance data security and prevent network attacks. Therefore, adding the “–cipher-suites=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384” parameter can improve the security of ETCD and prevent possible network attacks.

Impact

When ETCD is configured with the --cipher-suites option, other components should configure their TLS configuration in the same way to ensure that they communicate using the same encryption suites.

The TLS configuration of the following components needs to be ensured to be the same as the configuration of ETCD:

Kubernetes API server
Kubernetes controller manager
Kubernetes scheduler
kubelet
kube-proxy
You can set the same encryption suite by adding the --cipher-suites parameter in the startup script of these components. Also, make sure that the certificates and keys are the same.

For example, if you want to set the encryption suite in ETCD to TLS_RSA_WITH_AES_128_GCM_SHA256 and TLS_RSA_WITH_AES_256_GCM_SHA384, you can add the following parameter to the kube-apiserver startup script:

--tls-cipher-suites=TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_256_GCM_SHA384

Similarly, you can add the following parameter to the kubelet startup script:

--tls-cipher-suites=TLS_RSA_WITH_AES_128_GCM_SHA256, TLS_RSA_WITH_AES_256_GCM_SHA384

Note that these parameters may vary depending on the Kubernetes version, so please adjust accordingly.