Kubernetes: TLS certificates
TLS certificates are used in Kubernetes to secure communication between components within the cluster. Each component has its own certificate issued by a trusted Certificate Authority (CA), which is used to authenticate its identity. The CA’s public certificate is used by components to verify the validity of other components’ certificates, ensuring secure communication and protection of sensitive data or services. Additionally, client certificates are used to identify users accessing the cluster, while server certificates identify Kubernetes components such as the API server, etcd, or kubelet.
Table of Contents
· TLS Certificates
∘ Client Certificates
∘ Server Certificates😊 If you’re not familiar with TLS certificates, it’s recommended that you take a look at our article on “Building a Secure Connection: The Role of TLS, Symmetric, and Asymmetric Encryption”. This will give you a better understanding of the underlying principles of secure communication and the importance of TLS certificates in achieving it.
TLS Certificates
TLS certificates are utilized in Kubernetes to secure communication between various components within a Kubernetes cluster. Each component has its own digital certificate issued by a trusted third-party organization known as a Certificate Authority (CA). These certificates enable components to authenticate their identities when communicating with one another, ensuring that only authorized entities can access sensitive data or services.
To verify the identity of other components, each component needs to have a copy of the CA’s public certificate. This public certificate is used to verify that the digital certificate presented by the other component is valid and was issued by the same trusted CA. This ensures that the communication between components is secure and that sensitive data or services are protected.
Client Certificates
A client certificate is used to identify a client or user who is accessing a Kubernetes cluster or its components.
Server Certificates
A server certificate is used to identify a Kubernetes component, such as the API server, etcd, or kubelet.
These are my personal notes for CKA exam preparation on Kubernetes. Please feel free to correct me if you notice any errors. 😊
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