Client ile server arasındaki, TLS bağlantısını kurmaya yönelik bu etkileşime **TLS handshake** denir.

### SNI Extension’ı ile TLS { #tls-with-sni-extension }

Server’da, belirli bir **IP adresindeki** belirli bir **portu** dinleyen **yalnızca bir process** olabilir. Aynı IP adresinde başka portları dinleyen başka process’ler olabilir, ancak IP+port kombinasyonu başına yalnızca bir tane olur.

	tlsConfig, err := saramatls.NewConfig(args.TLS.ClientTLSCert, args.TLS.ClientTLSKey)
	if err != nil {
		target.loggerOnce(context.Background(), err, target.ID().String())
		return err
	}

	config.Net.TLS.Enable = args.TLS.Enable
	config.Net.TLS.Config = tlsConfig
	config.Net.TLS.Config.InsecureSkipVerify = args.TLS.SkipVerify
	config.Net.TLS.Config.ClientAuth = args.TLS.ClientAuth

This document explains how to configure MinIO server with TLS certificates on Kubernetes.

## 1. Prerequisites

- Familiarity with [MinIO deployment process on Kubernetes](https://docs.min.io/community/minio-object-store/operations/deployments/kubernetes.html).

- Kubernetes cluster with `kubectl` configured.

mountPath: {{ $casPath }} {{- end }} {{- end -}} {{/* Formats volume for Minio tls keys and trusted certs */}} {{- define "minio.tlsKeysVolume" -}} {{- if .Values.tls.enabled }} - name: cert-secret-volume secret: secretName: {{ .Values.tls.certSecret }} items: - key: {{ .Values.tls.publicCrt }} path: public.crt - key: {{ .Values.tls.privateKey }} path: private.key {{- end }} {{- if or .Values.tls.enabled (ne .Values.trustedCertsSecret "") }} {{- $certSecret := eq .Values.trustedCertsSecret "" | ternary ...

Esse interação entre o cliente e o servidor para estabelecer uma conexão TLS é chamada de Handshake TLS.

### TLS com a Extensão SNI { #tls-with-sni-extension }

Apenas um processo no servidor pode se conectar a uma porta em um endereço IP. Poderiam existir outros processos conectados em outras portas desse mesmo endereço IP, mas apenas um para cada combinação de endereço IP e porta.

TLS (HTTPS) usa a porta `443` por padrão. Então essa é a porta que precisamos.

mountPath: {{ $casPath }} {{- end }} {{- end -}} {{/* Formats volume for Minio tls keys and trusted certs */}} {{- define "minio.tlsKeysVolume" -}} {{- if .Values.tls.enabled }} - name: cert-secret-volume secret: secretName: {{ .Values.tls.certSecret }} items: - key: {{ .Values.tls.publicCrt }} path: public.crt - key: {{ .Values.tls.privateKey }} path: private.key {{- end }} {{- if or .Values.tls.enabled (ne .Values.trustedCertsSecret "") }} {{- $certSecret := eq .Values.trustedCertsSecret "" | ternary ...

mountPath: {{ $casPath }} {{- end }} {{- end -}} {{/* Formats volume for Minio tls keys and trusted certs */}} {{- define "minio.tlsKeysVolume" -}} {{- if .Values.tls.enabled }} - name: cert-secret-volume secret: secretName: {{ .Values.tls.certSecret }} items: - key: {{ .Values.tls.publicCrt }} path: public.crt - key: {{ .Values.tls.privateKey }} path: private.key {{- end }} {{- if or .Values.tls.enabled (ne .Values.trustedCertsSecret "") }} {{- $certSecret := eq .Values.trustedCertsSecret "" | ternary ...

    * 上で述べたように、特定のIPとポートでリッスンできるプロセスは1つだけです。
    * これは、同じTLS Termination Proxyが証明書の更新処理も行う場合に非常に便利な理由の1つです。
    * そうでなければ、TLS Termination Proxyを一時的に停止し、証明書を取得するために更新プログラムを起動し、TLS Termination Proxyで証明書を設定し、TLS Termination Proxyを再起動しなければならないかもしれません。TLS Termination Proxyが停止している間はアプリが利用できなくなるため、これは理想的ではありません。


アプリを提供しながらこのような更新処理を行うことは、アプリケーション・サーバー（Uvicornなど）でTLS証明書を直接使用するのではなく、TLS Termination Proxyを使用して**HTTPSを処理する別のシステム**を用意したくなる主な理由の1つです。

import okhttp3.tls.internal.der.AlgorithmIdentifier
import okhttp3.tls.internal.der.AttributeTypeAndValue
import okhttp3.tls.internal.der.BasicConstraints
import okhttp3.tls.internal.der.BitString
import okhttp3.tls.internal.der.Certificate
import okhttp3.tls.internal.der.CertificateAdapters
import okhttp3.tls.internal.der.CertificateAdapters.generalNameDnsName

mountPath: {{ $casPath }} {{- end }} {{- end -}} {{/* Formats volume for MinIO TLS keys and trusted certs */}} {{- define "minio.tlsKeysVolume" -}} {{- if .Values.tls.enabled }} - name: cert-secret-volume secret: secretName: {{ .Values.tls.certSecret }} items: - key: {{ .Values.tls.publicCrt }} path: public.crt - key: {{ .Values.tls.privateKey }} path: private.key {{- end }} {{- if or .Values.tls.enabled (ne .Values.trustedCertsSecret "") }} {{- $certSecret := eq .Values.trustedCertsSecret "" | ternary ...