Generating Certificates
Elasticsearch requires certificates for SSL/TLS encryption. You can generate these using OpenSSL or the Elasticsearch Certutil tool. We will use the Elasticsearch Certutil tool for this guide.
Step 1: Generate a Certificate Authority (CA)
First, create a Certificate Authority (CA) that will sign the certificates for your nodes.
bin/elasticsearch-certutil ca
This command will prompt you to enter a file name for the CA. For example, elastic-stack-ca.p12.
Step 2: Generate Node Certificates
Next, generate the certificates for your Elasticsearch nodes using the CA created in the previous step.
bin/elasticsearch-certutil cert --ca elastic-stack-ca.p12
This command will prompt you to enter a file name for the node certificates. For example, elastic-certificates.p12.
Step 3: Distribute Certificates
Distribute the generated elastic-certificates.p12 file to all your Elasticsearch nodes. This file contains the necessary certificates to enable SSL/TLS.
Securing Elasticsearch with Advanced SSL/TLS Encryption Configuration
Securing Elasticsearch is crucial for protecting your data and ensuring secure communication within your Elasticsearch cluster and between clients. One of the most effective ways to achieve this is by configuring SSL/TLS encryption. This guide provides a detailed, beginner-friendly explanation of advanced SSL/TLS encryption configuration in Elasticsearch, complete with examples and outputs.