ansible-role-elasticsearch/docs/ssl-tls-setup.md

X-Pack Security SSL/TLS

The role allows configuring HTTP and transport layer SSL/TLS for the cluster. You will need to generate and provide your own PKCS12 or PEM encoded certificates as described in Encrypting communications in Elasticsearch.

By default this role will upload the certs to your elasticsearch servers. If you already copied the certs by your own way, set es_ssl_upload to false (default: true)

If you don't want this role to add autogenerated SSL configuration to elasticsearch.yml set es_enable_auto_ssl_configuration to false (default: true).

The following should be configured to ensure a security-enabled cluster successfully forms:

• es_enable_http_ssl Default false. Setting this to true will enable HTTP client SSL/TLS
• es_enable_transport_ssl - Default false. Setting this to true will enable transport layer SSL/TLS

When using a PKCS12 keystore and truststore:

• es_ssl_keystore path to your PKCS12 keystore (can be the same as es_ssl_truststore)
• es_ssl_keystore_password set this if your keystore is protected with a password
• es_ssl_truststore path to your PKCS12 keystore (can be the same as es_ssl_keystore)
• es_ssl_truststore_password set this if your truststore is protected with a password

When using PEM encoded certificates:

• es_ssl_key path to your SSL key
• es_ssl_key_password set this if your SSL key is protected with a password
• es_ssl_certificate the path to your SSL certificate

Generating an SSL keystore

With a password:

$ bin/elasticsearch-certutil ca --out ./my-ca.p12 --pass "ca_password"
$ bin/elasticsearch-certutil cert --ca ./my-ca.p12 --ca-pass "ca_password" --out ./my-keystore.p12 --pass "keystore_password"

Without a password:

$ bin/elasticsearch-certutil ca --out ./my-ca.p12 --pass ""
$ bin/elasticsearch-certutil cert --ca ./my-ca.p12 --out ./my-keystore.p12 --pass ""

Additional optional SSL/TLS configuration

• es_enable_auto_ssl_configuration Default true. Whether this role should add automatically generated SSL config to elasticsearch.yml.
• es_ssl_certificate_path Default {{ es_conf_dir }}/certs. The location where certificates should be stored on the ES node.
• es_ssl_verification_mode Default certificate. See SSL verification_mode for options.
• es_ssl_certificate_authority PEM encoded certificate file that should be trusted.
• es_validate_certs Default yes. Determines if ansible should validate SSL certificates when performing actions over HTTPS. e.g. installing templates and managing native users.

Example SSL/TLS configuration

- name: Elasticsearch with SSL/TLS enabled
  hosts: localhost
  roles:
    - role: elastic.elasticsearch
  vars:
    es_config:
      node.name: "node1"
      cluster.name: "custom-cluster"
      discovery.seed_hosts: "localhost:9301"
      http.port: 9201
      transport.port: 9301
      node.data: false
      node.master: true
      bootstrap.memory_lock: true
      xpack.security.authc.realms.file.file1.order: 0
      xpack.security.authc.realms.native.native1.order: 1
    es_heap_size: 1g
    es_api_basic_auth_username: elastic
    es_api_basic_auth_password: changeme
    es_enable_http_ssl: true
    es_enable_transport_ssl: true
    es_ssl_keystore: "files/certs/my-keystore.p12"
    es_ssl_truststore: "files/certs/my-truststore.p12"
    es_ssl_keystore_password: "keystore_password"
    es_ssl_truststore_password: "truststore_password"
    es_validate_certs: no