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TLS Support
General Configuration
| Property | Description | Default |
|---|---|---|
druid.server.http.plaintext |
Enable/Disable HTTP connector. | true |
druid.server.http.tls |
Enable/Disable HTTPS connector. | false |
Although not recommended but both HTTP and HTTPS connectors can be enabled at a time and respective ports are configurable using druid.plaintextPort
and druid.tlsPort properties on each node. Please see Configuration section of individual nodes to check the valid and default values for these ports.
Jetty Server TLS Configuration
Druid uses Jetty as an embedded web server. To get familiar with TLS/SSL in general and related concepts like Certificates etc. reading this Jetty documentation might be helpful. To get more in depth knowledge of TLS/SSL support in Java in general, please refer to this guide. The documentation here can help in understanding TLS/SSL configurations listed below. This document lists all the possible values for the below mentioned configs among others provided by Java implementation.
| Property | Description | Default | Required |
|---|---|---|---|
druid.server.https.keyStorePath |
The file path or URL of the TLS/SSL Key store. | none | yes |
druid.server.https.keyStoreType |
The type of the key store. | none | yes |
druid.server.https.certAlias |
Alias of TLS/SSL certificate for the connector. | none | yes |
druid.server.https.keyStorePassword |
The Password Provider or String password for the Key Store. | none | yes |
druid.server.https.keyManagerPassword |
The Password Provider or String password for the Key Manager. | none | no |
Druid's internal communication over TLS
Whenever possible Druid nodes will use HTTPS to talk to each other. To enable this communication Druid's HttpClient needs to be configured with a proper SSLContext that is able to validate the Server Certificates, otherwise communication will fail.
Since, there are various ways to configure SSLContext, by default, Druid looks for an instance of SSLContext Guice binding while creating the HttpClient. This binding can be achieved writing a Druid extension which can provide an instance of SSLContext. Druid comes with a simple extension present here which should be useful enough for most simple cases, see this for how to include extensions. If this extension does not satisfy the requirement then please follow the extension [implementation] (https://github.com/druid-io/druid/tree/master/extensions-core/simple-client-sslcontext) to create your own extension.