This change migrates xpack (security, watcher, and monitoring) to use the common ssl
configuration for the elastic stack. As part of this work, several aspects of how we deal
with SSL has been modified.
From a functionality perspective, an xpack wide configuration for SSL was added and
all of the code that needs SSL uses the SSLService now. The following is a list of all
of the aspects of xpack that can have their own SSL configuration, which are separate
from the xpack wide configuration:
* Transport
* Transport profiles
* HTTP Transport
* Realms
* Monitoring Exporters
* HTTP Client
In terms of the code, some cleanups were made with these changes. SSLConfiguration is
now a concrete class and SSLConfiguration.Custom and SSLConfiguration.Global have been
removed. The validate method on key and trust configurations has been removed and these
classes will now throw exceptions when they are constructed with bad values. The
OptionalSettings helper class has been removed as it was just a file with one line functions
that made the code harder to understand. The SSL configuration and service classes have
been moved from the security source directories to the main xpack source set. The SSLService
now handles more of the configuration of the SSLEngine it returns to prevent callers from
having to handle those aspects. The settings that get registered for SSL have been moved to
XPackSettings.
Also included in this PR is a update to the docs around SSL. This includes a large simplification to
the documentation in that the certificate authority configuration section has been removed and the
process that is documented for generating certificates only includes the CLI tool that we bundle.
Closeselastic/elasticsearch#3104Closeselastic/elasticsearch#2971Closeselastic/elasticsearch#3164
Original commit: elastic/x-pack-elasticsearch@5bd9e5ef38
ad9a7c9b96