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Cipher updates in Puppet Server 6.5
Puppet Server 6.5 includes an upgrade to the latest release of Jetty's 9.4 series. With this update, you may see "weak cipher" warnings about ciphers that were previously enabled by default. Puppet Server now defaults to stronger FIPS-compliant ciphers, but you must first remove the weak ciphers.
The ciphers previously enabled by default have not been changed, but are considered weak by the updated standards. Remove the weak ciphers by removing the
cipher-suite configuration section from the
webserver.conf. After you remove the
cipher-suite, Puppet Server uses the FIPS-compliant ciphers instead. This release includes the weak ciphers for backward compatibility only.
The FIPS-compliant cipher suites, which are not considered weak, will be the default in a future version of Puppet. To maintain backwards compatibility, Puppet Server explicitly enables all cipher suites that were available as of Puppet Server 6.0. When you upgrade to Puppet Server 6.5.0, this affects you in in two ways:
The 6.5 package updates the
webserver.conffile in Puppet Server's
When Puppet Server starts or reloads, Jetty warns about weak cipher suites being enabled.
This update also removes the
so-linger-seconds configuration setting. This setting is now ignored and a warning is issued if it is set. See Jetty's so-linger-seconds for removal details.
Note: On some older operating systems, you might see additional warnings that newer cipher suites are unavailable. In this case, manage the contents of the
webserver.cipher-suitesconfiguration value to be those strong suites that available to you.
Server-side Ruby gems might need to be updated for upgrading from JRuby 1.7
When upgrading from Puppet Server 5 using JRuby 1.7 (9k was optional in those releases), Server-side gems that were installed manually with the
puppetserver gem command or using the
puppetserver_gem package provider might need to be updated to work with the newer JRuby. In most cases gems do not have APIs that break when upgrading from the Ruby versions implemented between JRuby 1.7 and JRuby 9k, so there might be no necessary updates. However, two notable exceptions are that the autosign gem should be 0.1.3 or later and yard-doc must be 0.9 or later.
Potential JAVA ARGS settings
If you're working outside of lab environment, increase
512m under normal load. If you're working with 6-12 JRuby instances (or a
max-requests-per-instance value significantly less than 100k), run with a
ReservedCodeCache of 1G. Twelve or more JRuby instances in a single server might require 2G or more.
Similar caveats regarding scaling
ReservedCodeCache might apply if users are managing
tmp directory mounted
In some cases (especially for RHEL 7 installations) if the
/tmp directory is
noexec, Puppet Server may fail to run correctly, and you may see an
error in the Puppet Server logs similar to the following:
Nov 12 17:46:12 fqdn.com java: Failed to load feature test for posix: can't find user for 0 Nov 12 17:46:12 fqdn.com java: Cannot run on Microsoft Windows without the win32-process, win32-dir and win32-service gems: Win32API only supported on win32 Nov 12 17:46:12 fqdn.com java: Puppet::Error: Cannot determine basic system flavour
This is caused by the fact that JRuby contains some embedded files which need to be
copied somewhere on the filesystem before they can be executed
(see this JRuby issue). To work
around this issue, you can either mount the
/tmp directory without
noexec, or you can choose a different directory to use as the temporary
directory for the Puppet Server process.
Either way, you'll need to set the permissions of the directory to
1777. This allows the Puppet Server JRuby process to write a file to
/tmp and then execute it. If permissions are set incorrectly, you'll get a massive stack trace without much useful information in it.
To use a different temporary directory, you can set the following JVM property:
When Puppet Server is installed from packages, add this property
JAVA_ARGS_CLI variables defined in either
/etc/default/puppetserver, depending on
your distribution. Invocations of the
use the updated
JAVA_ARGS_CLI on their next invocation. The service will
need to be restarted in order to re-read the
Puppet Server Fails to Connect to Load-Balanced Servers with Different SSL Certificates
SERVER-207: Intermittent SSL connection failures have been seen when Puppet Server tries to make SSL requests to servers via the same virtual ip address. This has been seen when the servers present different certificates during the SSL handshake.