Chef Client 12.21 released with security fixes!

Ohai Chefs!

We’re happy to announce the release of Chef v12.21!

Release Highlights

Security Fixes

This release of Chef Client contains a new version of zlib, fixing 4

On Debian based systems, correctly prefer Systemd to Upstart

On Debian systems, packages that support systemd will often ship both an
old style init script and a systemd unit file. When this happened, Chef
would incorrectly choose Upstart rather than Systemd as the service
provider. We now pick Systemd.

Handle the supports pseudo-property more gracefully

Chef 13 removed the supports property from core resources. However,
many cookbooks also have a property named support, and Chef 12 was
incorrectly giving a deprecation notice in that case, preventing users
from properly testing their cookbooks for upgrades.

Don’t crash when we downgrade from Chef 13 to Chef 12

On systems where Chef 13 had been run, Chef 12 would crash as the
on disk cookbook format has changed. Chef 12 now correctly ignores the
unexpected files.

Provide better system information when Chef crashes

When Chef crashes, the output now includes details about the platform
and version of Chef that was running, so that a bug report has more
detail from the off.

Please see the CHANGELOG for the complete list of changes.

Get the Build

As always, you can download binaries directly from or by using the new mixlib-install command line utility available in ChefDK 0.19.6 or greater.

$ mixlib-install download chef -v 12.21.1

Alternatively, you can install Chef using one of the following command options:

# In Shell
$ curl | sudo bash -s -- -P chef -v 12.21.1

# In Windows Powershell
. { iwr -useb } | iex; install -project chef -version 12.21.1