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File Tree external pillar fails to render templates in python 3 #49927

thetaurean opened this issue Oct 8, 2018 · 3 comments


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commented Oct 8, 2018

Description of Issue/Question

The File Tree external pillar fails to render templates in python 3. The root cause is the file_tree module passes bytes to the template renderer instead of a string.

passes bytes instead of string to SLS_ENCODER.


In your salt master config

  - file_tree:
      root_dir: /srv/pillar
      render_default: yaml
        - yaml
      template: True

Steps to Reproduce Issue

Simple add a properly formatted yaml hosts file to /srv/pillar/hosts/minion_id and try to refresh pillars.
You will see that salt fails with the following error.

2018-10-08 03:51:39,344 [salt.pillar      :972 ][ERROR   ][11949] Execption caught loading ext_pillar 'file_tree':
  File "/usr/lib/python3/dist-packages/salt/pillar/", line 962, in ext_pillar
  File "/usr/lib/python3/dist-packages/salt/pillar/", line 881, in _external_pillar_data
    ext = self.ext_pillars[key](self.minion_id, pillar, **val)
  File "/usr/lib/python3/dist-packages/salt/pillar/", line 443, in ext_pillar
  File "/usr/lib/python3/dist-packages/salt/pillar/", line 536, in _ext_pillar
  File "/usr/lib/python3/dist-packages/salt/pillar/", line 258, in _construct_pillar
  File "/usr/lib/python3/dist-packages/salt/", line 142, in compile_template_str
2018-10-08 03:51:39,345 [salt.pillar      :1019][CRITICAL][11949] Pillar render error: Failed to load ext_pillar file_tree: Can't convert 'bytes' object to str implicitly
2018-10-08 03:51:43,537 [salt.utils.parsers:1045][WARNING ][11928] Master received a SIGTERM. Exiting.

Changing lines 141-142 in as follows is a temporary fix

with salt.utils.files.fopen(fn_, 'wb') as ofile:

The more appropriate fix probably belongs in

                data = contents # decode here
                if template is True:
                    data = salt.template.compile_template_str(template=contents,

Suggest using salt.utils.stringutils.to_str

Versions Report

Salt Version:
Salt: 2018.3.2

Dependency Versions:
cffi: Not Installed
cherrypy: Not Installed
dateutil: 2.4.2
docker-py: Not Installed
gitdb: 0.6.4
gitpython: 1.0.1
ioflo: Not Installed
Jinja2: 2.8
libgit2: Not Installed
libnacl: Not Installed
M2Crypto: Not Installed
Mako: Not Installed
msgpack-pure: Not Installed
msgpack-python: 0.4.6
mysql-python: Not Installed
pycparser: Not Installed
pycrypto: 2.6.1
pycryptodome: Not Installed
pygit2: Not Installed
Python: 3.5.2 (default, Nov 23 2017, 16:37:01)
python-gnupg: 0.3.8
PyYAML: 3.11
PyZMQ: 15.2.0
RAET: Not Installed
smmap: 0.9.0
timelib: Not Installed
Tornado: 4.2.1
ZMQ: 4.1.4

System Versions:
dist: Ubuntu 16.04 xenial
locale: UTF-8
machine: x86_64
release: 4.4.0-87-generic
system: Linux
version: Ubuntu 16.04 xenial


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commented Oct 8, 2018

@thetaurean Thanks for the report. Looks like this should be a fairly easy fix, would you be able to make the change and submit a PR?
@terminalmage FYI.


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Contributor Author

commented Oct 8, 2018

I'd be honored 🥇 fork, branch, and PR from my fork yes?


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commented Oct 8, 2018

@thetaurean Yes please. Thanks!

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