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From 9855ef36cfbb148918cb223a997445d59f1dd4f7 Mon Sep 17 00:00:00 2001
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From: Lars Kellogg-Stedman <lars@redhat.com>
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Date: Fri, 7 Apr 2017 18:50:54 -0400
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Subject: [PATCH] limit permissions on def_log_file
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This sets a default mode of 0600 on def_log_file, and makes this
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configurable via the def_log_file_mode option in cloud.cfg.
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LP: #1541196
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Resolves: rhbz#1424612
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X-approved-upstream: true
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---
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cloudinit/settings.py | 1 +
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cloudinit/stages.py | 3 ++-
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doc/examples/cloud-config.txt | 4 ++++
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3 files changed, 7 insertions(+), 1 deletion(-)
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diff --git a/cloudinit/settings.py b/cloudinit/settings.py
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index 6d31bb6..0d39aab 100644
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--- a/cloudinit/settings.py
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+++ b/cloudinit/settings.py
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@@ -36,6 +36,7 @@ CFG_BUILTIN = {
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'None',
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],
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'def_log_file': '/var/log/cloud-init.log',
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+ 'def_log_file_mode': 0o600,
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'log_cfgs': [],
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'mount_default_fields': [None, None, 'auto', 'defaults,nofail', '0', '2'],
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'ssh_deletekeys': False,
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diff --git a/cloudinit/stages.py b/cloudinit/stages.py
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index b0552dd..bb20a6f 100644
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--- a/cloudinit/stages.py
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+++ b/cloudinit/stages.py
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@@ -145,8 +145,9 @@ class Init(object):
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def _initialize_filesystem(self):
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util.ensure_dirs(self._initial_subdirs())
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log_file = util.get_cfg_option_str(self.cfg, 'def_log_file')
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+ log_file_mode = util.get_cfg_option_int(self.cfg, 'def_log_file_mode')
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if log_file:
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- util.ensure_file(log_file)
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+ util.ensure_file(log_file, mode=log_file_mode)
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perms = self.cfg.get('syslog_fix_perms')
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if not perms:
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perms = {}
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diff --git a/doc/examples/cloud-config.txt b/doc/examples/cloud-config.txt
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index c5f84b1..8fcce73 100644
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--- a/doc/examples/cloud-config.txt
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+++ b/doc/examples/cloud-config.txt
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@@ -397,10 +397,14 @@ timezone: US/Eastern
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# if syslog_fix_perms is a list, it will iterate through and use the
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# first pair that does not raise error.
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#
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+# 'def_log_file' will be created with mode 'def_log_file_mode', which
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+# is specified as a numeric value and defaults to 0600.
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+#
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# the default values are '/var/log/cloud-init.log' and 'syslog:adm'
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# the value of 'def_log_file' should match what is configured in logging
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# if either is empty, then no change of ownership will be done
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def_log_file: /var/log/my-logging-file.log
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+def_log_file_mode: 0600
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syslog_fix_perms: syslog:root
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# you can set passwords for a user or multiple users
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