[Bug 1491406] [NEW] augeas-lenses-1.2.0 - NagiosCfg lens broken for /etc/nagios.cfg due to spaces

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Ryan Harper (raharper):

[Impact]

 * The nagios lens provided in augeas-lenses can generate configuration
   values that are not parsable by nagios due to the lense creating
   these values with a space character before and after the equal.
   (foo = "bar"  vs.  foo="bar").
   
   This affects the 1.2.0 release of augeas-lenses and has been
   been fixed in newer releases available in Xenial and Yakkety.
   
 * All patches applied are already accepted upstream and newer Ubuntu
   releases are not affected.

[Test Case]

 * On a Xenial 16.04 system
  - lxc launch ubuntu-daily:trusty t1
  - lxc exec t1 /bin/bash

  # inside the container t1
  - apt-get update && apt-get install --no-install-recommends augeas-lenses augeas-tools nagios3

  # setup temp area to test augeas out per http://augeas.net/tour.html
  - export AUGEAS_ROOT=/tmp/augeas-sandbox
  - mkdir $AUGEAS_ROOT
  - cp -pr /etc $AUGEAS_ROOT
  - chown -R $(id -nu):$(id -ng) $AUGEAS_ROOT
  - augtool -b

  # in the augtool shell, make a change (remove and reset a value)
  - print /files/etc/nagios3/nagios.cfg/log_file
  - rm /files/etc/nagios3/nagios.cfg/log_file
  - set /files/etc/nagios3/nagios.cfg/log_file /var/log/nagios3/nagios.log-wark
  - save
  - control-d

  # diff the files to see the change
  - root at t2:~# diff -u $AUGEAS_ROOT/etc/nagios3/nagios.cfg.augsave $AUGEAS_ROOT/etc/nagios3/nagios.cfg
 
  # confirm that we can still parse the new config file
  - nagios3 --verify-config $AUGEAS_ROOT/etc/nagios3/nagios.cfg

[Regression Potential]

 * Users of nagios lens should verify that the change in output doesn't
   break  their usage, but the change only affects nagioscfg lens users.


[Original Description]

# lsb_release -rd
Description:	Ubuntu 14.04.3 LTS
Release:	14.04

# apt-cache policy augeas-lenses
augeas-lenses:
  Installed: 1.2.0-0ubuntu1.1
  Candidate: 1.2.0-0ubuntu1.1
  Version table:
 *** 1.2.0-0ubuntu1.1 0
        500 http://archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1.2.0-0ubuntu1 0
        500 http://archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages

3. After applying configuration changes with augeas for Nagios3 there
should be no spaces before and after "="

```nagios.cfg
var=value
```

4. Nagios3 fails to parse a configuration line with spaces before and
after "="

```nagios.cfg
var = value
```

```.log
Error in configuration file '/etc/nagios/nagios.cfg' - Line ??? (UNKNOWN VARIABLE)
   Error processing main config file!
```

Upstream fix and discussion here:
https://github.com/hercules-team/augeas/pull/177

** Affects: augeas (Ubuntu)
     Importance: Undecided
     Assignee: Ryan Harper (raharper)
         Status: Invalid

** Affects: augeas (Ubuntu Trusty)
     Importance: Undecided
         Status: New


** Tags: bitesize
-- 
augeas-lenses-1.2.0 - NagiosCfg lens broken for /etc/nagios.cfg due to spaces
https://bugs.launchpad.net/bugs/1491406
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