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hymie
Asked: 2021-10-13 05:45:32 +0800 CST

Puppet/Augeas -- ins command worked on RH6, fails on RH7

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I have this construct in my puppet module to add a line in /etc/sudoers after the last "Defaults" line:

  augeas { "sudoers.ssh_auth_sock" :
    lens => "Sudoers.lns",
    incl => "/etc/sudoers",
    onlyif  => "match Defaults/env_keep/var[. = 'SSH_AUTH_SOCK'] size==0",
    changes => [
       # Create a new Defaults line for the two variables
       "ins Defaults after Defaults[last()]",
       # Make this Defaults line a += type
       "clear Defaults[last()]/env_keep/append",
       # assign values to the two variables
       "set Defaults[last()]/env_keep/var[1] SSH_AUTH_SOCK",
    ],
  }

It works perfectly on my RedHat 6 machines

Notice: Augeas[sudoers.ssh_auth_sock](provider=augeas):
--- /etc/sudoers        2021-10-12 13:30:52.880901115 +0000
+++ /etc/sudoers.augnew 2021-10-12 13:31:28.697931561 +0000
@@ -77,6 +77,7 @@
 # Defaults   env_keep += "HOME"

 Defaults    secure_path = /sbin:/bin:/usr/sbin:/usr/bin
+Defaults env_keep += SSH_AUTH_SOCK

 ## Next comes the main part: which users can run what software on

Notice: /Stage[main]/Sudoers/Augeas[sudoers.ssh_auth_sock]/returns: executed successfully

But it fails on my RedHat 7 machines:

Warning: Augeas[sudoers.ssh_auth_sock](provider=augeas): Loading failed for one or more files, see debug for /augeas//error output
Error: /Stage[main]/Sudoers/Augeas[sudoers.ssh_auth_sock]: Could not evaluate: Error sending command 'ins' with params ["Defaults", "after", "/files/etc/sudoers/Defaults[last()]"]/Error sending command 'ins' with params ["Defaults", "after", "/files/etc/sudoers/Defaults[last()]"]

Can somebody help me understand what changed, or what I did wrong, so that I can get this snippet to work in both environments?

redhat puppet augeas

1 Answers

  1. Best Answer

    Thank you @raphink

    augtool errors said

    Error in /etc/sudoers:96.12 (parse_failed)
  Iterated lens matched less than it should
  Lens: /usr/share/augeas/lenses/dist/sudoers.aug:530.10-.70:
    Last matched: /usr/share/augeas/lenses/dist/sep.aug:47.18-.40:
    Next (no match): /usr/share/augeas/lenses/dist/sudoers.aug:500.16-501.47:

    So I checked line 96 of /etc/sudoers and it said

    @includedir /etc/sudoers.d

    Apparently, @includedir is now a valid syntax in addition to the older-style syntax #includedir ... but (my) augeas lens does not recognize the new version.

    (* View: includedir *)
let includedir =
  [ key /#include(dir)?/ . Sep.space . store Rx.fspath . eol ]

    I changed the @ to a # in /etc/sudoers and that seems to have resolved the problem.

    • 1