BSDCon Europe 17 nov 2002

1
Xperteyeskeeping your system under control

• Pim Buurman

2
Introduction

• The Problem
• The Solution
• Architecture
• Requirements
• Extending

3
The Problem

• Many systems, few administrators
• Errors and inconsistencies do not show up at once

4
The Solution

• Independent checking tool
• Fully configurable
• Extendible
• Fast
• Xperteyes

5
Architecture
system
Collector
collection
Requirements
Checker
collection
Viewer
6
Implementation

• Python
• wxPython
• Python C-extensions
• compact and fast storage
• system specific collecting

7
Collectors

• Configuration data
• Hierarchy - table - irregular
• Hierarchical storage

8
General Checker

• check ltreqsgt ltoutgt ltcollectiongt
• Errors

9
Requirements

• Object and selection
• Tests
• Context and severity

10
Requirements 2

• Selection f(curr, spec)
• Test f(curr)
• Customization
• Python as test language

11
Requirement interpretation

• All tests on the node are applied
• Overlapping requirements
• More specific blocks less specific

12
Requirement interpretation 2
/
require('/', perm_le(0755), selectionALL) require
('/tmp', perm_eq(01777), uid_eq(0)) require('/tm
p', perm_le(0777), selectionALL_CHILDREN)
/var
/usr
/tmp
/tmp/pim
/tmp/john
13
Viewer

• Demonstration

14
Repairing

• Require('/', uid_eq(0, repairActionsrepair.uid_
  eq(0)))

15
Extending

• New test
• New collector

16
Conclusion

• Simple program, complex configuration
• Available Summix stand
• Price your business card