By Rytis Sileika

As time is going on, procedure directors are awarded with more and more advanced demanding situations. within the early days, a group of engineers may have needed to take care of one or platforms. nowadays, one engineer can administer enormous quantities or millions of systems.

System directors are steadily changing their instruments with extra complex and versatile ones. one of many offerings is Python. Structurally, Python is a latest, high-level language with a really fresh syntax. Python comes with many integrated libraries that may make automation projects more straightforward. It additionally has vast set of third-party libraries and a truly energetic improvement group. this pliability makes Python a sensible choice for a wide selection of projects, from prototyping technological know-how functions to process upkeep and management jobs.
* This booklet explains and exhibits the right way to observe Python scripting in perform. in contrast to nearly all of the Python books, it is going to help you strategy and unravel real-world matters that the majority procedure directors will encounter of their careers.
* during this e-book, you will discover numerous initiatives within the different types of community management, net server management, and tracking and database administration. In each one venture, we'll outline the matter, layout the answer, and wade through the extra attention-grabbing implementation steps.
* every one undertaking is observed with the resource code of a completely operating prototype, which you’ll have the ability to use instantly or adapt on your specifications and atmosphere.
<h3>What you’ll learn</h3> * remedy real-world procedure management difficulties utilizing Python.
* deal with units with SNMP and cleaning soap.
* construct a disbursed tracking approach.
* deal with internet purposes and parse complicated log records.
* instantly visual display unit and deal with MySQL databases.
<h3>Who this booklet is for</h3>
This publication is essentially aimed toward skilled process directors whose daily initiatives contain taking care of and coping with small-to-medium-sized server estates. it is going to even be valuable for process directors who are looking to examine extra approximately automation and wish to use their Python wisdom to unravel a number of process management problems.

Python builders also will reap the benefits of studying this ebook, specially in the event that they are interested in constructing automation and administration tools.

This booklet assumes that readers already use Python and are happy with the language. many of the Linux distributions include Python and diverse libraries (such as Django, PIL and SciPy) packaged and available, yet simple wisdom of putting in applications in a Linux/Unix atmosphere is advised.
<h3>Table of Contents</h3>
<ol> *  Reading and accumulating functionality facts utilizing SNMP1 
* coping with units utilizing the cleaning soap API  
* making a internet software for IP tackle Accountancy   
* Integrating the IP deal with program with DHCP 
* preserving a listing of digital Hosts in an Apache Configuration File   
* collecting and proposing Statistical facts from Apache Log Files  
* appearing advanced Searches and Reporting on software Log Files   
* an internet site Availability payment Script for Nagios  
* administration and tracking Subsystem  
* distant tracking Agents 
* facts accumulating and Reporting   
* computerized MySQL Database functionality Tuning  
* utilizing Amazon EC2/S3 as an information Warehouse answer
</ol>

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I use it to verify and debug almost every state (SLS file) I write. It is extremely handy to see how Salt parses the SLS file and if it matches every‐ thing I expect. show_sls, without affecting any minions. So it is a very handy tool that you should learn. We can run this state against minion2 and we should see very little change since we already added that user. 926 ms Changes: ---------fullname: Wilma Flintstone uid: 2001 Summary ----------Succeeded: 1 (changed=1) Failed: 0 ----------Total states run: 1 The important thing to notice is that after the state is applied, Salt will show you what changed.

If you were to list all of the modules available on every host, you would not see either of these. That’s because both modules expose their name as simply pkg. py is loaded on Ubuntu. doc, will know only about pkg, not yumpkg nor aptpkg. If you need to look up the specifics of the modules, either in the code or on the Web, you will need to know the full Python module name. 1 These are pretty vanilla versions of each operating system. So you would expect some similarities, but a great number of differences.

Run allows you to change the current working directory using the cwd keyword argument. run cwd=/usr 'pwd' local: /usr The Salt daemons are normally run as the root user. example: vagrant Another powerful keyword argument is env, which allows you to set an environment variable. The big difference with env is that it also needs to set a key equal to a value. So you need to set env=key=value. Obviously, that format would be very difficult to parse. run env='{foo: bar}' 'echo $foo' [INFO ] Executing command 'echo $foo' in directory '/root' local: bar 32 | Chapter 3: Execution Modules: The Functional Foundation You will see this pattern in other functions.

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