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check it is up

Is a simple python script that can be run in a LAMP linux server. Checks in a LAMP server if a web is accesible. If not restart the services and make a copy of the last lines of the log files.

Very useful when services keep crashing and you want to keep running it no matter what.

Use it under your own criteria.

Functions

In the server were it runs check if a web url is accesible.

If not restart the services and make a copy of the last lines of the log files.

Checking the web

To check the web via Beautiful soup finds a meta tag and compared with a value. If the comparison is not succesful then

• It makes a copy of the last lines of the apache log and mysql
• Restart the services of the LAMP server

Example:

To a objective web url the following meta line can be added in the header

 `<meta name="check_it_is_up" content="check_it_is_up_key_value">`

Dependencies

Python 2.7, urllib2, Beatifulsoup

`sudo apt-get install python-beautifulsoup`

Configuration cronjobs

The script is run as a cronjob with root privileges

Cronjobs installation:

add the followin line to cronjobs

>>$ sudo crontab -e

add the following line (the script will be run evert 2 mins.

>>*/2 * * * * python <path to the folder>/check_is_up.py

Configuration check_is_up.py

The configuration is done in the main file check_is_up.py first function main()

Block options, declare which sevices want to be restarted. A pre and post bash files can be run it (check_is_up_pre.bh and check_is_up_post.bh).

check_it_is_up.action.options(runBash = False , MYSQL = True, MUNIN = True, APACHE = True, VARNISH = True, SpamASASSIN = True, POSTFIX = True, runBash_post = False, disk_usage = True)

Block logs, declare which logs want to be readed, and the route

check_it_is_up.action.log_options(log_APACHE = "/var/log/apache2/error.log", log_MySQL = "/var/log/mysql.log")

Block add web, adds a url to check via the title

check_it_is_up.add_web_to_check(name = "name", url = "http://www.yourweb.com", key = "title", key_result = "Title value")

Block add meta tag, adds a url to check via the header meta tag check_it_is_up

check_it_is_up.add_web_to_check_meta_tag(name = "name_meta", url = "http://www.yourweb.com")

Security

It is convinient to secure the scripts as root user

to secure

`>>$ sudo bash as_root.bh`

to edit

`>>$ sudo bash un_root.bh`

Log file output

A subfolder /log is created

The log files contain the info of each time check it is up has been run and the apache and mysql log files info.