Figuring things out, to get it done!
Visual Studio and the Silverlight SDK are two dependancies that are needed for the installation of RiaServices. If you are dep[loying this package to a server with IIS7.5, these dependancies do not need to be installed. To install RiaServices.msi on the server, use the following command:
msiexec /i RiaServices.msi SERVER=TRUE
This error will happen when WCF Activation Services is installed AFTER .Net 4.0 Framework. To fix, open a command prompt in the .Net 4.0 directory:
C:\Windows\Microsoft.NET\Framework64\v4.0.30319
and run the following command:
aspnet_regiis.exe -iru
Since the IIS instances are behind load balancers, the load balancer IP is inserted as the client-ip. To work around this, an IIS module is needed that replaces the client-ip value with the correct value. This is acomplished with two changes. First, the ACE must inject a speacial header value. In this case the header value is X-Client-IP. Second, the arr_helper module has to be installed and configured to replace the client-ip value with the correct value.
The module can be found here:
The module is installed in:
%PROGRAMFILES%\IIS\ARR Helper\
The configuration is located in:
%windir%\system32\inetsrv\config\schema\arr_helper_schema.xml
This is a ruby script that can download a web page. Source here:
http://code.google.com/p/nagios-check-webpage/
Installation:
Prerequisites:
apt-get install ruby rubygems
gem update
apt-get install ruby1.8-dev
gem install hpricot
apt-get install libopenssl-ruby
Nagios Check Command:
define command{
command_name check-webpage
command_line $USER1$/check_webpage.rb -u $HOSTADDRESS$$ARG1$
}
/usr/bin – binary
/usr/share/nagios – main web site content
/usr/lib/nagios – CGI’s
/var/nagios – logs, archives, external commands
/etc/nagios – configs
/var/log/nagios – logs
/usr/include/nagios – headers
| If it’s up… | A.K.A | It’s down for…per year |
|---|---|---|
| 90% | n/a | 876 hours |
| 95% | n/a | 438 hours |
| 99% | two 9’s | 87 hours, 36 minutes |
| 99.9% | three 9’s | 8 hours, 45 minutes |
| 99.99% | four 9’s | 52 minutes, 33.6 seconds |
| 99.999% | five 9’s | 5 minutes, 15.36 seconds |
| 99.9999% | six 9’s | 31.68 seconds |