I have been working with IPA in past few months and I would like to share my notes about the IPA and AD integration.
I created the trust between the Active Directory and IPA server. There is one windows client connected to the AD and one CentOS7 client connected to the IPA. Both clients are "registered" into the AD/IPA.
The physical hardware running the F5 BIG-IP Local Traffic Manager loadblancing software is powerfull, but also quite expensive. For a lab environment you do not need to buy a new hardware, but you can get the F5 BIG-IP Local Traffic Manager Virtual Edition and install it as virtual machine.
I have to solve the PostgreSQL HA and Redundancy few weeks ago. It has been written a lot about this topic, but I was not able to find some guide describing pgpool-II and repmgr. After reading some documents I build the solution which I'm going to describe.
It may happen, you need to install Cacti without any user interaction. Usually after you install Cacti you need to finish the installation using Web installation wizard where you need to specify some details.
I would like to share the details how to install the Cacti 0.8.8b the automated way without user interaction.
In my previous blog post I described the way how to configure the Turris router for my home network. I decided to extend the configuration and create the Guest WiFi for other people who want's to access the "Internet". In my solution I'm using the nodogsplash captive portal solution which offers simple way to provide restricted access to an Internet connection. Here is the extended network diagram:
I would like to put here some notes about the thermometers in OpenWrt and Turris.
Turris internal thermometers
Turris has it's own thermometers which are monitoring the temperature of CPU and board. The how-to expects the previous lighttpd configuration described in my previous post. Here is the way how you can create graps wrom the data using RRDtool.
You can find out some details about Turris wifi router, lot of photos and some command outputs in my previous blog post. Now I would like to describe the way how I configured it according the network diagram:
I will also need my own web pages, transmission torrent client, microsd card, Dynamic DNS and extend the luci interface to add some more stats + graphs. Here are the steps how I did it. There is no guarantee it will work for another Turris router.
Few months ago I joined the Turris project (turris.cz) which is a not-for-profit research project of CZ.NIC. I don't want to describe the details of the project, because you can find it on it's web page. In short the company standing behind the project take care about the Internet security and their idea was to measure number of attacks / suspicious traffic by giving the wifi routers to the participants.
The wifi router was designed by the company and it's quite powerfull machine costs 600$. In the first "round" some project members got the wifi router for free so I would like to share here the details bout it, because it's open hardware/software platform.
I you have to upgrade the firmware (iLO, BIOS, Disk firmware, NIC firmware, ...) inside many HP servers and for this task it's useful to use HP Service Pack for ProLiant (HP SPP).
This iso file contains the firmware for all supported HP servers. The easiest way is to boot from the ISO file and upgrade the server where it is running. If you have many servers - it's better to use automated way using PXEboot + Cobbler + NFS.
I would like to share few steps how I did it in my environment.
I have to take care about few enclosures with HP ProLiant BL685c and HP ProLiant BL460c blades (both G1). They are quite old now, but still can do a good job. Because there were no operating system I have no idea how the RAID or BIOS is configured. Obviously I want to have it configured the same and I really don't want to go through all of them one by one and configure it manually.
Lucky for me there is a HP Scripting Toolkit (or HP SmartStart Scripting Toolkit) which can boot over PXE and get/set the BIOS/RAID configuration.
It is handy if especially if you have a new servers without OS installed.
Let's see how you can install and configure Cobbler, NFS, PXE, tftpboot and HP Scripting Toolkit to modify the BIOS/RAID information on the server.