At October 1 HP released HP Service Pack for ProLiant 2015.10.0. The SPP contains firmware and drivers for HP ProLiant servers. One of the reasons to frequently update your firmware and drivers is support by HP. Organ-on-chip devices are intensively studied in academia and industry due to their high potential in pharmaceutical and biomedical applications. However, most of the existing organ-on-chip models focus on proof of concept of individual functional units without the possibility of testing multiple experimenta organ-on-a-chip systems: translating concept into practice.So I have my unRAID server serving PXE requests, now what? Well: install CentOS of course!
CentOS is an Enterprise-class Linux Distribution and they have created some nice tools to be able to create a PXE installation environment, here is how I did it.
Setting up Anonymous FTP
- First we need a directory where our 'Anonymous' FTP users go when they connect, run: mkdir -p /mnt/user/SERVER/FTP_ROOT/
- Create a anonymous ftp user, run: useradd ftp -m
- If you get an error that the user already exists, create a homefolder for it: mkdir /home/ftp
- Copy the unRAID default vsftpd.conf file to your flash drive, run: cp /etc/vsftpd.conf /boot/config/(I like editing in Windows, but if you are really determent you can do it in vi)
- Open the file towerflashconfigvsftpd.conf in your favorite text editor (like Windows notepad, but I prefer Notepad2)
- Edit it, so it looks like this:
- Now save it back to its drive and run the command: cp /boot/config/vsftpd.conf /etc/
- Also add this line to your 'go' script (towerflashconfiggo)
- Now restart the FTP server, run the command: /etc/rc.d/rc.inetd restart
- You should be able to connect to your server using an FTP client, for Windows I recommend the free application FileZilla. Just fill in your server name or IP adress and hit connect.
- If you already put files in this directory you can make them visible by setting them 'World readable', do: chmod -R -c 755 /mnt/user/SERVER/FTP_ROOT/
Although it is possible to install CentOS by loading the ISO and installing it form there, its faster and more practical to use the separate packages from the /centos/
I will be downloading the 6.0 distribution since that is the current build at this moment.
- Create a directory structure for your files: mkdir -p /mnt/user/SERVER/FTP_ROOT/CentOS/6.0/os/i386/
Optionally you can also create a /os/x86_64/ directory if you need the 64bit version
- Find a mirror nearby from the CentOS public mirror list, find one that has RSYNC support, copy the link to the RSYNC link to you clipboard.
- Now run the command: rsync -avSHP rsync://mirror.near.you/centos/6.0/os/i386/ /mnt/user/SERVER/FTP_ROOT/CentOS/6.0/os/i386/Make sure you replace the red part with the link you have in your clipboard.For the x64 edition change the link and the path accordingly.
- Now let rsync download all the required files, no worry's; if the connection drops during transmission it will pickup where it left of. Depending on your connection this may take a while, the download is about 4.37GB
- Now we need to copy 2 of the files from here to our 'PXE images' directory, first create a directory, run: mkdir -p /mnt/user/SERVER/tftpboot/images/CentOS/i386/6.0/
- Then copy over the files: cp /mnt/user/SERVER/FTP_ROOT/CentOS/6.0/os/i386/images/pxeboot/* /mnt/user/SERVER/tftpboot/images/CentOS/i386/6.0/If it say's 'cp: cannot stat `/mnt/user/SERV....etc' it means your download is not completed yet and the directory is empty. you might wanna try this step later or download the files from an FTP server (also in the mirror list)
- Make them 'world readable' by running: chmod -R -c 755 /mnt/user/SERVER/FTP_ROOT/
- Open the default file with your favorite text editor If you have followed my post about PXE on unRAID it is in TOWERservertftpbootpxelinux.cfg
- Add these lines to it: LABEL CentOS 6 x86 Manual MENU LABEL Install CentOS 6 x86 manually from FTP KERNELimages/CentOS/i386/6.0/vmlinuz APPEND initrd=images/CentOS/i386/6.0/initrd.img ramdisk_size=100000 ks=ftp://x.x.x.x/CentOS/6.0/os/i386/config/manual.cfgMake sure you replace the x.x.x.x with the IP or hostname of your FTP server.
- You can now start the installation via PXE, only you need to select all the options manually (Local media or URL, location of kickstart script, etc) we don't want that, so let's creator some kickstart scripts.
- Create a folder structure to hold your CentOS kickstart configuration files, run: mkdir /mnt/user/SERVER/FTP_ROOT/CentOS/6.0/os/i386/config/
- Open your favorite editor and create a new file with the following contents, this will create our 'manual' installation, it just sets the FTP path, the keyboard layout and assigns a DHCP address to the fist ethernet adapter it finds. For more information about kickstart scripts just do a google search for 'kickstart centos' or 'kickstart anaconda' and you will find a massive amount of websites and tutorials or take a look at the CentOS wiki.# Kickstart file for a manual FTP install. install url --url ftp://x.x.x.x/CentOS/6.0/os/i386/ lang en_US.UTF-8 keyboard us # Start the network driver and assign the client a dynamic IP network --device eth0 --bootproto dhcpMake sure you replace the x.x.x.x with the IP or hostname of your FTP server
- Save the file to your server in towerSERVERFTP_ROOTCentOS6.0osi386config and name it: manual.cfg
- Make sure the files in the FTP directory are 'world readable' run chmod -R -c 755 /mnt/user/SERVER/FTP_ROOT/once more.
- Test the installation, you should now get a step-by-step installation of CentOS that downloads all the files of the FTP server when it needs to.
As I said, there are very elaborate sites about using kickstart scripts. This is a very nice one I found by 'Security Nut' aka Damian Tommasino it's a basically installing a complete (bare server) OS completely automatic!
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A range of engine and generator controllers from Lovato are distributed locally by ElectroMechanica (EM) for voltage and current control and engine protection. Features include programmable inputs and outputs and alarm properties.
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The rear of the controller has four fitting slots to secure cables connected to the terminals with cable ties in a tidy manner inside the electric panel. A plastic retainer is also provided as standard in order to keep the expansion modules in place when installed in applications with strong vibrations.
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Lovato is one of the original international brands distributed by EM, established in 1984 by CEO Dave van den Berg. The company’s guiding motto to date has always been to supply the right product at the right price, without compromising on quality or efficiency.