Virtual Routing Environment (20090404)

IRC Log

G__81	hello everyone. Let me introduce myself.This is Balaji from India and i live in chennai. I am a software developer and i work for a telecommunication company	12:16
dash123	btw: please don't find it rude if i turn offline in another 45 mins cause my hostel lan will be out from 11:00 utc to 13:30 UTC...i'll be sure to read the logs	12:16
l0nwlf_	G__81: we'r waiting	12:16
G__81	I work on building software for routers and switches basically into protocol development. that's about me	12:16
G__81	l0nwlf_, i am just giving an introduction about myself :)	12:17
spevack	G__81: carry on :)	12:17
G__81	ok today we are gonna discuss about setting up a virtual router environment in fedora	12:17
dash123	fire away....me too from T.N	12:17
spevack	introductions are very useful :)	12:17
* spevack is quiet now		12:18
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G__81	ok whats a virtual router environment. Its an environment through which you could test your router software. when i say router software it could be your module which runs on Linux	12:18
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_darkstar	hello	12:19
G__81	It could also be that you have modified your Linux kernel or added functionality to your Linux kernel which would do routing or switching of IP Packets.	12:19
_darkstar	how long till classes start :?	12:19
G__81	_darkstar, just started	12:19
_darkstar	awesome :)	12:19
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G__81	now we rre going to convert our machine into many nodes within much we could do packet routing	12:20
l0nwlf_	router software ..what's the difference between the hardware router and this one conceptually ?	12:20
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G__81	yeah good question.	12:20
G__81	generally you have 2 planes one you have the control plane and the other data plane	12:21
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G__81	now when i say router software. It could be in 2 places it could be in your data plane as well as in control plane	12:21
G__81	the control plane basically runs some protocols which could be termed as router software	12:21
G__81	this is the software part of it	12:22
G__81	now lets say you have Linux kernel running and you have a network processor. example (Wintegra) and you could program this Network Processor to do packet routing	12:22
G__81	this is the hardware	12:23
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jcapel	protocols like bgp or ospf? or other kind of protocols?	12:23
G__81	so here the software does not come into picture and since you program it in the hardware, the packet switching and routing is gonna be extremely fast	12:23
G__81	jcapel, exactly	12:23
G__81	it could be bgp, ospf,rip etc	12:23
G__81	today we are gonna look into how to setup this environment using User Mode Linux	12:24
G__81	in Fedora	12:24
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G__81	User Mode Linux could be termed as a way throuh which different Nodes are simulated and there by creating a virtual network environment	12:24
G__81	any questions till now ?	12:25
l0nwlf_	well I've one question but it's kind of off-topic	12:25
G__81	off-topic ?	12:25
l0nwlf_	well then , on a financial basis hardware routers should become extinct if software routers can make things do : why do they exist ?	12:25
G__81	l0nwlf_, its something like this it depends on the place you deploy the routers. If you have a Linux box running fedora and you deploy it in a place where you dont have too much of traffic you could get along but just imagine you place it in a place where you have extreme load	12:27
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l0nwlf_	yeah , understood	12:27
dash123	g__81: can we say we'll be basically trying to emulate the router through our computer??	12:27
G__81	and morever if you take big networks customers would always love to have scalability . For example :: some routers allow plugging in network cards which have network processors through which your routers reach gets more and your router becomes scalable	12:28
G__81	dash123, yeah	12:28
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l0nwlf_	dash123: I think so	12:28
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G__81	dash123, routers can be visualized as computers running an OS with some more intelligence and this intelligence is given to it using routing protocols like BGP,OSPF	12:29
G__81	addition to it if you want to make your computer running Fedora Linux as a router , you could download quagga and set it up and it becomes a router	12:30
G__81	now lets now get into a little deeper	12:30
dash123	ok	12:30
G__81	to setup an User Mode Linux environment you would need the following,	12:30
G__81	you need a kernel and you need a file system	12:31
G__81	ok now let us zoom into the first part of the sentence	12:31
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G__81	the kernel: kernel could be a vanilla kernel which could be downloaded from kernel.org and it could be built for User Mode Linux	12:32
G__81	or you could download a prebuilt UML kernel	12:32
G__81	now lets zoom into the second part of the sentence.	12:32
G__81	The File system: The file system is needed because when the kernel boots generally in a system, it would need a root files system and hence we provide the same for User Mode Linux too.	12:33
G__81	The file system could be either built on our own which could be highly customized or it could be downloaded from the internet too	12:33
G__81	Now why at all is a file system built generally is the question to be asked	12:34
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l0nwlf_	G__81: In my case I have Fedora-10 , kernel : 2.6.27 , I think I do not need anything seperate regarding the kernel but about File system I think I had created it during Installation phase	12:34
l0nwlf_	why File system : because in linux everything is treated as a files	12:35
G__81	lets say we are going to put Linux in an embedded device where in the space is going to be very less. what we got to do here is we need to build the file system in such a way that it takes very less space	12:35
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G__81	l0nwlf_, you would still need a kernel because the kernel that F-10 comes with is built for your system architecture i386 or 64 bit	12:36
G__81	but we need to build the kernel specifically for User Mode Linux architecture.	12:36
l0nwlf_	ok	12:37
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G__81	this is a constraint when we are using User Mode Linux but if we are going to use qemu an other emulation tool, its not mandatory that you need to build a separate kernel because all qemu looks for is a kernel image	12:37
G__81	got it ?	12:37
G__81	can i move ahead ?	12:37
l0nwlf_	yeah	12:38
cwickert	yes	12:38
G__81	ok now	12:38
G__81	now lets say we want to set it up	12:38
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G__81	what we need to do is download a version of kernel from kernel.org and compile it for User Mode Linux	12:39
G__81	now how do we compile a kernel for User Mode Linux	12:39
G__81	when you compile a kernel for User Mode Linux, you get a binary file instead of a kernel image, this file could be executed just like executing a ./a.out file	12:40
jcapel	is this step mandatory? I take it there are no packages in Fedora for this then?	12:40
l0nwlf_	G__81: well what I downloaded now is a patch 2.6.29.bz2 :(	12:40
G__81	jcapel, you dont need any packages its only the kernel	12:41
G__81	that we need	12:41
jcapel	I mean a package containing a UML compiled kernel :)	12:41
l0nwlf_	Do I need to download the new kernel 2.6.29 or 2.6.27(my architecture specific)	12:41
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G__81	jcapel, fedora as far as i know has not packaged User Mode Linux in its repo but i would advice you to download the kernel source so that you get to know how its done :)	12:42
jcapel	ok! :)	12:42
G__81	l0nwlf_, you could download any kernel source. the kernel sources are not architecture dependent	12:42
G__81	its the way its built makes it architecture dependent	12:42
G__81	got it ?	12:42
G__81	can i proceed ?	12:43
l0nwlf_	yeah	12:43
jcapel	yes	12:43
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G__81	and if there are any questions for which i dont know any answer i shall send it by email :)	12:43
G__81	so forgive me on that :)	12:43
G__81	ok lets proceed	12:43
G__81	now once the kernel is downloaded	12:44
G__81	you need to untar the kernel source	12:44
G__81	first	12:44
G__81	and once is unzipped, get into the kernel source directory and issue the following command	12:44
G__81	make menuconfig ARCH=um	12:44
G__81	what does this mean	12:45
dash123	user mode i guess?	12:45
G__81	this means that you are going to configure the kernel specifically for User Mode Linux	12:45
G__81	yeah dash123 right :)	12:45
l0nwlf_	is um like a keyword just mile m32	12:45
G__81	Tip: this is the way to configure a kernel for an other architecture and do a cross compilation from there on	12:45
l0nwlf_	s/mile/like/	12:46
G__81	its a keyword	12:46
_darkstar	question	12:46
G__81	and hence it has to be case sensitive	12:46
_darkstar	oops wrong place	12:46
G__81	and if you forget to give ARCH=um it means that you are configuring it for your architecture which could be i386/686/AMD	12:47
G__81	got it?	12:47
G__81	_darkstar, whats the question	12:47
G__81	ok let me proceed	12:47
G__81	now once this step is done	12:48
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G__81	you would get a window in the terminal	12:48
G__81	with the kernel options	12:48
_darkstar	it doesnt concern this topic sorry :)	12:48
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G__81	now those are the options that the kernel presents to you in this user mode linux architecture. so if you want to really play with the kernel in trying to know what would happen if i remove a particular option or if i add a particular option, this is the place to try it	12:49
l0nwlf_	wowww...I had always wished to , never tried yet	12:50
G__81	now you need to save the configuration that you have made when you have make ARCH=um even if you have not changed anything in the window you need to save the config.	12:50
G__81	how do you save the config ?	12:50
G__81	you could see 3 buttons	12:51
G__81	select, exit and help	12:51
jcapel	it should ask when you exit, iirc	12:51
G__81	jcapel, it doent do that if you have not altered even a single option	12:51
G__81	so what you need to do is click on the save an alternate configuration file option	12:52
G__81	once you click that it shows a window where it shows .config just leave that and press OK	12:52
G__81	it means your config file is saved	12:52
G__81	now if you are really curious to know what does a kernel config file contain just do a cat of .config	12:53
G__81	cat .config and you would see the options	12:53
dash123	you did select-> save an alternate configuration file->ok	12:53
dash123	?	12:53
G__81	yeah	12:53
dash123	ok	12:53
G__81	correct	12:53
G__81	these options are very important and here is where a distribution place an important role in setting up the system	12:54
G__81	compiling whats needed and not compiling whats not needed	12:54
G__81	this is what makes a kernel so customizable	12:54
G__81	i hope you have heard about Kernel Modules	12:55
dash123	...will wiki it later...	12:55
G__81	Kernel Modules are loadable modules in the kernel. It gets loaded when its necessary on the fly and hence it removes the concept of restarting the system	12:55
l0nwlf_	G__81: I got some error	12:56
G__81	the device drivers in the linux kernel are written as kernel modules and hence when a device is plugged into the system the appropriate module is loaded	12:56
l0nwlf_	http://www.mibbit.com/pb/5EQ0Fx	12:56
G__81	l0nwlf_, whats the error	12:56
G__81	hm ok the reason is this	12:56
l0nwlf_	My kernel just downloaded ...so i was forced to start a bit late	12:56
G__81	good that you got this error otherwise people wouldnt have known it :)	12:57
G__81	if you want to configure a kernel there are many options	12:57
G__81	one make menuconfig the others are make xconfig or make qtconfig . Now if you do make menuconfig the window that comes up needs ncurses-devel package	12:57
G__81	and hence if its not installed you would get that error	12:58
G__81	and if you do make qtconfig if you dont have qt package installed you would get an error	12:58
G__81	so l0nwlf_ you would need the package ncurses-devel package	12:58
G__81	to be installed	12:58
G__81	any questions ?	12:59
G__81	can i move ahead ?	12:59
l0nwlf_	it's being downloaded currently :)	12:59
l0nwlf_	sure	12:59
G__81	ok now	12:59
G__81	we have configured the kernel for User Mode Linux Arch and now we need to compile it	12:59
G__81	to compile it we do	12:59
G__81	make ARCH=um	12:59
G__81	and it gets compiled for the UML architecture	12:59
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G__81	again i reiterate if you dont give ARCH=um it gets compiled for the host architecture	13:00
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G__81	actually we are cross compiling the kernel for an other architecture. To give you an other example: if you have an i386 system and you want the kernel to be compiled for PPC, you would need to give make ARCH=ppc to compile it for ppc	13:01
G__81	now once the compilation is over	13:01
G__81	you would see a file called linux in the folder	13:01
G__81	that's the final binary	13:01
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* G__81 waits		13:03
* jcapel is compiling :)		13:03
* l0nwlf_ is compiling		13:03
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* dash12 's internet is down(on proxy tunneling)...will experiment later		13:04
G__81	can i proceed?	13:05
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l0nwlf_	yeah	13:05
G__81	ok fine	13:05
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jcapel	yeah, still compiling, but go on	13:05
G__81	yeah not a problem	13:06
l0nwlf_	same here ..it's still compiling but please move ahead	13:06
G__81	you could do it and incase you have a problem later you could send me an email i could help you out	13:06
l0nwlf_	thanks	13:06
dash12	ok...proceed	13:06
G__81	ok now once the compilation is done you would see a binary file called linux in your folder	13:07
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G__81	this is the binary that would be used to start User Mode Linux	13:07
G__81	now how do we start UML we need a filesystem	13:07
G__81	today i shall talk on how to get this up and runnin i could give have a separate session on how to build an embedded file system	13:07
G__81	for Linux	13:08
G__81	now to get a file system you could download a file system which is pre built	13:08
l0nwlf_	how and where .. do e get inbuilt file system just like kernel	13:08
G__81	http://uml.nagafix.co.uk/filesystems/Fedora10/	13:09
G__81	download it from that link	13:09
G__81	wow........ its got f 10 itself :)	13:09
G__81	download either the x86 or x64 one	13:09
G__81	if your host is x86 dowload the x86 version	13:10
G__81	so your environment would be in sync with the host	13:10
G__81	got it ?	13:10
G__81	now once the file system is downloaded and once the kernel is also built	13:11
G__81	we need to run the first virtual instance	13:11
G__81	how	13:11
G__81	the following is the way	13:11
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l0nwlf_	well can you just tell a little bit more about inbuilt FS	13:13
G__81	yeah sure	13:13
G__81	whats a prebuilt FS	13:13
l0nwlf_	I was amazed seeing this fedora inbuilt FS	13:13
G__81	its actually not in built. its pre built fs :)	13:14
l0nwlf_	oops , sorry :)	13:14
G__81	what generally happens is this	13:14
G__81	this pre built fs is again created by a person	13:14
G__81	so what he would have done is this	13:15
G__81	he would have created a raw file system using a tool and you would need to format that file system for either ext2 or ext3 once its done	13:15
G__81	you get a file system	13:15
G__81	and of course you need to mention the space you would need	13:16
G__81	lets say	13:16
G__81	you need 3 Gig of file system you can create a raw file using dd command and then format it using mkfs command and you get the file system for 3 Gig	13:16
G__81	so you have 3 Gig of space in that file	13:16
G__81	now once you do that you would need some basic tools in that file system right ?	13:17
G__81	otherwise the linux kernel cannot boot	13:17
l0nwlf_	yeah	13:17
G__81	the very basic stuff atleast	13:17
dash12	tools like the grub in fedora??	13:18
jcapel	kernel done :)	13:18
G__81	there is a tool called busybox	13:18
G__81	anyone heard of it ?	13:18
jcapel	yes	13:18
cwickert	yes	13:18
spevack	G__81: just wanted to remind you of the time, though the :30 class is also yours :)	13:18
l0nwlf_	my kernel compilation failed :(	13:18
ranna	query: the person would have created a raw file system...... can you exact steps.. i mean the website link, if any you know	13:18
ranna	like you gave for pre-builf FS :)	13:19
jcapel	slightly offtopic: i've now got a vmlinux and linux file, are these the same?	13:19
G__81	busybox is a software which is used on 90 % of the embedded devices with which you can create a basic file system with necessary tools	13:19
G__81	spevack, yeah sure thanks :)	13:19
l0nwlf_	"cannot find -lutil"	13:20
G__81	ranna, i am not sure of a link but if you would want a way to use busybox and create a file system i could write a wiki page on it in fedora unity and can send out that link to you	13:20
dash12	lease do...wud be interested to know	13:21
dash12	*please	13:21
G__81	yeah sure :)	13:21
jcapel	l0nwlf_: yum groupinstall "Development Tools" should give you everything you need	13:21
jcapel	although it's probably just one package	13:21
ranna	sure g_81, thank you	13:21
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jcapel	that's missing, that is	13:22
dash12	ok so what is busybox	13:22
l0nwlf_	jcapel: thanks	13:22
jcapel	l0nwlf_: after that just make ARCH=um again, should pick up where it got stuck	13:22
G__81	busybox is an utility through which you can create an embedded file system with basic utilities like you would have rpm command and other stuff installed if you want you could also have deb installed	13:23
l0nwlf_	Development tool is getting installed	13:23
G__81	hence by this way you create a file system from scratch	13:23
G__81	when i say embedded file system i mean a file system which is so less in space	13:23
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zer0c00l	G_81: ramdisk?	13:23
G__81	and thats how you see linux runs on almost all devices	13:23
... join!#fedora-classroom -> LynuxDevil(n=LynuxDev@unaffiliated/ferret0567/x-681468)		13:24
G__81	no not a ramdisk ramdisk is non volatile	13:24
G__81	basically	13:24
LynuxDevil	ok	13:24
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G__81	zer0c00l, i ll give you an example	13:24
zer0c00l	ok	13:24
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G__81	zer0c00l, lets say you have 5 MB of space in your embedded device and you have customized your kernel compilation so that it occupies so less space say some 2 MB and now you need to have a file system for 3 MB you cannot create it with general tools	13:25
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zer0c00l	G__81, ok	13:26
LynuxDevil	hello	13:26
LynuxDevil	I am a Linux user for 3+ years, and a Windows user since age 4, 5, or 6. I am now 15	13:26
G__81	you would need a file system with basic utilities for 3 MB and this needs to be done by some utility which gives you a stripped version of the image of all the commands like ls, date, find, grep etc	13:26
G__81	thats what busybox does for you	13:26
LynuxDevil	ah...NVRAM fun stuff!	13:26
G__81	so in 5 MB you will have the kernel + your File system running in your device	13:26
l0nwlf_	kool	13:26
LynuxDevil	so...any other instructions for me?	13:27
spevack	G__81: 3 minutes until the next class	13:27
G__81	if you guys want a separate session on busybox i can do it for you	13:27
jcapel	before we're out of time, once I have this kernel and FS-image, how do I start it?	13:27
G__81	yeah sure	13:27
spevack	G__81: but there is no one after you, so there's flexibility :)	13:27
G__81	yeah thanks spevack :)	13:28
jcapel	by the way, I find this very interesting, so thanks. :)	13:28
G__81	./linux ubd0=your_File_System mem=1024M	13:28
G__81	this would get your UML stuff started	13:28
G__81	if you want it be more clear	13:28
G__81	lets say your kernel binary is in /home/xxx/kernel	13:29
G__81	you could give	13:29
G__81	/home/xxx/kernel/linux ubd0=File_System_path/File_system	13:29
G__81	the file system which you would have downloaded would be a tar file so you need to uncompress it first	13:29
jcapel	do I need to run this as root, or will any user with the privileges on that file system do?	13:29
LynuxDevil	UML...mmmmm....	13:29
G__81	jcapel, thanks :)	13:30
LynuxDevil	is UML faster than VirtualBox?	13:30
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G__81	you dont need to be a super user	13:30
LynuxDevil	yeah	13:30
G__81	LynuxDevil, yeah its	13:30
LynuxDevil	yeah	13:30
LynuxDevil	but is it faster?	13:30
LynuxDevil	it is?	13:30
G__81	yes	13:30
G__81	LynuxDevil, but generally selecting a proper virtualization tool depends on what you want to do	13:31
jcapel	cool, it's running :)	13:31
G__81	jcapel, hey great :)	13:31
spevack	for those who are here for Introduction to Netlink Sockets, we'll be starting in a few minutes. The previous class is just finishing up	13:31
G__81	do you get the fedora prompt ?	13:31
LynuxDevil	G__81: oh, servers	13:31
LynuxDevil	G__81: Maybe play a little game now and then	13:32
LynuxDevil	G__81: nothing serious	13:32
l0nwlf_	An error occurred while extracting files. (null)	13:32
jcapel	G__81: I get dropped into a shell	13:32
G__81	yeah	13:32
G__81	now this is the first step	13:32
jcapel	it's complaining about a missing modules.dep though	13:33
G__81	spevack, can i extend this session or should i stop it now and continue this as part 2 later ?	13:33
G__81	jcapel, yeah we could correct it though	13:33
G__81	just create a directory in the path it says	13:33
G__81	/lib/modules/2.6/29/modules.dep	13:33
G__81	just create this	13:33
G__81	and it should stop complaining :)	13:33
LynuxDevil	oh, let's have a class on using and configuring GNU Screen, including starting it up on login with a script if it's safe as to not mess up SCP/SFTP/RSYNC over SSH	13:34
jcapel	touching it is enough?	13:34
G__81	yeah its enough	13:34
LynuxDevil	I love GNU SCreen	13:34
spevack	G__81: i think you should see who is here for Netlink Sockets	13:34
LynuxDevil	show people what you can do with it	13:34
G__81	create the directories and do a touch of modules.dep	13:34
spevack	G__81: and ask them what they prefer	13:34
LynuxDevil	I am here for Netlink Sockets	13:34
LynuxDevil	It's some kernel <-> Userspace communication thing, right?	13:34
G__81	yeah	13:35
spevack	anyone else for Netlink Sockets? And do you mind waiting until :45 to start?	13:35
jcapel	G__81: worked, great. I had to do a mount -o remount,rw / for that first	13:35
* dash12 is happy as long as he gets the logs of this class so no problem with extending		13:35
mharris	I'm here to lurk on Netlink Sockets, but don't care what time it starts as I don't have to be anywhere :)	13:35
spevack	LynuxDevil: is it ok if we delay the start a little bit?	13:35
jcapel	and had to mount /proc as well, but seems to be functioning now :)	13:35
G__81	yeah great :)	13:36
spevack	G__81: i say, just carry on. But tell us what time you think you want to start Netlink Sockets	13:36
LynuxDevil	spevack: absolutely	13:36
LynuxDevil	I am just hanging out :)	13:36
* zer0c00l please update this class is irc , i missed first 15 mins :(		13:36
spevack	zer0c00l: we'll post logs	13:36
zer0c00l	ok	13:36
LynuxDevil	like...Listening to "Weird Al" Yankovic :)	13:36
G__81	spevack, i guess we could start at 11:45 UTC	13:36
mharris	What's that in universal time?	13:37
mharris	ie: EST :)	13:37
LynuxDevil	or CST?	13:37
* mharris runs		13:37
... join!#fedora-classroom -> toxa(n=toxa@92.127.96.67)		13:37
LynuxDevil	oh, CDT	13:37
LynuxDevil	s/oh/or/	13:37
zer0c00l	date -u gives u time in utc mharris	13:37
LynuxDevil	oh	13:37
G__81	ok now coming back to UML	13:37
mharris	zer0c00l: I'm kidding... I know UTC ;)	13:37
LynuxDevil	I forgot	13:37
G__81	jcapel, what you have got is the first step	13:37
LynuxDevil	nrb	13:37
LynuxDevil	brb*	13:38
mharris	I just like to think the world revolves around EST rather than UTC :)	13:38
LynuxDevil	mharris: it never did :)	13:38
spevack	ok, netlink sockets will start in 7 minutes then :)	13:38
G__81	now to come out of user mode linux you need to do power off in the UML shell and you get out of UML	13:38
LynuxDevil	oh, does anybody know how to get Amarok 2 to play MP3s?	13:38
l0nwlf_	G__81: for some reasons I'm not able to extract filesystem	13:38
jcapel	I hate to be asking this, but could we limit the offtopic-chatter please?	13:38
G__81	l0nwlf_, can you download it again ?	13:39
LynuxDevil	can we have a sort session on configuring all supported Fedora to be able to play DVD, rip DVD, MP3, and AAC?	13:39
LynuxDevil	jcapel: I want it to be a class	13:39
LynuxDevil	it's one of my pet peeves about Fedora	13:39
LynuxDevil	nothing special, just a short class would be much appreciated	13:39
l0nwlf_	G__81: yeah , sure	13:39
LynuxDevil	like, before this starts	13:39
mharris	LynuxDevil: Probably legal issues with Fedora giving classes on how to use legally grey software. :)	13:39
LynuxDevil	mharris: I wouldn't worry about that	13:40
LynuxDevil	mharris: MP3 is not grey	13:40
LynuxDevil	mharris: MP3 creators said OK	13:40
mharris	Nor would I. The Fedora Project however...	13:40
LynuxDevil	mharris: so there you go	13:40
mharris	Not the place to have a legal debate.	13:40
spevack	guys, please don't chat over the class that G__81 is runnin :)	13:40
LynuxDevil	it's perfectly legal	13:40
jcapel	G__81: what would the next steps be to launch this in a background? do you usually launch this in a screen?	13:40
LynuxDevil	even encoding	13:40
spevack	let's save suggestions for future classes for a break in the sessions	13:40
* mharris agrees with spevack ... the discussion should move to #fedora-social		13:40
LynuxDevil	alright	13:40
spevack	or add them to Classroom	13:40
ranna	G_81... proceed with your class	13:41
LynuxDevil	I will add	13:41
G__81	jcapel, yeah you would need a screen so that you could configure your IP addresses etc and could have host connectivity	13:41
G__81	if everyone is clear till this step	13:41
G__81	i can proceed to the next one	13:41
jcapel	ok!	13:42
LynuxDevil	mharris: , G__81 , spevack : I need a Feodra Wiki account please	13:42
l0nwlf_	I'll need the log though	13:42
LynuxDevil	I only want legal stuff to be in this class	13:42
G__81	now i am going to take up the next step of having host connectivity with UML	13:43
LynuxDevil	G__81: ok	13:43
l0nwlf_	LynuxDevil: Can you please STOP CHATTING	13:43
G__81	thats what i mean here	13:43
LynuxDevil	G__81: I am perfectly clear	13:43
LynuxDevil	l0nwlf_: it's related to the classroom	13:43
jcapel	LynuxDevil: not to the currently running class, please save discussing future sessions for after classes finish	13:43
G__81	lets say you have UML running and you have an IP address configured in UML instance eg: 10.1.1.1 and now you want to do a ping from your host to the User Mode Linux instance	13:43
jcapel	or another channel	13:43
G__81	how do you do it ?	13:43
G__81	this is the interesting stuff	13:43
G__81	download the uml utilities from this link	13:44
G__81	http://user-mode-linux.sourceforge.net/downloads.html	13:44
LynuxDevil	yes, please tell us G__81	13:44
LynuxDevil	G__81: does Fedora 10 include a package for those? Or RPMFusion?	13:44
G__81	i guess UML utilities is packaged	13:45
G__81	once you download it and unzip it	13:45
G__81	do make to compile the package and then do sudo make install	13:46
G__81	to install the package	13:46
G__81	meanwhile i ll tell you why do you need this uml utilities	13:46
G__81	UML utilities package contains some utilities to setup networking between the host and the UML instance	13:46
... join!#fedora-classroom -> fcami(n=fcami@fedora/fcami)		13:46
jcapel	ok, how do I configure my UML instance to have an IP address? I don't have "ip" or "ifconfig" in it	13:46
G__81	you dont have ifconfig command itself ?	13:47
jcapel	nope	13:47
jcapel	oh I do, /sbin/ifconfgi	13:47
G__81	did you look in as root ?	13:47
jcapel	just not in PATH	13:47
LynuxDevil	\hold on G__81	13:47
G__81	yeah	13:47
G__81	sure	13:47
LynuxDevil	let me download an new UML, I know how to compile it	13:47
LynuxDevil	a new	13:48
LynuxDevil	...UML...	13:48
G__81	the networking connectivity between the host and the User Mode Linux gets done using the concept of TUN and TAP devices	13:48
LynuxDevil	yes	13:49
G__81	have you all compiled and installed uml utilities ?	13:49
LynuxDevil	I heard that	13:49
LynuxDevil	I installed the package	13:49
jcapel	I used the package	13:49
LynuxDevil	I am not going to use a compile thing	13:49
LynuxDevil	only for my UML	13:49
G__81	jcapel, used it ?	13:49
... leave!#fedora-classroom -> fcami("gone")		13:49
... join!#fedora-classroom -> Adi1981(n=adi@host-195.116.125.36.tvksmp.pl)		13:49
jcapel	well, installed	13:49
jcapel	yum install uml_utilities	13:49
G__81	ok good now	13:49
... join!#fedora-classroom -> dgrift_(n=dgrift@82-197-205-60.dsl.cambrium.nl)		13:49
G__81	just check in the command line whether you have a command called tunctl	13:50
LynuxDevil	mmm...can I compile a UML for ARM on x86?	13:50
G__81	UML itself is a separate architecture	13:50
G__81	so it does not know what it runs on	13:50
jcapel	yes, I have tunctl	13:50
G__81	good so its installed	13:50
LynuxDevil	ok, well, I just need to compile a ARM binary for it	13:50
LynuxDevil	so...how to do that on Fedora 10?	13:50
l0nwlf_	nope	13:50
l0nwlf_	not installed	13:50
LynuxDevil	I just want to test ARM UML on x86	13:51
LynuxDevil	just for fun	13:51
G__81	l0nwlf_, whats the error ?	13:51
LynuxDevil	l0nwlf_: install the package uml_utilites	13:51
l0nwlf_	ok	13:51
G__81	or let me know the compilation error i ll solve it	13:51
... signoff!#fedora-classroom -> sherry151("http://www.mibbit.com ajax IRC Client")		13:51
l0nwlf_	It aws simply 'bash: tunctl: command not found'	13:52
G__81	did you do sudo make install?	13:52
G__81	of the uml utilities	13:52
G__81	i think its not installed then	13:52
l0nwlf_	I'm installing uml_utilities	13:52
G__81	ok now after installation	13:52
G__81	we need to do add few more params in the User Mode Linux command	13:53
G__81	let us add it to enable networking functionality	13:53
LynuxDevil	kernel almost done downloading	13:53
... signoff!#fedora-classroom -> dash12("http://www.mibbit.com ajax IRC Client")		13:53
LynuxDevil	l0nwlf_: that should do it	13:53
G__81	/home/xxx/linux-2.6.28/linux ubd0=File_system mem=1024M eth0=tuntap,,,10.1.1.2	13:54
G__81	you see the new parameters eth0=tuntap,,,10.1.1.2	13:54
LynuxDevil	rr...more ram would be nice	13:54
LynuxDevil	grr...	13:54
G__81	i guess there is a limit i guess you could go upto 2 gig i believe but not sure	13:54
G__81	you could probably try it	13:55
G__81	now once you add those parameters and start User Mode Linux	13:55
G__81	you would get the UML shell and log into the shell using root as the user name	13:55
G__81	then do	13:55
G__81	ifconfig eth0 10.1.1.1 up in User Mode Linux	13:55
G__81	type ifconfig	13:55
G__81	check whether the ip address is configured	13:56
G__81	now in your host you would see a new interface thats got created by name tap0	13:56
G__81	do ifconfig in the host and see there would be a new interface that would have got created	13:56
G__81	with IP 10.1.1.2	13:56
G__81	now try a ping from the host to UML ping 10.1.1.1	13:56
G__81	you should get ping responses	13:57
* G__81 waits		13:57
cwickert	works4me	13:57
LynuxDevil	uhh...it's already past next class start time	13:58
LynuxDevil	that's fine, I'm just saying	13:58
G__81	cwickert, ping works ?	13:58
LynuxDevil	I am getting the Linux 2.6.29.1 extracted	13:58
cwickert	G__81: yes	13:58
G__81	great	13:58
spevack	G__81: I think we need to take a 5 minute break for you, and start the next class at :05, and invite these folks back after the next class to continue, if they want to	13:59
LynuxDevil	Pentium 4 POS....hey, you guys should use pbzip2 on a multiple CPU machine, it's faster than bzip2 and seems to work well	13:59
G__81	so this is the basic environment though there are more options and tweaks too and you could create a topology too	13:59
LynuxDevil	alright... yes spevack	13:59
LynuxDevil	G__81: let's go to the next class, chop chop please :)	14:00
G__81	if you want more sessions on UML and if you feel this was useful and interesting you could let me know i could take up	14:00
LynuxDevil	G__81: I do	14:00
cwickert	G__81: yes please	14:00
spevack	G__81: this was a fantastic class -- any class that can run 30 extra minutes is a good one :)	14:00
jcapel	please, this was really interesting :) thanks a lot	14:00
LynuxDevil	thank you very much G__81 for your knowledge and your help!	14:00

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