Difference between revisions of "ArchWiki:Sandbox"

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(What is Xen?)
(yep, that's how transclusions work, but 1) we don't really use them here, and 2) leaving it in this page may lead somebody to click on a section "edit" link and do sandboxing in Help:Editing)
 
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[[Category:Sandbox]]
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{{Related articles start}}
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{{Related|Help:Editing}}
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{{Related|Help:Style}}
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{{Related articles end}}
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''You can use this page to practise editing the wiki.''
  
[[Category:Virtualization]]
+
-------------------------------------------------------
[[Category:Kernel]]
+
[[de:Xen]]
+
[[es:Xen]]
+
[[ru:Xen]]
+
This document explains how to set up Xen 4.2 in Arch. It uses the new oxenstored / xl toolstack (replaces the xend / xm toolstack which was deprecated in Xen 4.1).
+
  
==何謂 Xen?==
+
==test
According to the Xen development team:
+
===dl
:"''The Xen hypervisor, the powerful open source industry standard for virtualization, offers a powerful, efficient, and secure feature set for virtualization of x86, x86_64, IA64, PowerPC, and other CPU architectures. It supports a wide range of guest operating systems including Windows®, Linux®, Solaris®, and various versions of the BSD operating systems.''"
+
====dt
 +
=====dd
 +
== test ==
 +
=== 1.1 ===
  
The Xen hypervisor is a thin layer of software which emulates a computer architecture.  It is started by the boot loader of the computer it is installed on, and allows multiple operating systems to run simultaneously on top of it.  Once the Xen hypervisor is loaded, it starts the "Dom0" (short for "domain 0"), or privileged domain, which in our case runs a Linux kernel (other possible Dom0 operating systems are NetBSD and OpenSolaris). The physical hardware must, of course, be supported by this kernel to run Xen. Once the Dom0 has started, one or more "DomUs" (short for user domains, sometimes called VMs) can be started and controlled from Dom0.
+
this is paragraph 1
  
Xen.org provides a [http://wiki.xen.org/wiki/Xen_Overview full overview]
+
this is another paragraph and another one.
  
==Types of Virtualization Available with Xen==
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<dl>
===Paravirtual (PV)===
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<dt>
Paravirtualized guests require a kernel with support for Xen built in. This is default for all recent Linux kernels and some other Unix-like systems. Paravirtualized domUs usually run faster then HVM domains as they do not have to run in emulated hardware.  
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<i>file</i><b>.i</b></dt>
===Hardware Virtual (HVM)===
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<dd>
For OSes that do not natively support Xen (e.g. Windows), HVM offers full hardware virtualization. To use HVM in Xen, the host system hardware must include either Intel VT-x or AMD-V (SVM) virtualization support. In order to verify this, run the following command on the host system:
+
C source code that should not be preprocessed.</dd>
grep -E "(vmx|svm)" --color=always /proc/cpuinfo
+
</dl>
If the above command does not produce output, then hardware virtualization support is unavailable and your hardware is unable to run Xen HVM guests. It is also possible that the host CPU supports one of these features, but that the functionality is disabled by default in the system BIOS. To verify this, access the host system's BIOS configuration menu during the boot process and look for an option related to virtualization support. If such an option exists and is disabled, then enable it, boot the system and repeat the above command.
+
<dl>
 +
<dt>
 +
<i>file</i><b>.ii</b></dt>
 +
<dd>
 +
C++ source code that should not be preprocessed.</dd>
 +
</dl>
 +
<dl>
 +
<dt>
 +
<i>file</i><b>.m</b></dt>
 +
<dd>
 +
Objective-C source code. Note that you must link with the  
 +
<i>libobjc</i> library to make an Objective-C program
 +
work.</dd>
 +
</dl>
  
== Obtaining Xen ==
+
==Arch==
Xen is available from the AUR. The recommended current stable version is [https://aur.archlinux.org/packages.php?ID=14640 Xen 4.2], and the bleeding edge unstable package can be found [https://aur.archlinux.org/packages/xen-hg-unstable/ here.] Both packages provide the Xen hypervisor, current xl interface and all configuration and support files, including systemd services.
+
  
Xen, unlike certain other virtualization systems, relies on a full install of the base operating system. Before attempting to install Xen, your host machine should have a fully operational and up-to-date install of Arch Linux. If you are building a new host from scratch, see the [[Installation_Guide|Installation Guide]] for instructions on installing Arch Linux.
+
{| class="wikitable mw-collapsible mw-collapsed"
 +
! test spoiler:
 +
|-
 +
| Cada uno es como Dios le hizo, y aún peor muchas veces.
 +
|}
  
Like all AUR packages, the Xen binaries are built from source. Note that it is possible (but not necessary) to build the package on a separate machine and transfer the xz package over, assuming that the machines share the same architecture (e.g. x86_64). For Xen, an internet connection is needed during its compilation because further source files are downloaded during the process. Xen.org recommends a host to be 64-bit. This requires the  'multilib' repository to be enabled in ''etc/pacman.conf''.
+
test test
 +
I can't live, if living is without 'U'
  
To build the package you will need the following:
+
== Test < > chars in pre and code ==
  
  base-devel zlib lzo2 python2 ncurses openssl libx11 yajl
+
  this < is < sparta >
libaio glib2 base-devel bridge-utils iproute gettext
+
dev86 bin86 iasl markdown git wget
+
+
optional packages:  ocaml ocaml-findlib
+
  
You will need to enable the 'extra' repository to get bin86. A tool such as [https://aur.archlinux.org/packages/yaourt/ yaourt] or [https://aur.archlinux.org/packages/packer/ packer] can aid in downloading, compiling and installing dependencies for AUR packages.
+
what is this {{ic|thing <doing> <<< >>>}} here
  
== Configuring Xen ==
+
==test==
The following configuration steps are required once the Xen package is installed.
+
===Third heading===
 +
This is a para also
 +
====Fourth heading====
 +
::Me too<br>New line
  
'''The dom0 host requires'''  
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'''''bold and italics'''''
* an entry in the bootloader configuration file
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* systemd services to be started at boot time
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* a xenfs filesystem mount point
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* bridged networking configuration
+
  
In addition to these required steps, the current xen.org wiki has a section regarding [http://wiki.xen.org/wiki/Xen_Best_Practices best practices for running Xen.] It includes information on allocating a fixed amount of memory dom0 and how to dedicate (pin) a CPU core for dom0 use.
+
''''' Bold and italics are in five apostrophes'''''
 +
=====Fifth Level Heading=====
 +
no indent
 +
:indent
 +
::more indent
 +
:::and more
 +
"No andes, Sancho, desceñido y flojo, que el vestido descompuesto da indicios de ánimo desmalazado."
  
=== Bootloader Configuration ===
+
==Ingredientes, panqueques con manjar!!==
Xen requires that you boot a special xen kernel (xen.gz) which in turn boots your system's normal kernel. A new bootloader entry is needed. To boot into the Xen system, we need a new menuentry in grub.cfg. The Xen package provides a grub2 generator file: ''/etc/grub.d/09_xen''. This file can be edited to customize the Xen boot commands, and will add a menuentry to your grub.cfg when the following command is run:
+
grub-mkconfig -o /boot/grub/grub.cfg
+
+
Example non-xen menuentry for LVM with gpt partition table
+
menuentry 'Arch ' {
+
  insmod part_gpt
+
  insmod lvm
+
  insmod ext2
+
  set root='lvm/vg0-arch'
+
  linux /boot/vmlinuz-linux root=/dev/mapper/vg0-arch ro init=/usr/lib/systemd/systemd quiet
+
  initrd /boot/initramfs-linux.img
+
}
+
  
The menuentry to boot the same arch system after Xen has been installed. Get the UUID for ''lvm/vg0-arch'' by using ''blkid''.
 
  
menuentry 'Arch Xen 4.2' {
+
{{hc|Ingredientes Arch|
  insmod lvm
+
  insmod part_gpt
+
  insmod ext2
+
  set root='lvm/vg0-arch'
+
  search --no-floppy --fs-uuid --set=root 346de8aa-6150-4d7b-a8c2-1c43f5929f99
+
  multiboot /boot/xen.gz placeholder dom0_mem=1024M
+
  module /boot/vmlinuz-linux placeholder root=/dev/mapper/vg0-arch ro init=/usr/lib/systemd/systemd quiet
+
  module  /boot/initramfs-linux.img
+
}
+
  
Example for a physical partition
+
* 2 Unidades de Huevos
Arch Linux(XEN)
+
* 1 Taza de Harina
menuentry "Arch Linux(XEN)" {
+
* 1 Taza de Leche
    set root=(hd0,X)
+
* 1 Cucharadita de Aceite
  search --no-floppy --fs-uuid --set=root 346de8aa-6150-4d7b-a8c2-1c43f5929f99
+
* 1 Pizca de Sal
    multiboot /boot/xen.gz dom0_mem=1024M
+
* Manjar (dulce de leche)
    module /boot/vmlinuz-linux-xen-dom0 root=/dev/sda ro
+
* 1 Paquete de Azúcar flor para decorar
    module /boot/initramfs-linux-xen-dom0.img
+
}}
}
+
More at [https://wiki.archlinux.org/index.php/Grub2 Grub2]
+
  
=== Systemd Services ===
+
== Code block ==
Issue the following commands as root so that the services are started at bootup:
+
# systemctl enable xenstored.service
+
# systemctl enable xenconsoled.service
+
# systemctl enable xendomains.service
+
  
=== Xenfs Mountpoint ===
+
{{hc|Hello World program|
Include in your ''/etc/fstab''
+
#include <stdio.h>
   none /proc/xen xenfs defaults 0 0
+
int main(int argc, char* argv[])
 +
{
 +
   printf("Hello World!\n");
 +
  return 0;
 +
}
 +
}}
  
=== Bridged Networking ===
+
== cb2 ==
Previous versions of Xen provided a bridge connection whereas Xen 4.2 requires that network communications between the guest, the host (and beyond) is set up separately. The use of both DHCP and static addressing is possible, and the choice should be determined by your network topology. With basic bridged networking, a virtual switch is created in dom0 that every domu is attached to. More complex setups are possible, see the [http://wiki.xen.org/wiki/Xen_Networking Networking] article on the Xen wiki for details.
+
{{hc|asdf|
 +
lkl
 +
}}
  
Netcfg greatly simplifies network configuration and is now included as standard in the ''base'' package. Example configuration files are provided in ''etc/network.d/examples'' and Xen 4.2 provides scripts for various networking configurations in ''/etc/xen/scripts''.  
+
*bullet list
 +
*again
 +
**indent
 +
***more indent
 +
*bullet
 +
Link to pacman
 +
[[pacman]]
 +
'''Bold text'''''Italic text'' [http://www.example.com link title]
  
By default, Xen expects a bridge to exist named xenbr0. To set this up with netcfg, do the following:
+
<s>strike out</s>
  
# cd /etc/network.d
+
test: asfd
# cp examples/bridge xenbridge-dhcp
+
  
make the following changes to xen-bridge:
+
{{Note|This is a note.}}
INTERFACE="xenbr0"
+
BRIDGE_INTERFACE="eth0" # Use the name of the external interface found with the 'ip link' command
+
DESCRIPTION="Xen bridge connection"
+
  
assuming your existing eth0 connection is called eth0-dhcp,
+
{{Note|This is another note}}
edit /etc/conf.d/netcfg
+
NETWORKS=(eth0-dhcp xenbridge-dhcp)
+
  
restart the network:
+
{{Note|The creation of these notes has been note-iced ;)}}
systemctl restart netcfg.service
+
  
when the prompt returns, check all is well
+
:::testing indent
ip addr show
+
     testing indent
brctl show
+
{{hc|Lorem Ipsum|{{Lorem Ipsum}}}}
+
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN
+
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
+
     inet 127.0.0.1/8 scope host lo
+
    inet6 ::1/128 scope host
+
      valid_lft forever preferred_lft forever
+
3: xenbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
+
    link/ether 00:1a:92:06:c0:c0 brd ff:ff:ff:ff:ff:ff
+
    inet 192.168.1.3/24 brd 192.168.1.255 scope global xenbr0
+
    inet6 fe80::21a:92ff:fe06:c0c0/64 scope link
+
      valid_lft forever preferred_lft forever
+
+
bridge name bridge id STP enabled interfaces
+
xenbr0 8000.001a9206c0c0 no eth0
+
  
=== Final Steps ===
+
== Template sandbox ==
Reboot your dom0 host and ensure that the Xen kernel boots correctly and that all settings survive a reboot. A properly set up dom0 should report show the following when you run xl list (as root):
+
# xl list
+
Name                                        ID  Mem VCPUs State Time(s)
+
Domain-0                                    0  511    2    r-----  41652.9
+
Of course, the Mem, VCPUs and Time columns will be different depending on machine configuration and uptime. The important thing is that dom0 is listed.
+
  
== Using Xen ==
+
Section for testing [[Template:Sandbox]].
Once the dom0 is fully operational, domUs may be created / imported. Each OS has a slightly different method of installation, see the [http://wiki.xen.org/wiki/Category:Guest_Install Guest Install] page of the Xen wiki for links to instructions.
+
+
=== Creating a Paravirtualized (PV) Arch domU ===
+
This is how to install Arch as a user domain (or VM) on an already-running Xen host. To install Arch ''as'' the Xen host (dom0), see the previous section.
+
  
To begin, download the latest install ISO from the nearest mirror: [https://www.archlinux.org/download/ Dowload page]. Place the ISO file on the dom0 host. (it is recommended that its checksum be verified, too)
+
{{Sandbox|Testing message.}}
  
Create the hard disks for the new domU. This can be done with [[LVM]], raw hard disk partitions or image files. To create a 10GiB blank hard disk file, the following command can be used:
+
{{Sandbox|Msg|2=Second|talk=Talk|section=Section}}
truncate -s 10G sda.img
+
This creates a sparse file, which grows (to a maximum of 10GiB) only when data is added to the image. If file IO speed is of greater importance than domain portability, using a [[LVM|Logical Volume]] or [[Partitioning|raw partition]] may be a better choice.
+
  
Next, loop-mount the installation ISO. To do this, ensure the directory /mnt exists and is empty, then run the following command (being sure to fill in the correct ISO path):
+
== Code blocks ==
# mount -o loop /path/to/iso /mnt
+
  
Create the bootstrap domU configuration file:
+
<pre>
{{hc|/etc/xen/archdomu.cfg|<nowiki>kernel = "/mnt/arch/boot/x86_64/vmlinuz"
+
<i>foo</i> [[bar]]
ramdisk = "/mnt/arch/boot/x86_64/archiso.img"
+
</pre>
extra = "archisobasedir=arch archisolabel=ARCH_201301"
+
memory = 256
+
name = "archdomu"
+
disk = [ "phy:/path/to/partition,sda1,w", "file:/path/to/ISO,sdb,r" ]
+
vif = [ 'mac=00:16:3e:__random_three_mac_bytes__,bridge=xenbr0' ]</nowiki>}}
+
This file needs to tweaked for your specific use. Most importantly, the {{ic|1=archisolabel=ARCH_201301}} line must be edited to use the release year/month of the ISO being used. The {{ic|"phy:/path/to/partition,sda1,w"}} line must be edited to point to the partition created for the domU. If an image file is being used, the {{ic|phy:}} needs to be changed to {{ic|file:}}. Finally, a MAC address must be assigned. The 00:16:3e MAC block is reserved for Xen domains, do the last three digits may be randomly filled in (hex values 0-9 and a-f only). See the xl.cfg man page for more information on what the .cfg file lines do. The AUR package [https://aur.archlinux.org/packages/xen-docs/ xen-docs] will need to be installed to access the man pages.
+
  
Create the new domU:
+
  <i>foo</i> [[bar]]
  # xl create -c /etc/xen/archdomu.cfg
+
The -c option will enter the new domain's console when successfully created. At this point, Arch should be installed as usual. The [Installation Guide] should be followed. There will be a few deviations, however. The block devices listed in the disks line of the cfg file will show up as {{ic|/dev/xvd*}}. Use these devices when partitioning the domU. After installation and before the domU is rebooted, the following modules must be added to {{ic|/etc/mkinitcpio.conf}}:
+
MODULES = "xen-blkfront xen-fbfront xen-netfront xen-kbdfront"
+
Without these modules, the domU will not boot correctly. After saving the edit, rebuild the initramfs with the following command:
+
mkinitcpio -p linux
+
For booting, it is not necessary to install Grub. Xen has a Python-based grub emulator, so all that is needed to boot is a grub.cfg file: (It may be necessary to create the /boot/grub directory)
+
{{hc|/boot/grub/grub.cfg|<nowiki>menuentry 'Arch GNU/Linux, with Linux core repo kernel' --class arch --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-core repo kernel-true-__UUID__' {
+
        insmod gzio
+
        insmod part_msdos
+
        insmod ext2
+
        set root='hd0,msdos1'
+
        if [ x$feature_platform_search_hint = xy ]; then
+
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  __UUID__
+
        else
+
          search --no-floppy --fs-uuid --set=root __UUID__
+
        fi
+
        echo    'Loading Linux core repo kernel ...'
+
        linux  /boot/vmlinuz-linux root=UUID=__UUID__ ro
+
        echo    'Loading initial ramdisk ...'
+
        initrd  /boot/initramfs-linux.img
+
}</nowiki>}}
+
This file must be edited to match the UUID of the root partition. From within the domU, run the following command:
+
# blkid
+
Replace all instances of __UUID__ with the real UUID of the root partition (the one that mounts as "/").
+
  
Shutdown the domU with the {{ic|poweroff}} command. The console will be returned to the hypervisor when the domain is fully shut down, and the domain will no longer appear in the xl domains list. Now the ISO file may be unmounted:
+
{{bc|<i>foo</i> [[bar]]}}
# umount /mnt
+
The domU cfg file should now be edited. Delete the "kernel = ", "ramdisk = ", and "extra = " lines and replace them with the following line:
+
bootloader = "pygrub"
+
Also remove the ISO disk from the "disk = " line.
+
  
The Arch domU is now set up. It may be started with the same line as before:
+
Inline <code>monospace</code>.
# xl create -c /etc/xen/archdomu.cfg
+
If the domU should be started on boot, create a symlink to the cfg file in /etc/xen/auto and ensure the xendomains service is set up correctly.
+
  
=== Useful xl command examples ===
+
== TEST ==
# xl top
+
Is this how I write stuff underneath?
# xl list
+
# xl console domUname
+
# xl shutdown domUname
+
# xl destroy domUname
+
  
== Common Errors ==
+
Is this how I link to [[wine|WINE]] ??
* 'xl list' complains about libxl
+
- Either you have not booted into the Xen system, or xen modules listed in ''xencommons'' script are not installed
+
  
* ''xl create'' fails
+
<s>Is this how I link to [[wine:PlayOnLinux.2fPLayOnMac|WINE#PlayOnLinux]]</s> < - Nope.
- check the guest's kernel is located correctly, check the pv-xxx.cfg file for spelling mistakes (like using ''initrd'' instead of ''ramdisk'')
+
  
* Arch linux guest hangs with a ctrl-d message
+
Is this how linking pages works? [[wine:PlayOnLinux.2FPlayOnMac|Wine#PlayOnLinux]]
- press ctrl-d until you get back to a prompt, rebuild its initramfs described
+
  
* Error message "''failed to execute '/usr/lib/udev/socket:/org/xen/xend/udev_event' 'socket:/org/xen/xend/udev_event': No such file or directory''"
+
<s>Tell me I have it... [[wine:#PlayOnLinux.2FPlayOnMac|WINE#PlayOnLinx]]</s> < - Im glad we have a sandbox!
- caused by ''/etc/udev/rules.d/xend.rules''; xend is (a) deprecated and (b) not used, so it is safe to remove xend.rules
+
  
==Resources==
+
This should work: [[wine#PlayOnLinux.2FPlayOnMac|WINE #PlayOnLinux]]
* [http://www.xen.org/ The homepage at xen.org]
+
 
* [http://wiki.xen.org/wiki/Main_Page The wiki at xen.org ]
+
''I GOT IT'' '''YES!''' '''''TEST OF BOLD AND ITALICS'''''
 +
 
 +
<s>Is this how I [www.google.ca LINK] to an external site?</s> < - Requires https??
 +
 
 +
[https://www.google.ca Take me to google!] < - does this work?
 +
    Yup! Also code tags work. 
 +
 
 +
:Indent?
 +
::More indent?
 +
:::Looks good to me.
 +
 
 +
===Test, part 2===
 +
 
 +
Is this how I create a subsection in the table of contents?
 +
 
 +
{| class="wikitable mw-collapsible mw-collapsed"
 +
! The answer is...:
 +
|-
 +
| YES! Also hide tags work!
 +
|}
 +
 
 +
{| class="wikitable mw-collapsible mw-collapsed"
 +
! test spoiler:
 +
|-
 +
| Cada uno es como Dios le hizo, y aún peor muchas veces.
 +
|}

Latest revision as of 01:17, 11 September 2016

Related articles

You can use this page to practise editing the wiki.


==test ===dl ====dt =====dd

test

1.1

this is paragraph 1

this is another paragraph and another one.

file.i
C source code that should not be preprocessed.
file.ii
C++ source code that should not be preprocessed.
file.m
Objective-C source code. Note that you must link with the libobjc library to make an Objective-C program work.

Arch

test spoiler:
Cada uno es como Dios le hizo, y aún peor muchas veces.
test test
I can't live, if living is without 'U'

Test < > chars in pre and code

this < is < sparta >

what is this thing <doing> <<< >>> here

test

Third heading

This is a para also

Fourth heading

Me too
New line

bold and italics

Bold and italics are in five apostrophes

Fifth Level Heading

no indent

indent
more indent
and more

"No andes, Sancho, desceñido y flojo, que el vestido descompuesto da indicios de ánimo desmalazado."

Ingredientes, panqueques con manjar!!

Ingredientes Arch

* 2 Unidades de Huevos
* 1 Taza de Harina
* 1 Taza de Leche
* 1 Cucharadita de Aceite
* 1 Pizca de Sal
* Manjar (dulce de leche)
* 1 Paquete de Azúcar flor para decorar

Code block

Hello World program
#include <stdio.h>
int main(int argc, char* argv[])
{
  printf("Hello World!\n");
  return 0;
}

cb2

asdf
lkl
  • bullet list
  • again
    • indent
      • more indent
  • bullet

Link to pacman pacman Bold textItalic text link title

strike out

test: asfd

Note: This is a note.
Note: This is another note
Note: The creation of these notes has been note-iced ;)
testing indent
   testing indent
Lorem Ipsum
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin egestas, magna non sollicitudin commodo, sapien elit semper sapien, adipiscing consectetur nisi ipsum ut elit. Sed ac neque ut nulla tempor porttitor. Mauris interdum. Cras feugiat sodales nibh. Proin neque turpis.

Template sandbox

Section for testing Template:Sandbox.

Testing message.
Msg

Code blocks

<i>foo</i> [[bar]]
foo bar
foo bar

Inline monospace.

TEST

Is this how I write stuff underneath?

Is this how I link to WINE ??

Is this how I link to WINE#PlayOnLinux < - Nope.

Is this how linking pages works? Wine#PlayOnLinux

Tell me I have it... WINE#PlayOnLinx < - Im glad we have a sandbox!

This should work: WINE #PlayOnLinux

I GOT IT YES! TEST OF BOLD AND ITALICS

Is this how I [www.google.ca LINK] to an external site? < - Requires https??

Take me to google! < - does this work?

    Yup! Also code tags work.  
Indent?
More indent?
Looks good to me.

Test, part 2

Is this how I create a subsection in the table of contents?

The answer is...:
YES! Also hide tags work!
test spoiler:
Cada uno es como Dios le hizo, y aún peor muchas veces.