Ene 142013
Aclaración: Partimos de una instalación mínima de Debian squeeze. El servidor que funcionara como Dom0 debe tener dos placas de red una para el Dom0 y otra para el bridge por el que se ruteara todo el trafico de los DomU.
Configuramos la Red, primero instalamos el paquete bridge-utils
root@x49:/# apt-get install bridge-utils Reading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed: bridge-utils 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded. Need to get 32.7 kB of archives. After this operation, 176 kB of additional disk space will be used. Get:1 http://ftp.debian.org/debian/ squeeze/main bridge-utils amd64 1.4-5 [32.7 kB] Fetched 32.7 kB in 1s (20.7 kB/s) Selecting previously deselected package bridge-utils. (Reading database ... 35324 files and directories currently installed.) Unpacking bridge-utils (from .../bridge-utils_1.4-5_amd64.deb) ... Processing triggers for man-db ... Setting up bridge-utils (1.4-5) ... root@x49:/#
Luego editamos el archivo /etc/network/interfaces de manera que luzca asi (reemplazar address, netmask, network, broadcast y gateway por los correspondientes de su red)
root@x49:/# cat /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet static
address 192.168.252.49
netmask 255.255.255.0
network 192.168.252.0
broadcast 192.168.252.255
gateway 192.168.252.1
# dns-* options are implemented by the resolvconf package, if installed
dns-nameservers 8.8.8.8 8.8.4.4
auto xenbr0
iface xenbr0 inet manual
bridge_fd 0
bridge_helo 0
bridge_maxwait 0
bridge_stp off
bridge_ports eth1
root@x49:/#
Restarteamos y chequeamos la configuración de la red
root@x49:/# /etc/init.d/networking stop ; /etc/init.d/networking start
Deconfiguring network interfaces...done.
Configuring network interfaces...done.
root@x49:/# ifconfig
eth0 Link encap:Ethernet HWaddr 08:00:27:73:6f:66
inet addr:192.168.252.49 Bcast:192.168.252.255 Mask:255.255.255.0
inet6 addr: fe80::a00:27ff:fe73:6f66/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1044 errors:0 dropped:0 overruns:0 frame:0
TX packets:705 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:124525 (121.6 KiB) TX bytes:231947 (226.5 KiB)
eth1 Link encap:Ethernet HWaddr 08:00:27:a2:66:a8
inet6 addr: fe80::a00:27ff:fea2:66a8/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:50826 errors:0 dropped:0 overruns:0 frame:0
TX packets:87 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:9851940 (9.3 MiB) TX bytes:7350 (7.1 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:8 errors:0 dropped:0 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:560 (560.0 B) TX bytes:560 (560.0 B)
xenbr0 Link encap:Ethernet HWaddr 08:00:27:a2:66:a8
inet6 addr: fe80::a00:27ff:fea2:66a8/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:258 (258.0 B) TX bytes:328 (328.0 B)
root@x49:/#
Nos aseguramos de agregar a nuestro sources.list las secciones non-free, contrib y los repositorios backports, y debian testing, de tal manera que luzca así.
root@x49:/# cat /etc/apt/sources.list deb http://ftp.debian.org/debian/ squeeze main non-free contrib deb-src http://ftp.debian.org/debian/ squeeze main non-free contrib deb http://security.debian.org/ squeeze/updates main contrib non-free deb-src http://security.debian.org/ squeeze/updates main contrib non-free # squeeze-updates, previously known as 'volatile' deb http://ftp.debian.org/debian/ squeeze-updates main contrib non-free deb-src http://ftp.debian.org/debian/ squeeze-updates main contrib non-free deb http://backports.debian.org/debian-backports squeeze-backports main contrib non-free deb-src http://backports.debian.org/debian-backports squeeze-backports main contrib non-free deb http://ftp.debian.org/debian/ wheezy main non-free contrib deb-src http://ftp.debian.org/debian/ wheezy main non-free contrib deb http://security.debian.org/ wheezy/updates main contrib non-free deb-src http://security.debian.org/ wheezy/updates main contrib non-free deb http://ftp.debian.org/debian/ stable main non-free contrib deb-src http://ftp.debian.org/debian/ stable main non-free contrib deb http://security.debian.org/ stable/updates main contrib non-free deb-src http://security.debian.org/ stable/updates main contrib non-free deb http://ftp.debian.org/debian/ testing main non-free contrib deb-src http://ftp.debian.org/debian/ testing main non-free contrib deb http://security.debian.org/ testing/updates main contrib non-free deb-src http://security.debian.org/ testing/updates main contrib non-free root@x49:/#
Y debemos agregar o editar el archivo /etc/apt/preferences de manera que luzca así
Package: * Pin: release a=stable Pin-Priority: 500 Package: * Pin: release a=squeeze-backports Pin-Priority: 475 Package: * Pin: release a=testing Pin-Priority: 450 Package: linux-image-3.2.0-0.bpo.4-amd64 Pin: release a=squeeze-backports Pin-Priority: 750 Package: xen-linux-system-3.2.0-0.bpo.4-amd64 Pin: release a=squeeze-backports Pin-Priority: 750 Package: libpci-dev Pin: release a=squeeze-backports Pin-Priority: 750 Package: libpci3 Pin: release a=squeeze-backports Pin-Priority: 750 Package: pciutils Pin: release a=squeeze-backports Pin-Priority: 750 Package: e2fslibs Pin: release a=squeeze-backports Pin-Priority: 750 Package: e2fsprogs Pin: release a=squeeze-backports Pin-Priority: 750 Package: libcomerr2 Pin: release a=squeeze-backports Pin-Priority: 750 Package: libgnutls28 Pin: release a=squeeze-backports Pin-Priority: 750 Package: gnutls-bin Pin: release a=squeeze-backports Pin-Priority: 750 Package: libcurl3-gnutls Pin: release a=squeeze-backports Pin-Priority: 750 Package: python Pin: release a=squeeze-backports Pin-Priority: 750 Package: syslinux Pin: release a=squeeze-backports Pin-Priority: 750 Package: syslinux-common Pin: release a=squeeze-backports Pin-Priority: 750 Package: linux-base Pin: release a=squeeze-backports Pin-Priority: 750 Package: firmware-linux-free Pin: release a=squeeze-backports Pin-Priority: 750 Package: firmware-linux-nonfree Pin: release a=squeeze-backports Pin-Priority: 750 Package: initramfs-tools Pin: release a=squeeze-backports Pin-Priority: 750 Package: libssl1.0.0 Pin: release a=squeeze-backports Pin-Priority: 750 Package: xen-hypervisor-4.1-amd64 Pin: release a=testing Pin-Priority: 750 Package: xen-utils-4.1 Pin: release a=testing Pin-Priority: 750 Package: libxen-4.1 Pin: release a=testing Pin-Priority: 750 Package: libxenstore3.0 Pin: release a=testing Pin-Priority: 750 Package: xen-utils-common Pin: release a=testing Pin-Priority: 750 Package: xenstore-utils Pin: release a=testing Pin-Priority: 750 Package: python2.7 Pin: release a=testing Pin-Priority: 750 Package: python2.7-minimal Pin: release a=testing Pin-Priority: 750
Ahora instalamos el Kernel linux-image-3.2.0-0.bpo.4-amd64 de backports y los firmwares
root@x49:/# apt-get -t squeeze-backports install linux-image-3.2.0-0.bpo.4-amd64 firmware-linux firmware-linux-free firmware-linux-nonfree Reading package lists... Done Building dependency tree Reading state information... Done The following packages were automatically installed and are no longer required: menu libmpfr4 fakeroot linux-kbuild-2.6.32 linux-headers-2.6.32-5-common libgomp1 gcc-4.3 gcc-4.4 cpp libgmp3c2 gcc linux-headers-2.6.32-5-amd64 dkms libc6-dev gcc-4.3-base cpp-4.3 cpp-4.4 linux-libc-dev patch manpages-dev libc-dev-bin binutils linux-headers-2.6-amd64 make Use 'apt-get autoremove' to remove them. Suggested packages: linux-doc-3.2 debian-kernel-handbook The following NEW packages will be installed: firmware-linux firmware-linux-free firmware-linux-nonfree linux-image-3.2.0-0.bpo.4-amd64 0 upgraded, 4 newly installed, 0 to remove and 32 not upgraded. Need to get 0 B/24.1 MB of archives. After this operation, 118 MB of additional disk space will be used. Preconfiguring packages ... Selecting previously deselected package linux-image-3.2.0-0.bpo.4-amd64. (Reading database ... 35148 files and directories currently installed.) Unpacking linux-image-3.2.0-0.bpo.4-amd64 (from .../linux-image-3.2.0-0.bpo.4-amd64_3.2.35-2~bpo60+1_amd64.deb) ... Selecting previously deselected package firmware-linux-free. Unpacking firmware-linux-free (from .../firmware-linux-free_2.6.32-46_all.deb) ... Selecting previously deselected package firmware-linux-nonfree. Unpacking firmware-linux-nonfree (from .../firmware-linux-nonfree_0.35~bpo60+1_all.deb) ... Selecting previously deselected package firmware-linux. Unpacking firmware-linux (from .../firmware-linux_0.35~bpo60+1_all.deb) ... Setting up linux-image-3.2.0-0.bpo.4-amd64 (3.2.35-2~bpo60+1) ... Running depmod. Examining /etc/kernel/postinst.d. run-parts: executing /etc/kernel/postinst.d/dkms 3.2.0-0.bpo.4-amd64 /boot/vmlinuz-3.2.0-0.bpo.4-amd64 dkms: running auto installation service for kernel 3.2.0-0.bpo.4-amd64: dkms: WARNING: linux headers are missing, which may explain the above failures. please install the linux-headers-3.2.0-0.bpo.4-amd64 package to fix this. run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.2.0-0.bpo.4-amd64 /boot/vmlinuz-3.2.0-0.bpo.4-amd64 update-initramfs: Generating /boot/initrd.img-3.2.0-0.bpo.4-amd64 run-parts: executing /etc/kernel/postinst.d/zz-update-grub 3.2.0-0.bpo.4-amd64 /boot/vmlinuz-3.2.0-0.bpo.4-amd64 Generating grub.cfg ... Found linux image: /boot/vmlinuz-3.2.0-0.bpo.4-amd64 Found initrd image: /boot/initrd.img-3.2.0-0.bpo.4-amd64 Found linux image: /boot/vmlinuz-2.6.32-5-amd64 Found initrd image: /boot/initrd.img-2.6.32-5-amd64 done Setting up firmware-linux-free (2.6.32-46) ... Setting up firmware-linux-nonfree (0.35~bpo60+1) ... update-initramfs: deferring update (trigger activated) Setting up firmware-linux (0.35~bpo60+1) ... Processing triggers for initramfs-tools ... update-initramfs: Generating /boot/initrd.img-3.2.0-0.bpo.4-amd64 root@x49:/#
Reiniciamos y chequeamos que efectivamente el kernel sea el 3.2
root@x49:/# uname -r 3.2.0-0.bpo.4-amd64 root@x49:/#
Ahora instalamos xen 4.1 de los repositorios testing
root@x49:/# apt-get -t testing install libxen-4.1 xen-hypervisor-4.1-amd64 xen-utils-4.1 xen-linux-system-3.2.0-0.bpo.4-amd64 Reading package lists... Done Building dependency tree Reading state information... Done The following packages were automatically installed and are no longer required: menu linux-headers-amd64 libxfixes3 libgmp10 libxcomposite1 libmpfr4 fakeroot xfonts-encodings iso-codes x11-xkb-utils libdrm-radeon1 linux-kbuild-2.6.32 linux-headers-2.6.32-5-common xserver-common libgl1-mesa-dri gcc-4.6-base libgomp1 python-apt-common xfonts-utils linux-headers-3.2.0-4-amd64 gcc-4.4 gcc-4.6 libxfont1 libquadmath0 libdrm2 libpixman-1-0 libxaw7 linux-headers-3.2.0-4-common cpp libgmp3c2 gcc xfonts-base dkms libice6 libdrm-intel1 libxmu6 libxpm4 libxrender1 linux-kbuild-3.2 libfontenc1 libpciaccess0 libc6-dev gcc-4.3-base x11-common cpp-4.3 libsm6 cpp-4.4 cpp-4.6 libxdamage1 linux-libc-dev patch manpages-dev libc-dev-bin binutils libxt6 libaudit0 linux-headers-2.6-amd64 libxrandr2 lsb-release make libxkbfile1 libmpc2 Use 'apt-get autoremove' to remove them. The following extra packages will be installed: binutils cpp-4.4 cpp-4.6 e2fslibs e2fsprogs gawk gcc-4.4 gcc-4.4-base gcc-4.6 gcc-4.6-base gcc-4.7-base krb5-locales libaio1 libcomerr2 libcurl3-gnutls libdb5.1 libexpat1 libgcc1 libgmp10 libgnutls26 libgomp1 libgssapi-krb5-2 libgssglue1 libiscsi1 libk5crypto3 libkrb5-3 libkrb5support0 liblzma5 libmpc2 libmpfr4 libp11-kit0 libpci3 libquadmath0 librtmp0 libsigsegv2 libssh2-1 libssl1.0.0 libstdc++6 libtinfo5 libxenstore3.0 linux-headers-2.6-amd64 linux-headers-3.2.0-4-amd64 linux-headers-3.2.0-4-common linux-headers-amd64 linux-kbuild-3.2 multiarch-support pciutils python python-minimal python-support python2.7 python2.7-minimal qemu-keymaps qemu-utils sharutils xen-system-amd64 xen-utils-common xenstore-utils Suggested packages: binutils-doc gcc-4.4-locales gcc-4.6-locales gpart parted e2fsck-static gawk-doc gcc-4.4-multilib libmudflap0-4.4-dev gcc-4.4-doc libgcc1-dbg libgomp1-dbg libmudflap0-dbg libcloog-ppl0 libppl-c2 libppl7 gcc-4.6-multilib libmudflap0-4.6-dev gcc-4.6-doc libquadmath0-dbg binutils-gold krb5-doc krb5-user python-doc python-tk python2.7-doc binfmt-support debootstrap xen-docs-4.1 Recommended packages: xen-hypervisor-4.1 The following packages will be REMOVED: apt-listchanges gcc-4.3 linux-headers-2.6.32-5-amd64 python-apt The following NEW packages will be installed: cpp-4.6 gawk gcc-4.6 gcc-4.6-base gcc-4.7-base krb5-locales libaio1 libcurl3-gnutls libdb5.1 libgmp10 libiscsi1 liblzma5 libmpc2 libp11-kit0 libquadmath0 librtmp0 libsigsegv2 libssh2-1 libssl1.0.0 libtinfo5 libxen-4.1 libxenstore3.0 linux-headers-3.2.0-4-amd64 linux-headers-3.2.0-4-common linux-headers-amd64 linux-kbuild-3.2 multiarch-support python2.7 python2.7-minimal qemu-keymaps qemu-utils sharutils xen-hypervisor-4.1-amd64 xen-linux-system-3.2.0-0.bpo.4-amd64 xen-system-amd64 xen-utils-4.1 xen-utils-common xenstore-utils The following packages will be upgraded: binutils cpp-4.4 e2fslibs e2fsprogs gcc-4.4 gcc-4.4-base libcomerr2 libexpat1 libgcc1 libgnutls26 libgomp1 libgssapi-krb5-2 libgssglue1 libk5crypto3 libkrb5-3 libkrb5support0 libmpfr4 libpci3 libstdc++6 linux-headers-2.6-amd64 pciutils python python-minimal python-support 24 upgraded, 38 newly installed, 4 to remove and 264 not upgraded. Need to get 46.9 MB of archives. After this operation, 86.5 MB of additional disk space will be used. Do you want to continue [Y/n]?
Luego configuramos grub, primero editamos /etc/default/grub
root@x49:/# cat /etc/default/grub # If you change this file, run 'update-grub' afterwards to update # /boot/grub/grub.cfg. GRUB_DEFAULT=0 GRUB_TIMEOUT=9 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian` GRUB_CMDLINE_LINUX_DEFAULT="elevator=deadline acpi=on numa=on quiet nomodeset video=uvesafb:mode_option=1024x768-32,mtrr=3,scroll=ywrap" GRUB_CMDLINE_LINUX="" GRUB_CMDLINE_XEN_DEFAULT="noreboot console=vga cpufreq=dom0-kernel dom0_mem=1024M dom0_max_vcpus=2 xsave=1 vesa-mtrr=3 vga=gfx-1024x768x32" GRUB_CMDLINE_XEN="" GRUB_DISABLE_OS_PROBER=true # Uncomment to enable BadRAM filtering, modify to suit your needs # This works with Linux (no patch required) and with any kernel that obtains # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...) #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef" # Uncomment to disable graphical terminal (grub-pc only) #GRUB_TERMINAL=console # The resolution used on graphical terminal # note that you can use only modes which your graphic card supports via VBE # you can see them in real GRUB with the command `vbeinfo' GRUB_GFXMODE=1024x768 GRUB_GFXPAYLOAD_LINUX=keep # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux #GRUB_DISABLE_LINUX_UUID=true # Uncomment to disable generation of recovery mode menu entries #GRUB_DISABLE_LINUX_RECOVERY="true" # Uncomment to get a beep at grub start GRUB_INIT_TUNE="480 440 1" GRUB_PRELOAD_MODULES="vbe vga video_fb" root@x49:/#
Luego vamos al directorio /etc/grub.d y creamos el siguiente enlace simbolico (esto solo es necesario si queremos que bootee por defecto con el hypervisor de xen)
root@x49:/# cd /etc/grub.d/ root@x49:/etc/grub.d# ln -s 20_linux_xen 09_linux_xen root@x49:/etc/grub.d# ls -l total 52 -rwxr-xr-x 1 root root 6433 Sep 19 2011 00_header -rwxr-xr-x 1 root root 5343 Sep 19 2011 05_debian_theme lrwxrwxrwx 1 root root 12 Jan 14 21:58 09_linux_xen -> 20_linux_xen -rwxr-xr-x 1 root root 4284 Sep 19 2011 10_linux -rwxr-xr-x 1 root root 4925 Sep 19 2011 20_linux_xen -rwxr-xr-x 1 root root 5789 Sep 19 2011 30_os-prober -rwxr-xr-x 1 root root 214 Sep 19 2011 40_custom -rwxr-xr-x 1 root root 95 Sep 19 2011 41_custom -rw-r--r-- 1 root root 483 Sep 19 2011 README root@x49:/etc/grub.d#
Luego editamos los archivos /etc/default/xen, /etc/xen/xend-config.sxp y /etc/xen/xl.conf (vamos a utilizar el toolstack xl)
root@x49:/# cat /etc/default/xen # Configuration for Xen system # ---------------------------- # There exists several tool stacks to configure a Xen system. # ⦠# Attention: You need to reboot after changing this! TOOLSTACK=xl root@x49:/#
root@x49:/# cat /etc/xen/xend-config.sxp # -*- sh -*- # # Xend configuration file. # # (network-script network-bridge) # # Your default ethernet device is used as the outgoing interface, by default. # To use a different one (e.g. eth1) use # # (network-script 'network-bridge netdev=eth1') # # The bridge is named eth0, by default (yes, really!) # (network-script network-dummy) (vif-script vif-bridge) (dom0-min-mem 512) # Whether to enable auto-ballooning of dom0 to allow domUs to be created. # If enable-dom0-ballooning = no, dom0 will never balloon out. (enable-dom0-ballooning no) # 32-bit paravirtual domains can only consume physical # memory below 168GB. On systems with memory beyond that address, # they'll be confined to memory below 128GB. # Using total_available_memory (in GB) to specify the amount of memory reserved # in the memory pool exclusively for 32-bit paravirtual domains. # Additionally you should use dom0_mem = as a parameter in # xen kernel to reserve the memory for 32-bit paravirtual domains, default # is "0" (0GB). (total_available_memory 0) # In SMP system, dom0 will use dom0-cpus # of CPUS # If dom0-cpus = 0, dom0 will take all cpus available (dom0-cpus 0) (vncpasswd '') root@x49:/#
root@x49:/# cat /etc/xen/xl.conf ## Global XL config file ## # automatically balloon down dom0 when xen doesn't have enough free # memory to create a domain autoballoon=0 # full path of the lockfile used by xl during domain creation lockfile="/var/lock/xl" # default vif script vifscript="/etc/xen/scripts/vif-bridge" root@x49:/#
Ejecutamos update-grub y luego reiniciamos
root@x49:/# update-grub Generating grub.cfg ... Found linux image: /boot/vmlinuz-3.2.0-0.bpo.4-amd64 Found initrd image: /boot/initrd.img-3.2.0-0.bpo.4-amd64 Found linux image: /boot/vmlinuz-3.2.0-0.bpo.4-amd64 Found initrd image: /boot/initrd.img-3.2.0-0.bpo.4-amd64 Found linux image: /boot/vmlinuz-2.6.32-5-amd64 Found initrd image: /boot/initrd.img-2.6.32-5-amd64 Found linux image: /boot/vmlinuz-3.2.0-0.bpo.4-amd64 Found initrd image: /boot/initrd.img-3.2.0-0.bpo.4-amd64 done root@x49:/#
Chequeamos que este corriendo el hypervisor
root@x49:/# xl list Name ID Mem VCPUs State Time(s) Domain-0 0 1023 2 r----- 12.5 root@x49:/#
En este primer articulo hemos instalado el Dom0 de XEN que usaremos en próximas entradas
About Ricardo Marcelo Alvarez
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