2007 - Debian 4 - Xen dom0

|=----------------------------------=[ XEN ]=------------------------------=|
+---------------------------------------------------------------------------+
|                                                                           |
|                               XEN - dom0 (vmware)                         |
|                                 Debian 4.0 Etch                           |
|                                                                           |
+---------------------------------------------------------------------------+
|=-------------------------------=[ BH 2007 ]=-----------------------------=|

        CPU
        ---
        * Jeden alebo viac 64bit x86 procesor(ov)
        * minimum - 1.5 GHz
        * odporucane - 2 GHz alebo multicore

        RAM
        ---
        * minimum - 1 GB
        * odporucane - 2 GB alebo viac

        DISK
        ----
        Lokalne pripojeny datovy sklad (PATA, SATA, SCSI)
        * minimum - 16 GB diskoveho priestoru
        * odporucane - 60 GB a viac

        SIET
        ----
        100 Mbit/s alebo rychlejsia sietova karta.
        Gigabitova sietova karta je odporucana pre urychlenie konverzie Physical2Virtual a
        datovych prenosov pri exporte/importe a pre live relocation (zive premiestnenie)
        Virtualnych strojov.

        WMWARE - 20 GB disk
        -------------------
        /boot         - 200 MB
        swap          - 1,5 GB
        /root (LVM)   - 8 GB
        /x1-www (LVM) - 3 GB
        /x1-db (LVM)  - 3 GB

        # cat /etc/fstab
        ----------------
        /dev/mapper/system-root         /               ext3            defaults,errors=remount-ro 0       1
        /dev/sda1                       /boot           ext3            defaults        0       2
        /dev/mapper/system-x1--www      /x1-www         ext3            defaults        0       2
        /dev/mapper/system-x2--db       /x2-db          ext3            defaults        0       2
        /dev/mapper/system-swap         none            swap            sw              0       0
        /dev/hdc                        /media/cdrom0   udf,iso9660     user,noauto     0       0
        /dev/fd0                        /media/floppy0  auto            rw,user,noauto  0       0
        ---------------- END /etc/fstab

        # apt-get install ssh mc

        V balickovom repozitari Debianu Etch sa nachadzaju 3 verzie XEN jadier:
        -----------------------------------------------------------------------
        a/ s podporou PAE (xen-linux-system-2.6.18-5-xen-686)
        b/ bez podpory PAE (linux-image-2.6.18-5-xen)
        c/ XEN + vserver ()

        PAE: http://en.wikipedia.org/wiki/Physical_Address_Extension

        Pri instalacii XEN jadra treba davat pozor, aby bolo ianstalovane spravne jadro.
        Ak sa nainstaluje zla verzia jadra, system vobec nenabehne a skonci s chybovou hlaskou:
        'Mismatch between Xen and DOM0 kernel'

        a/ Install XEN-PAE (tested)
        ---------------------------
        Aj ked je PAE urcene pre systemy s pamatou vacsou ako 4GB pouzijeme toto jadro, kedze
        standardne debian jadro je PAE a pri pouzity nonPAE XEN jadra vznikol mismatch problem.

        # apt-get install xen-linux-system-2.6.18-5-xen-686
        # apt-get install libc6-xen
        # init 6

        Problem1 - pri starte systemu s XEN jadrom sa objavili velke mnozstvo nasledujucich hlasok
        ------------------------------------------------------------------------------------------
        '4gb seg fixup, process sshd (pid 1162), cs:ip 73:008d8cfc'
        'printk: 185714 messages suppressed.'

        Riesenie1 - nainstalujeme XEN GLIBC (libc6-xen)
        -----------------------------------------------
        # apt-get install libc6-xen

        b/ Install XEN bez PAE
        ----------------------
        Ak chceme XEN jadro bez podpory PAE treba separatne nainstalovat tieto balicky:
        - linux-image-2.6.18-5-xen kernel
        - xen-utils
        - xen-hypervisor

        c/ Install XEN + vserver
        ------------------------
        Kedze nechceme mat v systeme bordel, nebudeme mixovat virtualizacne nastroje a tak toto
        jadro nebudeme pouzivat.

        # apt-get install bridge-utils

        # nano /etc/xen/xend-config.sxp
        -------------------------------
        (network-script network-bridge)

        XEN na DEBIANe dom0
        -------------------
        http://www.howtoforge.com/debian_etch_xen_3.1
        http://www.jejik.com/articles/2007/03/a_test_drive_of_debian_etch_xen/