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<div class="moz-text-flowed" style="font-family: -moz-fixed;
font-size: 14px;" lang="x-western">I'm trying to get started
with Xen and thought I'd do a simple install Fedora 18 as a DomU
under a Fedora 18 Dom0. Unfortunately this is not working for
me.<br>
<br>
It appears to boot the kernel fine, but then complains that it
can't find "/dev/root". I presume that this would be a specific
root image for the Fedora installer?<br>
<br>
The logs indicate that the kernel command line is empty.
Apparently there should be something in there (maybe
"root=/dev/xvda") but I am not sure how to achieve this. I would
have expected virt-install to do this for me, though.<br>
<br>
Can someone please let me know what I am doing wrong? (details
of what I am trying are below).<br>
<br>
Also, I had to manually start "xend" to get this far. Is this
normal? It didn't appear in the services in /etc/rc.d/init.d<br>
<br>
<br>
Thank you <br>
<br>
<br>
I created a 20GB logical volume /dev/fedora_dhcp1/xen1 <br>
I mounted the Fedora 18 installation ISO into /mnt/install (-t
iso9660 -o loop,ro)<br>
I created a bridge "brctl addbr br0" (I haven't added any
interfaces to it yet, I plan to sort out the network after
getting virtualisation working)<br>
I created the Xen DomU instance using the following command... <br>
[root@dhcp1 ~]# virt-install --paravirt --name xen1 --ram 256
--vcpus 1 -f /dev/fedora_dhcp1/xen1 --network bridge=br0
--location /mnt/install --graphics none <br>
<br>
Starting install... <br>
Retrieving file .treeinfo... | 2.4 kB 00:00:00 !!! <br>
Retrieving file vmlinuz-PAE... | 9.3 MB 00:00:00 !!! <br>
Retrieving file initrd-PAE.img... | 52 MB 00:00:00 !!! <br>
Creating domain... | 0 B 00:00:01 <br>
Connected to domain xen1 <br>
Escape character is ^] [ 0.000000] Reserving virtual address
space above 0xf5800000 <br>
[ 0.000000] Initializing cgroup subsys cpuset <br>
[ 0.000000] Initializing cgroup subsys cpu <br>
[ 0.000000] Linux version 3.6.10-4.fc18.i686.PAE (mockbuild@)
(gcc version 4.7.2 20121109 (Red Hat 4.7.2-8) (GCC) ) #1 SMP Tue
Dec 11 18:15:08 UTC 2012 <br>
[ 0.000000] ACPI in unprivileged domain disabled <br>
[ 0.000000] e820: BIOS-provided physical RAM map: <br>
[ 0.000000] Xen: [mem 0x0000000000000000-0x000000000009ffff]
usable <br>
[ 0.000000] Xen: [mem 0x00000000000a0000-0x00000000000fffff]
reserved <br>
[ 0.000000] Xen: [mem 0x0000000000100000-0x00000000107fffff]
usable <br>
[ 0.000000] NX (Execute Disable) protection: active <br>
[ 0.000000] DMI not present or invalid. <br>
[ 0.000000] e820: last_pfn = 0x10800 max_arch_pfn = 0x1000000
<br>
[ 0.000000] init_memory_mapping: [mem 0x00000000-0x107fffff]
<br>
[ 0.000000] RAMDISK: [mem 0x0102f000-0x02a6cfff] <br>
[ 0.000000] 0MB HIGHMEM available. <br>
[ 0.000000] 264MB LOWMEM available. <br>
[ 0.000000] mapped low ram: 0 - 10800000 <br>
[ 0.000000] low ram: 0 - 10800000 <br>
[ 0.000000] Zone ranges: <br>
[ 0.000000] DMA [mem 0x00010000-0x00ffffff] <br>
[ 0.000000] Normal [mem 0x01000000-0x107fffff] <br>
[ 0.000000] HighMem empty <br>
[ 0.000000] Movable zone start for each node <br>
[ 0.000000] Early memory node ranges <br>
[ 0.000000] node 0: [mem 0x00010000-0x0009ffff] <br>
[ 0.000000] node 0: [mem 0x00100000-0x107fffff] <br>
[ 0.000000] Using APIC driver default <br>
[ 0.000000] SFI: Simple Firmware Interface v0.81 <a
class="moz-txt-link-freetext" href="http://simplefirmware.org">http://simplefirmware.org</a>
<br>
[ 0.000000] smpboot: Allowing 1 CPUs, 0 hotplug CPUs <br>
[ 0.000000] Local APIC disabled by BIOS -- you can enable it
with "lapic" <br>
[ 0.000000] APIC: disable apic facility <br>
[ 0.000000] APIC: switched to apic NOOP <br>
[ 0.000000] PM: Registered nosave memory: 00000000000a0000 -
0000000000100000 <br>
[ 0.000000] e820: [mem 0x10800000-0xffffffff] available for
PCI devices <br>
[ 0.000000] Booting paravirtualized kernel on Xen <br>
[ 0.000000] Xen version: 4.2.2 (preserve-AD) <br>
[ 0.000000] setup_percpu: NR_CPUS:32 nr_cpumask_bits:32
nr_cpu_ids:1 nr_node_ids:1 <br>
[ 0.000000] PERCPU: Embedded 14 pages/cpu @cfdde000 s34880 r0
d22464 u57344 <br>
[ 0.000000] Built 1 zonelists in Zone order, mobility
grouping on. Total pages: 66944 <br>
[ 0.000000] Kernel command line: <br>
[ 0.000000] PID hash table entries: 2048 (order: 1, 8192
bytes) <br>
[ 0.000000] Dentry cache hash table entries: 65536 (order: 6,
262144 bytes) <br>
[ 0.000000] Inode-cache hash table entries: 32768 (order: 5,
131072 bytes) <br>
[ 0.000000] __ex_table already sorted, skipping sort <br>
[ 0.000000] Initializing CPU#0 <br>
[ 0.000000] allocated 540544 bytes of page_cgroup <br>
[ 0.000000] please try 'cgroup_disable=memory' option if you
don't want memory cgroups <br>
[ 0.000000] Initializing HighMem for node 0
(00000000:00000000) <br>
[ 0.000000] Memory: 220784k/270336k available (5639k kernel
code, 49104k reserved, 2745k data, 656k init, 0k highmem) <br>
[ 0.000000] virtual kernel memory layout: <br>
[ 0.000000] fixmap : 0xf5296000 - 0xf57ff000 (5540 kB)
<br>
[ 0.000000] pkmap : 0xf4e00000 - 0xf5000000 (2048 kB)
<br>
[ 0.000000] vmalloc : 0xd1000000 - 0xf4dfe000 ( 573 MB)
<br>
[ 0.000000] lowmem : 0xc0000000 - 0xd0800000 ( 264 MB)
<br>
[ 0.000000] .init : 0xc0c31000 - 0xc0cd5000 ( 656 kB)
<br>
[ 0.000000] .data : 0xc0981f81 - 0xc0c30640 (2745 kB)
<br>
[ 0.000000] .text : 0xc0400000 - 0xc0981f81 (5639 kB)
<br>
[ 0.000000] SLUB: Genslabs=15, HWalign=128, Order=0-3,
MinObjects=0, CPUs=1, Nodes=1 <br>
[ 0.000000] Hierarchical RCU implementation. <br>
[ 0.000000] RCU restricting CPUs from NR_CPUS=32 to
nr_cpu_ids=1. <br>
[ 0.000000] NR_IRQS:2304 nr_irqs:256 16 <br>
[ 0.000000] Console: colour dummy device 80x25 <br>
[ 0.000000] console [tty0] enabled <br>
[ 0.000000] console [hvc0] enabled <br>
[ 0.000000] installing Xen timer for CPU 0 <br>
[ 0.000000] tsc: Detected 3192.140 MHz processor <br>
[ 0.000999] Calibrating delay loop (skipped), value
calculated using timer frequency.. 6384.28 BogoMIPS
(lpj=3192140) <br>
[ 0.000999] pid_max: default: 32768 minimum: 301 <br>
[ 0.000999] Security Framework initialized <br>
[ 0.000999] SELinux: Initializing. <br>
[ 0.000999] Mount-cache hash table entries: 512 <br>
[ 0.000999] Initializing cgroup subsys cpuacct <br>
[ 0.000999] Initializing cgroup subsys memory <br>
[ 0.000999] Initializing cgroup subsys devices <br>
[ 0.000999] Initializing cgroup subsys freezer <br>
[ 0.000999] Initializing cgroup subsys net_cls <br>
[ 0.000999] Initializing cgroup subsys blkio <br>
[ 0.000999] Initializing cgroup subsys perf_event <br>
[ 0.000999] CPU: Physical Processor ID: 0 <br>
[ 0.000999] CPU: Processor Core ID: 0 <br>
[ 0.000999] Last level iTLB entries: 4KB 64, 2MB 64, 4MB 64 <br>
[ 0.000999] Last level dTLB entries: 4KB 64, 2MB 0, 4MB 64 <br>
[ 0.000999] tlb_flushall_shift is 0x6 <br>
[ 0.001032] SMP alternatives: switching to UP code <br>
[ 0.081199] Freeing SMP alternatives: 24k freed <br>
[ 0.081250] ftrace: allocating 23058 entries in 46 pages <br>
[ 0.090144] Performance Events: unsupported Netburst CPU
model 4 no PMU driver, software events only. <br>
[ 0.091214] NMI watchdog: disabled (cpu0): hardware events
not enabled <br>
[ 0.091321] Brought up 1 CPUs <br>
[ 0.091630] devtmpfs: initialized <br>
[ 0.093188] atomic64 test passed for i586+ platform with CX8
and with SSE <br>
[ 0.093282] Grant tables using version 2 layout. <br>
[ 0.093359] Grant table initialized <br>
[ 0.111982] RTC time: 165:165:165, date: 165/165/65 <br>
[ 0.112096] NET: Registered protocol family 16 <br>
[ 0.113006] PCI: setting up Xen PCI frontend stub <br>
[ 0.114351] bio: create slab <bio-0> at 0 <br>
[ 0.114467] ACPI: Interpreter disabled. <br>
[ 0.114509] xen/balloon: Initialising balloon driver. <br>
[ 0.116027] xen-balloon: Initialising balloon driver. <br>
[ 0.116153] vgaarb: loaded <br>
[ 0.116362] SCSI subsystem initialized <br>
[ 0.116594] usbcore: registered new interface driver usbfs <br>
[ 0.116620] usbcore: registered new interface driver hub <br>
[ 0.117036] usbcore: registered new device driver usb <br>
[ 0.117254] PCI: System does not support PCI <br>
[ 0.117271] PCI: System does not support PCI <br>
[ 0.117461] NetLabel: Initializing <br>
[ 0.117473] NetLabel: domain hash size = 128 <br>
[ 0.117481] NetLabel: protocols = UNLABELED CIPSOv4 <br>
[ 0.117501] NetLabel: unlabeled traffic allowed by default <br>
[ 0.117528] Switching to clocksource xen <br>
[ 0.128867] pnp: PnP ACPI: disabled <br>
[ 0.131836] NET: Registered protocol family 2 <br>
[ 0.132040] TCP established hash table entries: 16384 (order:
5, 131072 bytes) <br>
[ 0.132148] TCP bind hash table entries: 16384 (order: 5,
131072 bytes) <br>
[ 0.132223] TCP: Hash tables configured (established 16384
bind 16384) <br>
[ 0.132256] TCP: reno registered <br>
[ 0.132266] UDP hash table entries: 256 (order: 1, 8192
bytes) <br>
[ 0.132280] UDP-Lite hash table entries: 256 (order: 1, 8192
bytes) <br>
[ 0.132359] NET: Registered protocol family 1 <br>
[ 0.132609] Unpacking initramfs... <br>
[ 5.400424] Freeing initrd memory: 26872k freed <br>
[ 5.420100] platform rtc_cmos: registered platform RTC device
(no PNP device found) <br>
[ 5.420423] apm: BIOS not found. <br>
[ 5.420790] Initialise module verification <br>
[ 5.420887] audit: initializing netlink socket (disabled) <br>
[ 5.420926] type=2000 audit(1381867979.607:1): initialized <br>
[ 5.443018] HugeTLB registered 2 MB page size, pre-allocated
0 pages <br>
[ 5.445007] VFS: Disk quotas dquot_6.5.2 <br>
[ 5.445162] Dquot-cache hash table entries: 1024 (order 0,
4096 bytes) <br>
[ 5.445893] msgmni has been set to 483 <br>
[ 5.447183] alg: No test for stdrng (krng) <br>
[ 5.447213] NET: Registered protocol family 38 <br>
[ 5.447231] Key type asymmetric registered <br>
[ 5.447245] Asymmetric key parser 'x509' registered <br>
[ 5.447349] Block layer SCSI generic (bsg) driver version 0.4
loaded (major 252) <br>
[ 5.447457] io scheduler noop registered <br>
[ 5.447476] io scheduler deadline registered <br>
[ 5.447512] io scheduler cfq registered (default) <br>
[ 5.447736] pci_hotplug: PCI Hot Plug PCI Core version: 0.5 <br>
[ 5.447789] pciehp: PCI Express Hot Plug Controller Driver
version: 0.4 <br>
[ 5.447805] acpiphp: ACPI Hot Plug PCI Controller Driver
version: 0.5 <br>
[ 5.448701] Serial: 8250/16550 driver, 4 ports, IRQ sharing
enabled <br>
[ 5.449418] Non-volatile memory driver v1.3 <br>
[ 5.449436] Linux agpgart interface v0.103 <br>
[ 5.450770] loop: module loaded <br>
[ 5.451003] libphy: Fixed MDIO Bus: probed <br>
[ 5.451195] ehci_hcd: USB 2.0 'Enhanced' Host Controller
(EHCI) Driver <br>
[ 5.451245] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI)
Driver <br>
[ 5.451283] uhci_hcd: USB Universal Host Controller Interface
driver <br>
[ 5.451406] usbcore: registered new interface driver
usbserial <br>
[ 5.451447] usbcore: registered new interface driver
usbserial_generic <br>
[ 5.451483] USB Serial support registered for generic <br>
[ 5.451500] usbserial: USB Serial Driver core <br>
[ 5.451563] i8042: PNP: No PS/2 controller found. Probing
ports directly. <br>
[ 5.452551] mousedev: PS/2 mouse device common for all mice <br>
[ 5.512978] rtc_cmos rtc_cmos: rtc core: registered rtc_cmos
as rtc0 <br>
[ 5.513129] rtc_cmos: probe of rtc_cmos failed with error -38
<br>
[ 5.513270] device-mapper: uevent: version 1.0.3 <br>
[ 5.513381] device-mapper: ioctl: 4.23.0-ioctl (2012-07-25)
initialised: <a class="moz-txt-link-abbreviated"
href="mailto:dm-devel@redhat.com">dm-devel@redhat.com</a> <br>
[ 5.513464] EFI Variables Facility v0.08 2004-May-17 <br>
[ 5.513641] usbcore: registered new interface driver usbhid <br>
[ 5.513652] usbhid: USB HID core driver <br>
[ 5.513686] drop_monitor: Initializing network drop monitor
service <br>
[ 5.513818] ip_tables: (C) 2000-2006 Netfilter Core Team <br>
[ 5.513897] TCP: cubic registered <br>
[ 5.513907] Initializing XFRM netlink socket <br>
[ 5.514097] NET: Registered protocol family 10 <br>
[ 5.514332] mip6: Mobile IPv6 <br>
[ 5.514343] NET: Registered protocol family 17 <br>
[ 5.514370] Using IPI No-Shortcut mode <br>
[ 5.514529] Loading module verification certificates <br>
[ 5.519112] MODSIGN: Loaded cert 'Fedora kernel signing key:
de2965de66714570abd7e5852342fe03dd0c1ba7' <br>
[ 5.519152] registered taskstats version 1 <br>
[ 5.519178] XENBUS: Device with no driver: device/vbd/51712 <br>
[ 5.519189] XENBUS: Device with no driver: device/vif/0 <br>
[ 5.519272] Magic number: 1:252:3141 <br>
[ 5.519319] drivers/rtc/hctosys.c: unable to open rtc device
(rtc0) <br>
[ 5.519873] Freeing unused kernel memory: 656k freed <br>
[ 5.523151] Write protecting the kernel text: 5640k <br>
[ 5.524299] Write protecting the kernel read-only data: 2212k
<br>
[ 5.524315] NX-protecting the kernel data: 4600k <br>
[ 5.533912] systemd[1]: systemd 195 running in system mode.
(+PAM +LIBWRAP +AUDIT +SELINUX +IMA +SYSVINIT +LIBCRYPTSETUP
+GCRYPT +ACL +XZ; fedora) <br>
[ 5.534049] systemd[1]: Running in initial RAM disk. <br>
<br>
Welcome to Fedora 18 (Spherical Cow)
dracut-024-18.git20130102.fc18 (Initramfs)! <br>
<br>
[ 5.534462] systemd[1]: No hostname configured. <br>
[ 5.534488] systemd[1]: Set hostname to <localhost>. <br>
[ 5.534651] systemd[1]: Initializing machine ID from random
generator. <br>
[ 5.561666] systemd[1]: Starting Encrypted Volumes. <br>
[ OK ] Reached target Encrypted Volumes. <br>
[ 5.601607] systemd[1]: Reached target Encrypted Volumes. <br>
[ 5.601835] systemd[1]: Starting udev Kernel Socket. <br>
[ OK ] Listening on udev Kernel Socket. <br>
[ 5.602206] systemd[1]: Listening on udev Kernel Socket. <br>
[ 5.602403] systemd[1]: Starting udev Control Socket. <br>
[ OK ] Listening on udev Control Socket. <br>
[ 5.602748] systemd[1]: Listening on udev Control Socket. <br>
[ 5.602819] systemd[1]: Starting Journal Socket. <br>
[ OK ] Listening on Journal Socket. <br>
[ 5.603217] systemd[1]: Listening on Journal Socket. <br>
[ 5.603297] systemd[1]: Starting dracut cmdline hook... <br>
Starting dracut cmdline hook... <br>
[ 5.605425] systemd[1]: Started Load Kernel Modules. <br>
[ 5.605554] systemd[1]: Starting Journal Service... <br>
Starting Journal Service... <br>
[ OK ] Started Journal Service. <br>
[ 5.648995] systemd[1]: Started Journal Service. <br>
[ 5.651273] systemd[1]: Starting Sockets. <br>
[ OK ] Reached target Sockets. <br>
[ 5.651494] systemd[1]: Reached target Sockets. <br>
[ 5.651570] systemd[1]: Starting Swap. <br>
[ OK ] Reached target Swap. <br>
[ 5.651769] systemd[1]: Reached target Swap. <br>
[ 5.651850] systemd[1]: Starting Local File Systems. <br>
[ OK ] Reached target Local File Systems. <br>
[ 5.652027] systemd[1]: Reached target Local File Systems. <br>
[ 6.009250] BIOS EDD facility v0.16 2004-Jun-25, 0 devices
found <br>
[ 6.009278] EDD information not available. <br>
[ OK ] Started dracut cmdline hook. <br>
Starting Setup Virtual Console... <br>
Starting dracut pre-udev hook... <br>
[ OK ] Started Setup Virtual Console. <br>
[ OK ] Reached target System Initialization. <br>
[ 6.726690] squashfs: version 4.0 (2009/01/31) Phillip
Lougher <br>
[ 6.737807] Loading iSCSI transport class v2.0-870. <br>
[ 6.754446] iscsi: registered transport (tcp) <br>
[ 6.764264] alua: device handler registered <br>
[ 6.773860] emc: device handler registered <br>
[ 6.783584] hp_sw: device handler registered <br>
[ 6.793520] rdac: device handler registered <br>
[ 6.805629] Floppy drive(s): fd0 is unknown type 15 (usb?),
fd1 is unknown type 15 (usb?) <br>
[ 6.805674] floppy0: Unable to grab IRQ6 for the floppy
driver <br>
[ 6.816022] BIOS EDD facility v0.16 2004-Jun-25, 0 devices
found <br>
[ 6.816054] EDD information not available. <br>
[ 6.830877] No iBFT detected. <br>
[ 6.840605] md: raid0 personality registered for level 0 <br>
[ 6.852284] md: raid1 personality registered for level 1 <br>
[ 6.862087] async_tx: api initialized (async) <br>
[ 6.867605] xor: automatically using best checksumming
function: <br>
[ 6.877077] pIII_sse : 1932.000 MB/sec <br>
[ 6.905090] raid6: mmxx1 1863 MB/s <br>
[ 6.922093] raid6: mmxx2 2136 MB/s <br>
[ 6.939094] raid6: sse1x1 1066 MB/s <br>
[ 6.956097] raid6: sse1x2 2078 MB/s <br>
[ 6.973082] raid6: sse2x1 2164 MB/s <br>
[ 6.990076] raid6: sse2x2 3160 MB/s <br>
[ 6.990093] raid6: using algorithm sse2x2 (3160 MB/s) <br>
[ 6.990109] raid6: using intx1 recovery algorithm <br>
[ 7.016396] md: raid6 personality registered for level 6 <br>
[ 7.016421] md: raid5 personality registered for level 5 <br>
[ 7.016438] md: raid4 personality registered for level 4 <br>
[ 7.037861] md: raid10 personality registered for level 10 <br>
[ 7.048264] md: linear personality registered for level -1 <br>
[ 7.076403] device-mapper: multipath: version 1.5.0 loaded <br>
[ 7.086880] device-mapper: multipath round-robin: version
1.0.0 loaded <br>
[ 7.229246] RPC: Registered named UNIX socket transport
module. <br>
[ 7.229270] RPC: Registered udp transport module. <br>
[ 7.229279] RPC: Registered tcp transport module. <br>
[ 7.229287] RPC: Registered tcp NFSv4.1 backchannel transport
module. <br>
[ OK ] Started dracut pre-udev hook. <br>
Starting udev Kernel Device Manager... <br>
[ OK ] Started udev Kernel Device Manager. <br>
Starting dracut pre-trigger hook... <br>
[ 7.560135] systemd-udevd[225]: starting version 195 <br>
[ OK ] Started dracut pre-trigger hook. <br>
Starting udev Coldplug all Devices... <br>
[ OK ] Started udev Coldplug all Devices. <br>
Starting Show Plymouth Boot Screen... <br>
Starting dracut initqueue hook... <br>
[ 8.228185] Disabling lock debugging due to kernel taint <br>
[ 8.230621] Initialising Xen virtual ethernet driver. <br>
[ 8.263474] blkfront: xvda: flush diskcache: enabled <br>
[ 8.293282] xvda: unknown partition table <br>
[ OK ] Started Show Plymouth Boot Screen. <br>
[ OK ] Reached target Basic System. <br>
dracut-initqueue[278]: Warning: Could not boot. <br>
[ OK ] Started Show Plymouth Boot Screen. <br>
[ OK ] Reached target Basic System. <br>
dracut-initqueue[278]: Warning: Could not boot. <br>
dracut-initqueue[278]: Warning: /dev/root does not exist <br>
<br>
<br>
Entering emergency mode. Exit the shell to continue. <br>
Type "journalctl" to view system logs. <br>
<br>
dracut:/# <br>
dracut:/# cat /proc/cmdline <br>
<br>
dracut:/# <br>
<br>
<br>
Entering emergency mode. Exit the shell to continue. <br>
Type "journalctl" to view system logs. <br>
<br>
dracut:/# <br>
<br>
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