Re: [Xen-users] VM Won't start

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

On Thu, 2015-04-16 at 10:58 -0700, Steffan A. Cline wrote:
> I have a VM that was working and then suddenly shutdown. I can't get
> it to start back up.
> 
> 
> Anyone have suggestions?

At a guess it looks like you have a distro kernel which requires an
initrd to provide the drivers for the root filesystem but I don't see
any sign of the initrd being loaded. Perhaps your grub configuration has
become incorrect somewhere along the line?

You can press e to edit the grub entry and check what it looks like etc.

I don't think the issue is that your initramfs is loaded but somehow
corrupt because I think there would be messages logged about that. If
the grub config looks correct then this might be something to consider
though.

Ian.

>  Fsck says the volume is fine.
> 
> 
> Starting up mhloans.hldns.xen ..
> .. failed :
> PTY PID: 11721
> Xen Minimal OS!
>   start_info: 0x210f000(VA)
>     nr_pages: 0x2ee000
>   shared_inf: 0x7f55c000(MA)
>      pt_base: 0x2112000(VA)
> nr_pt_frames: 0x15
>     mfn_list: 0x99f000(VA)
>    mod_start: 0x0(VA)
>      mod_len: 0
>        flags: 0x0
>     cmd_line: (hd0)/boot/grub/grub.conf
>   stack:      0x95e900-0x97e900
> MM: Init
>       _text: 0x0(VA)
>      _etext: 0x715c4(VA)
>    _erodata: 0x8b000(VA)
>      _edata: 0x90c60(VA)
> stack start: 0x95e900(VA)
>        _end: 0x99ef00(VA)
>   start_pfn: 212a
>     max_pfn: 2ee000
> Mapping memory range 0x2400000 - 0x2ee000000
> setting 0x0-0x8b000 readonly
> skipped 0x1000
> MM: Initialise page allocator for 3893000(3893000)-2ee000000(2ee000000)
> MM: done
> Demand map pfns at 2ee001000-22ee001000.
> Heap resides at 22ee002000-42ee002000.
> Initialising timer interface
> Initialising console ... done.
> gnttab_table mapped at 0x2ee001000.
> Initialising scheduler
> Thread "Idle": pointer: 0x22ee002050, stack: 0x2ed080000
> Thread "xenstore": pointer: 0x22ee002800, stack: 0x2ed090000
> xenbus initialised on irq 1 mfn 0x66c129
> Dummy main: start_info=0x97ea00
> Thread "main": pointer: 0x22ee002fb0, stack: 0x2ed0a0000
> "main" "(hd0)/boot/grub/grub.conf" 
> vbd 51713 is hd0
> ******************* BLKFRONT for device/vbd/51713 **********
> 
> 
> backend at /local/domain/0/backend/vbd/13/51713
> 209715200 sectors of 512 bytes
> **************************
> vbd 51714 is hd1
> ******************* BLKFRONT for device/vbd/51714 **********
> 
> 
> backend at /local/domain/0/backend/vbd/13/51714
> 8388608 sectors of 512 bytes
> **************************
> 
> 
>     GNU GRUB  version 0.97  (12288000K lower / 0K upper memory)
> 
> 
> 
> +-------------------------------------------------------------------------+||||||||||||||||||||||||+-------------------------------------------------------------------------+
> 
>     Use the ^ and v keys to select which entry is highlighted.
> 
>     Press enter to boot the selected OS, 'e' to edit the
> 
>     commands before booting, or 'c' for a command-line.  
> CentOS Linux (3.10.0-229.1.2.el7.x86_64) 7 (Core)                       
>  CentOS Linux (3.10.0-123.20.1.el7.x86_64) 7 (Core)        
>                CentOS Linux (3.10.0-123.6.3.el7.x86_64) 7 
> (Core)                        
> vmlinuz-3.10.0-123.4.4.el7.x86_64                                       
>                                                            
>                                                           
>                                                          
>                                                          
>                                                              
>                                                          
>                                                          
>                                                          
>                                                          
>                                                                 
>   The highlighted entry will be booted 
> automatically in 10 seconds.    The highlighted entry will be 
> booted automatically in 9 seconds.    The highlighted entry 
> will be booted automatically in 8 seconds.    The highlighted 
> entry will be booted automatically in 7 seconds.    The 
> highlighted entry will be booted automatically in 6 seconds.    
> The highlighted entry will be booted automatically in 5 seconds.   
>  The highlighted entry will be booted automatically in 4 
> seconds.    The highlighted entry will be booted automatically 
> in 3 seconds.    The highlighted entry will be booted 
> automatically in 2 seconds.    The highlighted entry will be 
> booted automatically in 1 seconds.     Booting 'CentOS Linux 
> (3.10.0-229.1.2.el7.x86_64) 7 (Core)'
> 
> 
> 
> root (hd0)
> 
>  Filesystem type is ext2fs, using whole disk
> 
> kernel /boot/vmlinuz-3.10.0-229.1.2.el7.x86_64 console=hvc0 xencons=tty0 
> root=/
> 
> dev/xvda1 ro LANG=en_US.UTF-8
> 
> 
> 
> close blk: backend=/local/domain/0/backend/vbd/13/51713 node=device/vbd/51713
> close blk: backend=/local/domain/0/backend/vbd/13/51714 node=device/vbd/51714
> [    0.000000] Initializing cgroup subsys cpuset
> [    0.000000] Initializing cgroup subsys cpu
> [    0.000000] Initializing cgroup subsys cpuacct
> [    0.000000] Linux version 3.10.0-229.1.2.el7.x86_64 
> (builder@xxxxxxxxxxxxxxxxxxxxxxx) (gcc version 4.8.2 20140120 (Red Hat 
> 4.8.2-16) (GCC) ) #1 SMP Fri Mar 27 03:04:26 UTC 2015
> [    0.000000] Command line: console=hvc0 xencons=tty0 root=/dev/xvda1 ro 
> LANG=en_US.UTF-8
> [    0.000000] ACPI in unprivileged domain disabled
> [    0.000000] e820: BIOS-provided physical RAM map:
> [    0.000000] Xen: [mem 0x0000000000000000-0x000000000009ffff] usable
> [    0.000000] Xen: [mem 0x00000000000a0000-0x00000000000fffff] reserved
> [    0.000000] Xen: [mem 0x0000000000100000-0x00000002ee7fffff] usable
> [    0.000000] NX (Execute Disable) protection: active
> [    0.000000] DMI not present or invalid.
> [    0.000000] No AGP bridge found
> [    0.000000] e820: last_pfn = 0x2ee800 max_arch_pfn = 0x400000000
> [    0.000000] e820: last_pfn = 0x100000 max_arch_pfn = 0x400000000
> [    0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]
> [    0.000000] init_memory_mapping: [mem 0x2ede00000-0x2edffffff]
> [    0.000000] init_memory_mapping: [mem 0x2ec000000-0x2eddfffff]
> [    0.000000] init_memory_mapping: [mem 0x280000000-0x2ebffffff]
> [    0.000000] init_memory_mapping: [mem 0x00100000-0x27fffffff]
> [    0.000000] init_memory_mapping: [mem 0x2ee000000-0x2ee7fffff]
> [    0.000000] NUMA turned off
> [    0.000000] Faking a node at [mem 0x0000000000000000-0x00000002ee7fffff]
> [    0.000000] Initmem setup node 0 [mem 0x00000000-0x2ee7fffff]
> [    0.000000]   NODE_DATA [mem 0x2ec87e000-0x2ec8a4fff]
> [    0.000000] Zone ranges:
> [    0.000000]   DMA      [mem 0x00001000-0x00ffffff]
> [    0.000000]   DMA32    [mem 0x01000000-0xffffffff]
> [    0.000000]   Normal   [mem 0x100000000-0x2ee7fffff]
> [    0.000000] Movable zone start for each node
> [    0.000000] Early memory node ranges
> [    0.000000]   node   0: [mem 0x00001000-0x0009ffff]
> [    0.000000]   node   0: [mem 0x00100000-0x2ee7fffff]
> [    0.000000] SFI: Simple Firmware Interface v0.81 http://simplefirmware.org
> [    0.000000] smpboot: Allowing 2 CPUs, 0 hotplug CPUs
> [    0.000000] No local APIC present
> [    0.000000] APIC: disable apic facility
> [    0.000000] APIC: switched to apic NOOP
> [    0.000000] PM: Registered nosave memory: [mem 0x000a0000-0x000fffff]
> [    0.000000] e820: cannot find a gap in the 32bit address range
> [    0.000000] e820: PCI devices with unassigned 32bit BARs may break!
> [    0.000000] e820: [mem 0x2ee900000-0x2eecfffff] available for PCI devices
> [    0.000000] Booting paravirtualized kernel on Xen
> [    0.000000] Xen version: 4.2.5 (preserve-AD)
> [    0.000000] setup_percpu: NR_CPUS:5120 nr_cpumask_bits:2 nr_cpu_ids:2 
> nr_node_ids:1
> [    0.000000] PERCPU: Embedded 28 pages/cpu @ffff8802ec600000 s82752 r8192 
> d23744 u1048576
> [    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total 
> pages: 3025898
> [    0.000000] Policy zone: Normal
> [    0.000000] Kernel command line: console=hvc0 xencons=tty0 root=/dev/xvda1 
> ro LANG=en_US.UTF-8
> [    0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
> [    0.000000] Checking aperture...
> [    0.000000] No AGP bridge found
> [    0.000000] Memory: 12030440k/12296192k available (6244k kernel code, 388k 
> absent, 265364k reserved, 4178k data, 1604k init)
> [    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
> [    0.000000] Hierarchical RCU implementation.
> [    0.000000]        RCU restricting CPUs from NR_CPUS=5120 to nr_cpu_ids=2.
> [    0.000000]        Experimental no-CBs for all CPUs
> [    0.000000]        Experimental no-CBs CPUs: 0-1.
> [    0.000000] NR_IRQS:327936 nr_irqs:288 16
> [    0.000000] Console: colour dummy device 80x25
> [    0.000000] console [tty0] enabled
> [    0.000000] console [hvc0] enabled
> [    0.000000] allocated 49283072 bytes of page_cgroup
> [    0.000000] please try 'cgroup_disable=memory' option if you don't want 
> memory cgroups
> [    0.000000] installing Xen timer for CPU 0
> [    0.000000] tsc: Detected 2660.086 MHz processor
> [    0.001000] Calibrating delay loop (skipped), value calculated using timer 
> frequency.. 5320.17 BogoMIPS (lpj=2660086)
> [    0.001000] pid_max: default: 32768 minimum: 301
> [    0.001000] Security Framework initialized
> [    0.001000] SELinux:  Initializing.
> [    0.003344] Dentry cache hash table entries: 2097152 (order: 12, 16777216 
> bytes)
> [    0.012856] Inode-cache hash table entries: 1048576 (order: 11, 8388608 
> bytes)
> [    0.016840] Mount-cache hash table entries: 4096
> [    0.017266] Initializing cgroup subsys memory
> [    0.017295] Initializing cgroup subsys devices
> [    0.017301] Initializing cgroup subsys freezer
> [    0.017306] Initializing cgroup subsys net_cls
> [    0.017312] Initializing cgroup subsys blkio
> [    0.017316] Initializing cgroup subsys perf_event
> [    0.017322] Initializing cgroup subsys hugetlb
> [    0.017396] CPU: Physical Processor ID: 0
> [    0.017401] CPU: Processor Core ID: 0
> [    0.017412] Last level iTLB entries: 4KB 128, 2MB 4, 4MB 4
> [    0.017412] Last level dTLB entries: 4KB 256, 2MB 0, 4MB 32
> [    0.017412] tlb_flushall_shift: -1
> [    0.044561] ftrace: allocating 23910 entries in 94 pages
> [    0.050161] cpu 0 spinlock event irq 17
> [    0.050241] Performance Events: unsupported p6 CPU model 15 no PMU driver, 
> software events only.
> [    0.052024] NMI watchdog: disabled (cpu0): hardware events not enabled
> [    0.052142] installing Xen timer for CPU 1
> [    0.052163] cpu 1 spinlock event irq 24
> [    0.052246] SMP alternatives: switching to SMP code
> [    0.077527] Brought up 2 CPUs
> [    0.078023] devtmpfs: initialized
> [    0.083438] EVM: security.selinux
> [    0.083447] EVM: security.ima
> [    0.083451] EVM: security.capability
> [    0.085080] atomic64 test passed for x86-64 platform with CX8 and with SSE
> [    0.085143] xen:grant_table: Grant tables using version 2 layout
> [    0.085174] Grant table initialized
> [    0.085351] NET: Registered protocol family 16
> [    0.086598] PCI: setting up Xen PCI frontend stub
> [    0.088112] ACPI: Interpreter disabled.
> [    0.089026] xen:balloon: Initialising balloon driver
> [    0.091032] xen_balloon: Initialising balloon driver
> [    0.091067] vgaarb: loaded
> [    0.091135] SCSI subsystem initialized
> [    0.091200] usbcore: registered new interface driver usbfs
> [    0.091217] usbcore: registered new interface driver hub
> [    0.092023] usbcore: registered new device driver usb
> [    0.092159] PCI: System does not support PCI
> [    0.092167] PCI: System does not support PCI
> [    0.092332] NetLabel: Initializing
> [    0.092340] NetLabel:  domain hash size = 128
> [    0.092346] NetLabel:  protocols = UNLABELED CIPSOv4
> [    0.092370] NetLabel:  unlabeled traffic allowed by default
> [    0.092403] Switching to clocksource xen
> [    0.102622] pnp: PnP ACPI: disabled
> [    0.108146] NET: Registered protocol family 2
> [    0.108613] TCP established hash table entries: 131072 (order: 8, 1048576 
> bytes)
> [    0.109367] TCP bind hash table entries: 65536 (order: 8, 1048576 bytes)
> [    0.109818] TCP: Hash tables configured (established 131072 bind 65536)
> [    0.109909] TCP: reno registered
> [    0.109980] UDP hash table entries: 8192 (order: 6, 262144 bytes)
> [    0.110197] UDP-Lite hash table entries: 8192 (order: 6, 262144 bytes)
> [    0.110442] NET: Registered protocol family 1
> [    0.110690] platform rtc_cmos: registered platform RTC device (no PNP 
> device found)
> [    0.111189] microcode: CPU0 sig=0x6fb, pf=0x40, revision=0xbc
> [    0.111219] microcode: CPU1 sig=0x6fb, pf=0x40, revision=0xbc
> [    0.111304] microcode: Microcode Update Driver: v2.00 
> <tigran@xxxxxxxxxxxxxxxxxxxx>, Peter Oruba
> [    0.111767] futex hash table entries: 512 (order: 3, 32768 bytes)
> [    0.111808] Initialise system trusted keyring
> [    0.111881] audit: initializing netlink socket (disabled)
> [    0.111901] type=2000 audit(1429205534.544:1): initialized
> [    0.139853] HugeTLB registered 2 MB page size, pre-allocated 0 pages
> [    0.141618] zbud: loaded
> [    0.141879] VFS: Disk quotas dquot_6.5.2
> [    0.141929] Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
> [    0.142196] msgmni has been set to 23496
> [    0.142269] Key type big_key registered
> [    0.143944] alg: No test for stdrng (krng)
> [    0.143986] NET: Registered protocol family 38
> [    0.144004] Key type asymmetric registered
> [    0.144012] Asymmetric key parser 'x509' registered
> [    0.144053] Block layer SCSI generic (bsg) driver version 0.4 loaded 
> (major 252)
> [    0.144157] io scheduler noop registered
> [    0.144164] io scheduler deadline registered (default)
> [    0.144195] io scheduler cfq registered
> [    0.144290] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
> [    0.144310] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
> [    0.145192] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
> [    0.145994] Non-volatile memory driver v1.3
> [    0.146033] Linux agpgart interface v0.103
> [    0.146157] crash memory driver: version 1.1
> [    0.146200] rdac: device handler registered
> [    0.146301] hp_sw: device handler registered
> [    0.146311] emc: device handler registered
> [    0.146319] alua: device handler registered
> [    0.146377] libphy: Fixed MDIO Bus: probed
> [    0.146476] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> [    0.146494] ehci-pci: EHCI PCI platform driver
> [    0.146512] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
> [    0.146524] ohci-pci: OHCI PCI platform driver
> [    0.146539] uhci_hcd: USB Universal Host Controller Interface driver
> [    0.146640] usbcore: registered new interface driver usbserial
> [    0.146654] usbcore: registered new interface driver usbserial_generic
> [    0.146667] usbserial: USB Serial support registered for generic
> [    0.146699] i8042: PNP: No PS/2 controller found. Probing ports directly.
> [    1.174281] i8042: No controller found
> [    1.174418] mousedev: PS/2 mouse device common for all mice
> [    1.234684] rtc_cmos rtc_cmos: rtc core: registered rtc_cmos as rtc0
> [    1.234765] rtc_cmos: probe of rtc_cmos failed with error -38
> [    1.234856] hidraw: raw HID events driver (C) Jiri Kosina
> [    1.234969] usbcore: registered new interface driver usbhid
> [    1.234976] usbhid: USB HID core driver
> [    1.235029] drop_monitor: Initializing network drop monitor service
> [    1.235122] TCP: cubic registered
> [    1.235131] Initializing XFRM netlink socket
> [    1.235234] NET: Registered protocol family 10
> [    1.235426] NET: Registered protocol family 17
> [    1.235441] mce: Unable to init device /dev/mcelog (rc: -5)
> [    1.235655] Loading compiled-in X.509 certificates
> [    1.235690] Loaded X.509 cert 'CentOS Linux kpatch signing key: 
> ea0413152cde1d98ebdca3fe6f0230904c9ef717'
> [    1.235710] Loaded X.509 cert 'CentOS Linux Driver update signing key: 
> 7f421ee0ab69461574bb358861dbe77762a4201b'
> [    1.236357] Loaded X.509 cert 'CentOS Linux kernel signing key: 
> 34b5bca2b706d82e72a5be3ee409bec7195ea508'
> [    1.236389] registered taskstats version 1
> [    1.236890] Key type trusted registered
> [    1.237338] Key type encrypted registered
> [    1.237725] IMA: No TPM chip found, activating TPM-bypass!
> [    1.237777] xenbus_probe_frontend: Device with no driver: device/vkbd/0
> [    1.237784] xenbus_probe_frontend: Device with no driver: device/vfb/0
> [    1.237789] xenbus_probe_frontend: Device with no driver: device/vbd/51713
> [    1.237793] xenbus_probe_frontend: Device with no driver: device/vbd/51714
> [    1.237798] xenbus_probe_frontend: Device with no driver: device/vif/0
> [    1.237802] xenbus_probe_frontend: Device with no driver: device/vif/1
> [    1.237877] drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
> [    1.237990] md: Waiting for all devices to be available before autodetect
> [    1.237996] md: If you don't use raid, use raid=noautodetect
> [    1.238220] md: Autodetecting RAID arrays.
> [    1.238228] md: Scanned 0 and added 0 devices.
> [    1.238231] md: autorun ...
> [    1.238235] md: ... autorun DONE.
> [    1.238262] List of all partitions:
> [    1.238267] No filesystem could mount root, tried: 
> [    1.238274] Kernel panic - not syncing: VFS: Unable to mount root fs on 
> unknown-block(0,0)
> [    1.238281] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 
> 3.10.0-229.1.2.el7.x86_64 #1
> [    1.238288]  ffffffff818141a8 00000000c96288b2 ffff8802d9c0fd60 
> ffffffff81604afa
> [    1.238296]  ffff8802d9c0fde0 ffffffff815fe36e ffffffff00000010 
> ffff8802d9c0fdf0
> [    1.238304]  ffff8802d9c0fd90 00000000c96288b2 00000000c96288b2 
> ffff8802d9c0fe00
> [    1.238312] Call Trace:
> [    1.238323]  [<ffffffff81604afa>] dump_stack+0x19/0x1b
> [    1.238329]  [<ffffffff815fe36e>] panic+0xd8/0x1e7
> [    1.238338]  [<ffffffff81a4560d>] mount_block_root+0x2a1/0x2b0
> [    1.238344]  [<ffffffff81a4566f>] mount_root+0x53/0x56
> [    1.238350]  [<ffffffff81a457ae>] prepare_namespace+0x13c/0x174
> [    1.238356]  [<ffffffff81a4527b>] kernel_init_freeable+0x203/0x22a
> [    1.238363]  [<ffffffff81a449db>] ? initcall_blacklist+0xb0/0xb0
> [    1.238370]  [<ffffffff815f2fb0>] ? rest_init+0x80/0x80
> [    1.238376]  [<ffffffff815f2fbe>] kernel_init+0xe/0x180
> [    1.238383]  [<ffffffff8161497c>] ret_from_fork+0x7c/0xb0
> [    1.238389]  [<ffffffff815f2fb0>] ? rest_init+0x80/0x80
> 
> 
> 
> 
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxx
> http://lists.xen.org/xen-users



_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxx
http://lists.xen.org/xen-users