Error domain does not exist. xen

error domain does not exist. xen

You receive the following error: failed domain creation due to memory shortage, unable to balloon domain0. A domain can fail if there is not enough RAM. I return here to tell the solution. Simple reboot host resolve the problem. Xen recreates the scenario without errors. In my case, I had "qemu-dm" zombie. sprers.eu › showthread.

Error: Error domain does not exist. xen

OKI 410 ERROR 413
Error domain does not exist. xen
Setupdd.sys error 4
SACRED INSTALL ERROR INITIALIZING DIRECTX
uuid

Removes the vtpm device from the domain specified by domain-id. devid is the numeric device id given to the virtual Trusted Platform Module device. You will need to run xl vtpm-list to determine that number. Alternatively, the uuid of the vtpm can be used to select the virtual device to detach.

vtpm-listdomain-id

List virtual Trusted Platform Modules for a domain.

VDISPL DEVICES

vdispl-attachdomain-idvdispl-device

Creates a new vdispl device in the domain specified by domain-id. vdispl-device describes the device to attach, using the same format as the vdispl string in the domain config file. See sprers.eu(5) for more information.

NOTES

    As in vdispl-device string semicolon is used then put quotes or escaping when using from the shell.

    EXAMPLE

      xl vdispl-attach DomU connectors='idx;idx;idx'

      or

      xl vdispl-attach DomU connectors=idx\;idx\;idx

vdispl-detachdomain-iddev-id

Removes the vdispl device specified by dev-id from the domain specified by domain-id.

vdispl-listdomain-id

List virtual displays for a domain.

VSND DEVICES

vsnd-attachdomain-idvsnd-itemvsnd-item

Creates a new vsnd device in the domain specified by domain-id. vsnd-item's describe the vsnd device to attach, using the same format as the VSND_ITEM_SPEC string in the domain config file. See sprers.eu(5) for more information.

EXAMPLE

    xl vsnd-attach DomU 'CARD, short-name=Main, sample-formats=s16_le;s8;u32_be' 'PCM, name=Main' 'STREAM, id=0, type=p' 'STREAM, id=1, type=c, channels-max=2'

vsnd-detachdomain-iddev-id

Removes the vsnd device specified by dev-id from the domain specified by domain-id.

vsnd-listdomain-id

List vsnd devices for a domain.

KEYBOARD DEVICES

vkb-attachdomain-idvkb-device

Creates a new keyboard device in the domain specified by domain-id. vkb-device describes the device to attach, using the same format as the VKB_SPEC_STRING string in the domain config file. See sprers.eu(5) for more information.

vkb-detachdomain-iddevid

Removes the keyboard device from the domain specified by domain-id. devid is the virtual interface device number within the domain

vkb-listdomain-id

List virtual network interfaces for a domain.

pci-assignable-list [-n]

List all the BDF of assignable PCI devices. See xl-pci-configuration(5) for more information. If the -n option is specified then any name supplied when the device was made assignable will also be displayed.

These are devices in the system which are configured to be available for passthrough and are bound to a suitable PCI backend driver in domain 0 rather than a real driver.

pci-assignable-add [-n NAME] BDF

Make the device at BDF assignable to guests, error domain does not exist. xen. See xl-pci-configuration(5) for more information. If the -n option is supplied then the assignable device entry will the named with the given NAME.

This will bind the device to the pciback driver and assign it to the "quarantine domain". If it is already bound to a driver, it will first be unbound, and the original driver stored so that it can be re-bound to the same driver later if desired. If the device is already bound, it will assign it to the quarantine domain and return success.

CAUTION: This will make the device unusable by Domain 0 until it is returned with pci-assignable-remove. Care should therefore be taken not to do this on a device critical to domain 0's operation, such as storage controllers, error domain does not exist. xen, network interfaces, or GPUs that are currently being used.

pci-assignable-remove [-r] BDF domain-id

Gracefully shuts down a domain. This coordinates with the domain OS to perform graceful shutdown, so there is no guarantee that it will succeed, and may take a variable length of time depending on what services must be shut down in the domain.

For HVM domains this requires PV drivers to be installed in your guest OS. If PV drivers are not present but you have configured the guest OS to behave appropriately you may be able to use the -F option to trigger a power button press.

The command returns immediately after signaling the domain unless the -w flag is used.

The behavior of what happens to a domain when it reboots is set by the on_shutdown parameter of the domain configuration file when the domain was created.

OPTIONS

-a, error domain does not exist. xen, --all

Shutdown all guest domains. Often used when doing a complete shutdown of a Xen system.

-w, --wait

Wait for the domain to complete shutdown before returning. If given once, the wait is for domain shutdown or domain death. If given multiple times, the wait is for domain death only.

-F

If the guest does not support PV shutdown control then fallback to sending an ACPI power event (equivalent to the power option to trigger).

You should ensure that the guest is configured to behave as expected in response to this event.

sysrqdomain-idletter

Send a <Magic System Request> to the domain, each type of request is represented by a different letter. It can be used to send SysRq requests to Linux guests, see sprers.eu in your Linux Kernel sources for more information. It requires PV drivers to be installed in your guest OS.

triggerdomain-idnmi grep -i hvm" output for an Intel system where HVM is supported by the CPU:

(XEN) HVM: VMX enabled

Example "xl dmesg" output for an Intel system where HVM is supported by the CPU but it's disabled in the system BIOS:

(XEN) VMX disabled by Feature Control MSR.

Example "xl dmesg

Virtual Servers Do Not Boot after Being Started on Xen and Newer Versions

Issue


After upgrading compute resources to Xen >=some virtual servers keep crashing or a kernel panic occurs in a few minutes after they are started.

Environment


OnApp 6.x with computer resources based on Xen >= compute resources

Some of the affected distributions and their kernel versions:

  • Debian 8.x kernel version *
  • CentOS 7.x kernel kernel version *
  • Ubuntu x kernel version *
  • Ubuntu x kernel version *

Resolution


1. Edit a guest's GRUB configuration file adding the boot option to the kernel parameters.

   GRUB Legacy:

   Edit the bootloader config file and append this option to the kernel line:

          on Debian 
         • on CentOS 

    GRUB2:

           Edit and append this option between the quotes in
             the GRUB_CMDLINE_LINUX_DEFAULT line.
          • Regenerate the file with 
              OR
          • Edit  and append this option to the Linux line.

When the above is not possible to apply while the virtual server is running, boot it in recovery mode and perform these changes from there. Refer to the Recovery Console page.

If you want to have a VS's disk be mounted on computer resources, refer to the Mount Virtual Server's Disk to Compute Resource or Backup Server page.

If you want to run when the virtual server is in recovery mode, prepare the environment and  there. Refer to the Manually Reset Linux Root Password via Recovery page.

2. Make the changes at the compute resource level. These changes will be applied to all the Linux-based error domain does not exist. xen servers that start on this compute resource.
    Edit the error domain does not exist. xen script and add in the following line:

CODE

Additional Information


For more information about the issue, refer to:

--force
] domain-idvcpucpus hardcpus soft

Set hard and soft affinity for a vcpu of <domain-id>. Normally VCPUs can float between available CPUs whenever Xen deems a different run state is appropriate.

Hard affinity can be used to restrict this, by ensuring certain VCPUs can only run on certain physical CPUs. Soft affinity specifies a preferred set of CPUs. Soft affinity needs special support in the scheduler, error domain does not exist. xen, which is only provided in credit1.

The keyword all can be used to apply the hard and soft affinity masks to all the VCPUs in the domain. The symbol '-' can be used to leave either hard or soft affinity alone.

For example:

will set soft affinity for vCPU 3 of domain 0 to pCPUs 6,7,8 and 9, leaving its hard affinity untouched. On the other hand:

will set both hard and soft affinity, the former to pCPUs 3 and 4, error domain does not exist. xen, the latter to pCPUs 6,7,8, and 9.

Specifying -f or --force will remove a temporary pinning done by the operating system (normally this should be done by the operating system). In case a temporary pinning is active for a vcpu the affinity of this vcpu can't be changed without this option.

vm-list

Prints information about guests. This list excludes information about service or auxiliary domains such as dom0 and stubdoms.

EXAMPLE

An example format for the list is as follows:

vncviewer [OPTIONS] domain-id

Attach to the domain's VNC server, forking a vncviewer process.

OPTIONS

--autopass

Pass the VNC password to vncviewer via stdin.

debug-keyskeys

Send debug keys to Xen. It is the same as pressing the Xen "conswitch" (Ctrl-A by default) three times and then pressing "keys".

set-parametersparams

Set hypervisor parameters as specified in params. This allows for some boot parameters of the hypervisor to be modified in the running systems.

dmesg [OPTIONS]

Reads the Xen message buffer, similar to dmesg on a Linux system. The buffer contains informational, warning, and error messages created during Xen's boot process. If you are having problems with Xen, this is one of the first places to look as part of problem determination.

OPTIONS

-c, --clear

Clears Xen's message buffer.

info [OPTIONS]

Print information about the Xen host in name : value format. When reporting a Xen bug, please provide this information as part of the bug report. See sprers.eu on how to report Xen bugs.

Sample output looks as follows:

FIELDS

Not all fields will be explained here, but some of the less obvious ones deserve explanation:

hw_caps

A vector showing what hardware capabilities are supported by your processor. This is equivalent to, though more cryptic, the flags field in /proc/cpuinfo on a normal Linux machine: they both derive from the feature bits returned by the cpuid command on x86 platforms.

free_memory

Available memory (in MB) not allocated to Xen, or any other domains, or claimed for domains.

outstanding_claims

When a claim call is done (see sprers.eu(5)) a reservation for a specific amount of pages is set and also a global value is incremented. This global value (outstanding_claims) is then reduced as the domain's memory is populated and eventually reaches zero. Most of the time the value will be zero, but if you are launching multiple error domain does not exist. xen, and claim_mode is enabled, this value can increase/decrease. Note that the value also affects the free_memory - as it will reflect the free memory in the hypervisor minus the outstanding pages claimed for guests. See xl infoclaims parameter for detailed listing.

xen_caps

The Xen version and architecture, error domain does not exist. xen. Architecture values can be one of: x86_32, x86_32p (i.e. PAE enabled), x86_64, error domain does not exist. xen, ia

xen_changeset

The Xen mercurial changeset id. Very useful for determining exactly what version of code your Xen system was built from.

OPTIONS

-n, --numa

List host NUMA topology information

top

Executes the xentop(1) command, which provides real time monitoring of domains. Xentop has a curses interface, and is reasonably self explanatory.

uptime

Prints the current uptime of the domains running.

claims

Prints information about outstanding claims by the guests. This provides the outstanding claims and currently populated memory count for the guests. These values added up reflect the global outstanding claim value, which is provided via the info argument, outstanding_claims value. The Mem column has the cumulative value of outstanding claims and the total amount of memory that has been right now allocated to the guest.

EXAMPLE

An example format for the list is as follows:

In which it can be seen that the OL5 guest still has MB of claimed memory (out of the total MB where MB has been allocated to the guest).

Xen ships with a number of domain schedulers, which can be set at boot time with the sched= parameter on the Xen an error occurred while mounting /media/windows line. By default credit is used for scheduling.

sched-credit [OPTIONS]

Set or get credit (aka credit1) scheduler parameters. The credit scheduler is a proportional fair share CPU scheduler built from the ground up to be work conserving on SMP hosts.

Each domain (including Domain0) is assigned a weight and a cap.

OPTIONS

-d DOMAIN, --domain=DOMAIN

Specify domain for which scheduler parameters are to be modified or retrieved. Mandatory for modifying scheduler parameters.

-w WEIGHT, --weight=WEIGHT

A domain with a weight of will get twice as much CPU as a domain with a weight of on a contended host. Legal weights range from 1 to and the default is

-c CAP, --cap=CAP

The cap optionally fixes the maximum amount of CPU a domain will be able to consume, even if the host system has idle CPU cycles. The cap is expressed in percentage of one physical CPU: is 1 physical CPU, 50 is half a CPU, is 4 CPUs, etc. The default, 0, means there is no upper cap.

NB: Many systems have features that will scale down the computing power of a cpu that is not % utilized. This can be in the operating system, but can also sometimes be below the operating system in the BIOS. If you set a cap such that individual cores are running at less than %, this may have an impact on the performance of your workload over and above the impact of the cap. For example, if your processor runs at 2GHz, and you cap a vm at 50%, the power management system may also reduce the clock speed to 1GHz; the effect will be that your VM gets 25% of the available power (50% of 1GHz) rather than 50% (50% of 2GHz). If you are not getting the performance you expect, look at performance and cpufreq options in your operating system and your BIOS.

-p CPUPOOL, --cpupool=CPUPOOL

Restrict output to domains in the specified cpupool.

-s, --schedparam

Specify to list or set pool-wide scheduler parameters.

-t TSLICE, --tslice_ms=TSLICE

Timeslice tells the scheduler how long to allow VMs to run before pre-empting. The default is 30ms. Valid ranges are 1ms to ms. The length of the timeslice (in ms) must be higher than the length of the ratelimit (see below).

-r RLIMIT, --ratelimit_us=RLIMIT

Ratelimit attempts to limit the number of schedules per second. It sets fatal directx error code 2 minimum amount of time (in microseconds) a VM must run before we will allow a higher-priority VM to pre-empt it. The default value is microseconds (1ms). Valid range is to (ms). The ratelimit length must be lower than the timeslice length.

-m DELAY, --migration_delay_us=DELAY

Migration delay specifies for how long a vCPU, after it stopped running should be considered "cache-hot". Basically, if less than DELAY us passed since when the vCPU was executing on a CPU, it is likely that most of the vCPU's working set is still in the CPU's cache, and therefore the vCPU is not migrated.

Default is 0. Maximum is ms. This can be effective at preventing vCPUs to bounce among CPUs too quickly, but, at the same time, the scheduler stops being fully work-conserving.

COMBINATION

The following is the effect of combining the above options:

<nothing> : List all domain params and sched params from all pools
-d [domid] : List domain params for domain [domid]
-d [domid] [params] : Set domain params for domain [domid]
-p [pool] : list all domains and sched params for [pool]
-s : List sched params for poolid 0
-s [params] : Set sched params for poolid 0
-p [pool] -s : List sched params for [pool]
-p [pool] -s [params] : Set sched params for [pool]
-p [pool] -d : Illegal
sched-credit2 [OPTIONS]

Set or get credit2 scheduler parameters. The credit2 scheduler is a proportional fair share CPU scheduler built from the ground up to be work conserving on SMP hosts.

Each domain (including Domain0) is assigned a weight.

OPTIONS

-d DOMAIN, --domain=DOMAIN

Specify domain for which scheduler parameters are to be modified or retrieved. Mandatory for modifying scheduler parameters.

-w WEIGHT, --weight=WEIGHT

A domain with a weight of will get twice as much CPU as a domain with a weight of on a contended host. Legal weights range from 1 to and the default is

-p CPUPOOL, --cpupool=CPUPOOL

Restrict output to domains in the specified cpupool.

-s, --schedparam

Specify to list or set pool-wide scheduler parameters.

-r RLIMIT, --ratelimit_us=RLIMIT

Attempts to limit the rate of context switching. It is basically the same as --ratelimit_us in sched-credit

sched-rtds [OPTIONS]

Set or get rtds (Real Time Deferrable Server) scheduler parameters. This rt scheduler applies Preemptive Global Earliest Deadline First real-time scheduling algorithm to schedule VCPUs in the system. Each VCPU has a dedicated period, budget and extratime. While scheduled, a VCPU burns its budget. A VCPU has its budget replenished at the beginning of each period; Unused budget is discarded at the end of each period. A VCPU with extratime set gets extra time from the unreserved system resource.

OPTIONS

-d DOMAIN, --domain=DOMAIN

Specify domain for which scheduler parameters are to be modified or retrieved. Mandatory for modifying scheduler parameters.

-v VCPUID/all, --vcpuid=VCPUID/all

Specify vcpu for which scheduler parameters are to be modified or retrieved.

-p PERIOD, --period=PERIOD

Period of time, in microseconds, over which to replenish the budget.

-b BUDGET, --budget=BUDGET

Amount of time, in microseconds, that the VCPU will be allowed to run every period.

Binary flag to decide if the VCPU will be allowed to get extra time from the unreserved system resource.

-c CPUPOOL, --cpupool=CPUPOOL

Restrict output to domains in the specified cpupool.

EXAMPLE

    1) Use -v all to see the budget and period of all the VCPUs of all the domains:

    Without any arguments, it will output the default scheduling parameters for error domain does not exist. xen domain:

    2) Use, for instance, -d vm1, -v all to see the budget and period of all VCPUs of a specific domain (vm1):

    To see the parameters of a subset of the VCPUs of a domain, use:

    If no -v is specified, error domain does not exist. xen default scheduling parameters for the domain are shown:

    3) Users can set the budget and period of multiple VCPUs of a specific domain with only one command, e.g., "xl sched-rtds -d vm1 -v 0 -p -b 50 -e 1 -v 3 -p -b -e 0".

    To change the parameters of all the VCPUs of a domain, error domain does not exist. xen, use -v all, e.g., "xl sched-rtds -d vm1 -v all -p -b -e 1".

Xen can group the physical cpus of a server in cpu-pools. Each physical CPU is assigned at most to one cpu-pool. Domains are each restricted to a single cpu-pool. Scheduling does not cross cpu-pool boundaries, so each cpu-pool has its own scheduler. Physical cpus and domains can be moved from one cpu-pool to another only by an explicit command. Cpu-pools can be specified either by name or by id.

cpupool-create [OPTIONS] [configfile] [variable=value ]

Create a cpu pool based an config from a configfile or command-line parameters. Variable settings from the configfile may be altered by specifying new or additional assignments on the command line.

See the sprers.eu(5) manpage for more information.

OPTIONS

-f=FILE, --defconfig=FILE

Use the given configuration file.

cpupool-list [OPTIONS] [cpu-pool]

List CPU pools on the host.

OPTIONS

-c, --cpus

If this option is specified, xl prints a list of CPUs used by cpu-pool.

cpupool-destroycpu-pool

Deactivates a cpu pool. This is possible only if no domain is active in the cpu-pool.

cpupool-renamecpu-pool <newname>

Renames a cpu-pool to newname.

cpupool-cpu-addcpu-poolcpus error domain does not exist. xen

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