configuration-qemu.toml.in

# Copyright (c) 2017-2019 Intel Corporation
# Copyright (c) 2021 Adobe Inc.
#
# SPDX-License-Identifier: Apache-2.0
#

# XXX: WARNING: this file is auto-generated.
# XXX:
# XXX: Source file: "@CONFIG_QEMU_IN@"
# XXX: Project:
# XXX:   Name: @PROJECT_NAME@
# XXX:   Type: @PROJECT_TYPE@

[hypervisor.qemu]
path = "@QEMUPATH@"
kernel = "@KERNELPATH@"
image = "@IMAGEPATH@"
# initrd = "@INITRDPATH@"
machine_type = "@MACHINETYPE@"

# rootfs filesystem type:
#   - ext4 (default)
#   - xfs
#   - erofs
rootfs_type=@DEFROOTFSTYPE@

# Enable confidential guest support.
# Toggling that setting may trigger different hardware features, ranging
# from memory encryption to both memory and CPU-state encryption and integrity.
# The Kata Containers runtime dynamically detects the available feature set and
# aims at enabling the largest possible one, returning an error if none is
# available, or none is supported by the hypervisor.
#
# Known limitations:
# * Does not work by design:
#   - CPU Hotplug 
#   - Memory Hotplug
#   - NVDIMM devices
#
# Default false
# confidential_guest = true

# Choose AMD SEV-SNP confidential guests
# In case of using confidential guests on AMD hardware that supports both SEV
# and SEV-SNP, the following enables SEV-SNP guests. SEV guests are default.
# Default false
# sev_snp_guest = true

# Enable running QEMU VMM as a non-root user.
# By default QEMU VMM run as root. When this is set to true, QEMU VMM process runs as
# a non-root random user. See documentation for the limitations of this mode.
# rootless = true

# List of valid annotation names for the hypervisor
# Each member of the list is a regular expression, which is the base name
# of the annotation, e.g. "path" for io.katacontainers.config.hypervisor.path"
enable_annotations = @DEFENABLEANNOTATIONS@

# List of valid annotations values for the hypervisor
# Each member of the list is a path pattern as described by glob(3).
# The default if not set is empty (all annotations rejected.)
# Your distribution recommends: @QEMUVALIDHYPERVISORPATHS@
valid_hypervisor_paths = @QEMUVALIDHYPERVISORPATHS@

# Optional space-separated list of options to pass to the guest kernel.
# For example, use `kernel_params = "vsyscall=emulate"` if you are having
# trouble running pre-2.15 glibc.
#
# WARNING: - any parameter specified here will take priority over the default
# parameter value of the same name used to start the virtual machine.
# Do not set values here unless you understand the impact of doing so as you
# may stop the virtual machine from booting.
# To see the list of default parameters, enable hypervisor debug, create a
# container and look for 'default-kernel-parameters' log entries.
kernel_params = "@KERNELPARAMS@"

# Path to the firmware.
# If you want that qemu uses the default firmware leave this option empty
firmware = "@FIRMWAREPATH@"

# Path to the firmware volume.
# firmware TDVF or OVMF can be split into FIRMWARE_VARS.fd (UEFI variables
# as configuration) and FIRMWARE_CODE.fd (UEFI program image). UEFI variables
# can be customized per each user while UEFI code is kept same.
firmware_volume = "@FIRMWAREVOLUMEPATH@"

# Machine accelerators
# comma-separated list of machine accelerators to pass to the hypervisor.
# For example, `machine_accelerators = "nosmm,nosmbus,nosata,nopit,static-prt,nofw"`
machine_accelerators="@MACHINEACCELERATORS@"

# Qemu seccomp sandbox feature
# comma-separated list of seccomp sandbox features to control the syscall access.
# For example, `seccompsandbox= "on,obsolete=deny,spawn=deny,resourcecontrol=deny"`
# Note: "elevateprivileges=deny" doesn't work with daemonize option, so it's removed from the seccomp sandbox
# Another note: enabling this feature may reduce performance, you may enable
# /proc/sys/net/core/bpf_jit_enable to reduce the impact. see https://man7.org/linux/man-pages/man8/bpfc.8.html
#seccompsandbox="@DEFSECCOMPSANDBOXPARAM@"

# CPU features
# comma-separated list of cpu features to pass to the cpu
# For example, `cpu_features = "pmu=off,vmx=off"
cpu_features="@CPUFEATURES@"

# Default number of vCPUs per SB/VM:
# unspecified or 0                --> will be set to @DEFVCPUS@
# < 0                             --> will be set to the actual number of physical cores
# > 0 <= number of physical cores --> will be set to the specified number
# > number of physical cores      --> will be set to the actual number of physical cores
default_vcpus = 1

# Default maximum number of vCPUs per SB/VM:
# unspecified or == 0             --> will be set to the actual number of physical cores or to the maximum number
#                                     of vCPUs supported by KVM if that number is exceeded
# > 0 <= number of physical cores --> will be set to the specified number
# > number of physical cores      --> will be set to the actual number of physical cores or to the maximum number
#                                     of vCPUs supported by KVM if that number is exceeded
# WARNING: Depending of the architecture, the maximum number of vCPUs supported by KVM is used when
# the actual number of physical cores is greater than it.
# WARNING: Be aware that this value impacts the virtual machine's memory footprint and CPU
# the hotplug functionality. For example, `default_maxvcpus = 240` specifies that until 240 vCPUs
# can be added to a SB/VM, but the memory footprint will be big. Another example, with
# `default_maxvcpus = 8` the memory footprint will be small, but 8 will be the maximum number of
# vCPUs supported by the SB/VM. In general, we recommend that you do not edit this variable,
# unless you know what are you doing.
# NOTICE: on arm platform with gicv2 interrupt controller, set it to 8.
default_maxvcpus = @DEFMAXVCPUS@

# Bridges can be used to hot plug devices.
# Limitations:
# * Currently only pci bridges are supported
# * Until 30 devices per bridge can be hot plugged.
# * Until 5 PCI bridges can be cold plugged per VM.
#   This limitation could be a bug in qemu or in the kernel
# Default number of bridges per SB/VM:
# unspecified or 0   --> will be set to @DEFBRIDGES@
# > 1 <= 5           --> will be set to the specified number
# > 5                --> will be set to 5
default_bridges = @DEFBRIDGES@

# Default memory size in MiB for SB/VM.
# If unspecified then it will be set @DEFMEMSZ@ MiB.
default_memory = @DEFMEMSZ@
#
# Default memory slots per SB/VM.
# If unspecified then it will be set @DEFMEMSLOTS@.
# This is will determine the times that memory will be hotadded to sandbox/VM.
#memory_slots = @DEFMEMSLOTS@

# Default maximum memory in MiB per SB / VM
# unspecified or == 0           --> will be set to the actual amount of physical RAM
# > 0 <= amount of physical RAM --> will be set to the specified number
# > amount of physical RAM      --> will be set to the actual amount of physical RAM
default_maxmemory = @DEFMAXMEMSZ@

# The size in MiB will be plused to max memory of hypervisor.
# It is the memory address space for the NVDIMM devie.
# If set block storage driver (block_device_driver) to "nvdimm",
# should set memory_offset to the size of block device.
# Default 0
#memory_offset = 0

# Specifies virtio-mem will be enabled or not.
# Please note that this option should be used with the command
# "echo 1 > /proc/sys/vm/overcommit_memory".
# Default false
#enable_virtio_mem = true

# Disable block device from being used for a container's rootfs.
# In case of a storage driver like devicemapper where a container's
# root file system is backed by a block device, the block device is passed
# directly to the hypervisor for performance reasons.
# This flag prevents the block device from being passed to the hypervisor,
# virtio-fs is used instead to pass the rootfs.
disable_block_device_use = @DEFDISABLEBLOCK@

# Shared file system type:
#   - virtio-fs (default)
#   - virtio-9p
#   - virtio-fs-nydus
#   - none
shared_fs = "@DEFSHAREDFS_QEMU_VIRTIOFS@"

# Path to vhost-user-fs daemon.
virtio_fs_daemon = "@DEFVIRTIOFSDAEMON@"

# List of valid annotations values for the virtiofs daemon
# The default if not set is empty (all annotations rejected.)
# Your distribution recommends: @DEFVALIDVIRTIOFSDAEMONPATHS@
valid_virtio_fs_daemon_paths = @DEFVALIDVIRTIOFSDAEMONPATHS@

# Default size of DAX cache in MiB
virtio_fs_cache_size = @DEFVIRTIOFSCACHESIZE@

# Default size of virtqueues
virtio_fs_queue_size = @DEFVIRTIOFSQUEUESIZE@

# Extra args for virtiofsd daemon
#
# Format example:
#   ["--arg1=xxx", "--arg2=yyy"]
# Examples:
#   Set virtiofsd log level to debug : ["--log-level=debug"]
#
# see `virtiofsd -h` for possible options.
virtio_fs_extra_args = @DEFVIRTIOFSEXTRAARGS@

# Cache mode:
#
#  - never
#    Metadata, data, and pathname lookup are not cached in guest. They are
#    always fetched from host and any changes are immediately pushed to host.
#
#  - auto
#    Metadata and pathname lookup cache expires after a configured amount of
#    time (default is 1 second). Data is cached while the file is open (close
#    to open consistency).
#
#  - always
#    Metadata, data, and pathname lookup are cached in guest and never expire.
virtio_fs_cache = "@DEFVIRTIOFSCACHE@"

# Block storage driver to be used for the hypervisor in case the container
# rootfs is backed by a block device. This is virtio-scsi, virtio-blk
# or nvdimm.
block_device_driver = "@DEFBLOCKSTORAGEDRIVER_QEMU@"

# aio is the I/O mechanism used by qemu
# Options:
#
#   - threads
#     Pthread based disk I/O.
#
#   - native
#     Native Linux I/O.
#
#   - io_uring
#     Linux io_uring API. This provides the fastest I/O operations on Linux, requires kernel>5.1 and
#     qemu >=5.0.
block_device_aio = "@DEFBLOCKDEVICEAIO_QEMU@"

# Specifies cache-related options will be set to block devices or not.
# Default false
#block_device_cache_set = true

# Specifies cache-related options for block devices.
# Denotes whether use of O_DIRECT (bypass the host page cache) is enabled.
# Default false
#block_device_cache_direct = true

# Specifies cache-related options for block devices.
# Denotes whether flush requests for the device are ignored.
# Default false
#block_device_cache_noflush = true

# Enable iothreads (data-plane) to be used. This causes IO to be
# handled in a separate IO thread. This is currently only implemented
# for SCSI.
#
enable_iothreads = @DEFENABLEIOTHREADS@

# Enable pre allocation of VM RAM, default false
# Enabling this will result in lower container density
# as all of the memory will be allocated and locked
# This is useful when you want to reserve all the memory
# upfront or in the cases where you want memory latencies
# to be very predictable
# Default false
#enable_mem_prealloc = true

# Enable huge pages for VM RAM, default false
# Enabling this will result in the VM memory
# being allocated using huge pages.
# This is useful when you want to use vhost-user network
# stacks within the container. This will automatically
# result in memory pre allocation
#enable_hugepages = true

# Enable vhost-user storage device, default false
# Enabling this will result in some Linux reserved block type
# major range 240-254 being chosen to represent vhost-user devices.
enable_vhost_user_store = @DEFENABLEVHOSTUSERSTORE@

# The base directory specifically used for vhost-user devices.
# Its sub-path "block" is used for block devices; "block/sockets" is
# where we expect vhost-user sockets to live; "block/devices" is where
# simulated block device nodes for vhost-user devices to live.
vhost_user_store_path = "@DEFVHOSTUSERSTOREPATH@"

# Enable vIOMMU, default false
# Enabling this will result in the VM having a vIOMMU device
# This will also add the following options to the kernel's
# command line: intel_iommu=on,iommu=pt
#enable_iommu = true

# Enable IOMMU_PLATFORM, default false
# Enabling this will result in the VM device having iommu_platform=on set
#enable_iommu_platform = true

# List of valid annotations values for the vhost user store path
# The default if not set is empty (all annotations rejected.)
# Your distribution recommends: @DEFVALIDVHOSTUSERSTOREPATHS@
valid_vhost_user_store_paths = @DEFVALIDVHOSTUSERSTOREPATHS@

# The timeout for reconnecting on non-server spdk sockets when the remote end goes away.
# qemu will delay this many seconds and then attempt to reconnect.
# Zero disables reconnecting, and the default is zero.
vhost_user_reconnect_timeout_sec = 0

# Enable file based guest memory support. The default is an empty string which
# will disable this feature. In the case of virtio-fs, this is enabled
# automatically and '/dev/shm' is used as the backing folder.
# This option will be ignored if VM templating is enabled.
#file_mem_backend = "@DEFFILEMEMBACKEND@"

# List of valid annotations values for the file_mem_backend annotation
# The default if not set is empty (all annotations rejected.)
# Your distribution recommends: @DEFVALIDFILEMEMBACKENDS@
valid_file_mem_backends = @DEFVALIDFILEMEMBACKENDS@

# -pflash can add image file to VM. The arguments of it should be in format
# of ["/path/to/flash0.img", "/path/to/flash1.img"]
pflashes = []

# This option changes the default hypervisor and kernel parameters
# to enable debug output where available.
#
# Default false
#enable_debug = true

# This option allows to add an extra HMP or QMP socket when `enable_debug = true`
#
# WARNING: Anyone with access to the extra socket can take full control of
# Qemu. This is for debugging purpose only and must *NEVER* be used in
# production.
#
# Valid values are :
# - "hmp"
# - "qmp"
# - "qmp-pretty" (same as "qmp" with pretty json formatting)
#
# If set to the empty string "", no extra monitor socket is added. This is
# the default.
#extra_monitor_socket = hmp

# Disable the customizations done in the runtime when it detects
# that it is running on top a VMM. This will result in the runtime
# behaving as it would when running on bare metal.
#
#disable_nesting_checks = true

# This is the msize used for 9p shares. It is the number of bytes
# used for 9p packet payload.
#msize_9p = @DEFMSIZE9P@

# If false and nvdimm is supported, use nvdimm device to plug guest image.
# Otherwise virtio-block device is used.
#
# nvdimm is not supported when `confidential_guest = true`.
#
# Default is false
#disable_image_nvdimm = true

# VFIO devices are hotplugged on a bridge by default.
# Enable hotplugging on root bus. This may be required for devices with
# a large PCI bar, as this is a current limitation with hotplugging on
# a bridge.
# Default false
#hotplug_vfio_on_root_bus = true

# Enable hot-plugging of VFIO devices to a bridge-port, 
# root-port or switch-port. 
# The default setting is  "no-port"
#hot_plug_vfio = "root-port" 

# In a confidential compute environment hot-plugging can compromise
# security. 
# Enable cold-plugging of VFIO devices to a bridge-port, 
# root-port or switch-port. 
# The default setting is  "no-port", which means disabled. 
#cold_plug_vfio = "root-port" 

# Before hot plugging a PCIe device, you need to add a pcie_root_port device.
# Use this parameter when using some large PCI bar devices, such as Nvidia GPU
# The value means the number of pcie_root_port
# This value is valid when hotplug_vfio_on_root_bus is true and machine_type is "q35"
# Default 0
#pcie_root_port = 2

# If vhost-net backend for virtio-net is not desired, set to true. Default is false, which trades off
# security (vhost-net runs ring0) for network I/O performance.
#disable_vhost_net = true

#
# Default entropy source.
# The path to a host source of entropy (including a real hardware RNG)
# /dev/urandom and /dev/random are two main options.
# Be aware that /dev/random is a blocking source of entropy.  If the host
# runs out of entropy, the VMs boot time will increase leading to get startup
# timeouts.
# The source of entropy /dev/urandom is non-blocking and provides a
# generally acceptable source of entropy. It should work well for pretty much
# all practical purposes.
#entropy_source= "@DEFENTROPYSOURCE@"

# List of valid annotations values for entropy_source
# The default if not set is empty (all annotations rejected.)
# Your distribution recommends: @DEFVALIDENTROPYSOURCES@
valid_entropy_sources = @DEFVALIDENTROPYSOURCES@

# Path to OCI hook binaries in the *guest rootfs*.
# This does not affect host-side hooks which must instead be added to
# the OCI spec passed to the runtime.
#
# You can create a rootfs with hooks by customizing the osbuilder scripts:
# https://github.com/kata-containers/kata-containers/tree/main/tools/osbuilder
#
# Hooks must be stored in a subdirectory of guest_hook_path according to their
# hook type, i.e. "guest_hook_path/{prestart,poststart,poststop}".
# The agent will scan these directories for executable files and add them, in
# lexicographical order, to the lifecycle of the guest container.
# Hooks are executed in the runtime namespace of the guest. See the official documentation:
# https://github.com/opencontainers/runtime-spec/blob/v1.0.1/config.md#posix-platform-hooks
# Warnings will be logged if any error is encountered while scanning for hooks,
# but it will not abort container execution.
#guest_hook_path = "/usr/share/oci/hooks"
#
# Use rx Rate Limiter to control network I/O inbound bandwidth(size in bits/sec for SB/VM).
# In Qemu, we use classful qdiscs HTB(Hierarchy Token Bucket) to discipline traffic.
# Default 0-sized value means unlimited rate.
#rx_rate_limiter_max_rate = 0
# Use tx Rate Limiter to control network I/O outbound bandwidth(size in bits/sec for SB/VM).
# In Qemu, we use classful qdiscs HTB(Hierarchy Token Bucket) and ifb(Intermediate Functional Block)
# to discipline traffic.
# Default 0-sized value means unlimited rate.
#tx_rate_limiter_max_rate = 0

# Set where to save the guest memory dump file.
# If set, when GUEST_PANICKED event occurred,
# guest memeory will be dumped to host filesystem under guest_memory_dump_path,
# This directory will be created automatically if it does not exist.
#
# The dumped file(also called vmcore) can be processed with crash or gdb.
#
# WARNING:
#   Dump guest’s memory can take very long depending on the amount of guest memory
#   and use much disk space.
#guest_memory_dump_path="/var/crash/kata"

# If enable paging.
# Basically, if you want to use "gdb" rather than "crash",
# or need the guest-virtual addresses in the ELF vmcore,
# then you should enable paging.
#
# See: https://www.qemu.org/docs/master/qemu-qmp-ref.html#Dump-guest-memory for details
#guest_memory_dump_paging=false

# Enable swap in the guest. Default false.
# When enable_guest_swap is enabled, insert a raw file to the guest as the swap device
# if the swappiness of a container (set by annotation "io.katacontainers.container.resource.swappiness")
# is bigger than 0.
# The size of the swap device should be
# swap_in_bytes (set by annotation "io.katacontainers.container.resource.swap_in_bytes") - memory_limit_in_bytes.
# If swap_in_bytes is not set, the size should be memory_limit_in_bytes.
# If swap_in_bytes and memory_limit_in_bytes is not set, the size should
# be default_memory.
#enable_guest_swap = true

# use legacy serial for guest console if available and implemented for architecture. Default false
#use_legacy_serial = true

# disable applying SELinux on the VMM process (default false)
disable_selinux=@DEFDISABLESELINUX@

# disable applying SELinux on the container process
# If set to false, the type `container_t` is applied to the container process by default.
# Note: To enable guest SELinux, the guest rootfs must be CentOS that is created and built
# with `SELINUX=yes`.
# (default: true)
disable_guest_selinux=@DEFDISABLEGUESTSELINUX@


[factory]
# VM templating support. Once enabled, new VMs are created from template
# using vm cloning. They will share the same initial kernel, initramfs and
# agent memory by mapping it readonly. It helps speeding up new container
# creation and saves a lot of memory if there are many kata containers running
# on the same host.
#
# When disabled, new VMs are created from scratch.
#
# Note: Requires "initrd=" to be set ("image=" is not supported).
#
# Default false
#enable_template = true

# Specifies the path of template.
#
# Default "/run/vc/vm/template"
#template_path = "/run/vc/vm/template"

# The number of caches of VMCache:
# unspecified or == 0   --> VMCache is disabled
# > 0                   --> will be set to the specified number
#
# VMCache is a function that creates VMs as caches before using it.
# It helps speed up new container creation.
# The function consists of a server and some clients communicating
# through Unix socket.  The protocol is gRPC in protocols/cache/cache.proto.
# The VMCache server will create some VMs and cache them by factory cache.
# It will convert the VM to gRPC format and transport it when gets
# requestion from clients.
# Factory grpccache is the VMCache client.  It will request gRPC format
# VM and convert it back to a VM.  If VMCache function is enabled,
# kata-runtime will request VM from factory grpccache when it creates
# a new sandbox.
#
# Default 0
#vm_cache_number = 0

# Specify the address of the Unix socket that is used by VMCache.
#
# Default /var/run/kata-containers/cache.sock
#vm_cache_endpoint = "/var/run/kata-containers/cache.sock"

[agent.@PROJECT_TYPE@]
# If enabled, make the agent display debug-level messages.
# (default: disabled)
#enable_debug = true

# Enable agent tracing.
#
# If enabled, the agent will generate OpenTelemetry trace spans.
#
# Notes:
#
# - If the runtime also has tracing enabled, the agent spans will be
#   associated with the appropriate runtime parent span.
# - If enabled, the runtime will wait for the container to shutdown,
#   increasing the container shutdown time slightly.
#
# (default: disabled)
#enable_tracing = true

# Comma separated list of kernel modules and their parameters.
# These modules will be loaded in the guest kernel using modprobe(8).
# The following example can be used to load two kernel modules with parameters
#  - kernel_modules=["e1000e InterruptThrottleRate=3000,3000,3000 EEE=1", "i915 enable_ppgtt=0"]
# The first word is considered as the module name and the rest as its parameters.
# Container will not be started when:
#  * A kernel module is specified and the modprobe command is not installed in the guest
#    or it fails loading the module.
#  * The module is not available in the guest or it doesn't met the guest kernel
#    requirements, like architecture and version.
#
kernel_modules=[]

# Enable debug console.

# If enabled, user can connect guest OS running inside hypervisor
# through "kata-runtime exec <sandbox-id>" command

#debug_console_enabled = true

# Agent connection dialing timeout value in seconds
# (default: 45)
dial_timeout = 45

[runtime]
# If enabled, the runtime will log additional debug messages to the
# system log
# (default: disabled)
#enable_debug = true
#
# Internetworking model
# Determines how the VM should be connected to the
# the container network interface
# Options:
#
#   - macvtap
#     Used when the Container network interface can be bridged using
#     macvtap.
#
#   - none
#     Used when customize network. Only creates a tap device. No veth pair.
#
#   - tcfilter
#     Uses tc filter rules to redirect traffic from the network interface
#     provided by plugin to a tap interface connected to the VM.
#
internetworking_model="@DEFNETWORKMODEL_QEMU@"

# disable guest seccomp
# Determines whether container seccomp profiles are passed to the virtual
# machine and applied by the kata agent. If set to true, seccomp is not applied
# within the guest
# (default: true)
disable_guest_seccomp=@DEFDISABLEGUESTSECCOMP@

# vCPUs pinning settings
# if enabled, each vCPU thread will be scheduled to a fixed CPU
# qualified condition: num(vCPU threads) == num(CPUs in sandbox's CPUSet)
# enable_vcpus_pinning = false

# Apply a custom SELinux security policy to the container process inside the VM.
# This is used when you want to apply a type other than the default `container_t`,
# so general users should not uncomment and apply it.
# (format: "user:role:type")
# Note: You cannot specify MCS policy with the label because the sensitivity levels and
# categories are determined automatically by high-level container runtimes such as containerd.
#guest_selinux_label="@DEFGUESTSELINUXLABEL@"

# If enabled, the runtime will create opentracing.io traces and spans.
# (See https://www.jaegertracing.io/docs/getting-started).
# (default: disabled)
#enable_tracing = true

# Set the full url to the Jaeger HTTP Thrift collector.
# The default if not set will be "http://localhost:14268/api/traces"
#jaeger_endpoint = ""

# Sets the username to be used if basic auth is required for Jaeger.
#jaeger_user = ""

# Sets the password to be used if basic auth is required for Jaeger.
#jaeger_password = ""

# If enabled, the runtime will not create a network namespace for shim and hypervisor processes.
# This option may have some potential impacts to your host. It should only be used when you know what you're doing.
# `disable_new_netns` conflicts with `internetworking_model=tcfilter` and `internetworking_model=macvtap`. It works only
# with `internetworking_model=none`. The tap device will be in the host network namespace and can connect to a bridge
# (like OVS) directly.
# (default: false)
#disable_new_netns = true

# if enabled, the runtime will add all the kata processes inside one dedicated cgroup.
# The container cgroups in the host are not created, just one single cgroup per sandbox.
# The runtime caller is free to restrict or collect cgroup stats of the overall Kata sandbox.
# The sandbox cgroup path is the parent cgroup of a container with the PodSandbox annotation.
# The sandbox cgroup is constrained if there is no container type annotation.
# See: https://pkg.go.dev/github.com/kata-containers/kata-containers/src/runtime/virtcontainers#ContainerType
sandbox_cgroup_only=@DEFSANDBOXCGROUPONLY@

# If enabled, the runtime will attempt to determine appropriate sandbox size (memory, CPU) before booting the virtual machine. In
# this case, the runtime will not dynamically update the amount of memory and CPU in the virtual machine. This is generally helpful
# when a hardware architecture or hypervisor solutions is utilized which does not support CPU and/or memory hotplug.
# Compatibility for determining appropriate sandbox (VM) size:
# - When running with pods, sandbox sizing information will only be available if using Kubernetes >= 1.23 and containerd >= 1.6. CRI-O
#   does not yet support sandbox sizing annotations.
# - When running single containers using a tool like ctr, container sizing information will be available.
static_sandbox_resource_mgmt=@DEFSTATICRESOURCEMGMT@

# If specified, sandbox_bind_mounts identifieds host paths to be mounted (ro) into the sandboxes shared path.
# This is only valid if filesystem sharing is utilized. The provided path(s) will be bindmounted into the shared fs directory.
# If defaults are utilized, these mounts should be available in the guest at `/run/kata-containers/shared/containers/sandbox-mounts`
# These will not be exposed to the container workloads, and are only provided for potential guest services.
sandbox_bind_mounts=@DEFBINDMOUNTS@

# VFIO Mode
# Determines how VFIO devices should be be presented to the container.
# Options:
#
#  - vfio
#    Matches behaviour of OCI runtimes (e.g. runc) as much as
#    possible.  VFIO devices will appear in the container as VFIO
#    character devices under /dev/vfio.  The exact names may differ
#    from the host (they need to match the VM's IOMMU group numbers
#    rather than the host's)
#
#  - guest-kernel
#    This is a Kata-specific behaviour that's useful in certain cases.
#    The VFIO device is managed by whatever driver in the VM kernel
#    claims it.  This means it will appear as one or more device nodes
#    or network interfaces depending on the nature of the device.
#    Using this mode requires specially built workloads that know how
#    to locate the relevant device interfaces within the VM.
#
vfio_mode="@DEFVFIOMODE@"

# If enabled, the runtime will not create Kubernetes emptyDir mounts on the guest filesystem. Instead, emptyDir mounts will
# be created on the host and shared via virtio-fs. This is potentially slower, but allows sharing of files from host to guest.
disable_guest_empty_dir=@DEFDISABLEGUESTEMPTYDIR@

# Enabled experimental feature list, format: ["a", "b"].
# Experimental features are features not stable enough for production,
# they may break compatibility, and are prepared for a big version bump.
# Supported experimental features:
# (default: [])
experimental=@DEFAULTEXPFEATURES@

# If enabled, user can run pprof tools with shim v2 process through kata-monitor.
# (default: false)
# enable_pprof = true

# Indicates the CreateContainer request timeout needed for the workload(s)
# It using guest_pull this includes the time to pull the image inside the guest
# Defaults to @DEFCREATECONTAINERTIMEOUT@ second(s)  
# Note: The effective timeout is determined by the lesser of two values: runtime-request-timeout from kubelet config 
# (https://kubernetes.io/docs/reference/command-line-tools-reference/kubelet/#:~:text=runtime%2Drequest%2Dtimeout) and create_container_timeout. 
# In essence, the timeout used for guest pull=runtime-request-timeout<create_container_timeout?runtime-request-timeout:create_container_timeout.
create_container_timeout = @DEFCREATECONTAINERTIMEOUT@