Make: Add ACRN hypervisor and generate configuration file

This patch covers the following aspects,
1. Add ACRN as a supported hypervisor for amd64 architecture.
2. Build and install configuration file for ACRN hypervisor.

v1->v2:
1. Deleted autogenerated configuration-acrn.toml.
2. Trimmed configuration options not used by ACRN.

Fixes: #1778

Signed-off-by: Vijay Dhanraj <vijay.dhanraj@intel.com>
This commit is contained in:
Vijay Dhanraj 2019-06-08 11:49:54 -07:00
parent a4e6af0316
commit 4d26ceee79
3 changed files with 288 additions and 2 deletions

View File

@ -81,6 +81,7 @@ BINDIR := $(EXEC_PREFIX)/bin
NEMUBINDIR := $(PREFIXDEPS)/bin NEMUBINDIR := $(PREFIXDEPS)/bin
QEMUBINDIR := $(PREFIXDEPS)/bin QEMUBINDIR := $(PREFIXDEPS)/bin
FCBINDIR := $(PREFIXDEPS)/bin FCBINDIR := $(PREFIXDEPS)/bin
ACRNBINDIR := $(PREFIXDEPS)/bin
VIRTIOFSDBINDIR := $(PREFIXDEPS)/bin VIRTIOFSDBINDIR := $(PREFIXDEPS)/bin
SYSCONFDIR := /etc SYSCONFDIR := /etc
LOCALSTATEDIR := /var LOCALSTATEDIR := /var
@ -113,6 +114,7 @@ FIRMWAREPATH :=
# Name of default configuration file the runtime will use. # Name of default configuration file the runtime will use.
CONFIG_FILE = configuration.toml CONFIG_FILE = configuration.toml
HYPERVISOR_ACRN = acrn
HYPERVISOR_FC = firecracker HYPERVISOR_FC = firecracker
HYPERVISOR_NEMU = nemu HYPERVISOR_NEMU = nemu
HYPERVISOR_QEMU = qemu HYPERVISOR_QEMU = qemu
@ -121,7 +123,7 @@ HYPERVISOR_QEMU = qemu
DEFAULT_HYPERVISOR = $(HYPERVISOR_QEMU) DEFAULT_HYPERVISOR = $(HYPERVISOR_QEMU)
# List of hypervisors this build system can generate configuration for. # List of hypervisors this build system can generate configuration for.
HYPERVISORS := $(HYPERVISOR_FC) $(HYPERVISOR_QEMU) $(HYPERVISOR_NEMU) HYPERVISORS := $(HYPERVISOR_ACRN) $(HYPERVISOR_FC) $(HYPERVISOR_QEMU) $(HYPERVISOR_NEMU)
QEMUPATH := $(QEMUBINDIR)/$(QEMUCMD) QEMUPATH := $(QEMUBINDIR)/$(QEMUCMD)
@ -129,6 +131,9 @@ NEMUPATH := $(NEMUBINDIR)/$(NEMUCMD)
FCPATH = $(FCBINDIR)/$(FCCMD) FCPATH = $(FCBINDIR)/$(FCCMD)
ACRNPATH := $(ACRNBINDIR)/$(ACRNCMD)
ACRNCTLPATH := $(ACRNBINDIR)/$(ACRNCTLCMD)
SHIMCMD := $(BIN_PREFIX)-shim SHIMCMD := $(BIN_PREFIX)-shim
SHIMPATH := $(PKGLIBEXECDIR)/$(SHIMCMD) SHIMPATH := $(PKGLIBEXECDIR)/$(SHIMCMD)
@ -276,6 +281,28 @@ ifneq (,$(FCCMD))
KERNELPATH_FC = $(KERNELDIR)/$(KERNEL_NAME_FC) KERNELPATH_FC = $(KERNELDIR)/$(KERNEL_NAME_FC)
endif endif
ifneq (,$(ACRNCMD))
KNOWN_HYPERVISORS += $(HYPERVISOR_ACRN)
CONFIG_FILE_ACRN = configuration-acrn.toml
CONFIG_ACRN = $(CLI_DIR)/config/$(CONFIG_FILE_ACRN)
CONFIG_ACRN_IN = $(CONFIG_ACRN).in
CONFIG_PATH_ACRN = $(abspath $(CONFDIR)/$(CONFIG_FILE_ACRN))
CONFIG_PATHS += $(CONFIG_PATH_ACRN)
SYSCONFIG_ACRN = $(abspath $(SYSCONFDIR)/$(CONFIG_FILE_ACRN))
SYSCONFIG_PATHS += $(SYSCONFIG_ACRN)
CONFIGS += $(CONFIG_ACRN)
# acrn-specific options (all should be suffixed by "_ACRN")
DEFBLOCKSTORAGEDRIVER_ACRN := virtio-blk
DEFNETWORKMODEL_ACRN := bridged
KERNEL_NAME_ACRN = $(call MAKE_KERNEL_NAME,$(KERNELTYPE))
KERNELPATH_ACRN = $(KERNELDIR)/$(KERNEL_NAME_ACRN)
endif
ifeq (,$(KNOWN_HYPERVISORS)) ifeq (,$(KNOWN_HYPERVISORS))
$(error "ERROR: No hypervisors known for architecture $(ARCH) (looked for: $(HYPERVISORS))") $(error "ERROR: No hypervisors known for architecture $(ARCH) (looked for: $(HYPERVISORS))")
endif endif
@ -300,6 +327,10 @@ ifeq ($(DEFAULT_HYPERVISOR),$(HYPERVISOR_NEMU))
DEFAULT_HYPERVISOR_CONFIG = $(CONFIG_FILE_NEMU) DEFAULT_HYPERVISOR_CONFIG = $(CONFIG_FILE_NEMU)
endif endif
ifeq ($(DEFAULT_HYPERVISOR),$(HYPERVISOR_ACRN))
DEFAULT_HYPERVISOR_CONFIG = $(CONFIG_FILE_ACRN)
endif
CONFDIR := $(DEFAULTSDIR)/$(PROJECT_DIR) CONFDIR := $(DEFAULTSDIR)/$(PROJECT_DIR)
SYSCONFDIR := $(SYSCONFDIR)/$(PROJECT_DIR) SYSCONFDIR := $(SYSCONFDIR)/$(PROJECT_DIR)
@ -318,6 +349,10 @@ USER_VARS += BINDIR
USER_VARS += CONFIG_PATH USER_VARS += CONFIG_PATH
USER_VARS += DESTDIR USER_VARS += DESTDIR
USER_VARS += DEFAULT_HYPERVISOR USER_VARS += DEFAULT_HYPERVISOR
USER_VARS += ACRNCMD
USER_VARS += ACRNCTLCMD
USER_VARS += ACRNPATH
USER_VARS += ACRNCTLPATH
USER_VARS += FCCMD USER_VARS += FCCMD
USER_VARS += FCPATH USER_VARS += FCPATH
USER_VARS += NEMUCMD USER_VARS += NEMUCMD
@ -331,6 +366,7 @@ USER_VARS += MACHINETYPE
USER_VARS += KERNELDIR USER_VARS += KERNELDIR
USER_VARS += KERNELTYPE USER_VARS += KERNELTYPE
USER_VARS += KERNELTYPE_FC USER_VARS += KERNELTYPE_FC
USER_VARS += KERNELTYPE_ACRN
USER_VARS += FIRMWAREPATH USER_VARS += FIRMWAREPATH
USER_VARS += FIRMWAREPATH_NEMU USER_VARS += FIRMWAREPATH_NEMU
USER_VARS += MACHINEACCELERATORS USER_VARS += MACHINEACCELERATORS
@ -359,12 +395,14 @@ USER_VARS += DEFMAXVCPUS
USER_VARS += DEFMEMSZ USER_VARS += DEFMEMSZ
USER_VARS += DEFMEMSLOTS USER_VARS += DEFMEMSLOTS
USER_VARS += DEFBRIDGES USER_VARS += DEFBRIDGES
USER_VARS += DEFNETWORKMODEL_ACRN
USER_VARS += DEFNETWORKMODEL_FC USER_VARS += DEFNETWORKMODEL_FC
USER_VARS += DEFNETWORKMODEL_QEMU USER_VARS += DEFNETWORKMODEL_QEMU
USER_VARS += DEFNETWORKMODEL_NEMU USER_VARS += DEFNETWORKMODEL_NEMU
USER_VARS += DEFDISABLEGUESTSECCOMP USER_VARS += DEFDISABLEGUESTSECCOMP
USER_VARS += DEFAULTEXPFEATURES USER_VARS += DEFAULTEXPFEATURES
USER_VARS += DEFDISABLEBLOCK USER_VARS += DEFDISABLEBLOCK
USER_VARS += DEFBLOCKSTORAGEDRIVER_ACRN
USER_VARS += DEFBLOCKSTORAGEDRIVER_FC USER_VARS += DEFBLOCKSTORAGEDRIVER_FC
USER_VARS += DEFBLOCKSTORAGEDRIVER_QEMU USER_VARS += DEFBLOCKSTORAGEDRIVER_QEMU
USER_VARS += DEFBLOCKSTORAGEDRIVER_NEMU USER_VARS += DEFBLOCKSTORAGEDRIVER_NEMU
@ -472,14 +510,18 @@ $(GENERATED_FILES): %: %.in $(MAKEFILE_LIST) VERSION .git-commit
$(QUIET_GENERATE)$(SED) \ $(QUIET_GENERATE)$(SED) \
-e "s|@COMMIT@|$(shell cat .git-commit)|g" \ -e "s|@COMMIT@|$(shell cat .git-commit)|g" \
-e "s|@VERSION@|$(VERSION)|g" \ -e "s|@VERSION@|$(VERSION)|g" \
-e "s|@CONFIG_ACRN_IN@|$(CONFIG_ACRN_IN)|g" \
-e "s|@CONFIG_QEMU_IN@|$(CONFIG_QEMU_IN)|g" \ -e "s|@CONFIG_QEMU_IN@|$(CONFIG_QEMU_IN)|g" \
-e "s|@CONFIG_NEMU_IN@|$(CONFIG_NEMU_IN)|g" \ -e "s|@CONFIG_NEMU_IN@|$(CONFIG_NEMU_IN)|g" \
-e "s|@CONFIG_FC_IN@|$(CONFIG_FC_IN)|g" \ -e "s|@CONFIG_FC_IN@|$(CONFIG_FC_IN)|g" \
-e "s|@CONFIG_PATH@|$(CONFIG_PATH)|g" \ -e "s|@CONFIG_PATH@|$(CONFIG_PATH)|g" \
-e "s|@FCPATH@|$(FCPATH)|g" \ -e "s|@FCPATH@|$(FCPATH)|g" \
-e "s|@NEMUPATH@|$(NEMUPATH)|g" \ -e "s|@NEMUPATH@|$(NEMUPATH)|g" \
-e "s|@ACRNPATH@|$(ACRNPATH)|g" \
-e "s|@ACRNCTLPATH@|$(ACRNCTLPATH)|g" \
-e "s|@SYSCONFIG@|$(SYSCONFIG)|g" \ -e "s|@SYSCONFIG@|$(SYSCONFIG)|g" \
-e "s|@IMAGEPATH@|$(IMAGEPATH)|g" \ -e "s|@IMAGEPATH@|$(IMAGEPATH)|g" \
-e "s|@KERNELPATH_ACRN@|$(KERNELPATH_ACRN)|g" \
-e "s|@KERNELPATH_FC@|$(KERNELPATH_FC)|g" \ -e "s|@KERNELPATH_FC@|$(KERNELPATH_FC)|g" \
-e "s|@KERNELPATH@|$(KERNELPATH)|g" \ -e "s|@KERNELPATH@|$(KERNELPATH)|g" \
-e "s|@INITRDPATH@|$(INITRDPATH)|g" \ -e "s|@INITRDPATH@|$(INITRDPATH)|g" \
@ -507,12 +549,14 @@ $(GENERATED_FILES): %: %.in $(MAKEFILE_LIST) VERSION .git-commit
-e "s|@DEFMEMSZ@|$(DEFMEMSZ)|g" \ -e "s|@DEFMEMSZ@|$(DEFMEMSZ)|g" \
-e "s|@DEFMEMSLOTS@|$(DEFMEMSLOTS)|g" \ -e "s|@DEFMEMSLOTS@|$(DEFMEMSLOTS)|g" \
-e "s|@DEFBRIDGES@|$(DEFBRIDGES)|g" \ -e "s|@DEFBRIDGES@|$(DEFBRIDGES)|g" \
-e "s|@DEFNETWORKMODEL_ACRN@|$(DEFNETWORKMODEL_ACRN)|g" \
-e "s|@DEFNETWORKMODEL_FC@|$(DEFNETWORKMODEL_FC)|g" \ -e "s|@DEFNETWORKMODEL_FC@|$(DEFNETWORKMODEL_FC)|g" \
-e "s|@DEFNETWORKMODEL_QEMU@|$(DEFNETWORKMODEL_QEMU)|g" \ -e "s|@DEFNETWORKMODEL_QEMU@|$(DEFNETWORKMODEL_QEMU)|g" \
-e "s|@DEFNETWORKMODEL_NEMU@|$(DEFNETWORKMODEL_NEMU)|g" \ -e "s|@DEFNETWORKMODEL_NEMU@|$(DEFNETWORKMODEL_NEMU)|g" \
-e "s|@DEFDISABLEGUESTSECCOMP@|$(DEFDISABLEGUESTSECCOMP)|g" \ -e "s|@DEFDISABLEGUESTSECCOMP@|$(DEFDISABLEGUESTSECCOMP)|g" \
-e "s|@DEFAULTEXPFEATURES@|$(DEFAULTEXPFEATURES)|g" \ -e "s|@DEFAULTEXPFEATURES@|$(DEFAULTEXPFEATURES)|g" \
-e "s|@DEFDISABLEBLOCK@|$(DEFDISABLEBLOCK)|g" \ -e "s|@DEFDISABLEBLOCK@|$(DEFDISABLEBLOCK)|g" \
-e "s|@DEFBLOCKSTORAGEDRIVER_ACRN@|$(DEFBLOCKSTORAGEDRIVER_ACRN)|g" \
-e "s|@DEFBLOCKSTORAGEDRIVER_FC@|$(DEFBLOCKSTORAGEDRIVER_FC)|g" \ -e "s|@DEFBLOCKSTORAGEDRIVER_FC@|$(DEFBLOCKSTORAGEDRIVER_FC)|g" \
-e "s|@DEFBLOCKSTORAGEDRIVER_QEMU@|$(DEFBLOCKSTORAGEDRIVER_QEMU)|g" \ -e "s|@DEFBLOCKSTORAGEDRIVER_QEMU@|$(DEFBLOCKSTORAGEDRIVER_QEMU)|g" \
-e "s|@DEFBLOCKSTORAGEDRIVER_NEMU@|$(DEFBLOCKSTORAGEDRIVER_NEMU)|g" \ -e "s|@DEFBLOCKSTORAGEDRIVER_NEMU@|$(DEFBLOCKSTORAGEDRIVER_NEMU)|g" \
@ -680,6 +724,9 @@ ifneq (,$(findstring $(HYPERVISOR_NEMU),$(KNOWN_HYPERVISORS)))
endif endif
ifneq (,$(findstring $(HYPERVISOR_FC),$(KNOWN_HYPERVISORS))) ifneq (,$(findstring $(HYPERVISOR_FC),$(KNOWN_HYPERVISORS)))
@printf "\t$(HYPERVISOR_FC) hypervisor path (FCPATH) : %s\n" $(abspath $(FCPATH)) @printf "\t$(HYPERVISOR_FC) hypervisor path (FCPATH) : %s\n" $(abspath $(FCPATH))
endif
ifneq (,$(findstring $(HYPERVISOR_ACRN),$(KNOWN_HYPERVISORS)))
@printf "\t$(HYPERVISOR_ACRN) hypervisor path (ACRNPATH) : %s\n" $(abspath $(ACRNPATH))
endif endif
@printf "\tassets path (PKGDATADIR) : %s\n" $(abspath $(PKGDATADIR)) @printf "\tassets path (PKGDATADIR) : %s\n" $(abspath $(PKGDATADIR))
@printf "\tproxy+shim path (PKGLIBEXECDIR) : %s\n" $(abspath $(PKGLIBEXECDIR)) @printf "\tproxy+shim path (PKGLIBEXECDIR) : %s\n" $(abspath $(PKGLIBEXECDIR))

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@ -16,3 +16,7 @@ FCCMD := firecracker
# NEMU binary name # NEMU binary name
NEMUCMD := nemu-system-x86_64 NEMUCMD := nemu-system-x86_64
#ACRN binary name
ACRNCMD := acrn-dm
ACRNCTLCMD := acrnctl

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@ -0,0 +1,235 @@
# Copyright (c) 2017-2019 Intel Corporation
#
# SPDX-License-Identifier: Apache-2.0
#
# XXX: WARNING: this file is auto-generated.
# XXX:
# XXX: Source file: "@CONFIG_ACRN_IN@"
# XXX: Project:
# XXX: Name: @PROJECT_NAME@
# XXX: Type: @PROJECT_TYPE@
[hypervisor.acrn]
path = "@ACRNPATH@"
ctlpath = "@ACRNCTLPATH@"
kernel = "@KERNELPATH_ACRN@"
image = "@IMAGEPATH@"
# 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 acrn uses the default firmware leave this option empty
firmware = "@FIRMWAREPATH@"
# 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.
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 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@
# Block storage driver to be used for the hypervisor in case the container
# rootfs is backed by a block device. ACRN only supports virtio-blk.
block_device_driver = "@DEFBLOCKSTORAGEDRIVER_ACRN@"
# This option changes the default hypervisor and kernel parameters
# to enable debug output where available. This extra output is added
# to the proxy logs, but only when proxy debug is also enabled.
#
# Default false
#enable_debug = true
# 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
# If host doesn't support vhost_net, set to true. Thus we won't create vhost fds for nics.
# Default false
#disable_vhost_net = true
# 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/osbuilder
#
# Hooks must be stored in a subdirectory of guest_hook_path according to their
# hook type, i.e. "guest_hook_path/{prestart,postart,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 will scanning for hooks,
# but it will not abort container execution.
#guest_hook_path = "/usr/share/oci/hooks"
[proxy.@PROJECT_TYPE@]
path = "@PROXYPATH@"
# If enabled, proxy messages will be sent to the system log
# (default: disabled)
#enable_debug = true
[shim.@PROJECT_TYPE@]
path = "@SHIMPATH@"
# If enabled, shim messages will be sent to the system log
# (default: disabled)
#enable_debug = true
# If enabled, the shim will create opentracing.io traces and spans.
# (See https://www.jaegertracing.io/docs/getting-started).
#
# Note: By default, the shim runs in a separate network namespace. Therefore,
# to allow it to send trace details to the Jaeger agent running on the host,
# it is necessary to set 'disable_new_netns=true' so that it runs in the host
# network namespace.
#
# (default: disabled)
#enable_tracing = true
[agent.@PROJECT_TYPE@]
# If enabled, make the agent display debug-level messages.
# (default: disabled)
#enable_debug = true
# Enable agent tracing.
#
# If enabled, the default trace mode is "dynamic" and the
# default trace type is "isolated". The trace mode and type are set
# explicity with the `trace_type=` and `trace_mode=` options.
#
# Notes:
#
# - Tracing is ONLY enabled when `enable_tracing` is set: explicitly
# setting `trace_mode=` and/or `trace_type=` without setting `enable_tracing`
# will NOT activate agent tracing.
#
# - See https://github.com/kata-containers/agent/blob/master/TRACING.md for
# full details.
#
# (default: disabled)
#enable_tracing = true
#
#trace_mode = "dynamic"
#trace_type = "isolated"
[netmon]
# If enabled, the network monitoring process gets started when the
# sandbox is created. This allows for the detection of some additional
# network being added to the existing network namespace, after the
# sandbox has been created.
# (default: disabled)
#enable_netmon = true
# Specify the path to the netmon binary.
path = "@NETMONPATH@"
# If enabled, netmon messages will be sent to the system log
# (default: disabled)
#enable_debug = true
[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:
#
# - bridged
# Uses a linux bridge to interconnect the container interface to
# the VM. Works for most cases except macvlan and ipvlan.
#
# - 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_ACRN@"
# 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@
# If enabled, the runtime will create opentracing.io traces and spans.
# (See https://www.jaegertracing.io/docs/getting-started).
# (default: disabled)
#enable_tracing = true
# 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 `enable_netmon`
# `disable_new_netns` conflicts with `internetworking_model=bridged` 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.
# If you are using docker, `disable_new_netns` only works with `docker run --net=none`
# (default: false)
#disable_new_netns = true
# 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:
# 1. "newstore": new persist storage driver which breaks backward compatibility,
# expected to move out of experimental in 2.0.0.
# (default: [])
experimental=@DEFAULTEXPFEATURES@