VMCache is a new 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.
VMCache has two options.
vm_cache_number specifies the number of caches of VMCache:
unspecified or == 0 --> VMCache is disabled
> 0 --> will be set to the specified number
vm_cache_endpoint specifies the address of the Unix socket.
This commit just includes the core and the client of VMCache.
Currently, VM cache still cannot work with VM templating and vsock.
And just support qemu.
Fixes: #52
Signed-off-by: Hui Zhu <teawater@hyper.sh>
This value 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.
Signed-off-by: Hui Zhu <teawater@hyper.sh>
Add block_device_cache_set, block_device_cache_direct and
block_device_cache_noflush.
They are cache-related options for block devices that are described in
https://github.com/qemu/qemu/blob/master/qapi/block-core.json.
block_device_cache_direct denotes whether use of O_DIRECT (bypass the host
page cache) is enabled. block_device_cache_noflush denotes whether flush
requests for the device are ignored.
The json said they are supported since 2.9.
So add block_device_cache_set to control the cache options set to block
devices or not. It will help to support the old version qemu.
Fixes: #956
Signed-off-by: Hui Zhu <teawater@hyper.sh>
Refactor the config related codes into a separated
package which can be shared with other cli programs
such as kata's shimv2.
Fixes: #787Fixes: #714
Signed-off-by: fupan <lifupan@gmail.com>
