This introduces a new storage type: local. Local storage type will
tell the kata-agent to create an empty directory in the sandbox
directory within the VM.
K8s host emptyDirs will then use the local storage type and mount it
inside each container. By doing this, we utilise the storage medium
that the sandbox uses. In most cases this will be 9p.
If the VM is using device mapper for container storage, the containers
will benefit from the better performance of device mapper for
host emptyDir.
Fixes#1472
Signed-off-by: Alex Price <aprice@atlassian.com>
k8s host empty-dir is equivalent to docker volumes.
For this case, we should just use the host directory even
for system directories.
Move the isEphemeral function to virtcontainers to not
introduce cyclic dependency.
Fixes#1417
Signed-off-by: Archana Shinde <archana.m.shinde@intel.com>
systemd-random-seed service fails if the rootfs is a read-only fs.
systemd-random-seed restores the random seed of the system at early
boot and saves it at shutdown, since kata containers are one boot machines
this service is not needed.
Signed-off-by: Julio Montes <julio.montes@intel.com>
Reduce memory footprint ~7% by disabling some systemd services like
systemd-journald and systemd-udevd, those services are just consuming memory
and are not needed. For example kata-agent logs the errors through the proxy.
fixes#1339
Signed-off-by: Julio Montes <julio.montes@intel.com>
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>
Function SetKernelParams is just to update the runtimeConfig according to itself.
It just around the configuration.
So this patch moves it to updateRuntimeConfig.
Fixes: #1106
Signed-off-by: Hui Zhu <teawater@hyper.sh>
