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kata_agent: use virtio-fs shared dir in CreateSandbox

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Use virtio-fs instead of virtio-9p when virtio-fs is enabled.

Fixes: #1542
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2018-07-06 10:44:23 +01:00
parent 9480978364
commit 82d1a9d6f4
1 changed files with 38 additions and 23 deletions
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61
virtcontainers/kata_agent.go
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@ -65,22 +65,25 @@ var (
mountGuest9pTag = "kataShared"
kataGuestSandboxDir = "/run/kata-containers/sandbox/"
type9pFs = "9p"
typeVirtioFS = "virtio_fs"
vsockSocketScheme = "vsock"
// port numbers below 1024 are called privileged ports. Only a process with
// CAP_NET_BIND_SERVICE capability may bind to these port numbers.
vSockPort = 1024
kata9pDevType = "9p"
kataMmioBlkDevType = "mmioblk"
kataBlkDevType = "blk"
kataSCSIDevType = "scsi"
kataNvdimmDevType = "nvdimm"
sharedDir9pOptions = []string{"trans=virtio,version=9p2000.L,cache=mmap", "nodev"}
shmDir = "shm"
kataEphemeralDevType = "ephemeral"
ephemeralPath = filepath.Join(kataGuestSandboxDir, kataEphemeralDevType)
grpcMaxDataSize = int64(1024 * 1024)
localDirOptions = []string{"mode=0777"}
maxHostnameLen = 64
vSockPort = 1024
kata9pDevType = "9p"
kataMmioBlkDevType = "mmioblk"
kataBlkDevType = "blk"
kataSCSIDevType = "scsi"
kataNvdimmDevType = "nvdimm"
kataVirtioFSDevType = "virtio-fs"
sharedDir9pOptions = []string{"trans=virtio,version=9p2000.L,cache=mmap", "nodev"}
sharedDirVirtioFSOptions = []string{"default_permissions,allow_other,rootmode=040000,user_id=0,group_id=0,dax,tag=" + mountGuest9pTag, "nodev"}
shmDir = "shm"
kataEphemeralDevType = "ephemeral"
ephemeralPath = filepath.Join(kataGuestSandboxDir, kataEphemeralDevType)
grpcMaxDataSize = int64(1024 * 1024)
localDirOptions = []string{"mode=0777"}
maxHostnameLen = 64
)
const (
@ -738,22 +741,34 @@ func (k *kataAgent) startSandbox(sandbox *Sandbox) error {
// append 9p shared volume to storages only if filesystem sharing is supported
if caps.IsFsSharingSupported() {
sharedDir9pOptions = append(sharedDir9pOptions, fmt.Sprintf("msize=%d", sandbox.config.HypervisorConfig.Msize9p))
// We mount the shared directory in a predefined location
// in the guest.
// This is where at least some of the host config files
// (resolv.conf, etc...) and potentially all container
// rootfs will reside.
sharedVolume := &grpc.Storage{
Driver: kata9pDevType,
Source: mountGuest9pTag,
MountPoint: kataGuestSharedDir,
Fstype: type9pFs,
Options: sharedDir9pOptions,
}
if sandbox.config.HypervisorConfig.SharedFS == config.VirtioFS {
sharedVolume := &grpc.Storage{
Driver: kataVirtioFSDevType,
Source: "none",
MountPoint: kataGuestSharedDir,
Fstype: typeVirtioFS,
Options: sharedDirVirtioFSOptions,
}
storages = append(storages, sharedVolume)
storages = append(storages, sharedVolume)
} else {
sharedDir9pOptions = append(sharedDir9pOptions, fmt.Sprintf("msize=%d", sandbox.config.HypervisorConfig.Msize9p))
sharedVolume := &grpc.Storage{
Driver: kata9pDevType,
Source: mountGuest9pTag,
MountPoint: kataGuestSharedDir,
Fstype: type9pFs,
Options: sharedDir9pOptions,
}
storages = append(storages, sharedVolume)
}
}
if sandbox.shmSize > 0 {