/
load.go
217 lines (174 loc) · 6.76 KB
/
load.go
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package drivers
import (
"errors"
"fmt"
"slices"
"sync"
internalInstance "github.com/lxc/incus/v6/internal/instance"
"github.com/lxc/incus/v6/internal/revert"
"github.com/lxc/incus/v6/internal/server/db"
"github.com/lxc/incus/v6/internal/server/db/cluster"
"github.com/lxc/incus/v6/internal/server/db/warningtype"
"github.com/lxc/incus/v6/internal/server/device"
deviceConfig "github.com/lxc/incus/v6/internal/server/device/config"
"github.com/lxc/incus/v6/internal/server/instance"
"github.com/lxc/incus/v6/internal/server/instance/instancetype"
"github.com/lxc/incus/v6/internal/server/project"
"github.com/lxc/incus/v6/internal/server/state"
"github.com/lxc/incus/v6/shared/api"
"github.com/lxc/incus/v6/shared/logger"
)
// Instance driver definitions.
var instanceDrivers = map[string]func() instance.Instance{
"lxc": func() instance.Instance { return &lxc{} },
"qemu": func() instance.Instance { return &qemu{} },
}
// DriverStatus definition.
type DriverStatus struct {
Info instance.Info
Warning *cluster.Warning
Supported bool
}
// Supported instance drivers cache variables.
var driverStatusesMu sync.Mutex
var driverStatuses map[instancetype.Type]*DriverStatus
// Temporary instance reference storage (for hooks).
var instanceRefsMu sync.Mutex
var instanceRefs map[string]instance.Instance
func init() {
// Expose load to the instance package, to avoid circular imports.
instance.Load = load
// Expose validDevices to the instance package, to avoid circular imports.
instance.ValidDevices = validDevices
// Expose create to the instance package, to avoid circular imports.
instance.Create = create
}
// load creates the underlying instance type struct and returns it as an Instance.
func load(s *state.State, args db.InstanceArgs, p api.Project) (instance.Instance, error) {
var inst instance.Instance
var err error
if args.Type == instancetype.Container {
inst, err = lxcLoad(s, args, p)
} else if args.Type == instancetype.VM {
inst, err = qemuLoad(s, args, p)
} else {
return nil, fmt.Errorf("Invalid instance type for instance %s", args.Name)
}
if err != nil {
return nil, err
}
return inst, nil
}
// validDevices validate instance device configs.
func validDevices(state *state.State, p api.Project, instanceType instancetype.Type, localDevices deviceConfig.Devices, expandedDevices deviceConfig.Devices) error {
instConf := &common{
dbType: instanceType,
localDevices: localDevices.Clone(),
expandedDevices: expandedDevices.Clone(),
project: p,
}
var checkedDevices []string
checkDevices := func(devices deviceConfig.Devices, expanded bool) error {
// Check each device individually using the device package.
for deviceName, deviceConfig := range devices {
if expanded && slices.Contains(checkedDevices, deviceName) {
continue // Don't check the device twice if present in both local and expanded.
}
// Enforce a maximum name length of 64 characters.
// This is a safe maximum allowing use for sockets and other filesystem use.
if len(deviceName) > 64 {
return fmt.Errorf("The maximum device name length is 64 characters")
}
err := device.Validate(instConf, state, deviceName, deviceConfig)
if err != nil {
if expanded && errors.Is(err, device.ErrUnsupportedDevType) {
// Skip unsupported devices in expanded config.
// This allows mixed instance type profiles to be used where some devices
// are only supported with specific instance types.
continue
}
return fmt.Errorf("Device validation failed for %q: %w", deviceName, err)
}
checkedDevices = append(checkedDevices, deviceName)
}
return nil
}
// Check each local device individually using the device package.
// Use the cloned config from instConf.localDevices so that the driver cannot modify it.
err := checkDevices(instConf.localDevices, false)
if err != nil {
return err
}
if len(expandedDevices) > 0 {
// Check we have a root disk if in expanded validation mode.
_, _, err := internalInstance.GetRootDiskDevice(expandedDevices.CloneNative())
if err != nil {
return fmt.Errorf("Failed detecting root disk device: %w", err)
}
// Check each expanded device individually using the device package.
// Use the cloned config from instConf.expandedDevices so that the driver cannot modify it.
err = checkDevices(instConf.expandedDevices, true)
if err != nil {
return err
}
}
return nil
}
func create(s *state.State, args db.InstanceArgs, p api.Project) (instance.Instance, revert.Hook, error) {
if args.Type == instancetype.Container {
return lxcCreate(s, args, p)
} else if args.Type == instancetype.VM {
return qemuCreate(s, args, p)
}
return nil, nil, fmt.Errorf("Instance type invalid")
}
// DriverStatuses returns a map of DriverStatus structs for all instance type drivers.
// The first time this function is called each of the instance drivers will be probed for support and the result
// will be cached internally to make subsequent calls faster.
func DriverStatuses() map[instancetype.Type]*DriverStatus {
driverStatusesMu.Lock()
defer driverStatusesMu.Unlock()
if driverStatuses != nil {
return driverStatuses
}
driverStatuses = make(map[instancetype.Type]*DriverStatus, len(instanceDrivers))
for _, instanceDriver := range instanceDrivers {
driverStatus := &DriverStatus{}
driverInfo := instanceDriver().Info()
driverStatus.Info = driverInfo
driverStatus.Supported = true
if driverInfo.Error != nil || driverInfo.Version == "" {
logger.Warn("Instance type not operational", logger.Ctx{"type": driverInfo.Type, "driver": driverInfo.Name, "err": driverInfo.Error})
driverStatus.Supported = false
driverStatus.Warning = &cluster.Warning{
TypeCode: warningtype.InstanceTypeNotOperational,
LastMessage: fmt.Sprintf("%v", driverInfo.Error),
}
} else {
logger.Info("Instance type operational", logger.Ctx{"type": driverInfo.Type, "driver": driverInfo.Name, "features": driverInfo.Features})
}
driverStatuses[driverInfo.Type] = driverStatus
}
return driverStatuses
}
// instanceRefGet retrieves an instance reference.
func instanceRefGet(projectName string, instName string) instance.Instance {
instanceRefsMu.Lock()
defer instanceRefsMu.Unlock()
return instanceRefs[project.Instance(projectName, instName)]
}
// instanceRefSet stores a reference to an instance.
func instanceRefSet(inst instance.Instance) {
instanceRefsMu.Lock()
defer instanceRefsMu.Unlock()
if instanceRefs == nil {
instanceRefs = make(map[string]instance.Instance)
}
instanceRefs[project.Instance(inst.Project().Name, inst.Name())] = inst
}
// instanceRefClear removes an instance reference.
func instanceRefClear(inst instance.Instance) {
instanceRefsMu.Lock()
defer instanceRefsMu.Unlock()
delete(instanceRefs, project.Instance(inst.Project().Name, inst.Name()))
}