85 lines
3.1 KiB
Go
85 lines
3.1 KiB
Go
package cgroups
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/docker/libcontainer/devices"
|
|
)
|
|
|
|
type Manager interface {
|
|
// Apply cgroup configuration to the process with the specified pid
|
|
Apply(pid int) error
|
|
|
|
// Returns the PIDs inside the cgroup set
|
|
GetPids() ([]int, error)
|
|
|
|
// Returns statistics for the cgroup set
|
|
GetStats() (*Stats, error)
|
|
|
|
// Toggles the freezer cgroup according with specified state
|
|
Freeze(state FreezerState) error
|
|
|
|
// Destroys the cgroup set
|
|
Destroy() error
|
|
|
|
// NewCgroupManager() and LoadCgroupManager() require following attributes:
|
|
// Paths map[string]string
|
|
// Cgroups *cgroups.Cgroup
|
|
// Paths maps cgroup subsystem to path at which it is mounted.
|
|
// Cgroups specifies specific cgroup settings for the various subsystems
|
|
|
|
// Returns cgroup paths to save in a state file and to be able to
|
|
// restore the object later.
|
|
GetPaths() map[string]string
|
|
}
|
|
|
|
type FreezerState string
|
|
|
|
const (
|
|
Undefined FreezerState = ""
|
|
Frozen FreezerState = "FROZEN"
|
|
Thawed FreezerState = "THAWED"
|
|
)
|
|
|
|
type NotFoundError struct {
|
|
Subsystem string
|
|
}
|
|
|
|
func (e *NotFoundError) Error() string {
|
|
return fmt.Sprintf("mountpoint for %s not found", e.Subsystem)
|
|
}
|
|
|
|
func NewNotFoundError(sub string) error {
|
|
return &NotFoundError{
|
|
Subsystem: sub,
|
|
}
|
|
}
|
|
|
|
func IsNotFound(err error) bool {
|
|
if err == nil {
|
|
return false
|
|
}
|
|
|
|
_, ok := err.(*NotFoundError)
|
|
return ok
|
|
}
|
|
|
|
type Cgroup struct {
|
|
Name string `json:"name,omitempty"`
|
|
Parent string `json:"parent,omitempty"` // name of parent cgroup or slice
|
|
|
|
AllowAllDevices bool `json:"allow_all_devices,omitempty"` // If this is true allow access to any kind of device within the container. If false, allow access only to devices explicitly listed in the allowed_devices list.
|
|
AllowedDevices []*devices.Device `json:"allowed_devices,omitempty"`
|
|
Memory int64 `json:"memory,omitempty"` // Memory limit (in bytes)
|
|
MemoryReservation int64 `json:"memory_reservation,omitempty"` // Memory reservation or soft_limit (in bytes)
|
|
MemorySwap int64 `json:"memory_swap,omitempty"` // Total memory usage (memory + swap); set `-1' to disable swap
|
|
CpuShares int64 `json:"cpu_shares,omitempty"` // CPU shares (relative weight vs. other containers)
|
|
CpuQuota int64 `json:"cpu_quota,omitempty"` // CPU hardcap limit (in usecs). Allowed cpu time in a given period.
|
|
CpuPeriod int64 `json:"cpu_period,omitempty"` // CPU period to be used for hardcapping (in usecs). 0 to use system default.
|
|
CpusetCpus string `json:"cpuset_cpus,omitempty"` // CPU to use
|
|
CpusetMems string `json:"cpuset_mems,omitempty"` // MEM to use
|
|
BlkioWeight int64 `json:"blkio_weight,omitempty"` // Specifies per cgroup weight, range is from 10 to 1000.
|
|
Freezer FreezerState `json:"freezer,omitempty"` // set the freeze value for the process
|
|
Slice string `json:"slice,omitempty"` // Parent slice to use for systemd
|
|
}
|