/
cgroup_linux.go
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/
cgroup_linux.go
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package configs
import (
systemdDbus "github.com/coreos/go-systemd/v22/dbus"
"github.com/opencontainers/runc/libcontainer/devices"
)
type FreezerState string
const (
Undefined FreezerState = ""
Frozen FreezerState = "FROZEN"
Thawed FreezerState = "THAWED"
)
// Cgroup holds properties of a cgroup on Linux.
type Cgroup struct {
// Name specifies the name of the cgroup
Name string `json:"name,omitempty"`
// Parent specifies the name of parent of cgroup or slice
Parent string `json:"parent,omitempty"`
// Path specifies the path to cgroups that are created and/or joined by the container.
// The path is assumed to be relative to the host system cgroup mountpoint.
Path string `json:"path"`
// ScopePrefix describes prefix for the scope name
ScopePrefix string `json:"scope_prefix"`
// Resources contains various cgroups settings to apply
*Resources
// Systemd tells if systemd should be used to manage cgroups.
Systemd bool
// SystemdProps are any additional properties for systemd,
// derived from org.systemd.property.xxx annotations.
// Ignored unless systemd is used for managing cgroups.
SystemdProps []systemdDbus.Property `json:"-"`
// Rootless tells if rootless cgroups should be used.
Rootless bool
// The host UID that should own the cgroup, or nil to accept
// the default ownership. This should only be set when the
// cgroupfs is to be mounted read/write.
// Not all cgroup manager implementations support changing
// the ownership.
OwnerUID *int `json:"owner_uid,omitempty"`
}
type Resources struct {
// Devices is the set of access rules for devices in the container.
Devices []*devices.Rule `json:"devices"`
// Memory limit (in bytes)
Memory int64 `json:"memory"`
// Memory reservation or soft_limit (in bytes)
MemoryReservation int64 `json:"memory_reservation"`
// Total memory usage (memory + swap); set `-1` to enable unlimited swap
MemorySwap int64 `json:"memory_swap"`
// CPU shares (relative weight vs. other containers)
CpuShares uint64 `json:"cpu_shares"`
// CPU hardcap limit (in usecs). Allowed cpu time in a given period.
CpuQuota int64 `json:"cpu_quota"`
// CPU period to be used for hardcapping (in usecs). 0 to use system default.
CpuPeriod uint64 `json:"cpu_period"`
// How many time CPU will use in realtime scheduling (in usecs).
CpuRtRuntime int64 `json:"cpu_rt_quota"`
// CPU period to be used for realtime scheduling (in usecs).
CpuRtPeriod uint64 `json:"cpu_rt_period"`
// CPU to use
CpusetCpus string `json:"cpuset_cpus"`
// MEM to use
CpusetMems string `json:"cpuset_mems"`
// Process limit; set <= `0' to disable limit.
PidsLimit int64 `json:"pids_limit"`
// Specifies per cgroup weight, range is from 10 to 1000.
BlkioWeight uint16 `json:"blkio_weight"`
// Specifies tasks' weight in the given cgroup while competing with the cgroup's child cgroups, range is from 10 to 1000, cfq scheduler only
BlkioLeafWeight uint16 `json:"blkio_leaf_weight"`
// Weight per cgroup per device, can override BlkioWeight.
BlkioWeightDevice []*WeightDevice `json:"blkio_weight_device"`
// IO read rate limit per cgroup per device, bytes per second.
BlkioThrottleReadBpsDevice []*ThrottleDevice `json:"blkio_throttle_read_bps_device"`
// IO write rate limit per cgroup per device, bytes per second.
BlkioThrottleWriteBpsDevice []*ThrottleDevice `json:"blkio_throttle_write_bps_device"`
// IO read rate limit per cgroup per device, IO per second.
BlkioThrottleReadIOPSDevice []*ThrottleDevice `json:"blkio_throttle_read_iops_device"`
// IO write rate limit per cgroup per device, IO per second.
BlkioThrottleWriteIOPSDevice []*ThrottleDevice `json:"blkio_throttle_write_iops_device"`
// set the freeze value for the process
Freezer FreezerState `json:"freezer"`
// Hugetlb limit (in bytes)
HugetlbLimit []*HugepageLimit `json:"hugetlb_limit"`
// Whether to disable OOM Killer
OomKillDisable bool `json:"oom_kill_disable"`
// Tuning swappiness behaviour per cgroup
MemorySwappiness *uint64 `json:"memory_swappiness"`
// Set priority of network traffic for container
NetPrioIfpriomap []*IfPrioMap `json:"net_prio_ifpriomap"`
// Set class identifier for container's network packets
NetClsClassid uint32 `json:"net_cls_classid_u"`
// Rdma resource restriction configuration
Rdma map[string]LinuxRdma `json:"rdma"`
// Used on cgroups v2:
// CpuWeight sets a proportional bandwidth limit.
CpuWeight uint64 `json:"cpu_weight"`
// Unified is cgroupv2-only key-value map.
Unified map[string]string `json:"unified"`
// SkipDevices allows to skip configuring device permissions.
// Used by e.g. kubelet while creating a parent cgroup (kubepods)
// common for many containers, and by runc update.
//
// NOTE it is impossible to start a container which has this flag set.
SkipDevices bool `json:"-"`
// SkipFreezeOnSet is a flag for cgroup manager to skip the cgroup
// freeze when setting resources. Only applicable to systemd legacy
// (i.e. cgroup v1) manager (which uses freeze by default to avoid
// spurious permission errors caused by systemd inability to update
// device rules in a non-disruptive manner).
//
// If not set, a few methods (such as looking into cgroup's
// devices.list and querying the systemd unit properties) are used
// during Set() to figure out whether the freeze is required. Those
// methods may be relatively slow, thus this flag.
SkipFreezeOnSet bool `json:"-"`
}