dotcloud/docker

package daemon // import "github.com/docker/docker/daemon"

import (
    "time"

    "github.com/docker/docker/api/types/container"
    libcontainerdtypes "github.com/docker/docker/libcontainerd/types"
    specs "github.com/opencontainers/runtime-spec/specs-go"
)

func toContainerdResources(resources container.Resources) *libcontainerdtypes.Resources {
    var r libcontainerdtypes.Resources

    if resources.BlkioWeight != 0 {
        r.BlockIO = &specs.LinuxBlockIO{
            Weight: &resources.BlkioWeight,
        }
    }

    cpu := specs.LinuxCPU{
        Cpus: resources.CpusetCpus,
        Mems: resources.CpusetMems,
    }
    if resources.CPUShares != 0 {
        shares := uint64(resources.CPUShares)
        cpu.Shares = &shares
    }

    var (
        period uint64
        quota  int64
    )
    if resources.NanoCPUs != 0 {
        period = uint64(100 * time.Millisecond / time.Microsecond)
        quota = resources.NanoCPUs * int64(period) / 1e9
    }
    if quota == 0 && resources.CPUQuota != 0 {
        quota = resources.CPUQuota
    }
    if period == 0 && resources.CPUPeriod != 0 {
        period = uint64(resources.CPUPeriod)
    }

    if period != 0 {
        cpu.Period = &period
    }
    if quota != 0 {
        cpu.Quota = &quota
    }

    if cpu != (specs.LinuxCPU{}) {
        r.CPU = &cpu
    }

    var memory specs.LinuxMemory
    if resources.Memory != 0 {
        memory.Limit = &resources.Memory
    }
    if resources.MemoryReservation != 0 {
        memory.Reservation = &resources.MemoryReservation
    }
    if resources.KernelMemory != 0 { //nolint:staticcheck // ignore SA1019: memory.Kernel is deprecated: kernel-memory limits are not supported in cgroups v2, and were obsoleted in [kernel v5.4]. This field should no longer be used, as it may be ignored by runtimes.
        memory.Kernel = &resources.KernelMemory //nolint:staticcheck // ignore SA1019: memory.Kernel is deprecated: kernel-memory limits are not supported in cgroups v2, and were obsoleted in [kernel v5.4]. This field should no longer be used, as it may be ignored by runtimes.
    }
    if resources.MemorySwap > 0 {
        memory.Swap = &resources.MemorySwap
    }

    if memory != (specs.LinuxMemory{}) {
        r.Memory = &memory
    }

    r.Pids = getPidsLimit(resources)
    return &r
}