104 lines
2.6 KiB
Go
104 lines
2.6 KiB
Go
// +build linux
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package fs2
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import (
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"bufio"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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"github.com/opencontainers/runc/libcontainer/cgroups"
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"github.com/opencontainers/runc/libcontainer/cgroups/fscommon"
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"github.com/opencontainers/runc/libcontainer/configs"
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"github.com/pkg/errors"
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)
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func setMemory(dirPath string, cgroup *configs.Cgroup) error {
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if cgroup.Resources.MemorySwap != 0 {
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if err := fscommon.WriteFile(dirPath, "memory.swap.max", strconv.FormatInt(cgroup.Resources.MemorySwap, 10)); err != nil {
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return err
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}
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}
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if cgroup.Resources.Memory != 0 {
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if err := fscommon.WriteFile(dirPath, "memory.max", strconv.FormatInt(cgroup.Resources.Memory, 10)); err != nil {
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return err
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}
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}
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// cgroup.Resources.KernelMemory is ignored
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if cgroup.Resources.MemoryReservation != 0 {
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if err := fscommon.WriteFile(dirPath, "memory.low", strconv.FormatInt(cgroup.Resources.MemoryReservation, 10)); err != nil {
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return err
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}
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}
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return nil
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}
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func statMemory(dirPath string, stats *cgroups.Stats) error {
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// Set stats from memory.stat.
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statsFile, err := os.Open(filepath.Join(dirPath, "memory.stat"))
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if err != nil {
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return err
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}
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defer statsFile.Close()
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sc := bufio.NewScanner(statsFile)
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for sc.Scan() {
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t, v, err := fscommon.GetCgroupParamKeyValue(sc.Text())
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if err != nil {
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return errors.Wrapf(err, "failed to parse memory.stat (%q)", sc.Text())
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}
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stats.MemoryStats.Stats[t] = v
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}
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stats.MemoryStats.Cache = stats.MemoryStats.Stats["cache"]
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memoryUsage, err := getMemoryDataV2(dirPath, "")
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if err != nil {
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return err
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}
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stats.MemoryStats.Usage = memoryUsage
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swapUsage, err := getMemoryDataV2(dirPath, "swap")
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if err != nil {
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return err
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}
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stats.MemoryStats.SwapUsage = swapUsage
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stats.MemoryStats.UseHierarchy = true
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return nil
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}
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func getMemoryDataV2(path, name string) (cgroups.MemoryData, error) {
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memoryData := cgroups.MemoryData{}
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moduleName := "memory"
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if name != "" {
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moduleName = strings.Join([]string{"memory", name}, ".")
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}
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usage := strings.Join([]string{moduleName, "current"}, ".")
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limit := strings.Join([]string{moduleName, "max"}, ".")
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value, err := fscommon.GetCgroupParamUint(path, usage)
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if err != nil {
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if moduleName != "memory" && os.IsNotExist(err) {
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return cgroups.MemoryData{}, nil
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}
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return cgroups.MemoryData{}, errors.Wrapf(err, "failed to parse %s", usage)
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}
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memoryData.Usage = value
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value, err = fscommon.GetCgroupParamUint(path, limit)
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if err != nil {
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if moduleName != "memory" && os.IsNotExist(err) {
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return cgroups.MemoryData{}, nil
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}
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return cgroups.MemoryData{}, errors.Wrapf(err, "failed to parse %s", limit)
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}
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memoryData.Limit = value
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return memoryData, nil
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}
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