67 lines
1.5 KiB
Go
67 lines
1.5 KiB
Go
package cgroups
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import (
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"fmt"
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"path/filepath"
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spec "github.com/opencontainers/runtime-spec/specs-go"
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)
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type memHandler struct {
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}
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func getMemoryHandler() *memHandler {
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return &memHandler{}
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}
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// Apply set the specified constraints
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func (c *memHandler) Apply(ctr *CgroupControl, res *spec.LinuxResources) error {
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if res.Memory == nil {
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return nil
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}
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return fmt.Errorf("memory apply not implemented yet")
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}
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// Create the cgroup
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func (c *memHandler) Create(ctr *CgroupControl) (bool, error) {
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if ctr.cgroup2 {
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return false, nil
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}
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return ctr.createCgroupDirectory(Memory)
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}
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// Destroy the cgroup
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func (c *memHandler) Destroy(ctr *CgroupControl) error {
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return rmDirRecursively(ctr.getCgroupv1Path(Memory))
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}
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// Stat fills a metrics structure with usage stats for the controller
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func (c *memHandler) Stat(ctr *CgroupControl, m *Metrics) error {
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var err error
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usage := MemoryUsage{}
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var memoryRoot string
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filenames := map[string]string{}
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if ctr.cgroup2 {
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memoryRoot = filepath.Join(cgroupRoot, ctr.path)
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filenames["usage"] = "memory.current"
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filenames["limit"] = "memory.max"
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} else {
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memoryRoot = ctr.getCgroupv1Path(Memory)
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filenames["usage"] = "memory.usage_in_bytes"
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filenames["limit"] = "memory.limit_in_bytes"
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}
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usage.Usage, err = readFileAsUint64(filepath.Join(memoryRoot, filenames["usage"]))
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if err != nil {
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return err
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}
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usage.Limit, err = readFileAsUint64(filepath.Join(memoryRoot, filenames["limit"]))
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if err != nil {
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return err
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}
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m.Memory = MemoryMetrics{Usage: usage}
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return nil
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}
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