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39 lines
894 B
Go
39 lines
894 B
Go
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package specconv
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import (
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"io/ioutil"
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"strconv"
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"github.com/opencontainers/runtime-spec/specs-go"
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)
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// ToRootless converts spec to be compatible with "rootless" runc.
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// * Remove cgroups (will be supported in separate PR when delegation permission is configured)
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// * Fix up OOMScoreAdj
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func ToRootless(spec *specs.Spec) error {
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return toRootless(spec, getCurrentOOMScoreAdj())
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}
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func getCurrentOOMScoreAdj() int {
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b, err := ioutil.ReadFile("/proc/self/oom_score_adj")
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if err != nil {
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return 0
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}
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i, err := strconv.Atoi(string(b))
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if err != nil {
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return 0
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}
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return i
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}
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func toRootless(spec *specs.Spec, currentOOMScoreAdj int) error {
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// Remove cgroup settings.
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spec.Linux.Resources = nil
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spec.Linux.CgroupsPath = ""
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if spec.Process.OOMScoreAdj != nil && *spec.Process.OOMScoreAdj < currentOOMScoreAdj {
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*spec.Process.OOMScoreAdj = currentOOMScoreAdj
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}
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return nil
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}
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