mirror of https://github.com/k3s-io/k3s
59 lines
1.3 KiB
Go
59 lines
1.3 KiB
Go
// +build linux
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package main
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import (
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"os"
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"github.com/opencontainers/runc/libcontainer/system"
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"github.com/urfave/cli"
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)
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func shouldUseRootlessCgroupManager(context *cli.Context) (bool, error) {
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if context != nil {
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b, err := parseBoolOrAuto(context.GlobalString("rootless"))
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if err != nil {
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return false, err
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}
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// nil b stands for "auto detect"
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if b != nil {
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return *b, nil
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}
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if context.GlobalBool("systemd-cgroup") {
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return false, nil
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}
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}
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if os.Geteuid() != 0 {
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return true, nil
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}
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if !system.RunningInUserNS() {
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// euid == 0 , in the initial ns (i.e. the real root)
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return false, nil
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}
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// euid = 0, in a userns.
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// As we are unaware of cgroups path, we can't determine whether we have the full
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// access to the cgroups path.
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// Either way, we can safely decide to use the rootless cgroups manager.
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return true, nil
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}
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func shouldHonorXDGRuntimeDir() bool {
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if os.Getenv("XDG_RUNTIME_DIR") == "" {
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return false
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}
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if os.Geteuid() != 0 {
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return true
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}
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if !system.RunningInUserNS() {
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// euid == 0 , in the initial ns (i.e. the real root)
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// in this case, we should use /run/runc and ignore
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// $XDG_RUNTIME_DIR (e.g. /run/user/0) for backward
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// compatibility.
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return false
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}
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// euid = 0, in a userns.
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u, ok := os.LookupEnv("USER")
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return !ok || u != "root"
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}
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