mirror of https://github.com/k3s-io/k3s
65 lines
1.4 KiB
Go
65 lines
1.4 KiB
Go
package rootless
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import (
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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"golang.org/x/sys/unix"
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)
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func setupMounts(stateDir string) error {
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mountMap := [][]string{
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{"/run", ""},
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{"/var/run", ""},
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{"/var/log", filepath.Join(stateDir, "logs")},
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{"/var/lib/cni", filepath.Join(stateDir, "cni")},
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}
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for _, v := range mountMap {
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if err := setupMount(v[0], v[1]); err != nil {
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return errors.Wrapf(err, "failed to setup mount %s => %s", v[0], v[1])
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}
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}
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return nil
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}
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func setupMount(target, dir string) error {
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toCreate := target
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for {
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if toCreate == "/" {
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return fmt.Errorf("missing /%s on the root filesystem", strings.Split(target, "/")[0])
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}
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if err := os.MkdirAll(toCreate, 0700); err == nil {
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break
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}
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toCreate = filepath.Base(toCreate)
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}
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logrus.Debug("Mounting none ", toCreate, " tmpfs")
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if err := unix.Mount("none", toCreate, "tmpfs", 0, ""); err != nil {
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return errors.Wrapf(err, "failed to mount tmpfs to %s", toCreate)
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}
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if err := os.MkdirAll(target, 0700); err != nil {
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return errors.Wrapf(err, "failed to create directory %s")
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}
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if dir == "" {
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return nil
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}
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if err := os.MkdirAll(dir, 0700); err != nil {
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return errors.Wrapf(err, "failed to create directory %s")
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}
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logrus.Debug("Mounting ", dir, target, " none bind")
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return unix.Mount(dir, target, "none", unix.MS_BIND, "")
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}
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