kubernetes: github.com/erimatnor/kubernetes/pkg/util/mount Index | Files

package mount

import "github.com/erimatnor/kubernetes/pkg/util/mount"

Package mount defines an interface to mounting filesystems.

TODO(thockin): This whole pkg is pretty linux-centric. As soon as we have an alternate platform, we will need to abstract further.

Index

Package Files

doc.go fake.go mount.go mount_linux.go nsenter_mount.go

Constants

const FakeActionMount = "mount"

Values for FakeAction.Action

const FakeActionUnmount = "unmount"

func GetDeviceNameFromMount Uses

func GetDeviceNameFromMount(mounter Interface, mountPath string) (string, int, error)

GetDeviceNameFromMount: given a mnt point, find the device from /proc/mounts returns the device name, reference count, and error code

func GetMountRefs Uses

func GetMountRefs(mounter Interface, mountPath string) ([]string, error)

GetMountRefs finds all other references to the device referenced by mountPath; returns a list of paths.

type FakeAction Uses

type FakeAction struct {
    Action string // "mount" or "unmount"
    Target string // applies to both mount and unmount actions
    Source string // applies only to "mount" actions
    FSType string // applies only to "mount" actions
}

FakeAction objects are logged every time a fake mount or unmount is called.

type FakeMounter Uses

type FakeMounter struct {
    MountPoints []MountPoint
    Log         []FakeAction
}

FakeMounter implements mount.Interface for tests.

func (*FakeMounter) IsMountPoint Uses

func (f *FakeMounter) IsMountPoint(file string) (bool, error)

func (*FakeMounter) List Uses

func (f *FakeMounter) List() ([]MountPoint, error)

func (*FakeMounter) Mount Uses

func (f *FakeMounter) Mount(source string, target string, fstype string, options []string) error

func (*FakeMounter) ResetLog Uses

func (f *FakeMounter) ResetLog()

func (*FakeMounter) Unmount Uses

func (f *FakeMounter) Unmount(target string) error

type Interface Uses

type Interface interface {
    // Mount mounts source to target as fstype with given options.
    Mount(source string, target string, fstype string, options []string) error
    // Unmount unmounts given target.
    Unmount(target string) error
    // List returns a list of all mounted filesystems.  This can be large.
    // On some platforms, reading mounts is not guaranteed consistent (i.e.
    // it could change between chunked reads). This is guaranteed to be
    // consistent.
    List() ([]MountPoint, error)
    // IsMountPoint determines if a directory is a mountpoint.
    IsMountPoint(file string) (bool, error)
}

func New Uses

func New() Interface

New returns a mount.Interface for the current system.

type MountPoint Uses

type MountPoint struct {
    Device string
    Path   string
    Type   string
    Opts   []string
    Freq   int
    Pass   int
}

This represents a single line in /proc/mounts or /etc/fstab.

type Mounter Uses

type Mounter struct{}

Mounter provides the default implementation of mount.Interface for the linux platform. This implementation assumes that the kubelet is running in the host's root mount namespace.

func (*Mounter) IsMountPoint Uses

func (mounter *Mounter) IsMountPoint(file string) (bool, error)

IsMountPoint determines if a directory is a mountpoint, by comparing the device for the directory with the device for it's parent. If they are the same, it's not a mountpoint, if they're different, it is.

func (*Mounter) List Uses

func (*Mounter) List() ([]MountPoint, error)

List returns a list of all mounted filesystems.

func (*Mounter) Mount Uses

func (mounter *Mounter) Mount(source string, target string, fstype string, options []string) error

Mount mounts source to target as fstype with given options. 'source' and 'fstype' must be an emtpy string in case it's not required, e.g. for remount, or for auto filesystem type, where kernel handles fs type for you. The mount 'options' is a list of options, currently come from mount(8), e.g. "ro", "remount", "bind", etc. If no more option is required, call Mount with an empty string list or nil.

func (*Mounter) Unmount Uses

func (mounter *Mounter) Unmount(target string) error

Unmount unmounts the target.

type NsenterMounter Uses

type NsenterMounter struct{}

NsenterMounter is part of experimental support for running the kubelet in a container. Currently, all docker containers receive their own mount namespaces. NsenterMounter works by executing nsenter to run commands in the host's mount namespace.

NsenterMounter requires:

1. Docker >= 1.6 due to the dependency on the slave propagation mode

of the bind-mount of the kubelet root directory in the container.
Docker 1.5 used a private propagation mode for bind-mounts, so mounts
performed in the host's mount namespace do not propagate out to the
bind-mount in this docker version.

2. The host's root filesystem must be available at /rootfs 3. The nsenter binary must be at /nsenter in the container's filesystem. 4. The Kubelet process must have CAP_SYS_ADMIN (required by nsenter); at

the present, this effectively means that the kubelet is running in a
privileged container.

For more information about mount propagation modes, see:

https://www.kernel.org/doc/Documentation/filesystems/sharedsubtree.txt

func (*NsenterMounter) IsMountPoint Uses

func (*NsenterMounter) IsMountPoint(file string) (bool, error)

IsMountPoint determines whether a path is a mountpoint by calling findmnt in the host's root mount namespace.

func (*NsenterMounter) List Uses

func (*NsenterMounter) List() ([]MountPoint, error)

List returns a list of all mounted filesystems in the host's mount namespace.

func (*NsenterMounter) Mount Uses

func (*NsenterMounter) Mount(source string, target string, fstype string, options []string) error

Mount runs mount(8) in the host's root mount namespace. Aside from this aspect, Mount has the same semantics as the mounter returned by mount.New()

func (*NsenterMounter) Unmount Uses

func (*NsenterMounter) Unmount(target string) error

Unmount runs umount(8) in the host's mount namespace.

Package mount imports 12 packages (graph). Updated 2017-05-11. Refresh now. Tools for package owners.