513cebe7b7
* Add Virtual Kubelet provider for VIC Initial virtual kubelet provider for VMware VIC. This provider currently handles creating and starting of a pod VM via the VIC portlayer and persona server. Image store handling via the VIC persona server. This provider currently requires the feature/wolfpack branch of VIC. * Added pod stop and delete. Also added node capacity. Added the ability to stop and delete pod VMs via VIC. Also retrieve node capacity information from the VCH. * Cleanup and readme file Some file clean up and added a Readme.md markdown file for the VIC provider. * Cleaned up errors, added function comments, moved operation code 1. Cleaned up error handling. Set standard for creating errors. 2. Added method prototype comments for all interface functions. 3. Moved PodCreator, PodStarter, PodStopper, and PodDeleter to a new folder. * Add mocking code and unit tests for podcache, podcreator, and podstarter Used the unit test framework used in VIC to handle assertions in the provider's unit test. Mocking code generated using OSS project mockery, which is compatible with the testify assertion framework. * Vendored packages for the VIC provider Requires feature/wolfpack branch of VIC and a few specific commit sha of projects used within VIC. * Implementation of POD Stopper and Deleter unit tests (#4) * Updated files for initial PR
81 lines
2.2 KiB
Go
81 lines
2.2 KiB
Go
// Package netns allows ultra-simple network namespace handling. NsHandles
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// can be retrieved and set. Note that the current namespace is thread
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// local so actions that set and reset namespaces should use LockOSThread
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// to make sure the namespace doesn't change due to a goroutine switch.
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// It is best to close NsHandles when you are done with them. This can be
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// accomplished via a `defer ns.Close()` on the handle. Changing namespaces
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// requires elevated privileges, so in most cases this code needs to be run
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// as root.
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package netns
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import (
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"fmt"
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"syscall"
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)
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// NsHandle is a handle to a network namespace. It can be cast directly
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// to an int and used as a file descriptor.
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type NsHandle int
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// Equal determines if two network handles refer to the same network
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// namespace. This is done by comparing the device and inode that the
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// file descriptors point to.
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func (ns NsHandle) Equal(other NsHandle) bool {
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if ns == other {
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return true
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}
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var s1, s2 syscall.Stat_t
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if err := syscall.Fstat(int(ns), &s1); err != nil {
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return false
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}
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if err := syscall.Fstat(int(other), &s2); err != nil {
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return false
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}
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return (s1.Dev == s2.Dev) && (s1.Ino == s2.Ino)
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}
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// String shows the file descriptor number and its dev and inode.
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func (ns NsHandle) String() string {
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var s syscall.Stat_t
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if ns == -1 {
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return "NS(None)"
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}
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if err := syscall.Fstat(int(ns), &s); err != nil {
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return fmt.Sprintf("NS(%d: unknown)", ns)
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}
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return fmt.Sprintf("NS(%d: %d, %d)", ns, s.Dev, s.Ino)
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}
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// UniqueId returns a string which uniquely identifies the namespace
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// associated with the network handle.
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func (ns NsHandle) UniqueId() string {
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var s syscall.Stat_t
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if ns == -1 {
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return "NS(none)"
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}
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if err := syscall.Fstat(int(ns), &s); err != nil {
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return "NS(unknown)"
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}
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return fmt.Sprintf("NS(%d:%d)", s.Dev, s.Ino)
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}
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// IsOpen returns true if Close() has not been called.
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func (ns NsHandle) IsOpen() bool {
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return ns != -1
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}
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// Close closes the NsHandle and resets its file descriptor to -1.
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// It is not safe to use an NsHandle after Close() is called.
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func (ns *NsHandle) Close() error {
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if err := syscall.Close(int(*ns)); err != nil {
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return err
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}
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(*ns) = -1
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return nil
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}
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// None gets an empty (closed) NsHandle.
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func None() NsHandle {
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return NsHandle(-1)
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}
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