mirror of
https://github.com/openfaas/faasd.git
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42e9c91ee9
This patch completes part of the work in #20 by porting the code for faas-containerd in-tree. When tested, I was able to deploy and then remove figlet from the store on `x86_64`. In a follow-up PR, duplication will be removed where possible and consolidated with updated documentation. Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>
67 lines
1.2 KiB
Go
67 lines
1.2 KiB
Go
// +build go1.10
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// Copyright Weaveworks
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// github.com/weaveworks/weave/net
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package handlers
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import (
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"errors"
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"fmt"
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"path/filepath"
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"runtime"
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"github.com/vishvananda/netlink"
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"github.com/vishvananda/netns"
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)
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var ErrLinkNotFound = errors.New("Link not found")
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func WithNetNS(ns netns.NsHandle, work func() error) error {
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runtime.LockOSThread()
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defer runtime.UnlockOSThread()
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oldNs, err := netns.Get()
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if err == nil {
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defer oldNs.Close()
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err = netns.Set(ns)
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if err == nil {
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defer netns.Set(oldNs)
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err = work()
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}
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}
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return err
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}
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func WithNetNSLink(ns netns.NsHandle, ifName string, work func(link netlink.Link) error) error {
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return WithNetNS(ns, func() error {
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link, err := netlink.LinkByName(ifName)
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if err != nil {
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if err.Error() == errors.New("Link not found").Error() {
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return ErrLinkNotFound
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}
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return err
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}
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return work(link)
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})
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}
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func WithNetNSByPath(path string, work func() error) error {
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ns, err := netns.GetFromPath(path)
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if err != nil {
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return err
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}
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return WithNetNS(ns, work)
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}
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func NSPathByPid(pid int) string {
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return NSPathByPidWithRoot("/", pid)
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}
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func NSPathByPidWithRoot(root string, pid int) string {
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return filepath.Join(root, fmt.Sprintf("/proc/%d/ns/net", pid))
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}
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