5a119200b8
This commit contains changes to create/delete permanent namespace for a sandbox container. Signed-off-by: Abhinandan Prativadi <abhi@docker.com>
65 lines
1.5 KiB
Go
65 lines
1.5 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package sandbox
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import (
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"fmt"
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"sync"
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cnins "github.com/containernetworking/plugins/pkg/ns"
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)
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// NetNS holds network namespace for sandbox
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type NetNS struct {
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sync.Mutex
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ns cnins.NetNS
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closed bool
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}
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// NewNetNS creates a network namespace for the sandbox
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func NewNetNS() (*NetNS, error) {
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netns, err := cnins.NewNS()
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if err != nil {
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return nil, fmt.Errorf("failed to setup network namespace %v", err)
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}
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n := new(NetNS)
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n.ns = netns
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return n, nil
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}
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// Remove removes network namepace if it exists and not closed. Remove is idempotent,
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// meaning it might be invoked multiple times and provides consistent result.
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func (n *NetNS) Remove() error {
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n.Lock()
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defer n.Unlock()
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if !n.closed {
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err := n.ns.Close()
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if err != nil {
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return err
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}
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n.closed = true
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}
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return nil
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}
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// GetPath returns network namespace path for sandbox container
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func (n *NetNS) GetPath() string {
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n.Lock()
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defer n.Unlock()
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return n.ns.Path()
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}
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