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kubelet/kubenet: simplify getting nsenter path

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This commit is contained in:
Dan Williams 2016-06-22 14:26:11 -05:00
parent a657d0587b
commit e47d020cb6
1 changed files with 7 additions and 17 deletions
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24
pkg/kubelet/network/kubenet/kubenet_linux.go
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@ -95,6 +95,7 @@ func NewPlugin(networkPluginDir string) network.NetworkPlugin {
func (plugin *kubenetNetworkPlugin) Init(host network.Host, hairpinMode componentconfig.HairpinMode, nonMasqueradeCIDR string) error {
plugin.host = host
plugin.hairpinMode = hairpinMode
plugin.nonMasqueradeCIDR = nonMasqueradeCIDR
plugin.cniConfig = &libcni.CNIConfig{
Path: []string{DefaultCNIDir, plugin.vendorDir},
}
@ -127,7 +128,11 @@ func (plugin *kubenetNetworkPlugin) Init(host network.Host, hairpinMode componen
return fmt.Errorf("Failed to generate loopback config: %v", err)
}
plugin.nonMasqueradeCIDR = nonMasqueradeCIDR
plugin.nsenterPath, err = plugin.execer.LookPath("nsenter")
if err != nil {
return fmt.Errorf("Failed to find nsenter binary: %v", err)
}
// Need to SNAT outbound traffic from cluster
if err = plugin.ensureMasqRule(); err != nil {
return err
@ -463,11 +468,7 @@ func (plugin *kubenetNetworkPlugin) GetPodNetworkStatus(namespace string, name s
if err != nil {
return nil, fmt.Errorf("Kubenet failed to retrieve network namespace path: %v", err)
}
nsenterPath, err := plugin.getNsenterPath()
if err != nil {
return nil, err
}
ip, err := network.GetPodIP(plugin.execer, nsenterPath, netnsPath, network.DefaultInterfaceName)
ip, err := network.GetPodIP(plugin.execer, plugin.nsenterPath, netnsPath, network.DefaultInterfaceName)
if err != nil {
return nil, err
}
@ -556,17 +557,6 @@ func (plugin *kubenetNetworkPlugin) delContainerFromNetwork(config *libcni.Netwo
return nil
}
func (plugin *kubenetNetworkPlugin) getNsenterPath() (string, error) {
if plugin.nsenterPath == "" {
nsenterPath, err := plugin.execer.LookPath("nsenter")
if err != nil {
return "", err
}
plugin.nsenterPath = nsenterPath
}
return plugin.nsenterPath, nil
}
// shaper retrieves the bandwidth shaper and, if it hasn't been fetched before,
// initializes it and ensures the bridge is appropriately configured
// This function should only be called while holding the `plugin.mu` lock