mirror of
https://github.com/containers/podman.git
synced 2025-06-20 17:13:43 +08:00
Merge pull request #3978 from baude/networkremove
enhance podman network rm
This commit is contained in:
@ -280,6 +280,7 @@ type NetworkListValues struct {
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type NetworkRmValues struct {
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PodmanCommand
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Force bool
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}
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type NetworkInspectValues struct {
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@ -3,10 +3,13 @@
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package main
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import (
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"fmt"
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"github.com/containers/libpod/cmd/podman/cliconfig"
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"github.com/containers/libpod/pkg/adapter"
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"github.com/containers/libpod/pkg/rootless"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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"github.com/spf13/cobra"
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)
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@ -31,6 +34,8 @@ func init() {
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networkrmCommand.Command = _networkrmCommand
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networkrmCommand.SetHelpTemplate(HelpTemplate())
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networkrmCommand.SetUsageTemplate(UsageTemplate())
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flags := networkrmCommand.Flags()
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flags.BoolVarP(&networkrmCommand.Force, "force", "f", false, "remove any containers using network")
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}
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func networkrmCmd(c *cliconfig.NetworkRmValues) error {
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@ -40,9 +45,18 @@ func networkrmCmd(c *cliconfig.NetworkRmValues) error {
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if len(c.InputArgs) < 1 {
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return errors.Errorf("at least one network name is required")
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}
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runtime, err := adapter.GetRuntimeNoStore(getContext(), &c.PodmanCommand)
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runtime, err := adapter.GetRuntime(getContext(), &c.PodmanCommand)
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if err != nil {
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return err
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}
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return runtime.NetworkRemove(c)
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deletes, rmErrors, lastErr := runtime.NetworkRemove(getContext(), c)
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for _, d := range deletes {
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fmt.Println(d)
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}
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// we only want to print errors if there is more
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// than one
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for network, removalErr := range rmErrors {
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logrus.Errorf("unable to remove %q: %q", network, removalErr)
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}
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return lastErr
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}
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@ -1032,6 +1032,8 @@ _podman_network_rm() {
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local options_with_args="
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"
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local boolean_options="
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--force
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-f
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--help
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-h
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"
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@ -9,13 +9,26 @@ podman\-network\-rm - Remove one or more CNI networks
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## DESCRIPTION
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Delete one or more Podman networks.
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## OPTIONS
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**--force**, **-f**
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The `force` option will remove all containers that use the named network. If the container is
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running, the container will be stopped and removed.
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## EXAMPLE
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Delete the `podman9` network
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Delete the `cni-podman9` network
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```
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# podman network rm podman
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Deleted: podman9
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# podman network rm cni-podman9
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Deleted: cni-podman9
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```
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Delete the `fred` network and all containers associated with the network.
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```
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# podman network rm -f fred
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Deleted: fred
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```
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## SEE ALSO
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@ -3,9 +3,9 @@
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package adapter
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import (
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"context"
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"encoding/json"
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"fmt"
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"github.com/containers/libpod/pkg/util"
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"io/ioutil"
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"os"
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"path/filepath"
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@ -14,6 +14,7 @@ import (
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cniversion "github.com/containernetworking/cni/pkg/version"
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"github.com/containers/libpod/cmd/podman/cliconfig"
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"github.com/containers/libpod/pkg/network"
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"github.com/containers/libpod/pkg/util"
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"github.com/pkg/errors"
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)
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@ -85,16 +86,69 @@ func (r *LocalRuntime) NetworkInspect(cli *cliconfig.NetworkInspectValues) error
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}
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// NetworkRemove deletes one or more CNI networks
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func (r *LocalRuntime) NetworkRemove(cli *cliconfig.NetworkRmValues) error {
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func (r *LocalRuntime) NetworkRemove(ctx context.Context, cli *cliconfig.NetworkRmValues) ([]string, map[string]error, error) {
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var (
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networkRmSuccesses []string
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lastError error
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)
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networkRmErrors := make(map[string]error)
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for _, name := range cli.InputArgs {
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cniPath, err := network.GetCNIConfigPathByName(name)
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containers, err := r.GetAllContainers()
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if err != nil {
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return err
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return networkRmSuccesses, networkRmErrors, err
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}
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if err := os.Remove(cniPath); err != nil {
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return err
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if err := r.removeNetwork(ctx, name, containers, cli.Force); err != nil {
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if lastError != nil {
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networkRmErrors[name] = lastError
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}
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lastError = err
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} else {
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networkRmSuccesses = append(networkRmSuccesses, fmt.Sprintf("Deleted: %s\n", name))
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}
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fmt.Printf("Deleted: %s\n", name)
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}
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return networkRmSuccesses, networkRmErrors, lastError
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}
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// removeNetwork removes a single network and its containers given a force bool
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func (r *LocalRuntime) removeNetwork(ctx context.Context, name string, containers []*Container, force bool) error {
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cniPath, err := network.GetCNIConfigPathByName(name)
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if err != nil {
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return err
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}
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// We need to iterate containers looking to see if they belong to the given network
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for _, c := range containers {
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if util.StringInSlice(name, c.Config().Networks) {
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// if user passes force, we nuke containers
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if force {
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if err := r.RemoveContainer(ctx, c.Container, true, true); err != nil {
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return err
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}
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} else {
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// Without the the force option, we return an error
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return errors.Errorf("%q has associated containers with it. use -f to forcibly delete containers", name)
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}
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}
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}
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// Before we delete the configuration file, we need to make sure we can read and parse
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// it to get the network interface name so we can remove that too
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interfaceName, err := network.GetInterfaceNameFromConfig(cniPath)
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if err != nil {
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return errors.Wrapf(err, "failed to find network interface name in %q", cniPath)
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}
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liveNetworkNames, err := network.GetLiveNetworkNames()
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if err != nil {
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return errors.Wrapf(err, "failed to get live network names")
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}
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if util.StringInSlice(interfaceName, liveNetworkNames) {
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if err := network.RemoveInterface(interfaceName); err != nil {
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return errors.Wrapf(err, "failed to delete the network interface %q", interfaceName)
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}
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}
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// Remove the configuration file
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if err := os.Remove(cniPath); err != nil {
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return errors.Wrapf(err, "failed to remove network configuration file %q", cniPath)
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}
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return nil
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}
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@ -2,8 +2,10 @@ package network
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import (
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"fmt"
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"github.com/containers/libpod/pkg/util"
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"os/exec"
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"github.com/containers/libpod/pkg/util"
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"github.com/containers/libpod/utils"
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"github.com/sirupsen/logrus"
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)
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@ -39,3 +41,15 @@ func GetFreeDeviceName() (string, error) {
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}
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return deviceName, nil
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}
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// RemoveInterface removes an interface by the given name
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func RemoveInterface(interfaceName string) error {
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// Make sure we have the ip command on the system
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ipPath, err := exec.LookPath("ip")
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if err != nil {
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return err
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}
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// Delete the network interface
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_, err = utils.ExecCmd(ipPath, []string{"link", "del", interfaceName}...)
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return err
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}
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@ -86,6 +86,7 @@ func GetNetworksFromFilesystem() ([]*allocator.Net, error) {
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return nil, err
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}
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cniNetworks = append(cniNetworks, &ipamConf)
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break
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}
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}
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}
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@ -105,3 +106,26 @@ func GetNetworkNamesFromFileSystem() ([]string, error) {
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}
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return networkNames, nil
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}
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// GetInterfaceNameFromConfig returns the interface name for the bridge plugin
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func GetInterfaceNameFromConfig(path string) (string, error) {
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var name string
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conf, err := libcni.ConfListFromFile(path)
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if err != nil {
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return "", err
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}
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for _, cniplugin := range conf.Plugins {
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if cniplugin.Network.Type == "bridge" {
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plugin := make(map[string]interface{})
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if err := json.Unmarshal(cniplugin.Bytes, &plugin); err != nil {
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return "", err
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}
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name = plugin["bridge"].(string)
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break
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}
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}
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if len(name) == 0 {
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return "", errors.New("unable to find interface name for network")
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}
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return name, nil
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}
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