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Signed-off-by: Ye Sijun <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,161 @@ | ||
| /* | ||
| Copyright The containerd Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
| "strings" | ||
|
|
||
| "github.com/containerd/containerd" | ||
| "github.com/containerd/nerdctl/pkg/labels" | ||
| "github.com/containerd/nerdctl/pkg/netutil" | ||
| "github.com/containerd/nerdctl/pkg/netutil/nettype" | ||
| "github.com/sirupsen/logrus" | ||
| "github.com/spf13/cobra" | ||
| ) | ||
|
|
||
| func newNetworkPruneCommand() *cobra.Command { | ||
| networkPruneCommand := &cobra.Command{ | ||
| Use: "prune [flags]", | ||
| Short: "Remove all unused networks", | ||
| Args: cobra.NoArgs, | ||
| RunE: networkPruneAction, | ||
| SilenceUsage: true, | ||
| SilenceErrors: true, | ||
| } | ||
| networkPruneCommand.Flags().BoolP("force", "f", false, "Do not prompt for confirmation") | ||
| return networkPruneCommand | ||
| } | ||
|
|
||
| func networkPruneAction(cmd *cobra.Command, args []string) error { | ||
| cniPath, err := cmd.Flags().GetString("cni-path") | ||
| if err != nil { | ||
| return err | ||
| } | ||
| cniNetconfpath, err := cmd.Flags().GetString("cni-netconfpath") | ||
| if err != nil { | ||
| return err | ||
| } | ||
| force, err := cmd.Flags().GetBool("force") | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if !force { | ||
| var confirm string | ||
| msg := "This will remove all custom networks not used by at least one container." | ||
| msg += "\nAre you sure you want to continue? [y/N] " | ||
|
|
||
| fmt.Fprintf(cmd.OutOrStdout(), "WARNING! %s", msg) | ||
| fmt.Fscanf(cmd.InOrStdin(), "%s", &confirm) | ||
|
|
||
| if strings.ToLower(confirm) != "y" { | ||
| return nil | ||
| } | ||
| } | ||
|
|
||
| e, err := netutil.NewCNIEnv(cniPath, cniNetconfpath) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| client, ctx, cancel, err := newClient(cmd) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer cancel() | ||
|
|
||
| containers, err := client.Containers(ctx) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| usedNetworks, err := usedNetworks(ctx, containers) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| var removedNetworks []string // nolint: prealloc | ||
| for _, net := range e.Networks { | ||
| if net.Name == "host" || net.Name == "none" { | ||
| continue | ||
| } | ||
| if net.NerdctlID == nil || net.File == "" { | ||
| continue | ||
| } | ||
| if _, ok := usedNetworks[net.Name]; ok { | ||
| continue | ||
| } | ||
| if err := e.RemoveNetwork(net); err != nil { | ||
| logrus.WithError(err).Errorf("failed to remove network %s", net.Name) | ||
| continue | ||
| } | ||
| removedNetworks = append(removedNetworks, net.Name) | ||
| } | ||
|
|
||
| if len(removedNetworks) > 0 { | ||
| fmt.Fprintln(cmd.OutOrStdout(), "Deleted Networks:") | ||
| for _, name := range removedNetworks { | ||
| fmt.Fprintln(cmd.OutOrStdout(), name) | ||
| } | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| func usedNetworks(ctx context.Context, containers []containerd.Container) (map[string]struct{}, error) { | ||
| used := make(map[string]struct{}) | ||
| for _, c := range containers { | ||
| task, err := c.Task(ctx, nil) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| status, err := task.Status(ctx) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| switch status.Status { | ||
| case containerd.Paused, containerd.Running: | ||
| default: | ||
| continue | ||
| } | ||
| l, err := c.Labels(ctx) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| networkJSON, ok := l[labels.Networks] | ||
| if !ok { | ||
| continue | ||
| } | ||
| var networks []string | ||
| if err := json.Unmarshal([]byte(networkJSON), &networks); err != nil { | ||
| return nil, err | ||
| } | ||
| netType, err := nettype.Detect(networks) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if netType != nettype.CNI { | ||
| continue | ||
| } | ||
| for _, n := range networks { | ||
| used[n] = struct{}{} | ||
| } | ||
| } | ||
| return used, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| /* | ||
| Copyright The containerd Authors. | ||
| Licensed under the Apache License, Version 2.0 (the "License"); | ||
| you may not use this file except in compliance with the License. | ||
| You may obtain a copy of the License at | ||
| http://www.apache.org/licenses/LICENSE-2.0 | ||
| Unless required by applicable law or agreed to in writing, software | ||
| distributed under the License is distributed on an "AS IS" BASIS, | ||
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| See the License for the specific language governing permissions and | ||
| limitations under the License. | ||
| */ | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
||
| "github.com/containerd/nerdctl/pkg/testutil" | ||
| ) | ||
|
|
||
| func TestNetworkPrune(t *testing.T) { | ||
| base := testutil.NewBase(t) | ||
| testNetwork := testutil.Identifier(t) | ||
| base.Cmd("network", "create", testNetwork).AssertOK() | ||
| defer base.Cmd("network", "prune", "-f").Run() | ||
|
|
||
| tID := testutil.Identifier(t) | ||
| base.Cmd("run", "-d", "--net", testNetwork, "--name", tID, testutil.NginxAlpineImage).AssertOK() | ||
| defer base.Cmd("rm", "-f", tID).Run() | ||
|
|
||
| base.Cmd("network", "prune", "-f").AssertNoOut(testNetwork) | ||
| base.Cmd("stop", tID).AssertOK() | ||
| base.Cmd("network", "prune", "-f").AssertOutContains(testNetwork) | ||
| } |