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// Copyright 2018 The gVisor 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 cmd
import (
"context"
"fmt"
"os"
"flag"
"github.com/google/subcommands"
"gvisor.dev/gvisor/pkg/log"
"gvisor.dev/gvisor/runsc/boot"
"gvisor.dev/gvisor/runsc/container"
)
// Delete implements subcommands.Command for the "delete" command.
type Delete struct {
// force indicates that the container should be terminated if running.
force bool
}
// Name implements subcommands.Command.Name.
func (*Delete) Name() string {
return "delete"
}
// Synopsis implements subcommands.Command.Synopsis.
func (*Delete) Synopsis() string {
return "delete resources held by a container"
}
// Usage implements subcommands.Command.Usage.
func (*Delete) Usage() string {
return `delete [flags] <container ids>`
}
// SetFlags implements subcommands.Command.SetFlags.
func (d *Delete) SetFlags(f *flag.FlagSet) {
f.BoolVar(&d.force, "force", false, "terminate container if running")
}
// Execute implements subcommands.Command.Execute.
func (d *Delete) Execute(_ context.Context, f *flag.FlagSet, args ...interface{}) subcommands.ExitStatus {
if f.NArg() == 0 {
f.Usage()
return subcommands.ExitUsageError
}
conf := args[0].(*boot.Config)
if err := d.execute(f.Args(), conf); err != nil {
Fatalf("%v", err)
}
return subcommands.ExitSuccess
}
func (d *Delete) execute(ids []string, conf *boot.Config) error {
for _, id := range ids {
c, err := container.Load(conf.RootDir, id)
if err != nil {
if os.IsNotExist(err) && d.force {
log.Warningf("couldn't find container %q: %v", id, err)
return nil
}
return fmt.Errorf("loading container %q: %v", id, err)
}
if !d.force && c.Status != container.Created && c.Status != container.Stopped {
return fmt.Errorf("cannot delete container that is not stopped without --force flag")
}
if err := c.Destroy(); err != nil {
return fmt.Errorf("destroying container: %v", err)
}
}
return nil
}
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