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Diffstat (limited to 'runsc/cmd/state.go')
-rw-r--r-- | runsc/cmd/state.go | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/runsc/cmd/state.go b/runsc/cmd/state.go new file mode 100644 index 000000000..f0d449b19 --- /dev/null +++ b/runsc/cmd/state.go @@ -0,0 +1,76 @@ +// 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" + "encoding/json" + "os" + + "flag" + "github.com/google/subcommands" + "gvisor.googlesource.com/gvisor/pkg/log" + "gvisor.googlesource.com/gvisor/runsc/boot" + "gvisor.googlesource.com/gvisor/runsc/container" +) + +// State implements subcommands.Command for the "state" command. +type State struct{} + +// Name implements subcommands.Command.Name. +func (*State) Name() string { + return "state" +} + +// Synopsis implements subcommands.Command.Synopsis. +func (*State) Synopsis() string { + return "get the state of a container" +} + +// Usage implements subcommands.Command.Usage. +func (*State) Usage() string { + return `state [flags] <container id> - get the state of a container` +} + +// SetFlags implements subcommands.Command.SetFlags. +func (*State) SetFlags(f *flag.FlagSet) {} + +// Execute implements subcommands.Command.Execute. +func (*State) Execute(_ context.Context, f *flag.FlagSet, args ...interface{}) subcommands.ExitStatus { + if f.NArg() != 1 { + f.Usage() + return subcommands.ExitUsageError + } + + id := f.Arg(0) + conf := args[0].(*boot.Config) + + c, err := container.Load(conf.RootDir, id) + if err != nil { + Fatalf("loading container: %v", err) + } + log.Debugf("Returning state for container %+v", c) + + state := c.State() + log.Debugf("State: %+v", state) + + // Write json-encoded state directly to stdout. + b, err := json.MarshalIndent(state, "", " ") + if err != nil { + Fatalf("marshaling container state: %v", err) + } + os.Stdout.Write(b) + return subcommands.ExitSuccess +} |