github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/test/benchmarks/harness/machine.go (about)

     1  // Copyright 2020 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package harness
    16  
    17  import (
    18  	"context"
    19  	"errors"
    20  	"net"
    21  	"os/exec"
    22  
    23  	"github.com/SagerNet/gvisor/pkg/test/dockerutil"
    24  	"github.com/SagerNet/gvisor/pkg/test/testutil"
    25  )
    26  
    27  // Machine describes a real machine for use in benchmarks.
    28  type Machine interface {
    29  	// GetContainer gets a container from the machine. The container uses the
    30  	// runtime under test and is profiled if requested by flags.
    31  	GetContainer(ctx context.Context, log testutil.Logger) *dockerutil.Container
    32  
    33  	// GetNativeContainer gets a native container from the machine. Native containers
    34  	// use runc by default and are not profiled.
    35  	GetNativeContainer(ctx context.Context, log testutil.Logger) *dockerutil.Container
    36  
    37  	// RunCommand runs cmd on this machine.
    38  	RunCommand(cmd string, args ...string) (string, error)
    39  
    40  	// Returns IP Address for the machine.
    41  	IPAddress() (net.IP, error)
    42  
    43  	// CleanUp cleans up this machine.
    44  	CleanUp()
    45  }
    46  
    47  // localMachine describes this machine.
    48  type localMachine struct {
    49  }
    50  
    51  // GetContainer implements Machine.GetContainer for localMachine.
    52  func (l *localMachine) GetContainer(ctx context.Context, logger testutil.Logger) *dockerutil.Container {
    53  	return dockerutil.MakeContainer(ctx, logger)
    54  }
    55  
    56  // GetContainer implements Machine.GetContainer for localMachine.
    57  func (l *localMachine) GetNativeContainer(ctx context.Context, logger testutil.Logger) *dockerutil.Container {
    58  	return dockerutil.MakeNativeContainer(ctx, logger)
    59  }
    60  
    61  // RunCommand implements Machine.RunCommand for localMachine.
    62  func (l *localMachine) RunCommand(cmd string, args ...string) (string, error) {
    63  	c := exec.Command(cmd, args...)
    64  	out, err := c.CombinedOutput()
    65  	return string(out), err
    66  }
    67  
    68  // IPAddress implements Machine.IPAddress.
    69  func (l *localMachine) IPAddress() (net.IP, error) {
    70  	addrs, err := net.InterfaceAddrs()
    71  	if err != nil {
    72  		return net.IP{}, err
    73  	}
    74  	for _, a := range addrs {
    75  		if ipnet, ok := a.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
    76  			if ipnet.IP.To4() != nil {
    77  				return ipnet.IP, nil
    78  			}
    79  		}
    80  	}
    81  	// Unable to locate non-loopback address.
    82  	return nil, errors.New("no IPAddress available")
    83  }
    84  
    85  // CleanUp implements Machine.CleanUp and does nothing for localMachine.
    86  func (*localMachine) CleanUp() {
    87  }