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// Copyright 2020 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 harness
import (
"context"
"errors"
"net"
"os/exec"
"gvisor.dev/gvisor/pkg/test/dockerutil"
"gvisor.dev/gvisor/pkg/test/testutil"
)
// Machine describes a real machine for use in benchmarks.
type Machine interface {
// GetContainer gets a container from the machine. The container uses the
// runtime under test and is profiled if requested by flags.
GetContainer(ctx context.Context, log testutil.Logger) *dockerutil.Container
// GetNativeContainer gets a native container from the machine. Native containers
// use runc by default and are not profiled.
GetNativeContainer(ctx context.Context, log testutil.Logger) *dockerutil.Container
// RunCommand runs cmd on this machine.
RunCommand(cmd string, args ...string) (string, error)
// Returns IP Address for the machine.
IPAddress() (net.IP, error)
// CleanUp cleans up this machine.
CleanUp()
}
// localMachine describes this machine.
type localMachine struct {
}
// GetContainer implements Machine.GetContainer for localMachine.
func (l *localMachine) GetContainer(ctx context.Context, logger testutil.Logger) *dockerutil.Container {
return dockerutil.MakeContainer(ctx, logger)
}
// GetContainer implements Machine.GetContainer for localMachine.
func (l *localMachine) GetNativeContainer(ctx context.Context, logger testutil.Logger) *dockerutil.Container {
return dockerutil.MakeNativeContainer(ctx, logger)
}
// RunCommand implements Machine.RunCommand for localMachine.
func (l *localMachine) RunCommand(cmd string, args ...string) (string, error) {
c := exec.Command(cmd, args...)
out, err := c.CombinedOutput()
return string(out), err
}
// IPAddress implements Machine.IPAddress.
func (l *localMachine) IPAddress() (net.IP, error) {
addrs, err := net.InterfaceAddrs()
if err != nil {
return net.IP{}, err
}
for _, a := range addrs {
if ipnet, ok := a.(*net.IPNet); ok && !ipnet.IP.IsLoopback() {
if ipnet.IP.To4() != nil {
return ipnet.IP, nil
}
}
}
// Unable to locate non-loopback address.
return nil, errors.New("no IPAddress available")
}
// CleanUp implements Machine.CleanUp and does nothing for localMachine.
func (*localMachine) CleanUp() {
}
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