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hard_reset.go
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/
hard_reset.go
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/*
// Copyright (c) 2016 Intel Corporation
//
// 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 (
"bufio"
"fmt"
"io/ioutil"
"net"
"os"
"path"
"path/filepath"
"time"
"context"
"github.com/docker/engine-api/types"
"github.com/golang/glog"
)
func dockerKillInstance(instanceDir string) {
idPath := path.Join(instanceDir, "docker-id")
data, err := ioutil.ReadFile(idPath)
if err != nil {
glog.Errorf("Unable to read docker container ID %v", err)
return
}
cli, err := getDockerClient()
if err != nil {
return
}
dockerID := string(data)
err = cli.ContainerRemove(context.Background(),
types.ContainerRemoveOptions{
ContainerID: dockerID,
Force: true})
if err != nil {
glog.Warningf("Unable to delete docker instance %s err %v", dockerID, err)
}
}
func qemuKillInstance(instanceDir string) {
var conn net.Conn
qmpSocket := path.Join(instanceDir, "socket")
conn, err := net.DialTimeout("unix", qmpSocket, time.Second*30)
if err != nil {
return
}
defer func() { _ = conn.Close() }()
_, err = fmt.Fprintln(conn, "{ \"execute\": \"qmp_capabilities\" }")
if err != nil {
glog.Errorf("Unable to send qmp_capabilities to instance %s: %v", instanceDir, err)
return
}
glog.Infof("Powering Down %s", instanceDir)
_, err = fmt.Fprintln(conn, "{ \"execute\": \"quit\" }")
if err != nil {
glog.Errorf("Unable to send power down command to %s: %v\n", instanceDir, err)
}
// Keep reading until the socket fails. If we close the socket straight away, qemu does not
// honour our quit command.
scanner := bufio.NewScanner(conn)
for scanner.Scan() {
}
return
}
func purgeLauncherState() {
glog.Info("======= HARD RESET ======")
glog.Info("Shutting down running instances")
toRemove := make([]string, 0, 1024)
dockerNetworking := false
glog.Info("Init networking")
if err := initNetworkPhase1(); err != nil {
glog.Warningf("Failed to init network: %v\n", err)
} else {
defer shutdownNetwork()
if err := initDockerNetworking(context.Background()); err != nil {
glog.Info("Unable to initialise docker networking")
} else {
dockerNetworking = true
}
}
_ = filepath.Walk(instancesDir, func(path string, info os.FileInfo, err error) error {
if path == instancesDir {
return nil
}
if !info.IsDir() {
return nil
}
cfg, err := loadVMConfig(path)
if err != nil {
glog.Warningf("Unable to load config for %s: %v", path, err)
} else {
if cfg.Container {
dockerKillInstance(path)
} else {
qemuKillInstance(path)
}
}
toRemove = append(toRemove, path)
return nil
})
for _, p := range toRemove {
err := os.RemoveAll(p)
if err != nil {
glog.Warningf("Unable to remove instance dir for %s: %v", p, err)
}
}
if dockerNetworking {
glog.Info("Reset docker networking")
resetDockerNetworking()
}
glog.Info("Reset networking")
err := cnNet.ResetNetwork()
if err != nil {
glog.Warningf("Unable to reset network: %v", err)
}
}