github.com/coreos/mantle@v0.13.0/platform/machine/aws/machine.go (about)

     1  // Copyright 2016 CoreOS, Inc.
     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 aws
    16  
    17  import (
    18  	"fmt"
    19  	"os"
    20  	"path/filepath"
    21  	"strings"
    22  	"time"
    23  
    24  	"github.com/aws/aws-sdk-go/service/ec2"
    25  	"golang.org/x/crypto/ssh"
    26  
    27  	"github.com/coreos/mantle/platform"
    28  	"github.com/coreos/mantle/util"
    29  )
    30  
    31  type machine struct {
    32  	cluster *cluster
    33  	mach    *ec2.Instance
    34  	dir     string
    35  	journal *platform.Journal
    36  	console string
    37  }
    38  
    39  func (am *machine) ID() string {
    40  	return *am.mach.InstanceId
    41  }
    42  
    43  func (am *machine) IP() string {
    44  	return *am.mach.PublicIpAddress
    45  }
    46  
    47  func (am *machine) PrivateIP() string {
    48  	return *am.mach.PrivateIpAddress
    49  }
    50  
    51  func (am *machine) RuntimeConf() platform.RuntimeConfig {
    52  	return am.cluster.RuntimeConf()
    53  }
    54  
    55  func (am *machine) SSHClient() (*ssh.Client, error) {
    56  	return am.cluster.SSHClient(am.IP())
    57  }
    58  
    59  func (am *machine) PasswordSSHClient(user string, password string) (*ssh.Client, error) {
    60  	return am.cluster.PasswordSSHClient(am.IP(), user, password)
    61  }
    62  
    63  func (am *machine) SSH(cmd string) ([]byte, []byte, error) {
    64  	return am.cluster.SSH(am, cmd)
    65  }
    66  
    67  func (am *machine) Reboot() error {
    68  	return platform.RebootMachine(am, am.journal)
    69  }
    70  
    71  func (am *machine) Destroy() {
    72  	origConsole, err := am.cluster.flight.api.GetConsoleOutput(am.ID())
    73  	if err != nil {
    74  		plog.Warningf("Error retrieving console log for %v: %v", am.ID(), err)
    75  	}
    76  
    77  	if err := am.cluster.flight.api.TerminateInstances([]string{am.ID()}); err != nil {
    78  		plog.Errorf("Error terminating instance %v: %v", am.ID(), err)
    79  	}
    80  
    81  	if am.journal != nil {
    82  		am.journal.Destroy()
    83  	}
    84  
    85  	if err := am.saveConsole(origConsole); err != nil {
    86  		plog.Errorf("Error saving console for instance %v: %v", am.ID(), err)
    87  	}
    88  
    89  	am.cluster.DelMach(am)
    90  }
    91  
    92  func (am *machine) ConsoleOutput() string {
    93  	return am.console
    94  }
    95  
    96  func (am *machine) saveConsole(origConsole string) error {
    97  	// If the instance has e.g. been running for several minutes, the
    98  	// returned output will be non-empty but won't necessarily include
    99  	// the most recent log messages. So we loop until the post-termination
   100  	// logs are different from the pre-termination logs.
   101  	err := util.WaitUntilReady(5*time.Minute, 5*time.Second, func() (bool, error) {
   102  		var err error
   103  		am.console, err = am.cluster.flight.api.GetConsoleOutput(am.ID())
   104  		if err != nil {
   105  			return false, err
   106  		}
   107  
   108  		if am.console == origConsole {
   109  			plog.Debugf("waiting for console for %v", am.ID())
   110  			return false, nil
   111  		}
   112  
   113  		return true, nil
   114  	})
   115  	if err != nil {
   116  		err = fmt.Errorf("retrieving console output of %v: %v", am.ID(), err)
   117  		if origConsole != "" {
   118  			plog.Warning(err)
   119  		} else {
   120  			return err
   121  		}
   122  	}
   123  
   124  	// merge the two logs
   125  	overlapLen := 100
   126  	if len(am.console) < overlapLen {
   127  		overlapLen = len(am.console)
   128  	}
   129  	origIdx := strings.LastIndex(origConsole, am.console[0:overlapLen])
   130  	if origIdx != -1 {
   131  		// overlap
   132  		am.console = origConsole[0:origIdx] + am.console
   133  	} else if origConsole != "" {
   134  		// two logs with no overlap; add scissors
   135  		am.console = origConsole + "\n\n8<------------------------\n\n" + am.console
   136  	}
   137  
   138  	path := filepath.Join(am.dir, "console.txt")
   139  	f, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE, 0644)
   140  	if err != nil {
   141  		return err
   142  	}
   143  	defer f.Close()
   144  	f.WriteString(am.console)
   145  
   146  	return nil
   147  }
   148  
   149  func (am *machine) JournalOutput() string {
   150  	if am.journal == nil {
   151  		return ""
   152  	}
   153  
   154  	data, err := am.journal.Read()
   155  	if err != nil {
   156  		plog.Errorf("Reading journal for instance %v: %v", am.ID(), err)
   157  	}
   158  	return string(data)
   159  }