github.com/alibaba/sealer@v0.8.6-0.20220430115802-37a2bdaa8173/utils/ssh/sshcmd.go (about)

     1  // Copyright © 2021 Alibaba Group Holding Ltd.
     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 ssh
    16  
    17  import (
    18  	"fmt"
    19  	"os/exec"
    20  	"strings"
    21  
    22  	"github.com/alibaba/sealer/common"
    23  	"github.com/alibaba/sealer/utils"
    24  )
    25  
    26  const SUDO = "sudo "
    27  
    28  func (s *SSH) Ping(host string) error {
    29  	if utils.IsLocalIP(host, s.LocalAddress) {
    30  		return nil
    31  	}
    32  	client, _, err := s.Connect(host)
    33  	if err != nil {
    34  		return fmt.Errorf("[ssh %s]create ssh session failed, %v", host, err)
    35  	}
    36  	err = client.Close()
    37  	if err != nil {
    38  		return err
    39  	}
    40  	return nil
    41  }
    42  
    43  func (s *SSH) CmdAsync(host string, cmds ...string) error {
    44  	var execFunc func(cmd string) error
    45  
    46  	if utils.IsLocalIP(host, s.LocalAddress) {
    47  		execFunc = func(cmd string) error {
    48  			c := exec.Command("/bin/sh", "-c", cmd)
    49  			stdout, err := c.StdoutPipe()
    50  			if err != nil {
    51  				return err
    52  			}
    53  
    54  			stderr, err := c.StderrPipe()
    55  			if err != nil {
    56  				return err
    57  			}
    58  
    59  			if err := c.Start(); err != nil {
    60  				return fmt.Errorf("failed to start command %s: %v", cmd, err)
    61  			}
    62  
    63  			ReadPipe(stdout, stderr, s.IsStdout)
    64  
    65  			err = c.Wait()
    66  			if err != nil {
    67  				return fmt.Errorf("failed to execute command(%s) on host(%s): error(%v)", cmd, host, err)
    68  			}
    69  			return nil
    70  		}
    71  	} else {
    72  		execFunc = func(cmd string) error {
    73  			client, session, err := s.Connect(host)
    74  			if err != nil {
    75  				return fmt.Errorf("failed to create ssh session for %s: %v", host, err)
    76  			}
    77  			defer client.Close()
    78  			defer session.Close()
    79  			stdout, err := session.StdoutPipe()
    80  			if err != nil {
    81  				return fmt.Errorf("failed to create stdout pipe for %s: %v", host, err)
    82  			}
    83  			stderr, err := session.StderrPipe()
    84  			if err != nil {
    85  				return fmt.Errorf("failed to create stderr pipe for %s: %v", host, err)
    86  			}
    87  
    88  			if err := session.Start(cmd); err != nil {
    89  				return fmt.Errorf("failed to start command %s on %s: %v", cmd, host, err)
    90  			}
    91  
    92  			ReadPipe(stdout, stderr, s.IsStdout)
    93  
    94  			err = session.Wait()
    95  			if err != nil {
    96  				return fmt.Errorf("failed to execute command(%s) on host(%s): error(%v)", cmd, host, err)
    97  			}
    98  
    99  			return nil
   100  		}
   101  	}
   102  
   103  	for _, cmd := range cmds {
   104  		if cmd == "" {
   105  			continue
   106  		}
   107  		if s.User != common.ROOT {
   108  			cmd = SUDO + cmd
   109  		}
   110  		if err := execFunc(cmd); err != nil {
   111  			return err
   112  		}
   113  	}
   114  
   115  	return nil
   116  }
   117  
   118  func (s *SSH) Cmd(host, cmd string) ([]byte, error) {
   119  	if s.User != common.ROOT {
   120  		cmd = SUDO + cmd
   121  	}
   122  	if utils.IsLocalIP(host, s.LocalAddress) {
   123  		return exec.Command("/bin/sh", "-c", cmd).CombinedOutput()
   124  	}
   125  
   126  	client, session, err := s.Connect(host)
   127  	if err != nil {
   128  		return nil, fmt.Errorf("[ssh][%s] create ssh session failed, %s", host, err)
   129  	}
   130  	defer client.Close()
   131  	defer session.Close()
   132  	b, err := session.CombinedOutput(cmd)
   133  	if err != nil {
   134  		return b, fmt.Errorf("[ssh][%s]run command failed [%s]", host, cmd)
   135  	}
   136  
   137  	return b, nil
   138  }
   139  
   140  //CmdToString is in host exec cmd and replace to spilt str
   141  func (s *SSH) CmdToString(host, cmd, split string) (string, error) {
   142  	data, err := s.Cmd(host, cmd)
   143  	str := string(data)
   144  	if err != nil {
   145  		return str, fmt.Errorf("exec command failed %s %s %v", host, cmd, err)
   146  	}
   147  	if data != nil {
   148  		str = strings.ReplaceAll(str, "\r\n", split)
   149  		str = strings.ReplaceAll(str, "\n", split)
   150  		return str, nil
   151  	}
   152  	return str, fmt.Errorf("command %s %s return nil", host, cmd)
   153  }