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

     1  // Copyright © 2022 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  	"bufio"
    19  	"fmt"
    20  	"strings"
    21  
    22  	"github.com/alibaba/sealer/utils"
    23  
    24  	"github.com/alibaba/sealer/logger"
    25  	v1 "github.com/alibaba/sealer/types/api/v1"
    26  	"github.com/alibaba/sealer/utils/platform"
    27  	"github.com/pkg/errors"
    28  )
    29  
    30  func (s *SSH) Platform(host string) (v1.Platform, error) {
    31  	if utils.IsLocalIP(host, s.LocalAddress) {
    32  		return *platform.GetDefaultPlatform(), nil
    33  	}
    34  
    35  	p := v1.Platform{}
    36  	archResult, err := s.CmdToString(host, "uname -m", "")
    37  	if err != nil {
    38  		return p, err
    39  	}
    40  	osResult, err := s.CmdToString(host, "uname", "")
    41  	if err != nil {
    42  		return p, err
    43  	}
    44  	p.OS = strings.ToLower(strings.TrimSpace(osResult))
    45  	switch strings.ToLower(strings.TrimSpace(archResult)) {
    46  	case "x86_64":
    47  		p.Architecture = platform.AMD
    48  	case "aarch64":
    49  		p.Architecture = platform.ARM64
    50  	case "armv7l":
    51  		p.Architecture = "arm-v7"
    52  	case "armv6l":
    53  		p.Architecture = "arm-v6"
    54  	default:
    55  		return p, fmt.Errorf("unrecognized architecture：%s", archResult)
    56  	}
    57  	if p.Architecture != platform.AMD {
    58  		p.Variant, err = s.getCPUVariant(p.OS, p.Architecture, host)
    59  		if err != nil {
    60  			return p, err
    61  		}
    62  	}
    63  	remotePlatform, err := platform.Parse(platform.Format(p))
    64  	if err != nil {
    65  		return p, err
    66  	}
    67  	return platform.Normalize(remotePlatform), nil
    68  }
    69  
    70  func (s *SSH) getCPUInfo(host, pattern string) (info string, err error) {
    71  	sshClient, sftpClient, err := s.sftpConnect(host)
    72  	if err != nil {
    73  		return "", fmt.Errorf("new sftp client failed %v", err)
    74  	}
    75  	defer func() {
    76  		_ = sftpClient.Close()
    77  		_ = sshClient.Close()
    78  	}()
    79  	// open remote source file
    80  	srcFile, err := sftpClient.Open("/proc/cpuinfo")
    81  	if err != nil {
    82  		return "", fmt.Errorf("open /proc/cpuinfo file failed %v", err)
    83  	}
    84  	defer func() {
    85  		if err := srcFile.Close(); err != nil {
    86  			logger.Warn("failed to close file: %v", err)
    87  		}
    88  	}()
    89  	scanner := bufio.NewScanner(srcFile)
    90  	for scanner.Scan() {
    91  		newline := scanner.Text()
    92  		list := strings.Split(newline, ":")
    93  
    94  		if len(list) > 1 && strings.EqualFold(strings.TrimSpace(list[0]), pattern) {
    95  			return strings.TrimSpace(list[1]), nil
    96  		}
    97  	}
    98  	// Check whether the scanner encountered errors
    99  	err = scanner.Err()
   100  	if err != nil {
   101  		return "", err
   102  	}
   103  	return "", errors.Wrapf(platform.ErrNotFound, "getCPUInfo for pattern: %s", pattern)
   104  }
   105  
   106  func (s *SSH) getCPUVariant(os, arch, host string) (string, error) {
   107  	variant, err := s.getCPUInfo(host, "Cpu architecture")
   108  	if err != nil {
   109  		return "", err
   110  	}
   111  	model, err := s.getCPUInfo(host, "model name")
   112  	if err != nil {
   113  		if !strings.Contains(err.Error(), platform.ErrNotFound.Error()) {
   114  			return "", err
   115  		}
   116  	}
   117  	variant, model = platform.NormalizeArch(variant, model)
   118  	return platform.GetCPUVariantByInfo(os, arch, variant, model), nil
   119  }