Question

我正在尝试自动化安装docker-engine的过程，然后询问用户是否要提取rhel / suse / centos图像。

使用python是我的第一个想法，但我添加了bash脚本以使事情变得更容易，python似乎不太友好，无法运行cli命令。

现在，我计划扩展功能，而shell脚本无法扩展。如何将此脚本转换为python？如果不使用额外的python导入，许多常见的命令行操作（如＆＃34; yum install＆＃34;等）都不容易。

如果您有任何更简单的建议，请咨询

谢谢！

这是bash脚本仍在开发中......

#!/bin/sh

if [ "$(id -u)" != "0" ]; then
    echo "This script must be run as root" 1>&2
    exit 1
fi

echo
echo " - Installing packages"
echo

if [[ -e /usr/bin/yum ]]; then
    #Verify packages are up to date
    yum update
    #Install Docker
    yum install docker-engine
else
    echo "No yum, lets try apt-get"
    sudo apt-get update
    #sudo apt-get -y upgrade
    #sudo apt-get install linux-image-extra-`uname -r`
    #sudo apt-get install docker-engine
fi

if [ $? -eq 0 ]; then
  echo success
else
  echo failed
  exit
fi

#start Docker
echo "Would you like to start Docker and pull Images? Select 1 or 2"
select y1 in "Yes" "No"; do
    case $y1 in
        Yes ) service docker start; docker pull "rhel:7.2" ;docker pull "mstormo/suse" ;break;;
        No ) exit;;
    esac



echo " - Complete!"
echo

done

Answer 1

好的，所以我能够在Python中使用它。我会在这里留下代码，万一有人需要它。

干杯！罗希特夏尔

from subprocess import Popen, PIPE

uid = Popen(['id', '-u'], stdin=PIPE, stdout=PIPE, stderr=PIPE)
uid_get = uid.stdout.read(1)
if uid_get !=  '0':
    print "This script needs to be run as root"

print " - Installing packages "

check1 = Popen(['/usr/bin/yum'], stdin=PIPE, stdout=PIPE, stderr=PIPE)
check_yum = check1.stdout.read()
if check_yum == ' ':
    print "Yum is not found, trying apt-get"
    proc = Popen('apt-get update', shell=True, stdin=None, executable="/bin/bash")
    proc.wait()
    proc = Popen('apt-get upgrade', shell=True, stdin=None, executable="/bin/bash")
    proc.wait()
    proc = Popen('apt-get install', shell=True, stdin=None, executable="/bin/bash")
    proc.wait()
    proc = Popen('apt-get install docker-engine', shell=True, stdin=None, executable="/bin/bash")
    proc.wait()
else:
    print "Running yum install"
    proc = Popen('yum update', shell=True, stdin=None, executable="/bin/bash")
    proc.wait()
    proc = Popen('yum install docker-engine', shell=True, stdin=None, executable="/bin/bash")
    proc.wait()

print "Would you like to start Docker and pull images - RHEL and SUSE? -> y or n ?"
y="yes"
n="no"
choice = raw_input().lower()
if choice in y:
    print "Pulling RHEL and SUSE images"
    proc = Popen('service docker start; docker pull "rhel:7.2" ;docker pull "mstormo/suse" ; docker run rhel sh -c "cat /etc/*release"; docker run "mstormo/suse" sh -c "cat /etc/*release"', shell=True, stdin=None, executable="/bin/bash")
        proc.wait()
elif choice in n:
    print "Thank you, exiting...."
else:
print " Invalid selection"


print " - Complete! "

Answer 2

我建议尝试使用sh模块：

from sh import docker
for line in docker('build', '-t', some_tag, '.', _iter=True):
    sys.stdout.write(str(line))

这是一个长时间运行的命令，因此很好地显示其输出逐行。这就是for loop和_iter的作用。

使用python或bash自动安装Docker和图像拉

2 个答案: