Question

我无法通过ssh以编程方式运行本地脚本我不确定这是否是本地主机上shell变量替换的问题。

手动运行时，

ssh monit@server1 'bash -s' < /u02/splunk/splunk/etc/apps/Splunk_TA_nix/bin/cpu.sh

我得到了预期的输出，

CPU pctUser pctNice pctSystem pctIowait pctIdle
  全部11.21 0.00 1.50 0.31 86.98
  0 0.00 0.00 0.00 0.00 100.00
  1 3.00 0.00 1.00 0.00 96.00   ....

但我得到

bash：/u02/splunk/splunk/etc/apps/Splunk_TA_nix/bin/cpu.sh：没有这样的文件或目录

运行以下代码时，

splunk_bin_dir = '/u02/splunk/splunk/etc/apps/Splunk_TA_nix/bin'
hostname = 'server1'
username = 'monit'
password = 'monit#_'


command = "/usr/bin/ssh %(username)s@%(hostname)s 'bash -s' < %(splunk_bin_dir)s/cpu.sh" % locals()
print command

ssh_new_conn = 'Are you sure you want to continue connecting'

p = pexpect.spawn(command, timeout=360)
# Handles the 3 possible connection outcomes:
# a) Ssh to the remote host for the first time, triggering 'Are you sure you want to continue connecting'
# b) ask you for password
# c) No password is needed at all, because you already have the key.
i = p.expect([ssh_new_conn,'[pP]assword:',pexpect.EOF])
print ' Initial pexpect command output: ', i
if i == 0:
    # send 'yes'
    p.sendline('yes')
    i = p.expect(['[pP]assword:',pexpect.EOF])
    print 'sent yes. pexpect command output', i
    if i == 0:
        # send the password
        p.sendline(password)
        p.expect(pexpect.EOF)
elif i == 1:
    # send the password
    p.sendline(password)
    p.expect(pexpect.EOF)
elif i == 2:
    print "pexpect faced key or connection timeout"
    pass

print p.before

这些是打印输出，

/ usr / bin / ssh monit @ server1＆＃39; bash -s＆＃39; ＆LT; /u02/splunk/splunk/etc/apps/Splunk_TA_nix/bin/cpu.sh
  初始pexpect命令输出：1
  bash：/u02/splunk/splunk/etc/apps/Splunk_TA_nix/bin/cpu.sh：没有这样的文件或目录

pexpect正在进入[pP] assword行，所以我猜密码正确传递，

Answer 1

这是pexpect手册中的注释：

请记住，Pexpect不会解释shell元字符，例如重定向，管道或外卡（＆gt;，|或*）。这是一个常见的错误。如果要运行命令并通过另一个命令管道它你也必须开始一个shell。

这是工作线

command = """/bin/bash -c "/usr/bin/ssh  %(username)s@%(hostname)s 'bash -s' < %(splunk_bin_dir)s/cpu.sh" """ % locals()

pexpect - 在ssh上运行script.sh

1 个答案: