Question

将脚本运行到ssh并返回iostat错误时，

solaris_command = "iostat -en | awk 'NR>=3 && $4 > 0' | while read a b c d e; do echo $e,$a,$b,$c,$d; done"

for line in server_list:
    line_arr = line.split(',')
    if line_arr[0] == 'SunOS':
        ie = subprocess.Popen(["ssh", "%s" % (line_arr[2]), "hostname"], shell=False, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    output = ie.communicate()

服务器列表的值为SunOS,4,xxx.xxx.xxx.xxx,sunhost5...

返回错误，

Traceback (most recent call last):
  File "./iostat_err_check.py", line 59, in <module>
    output = ie.communicate()
NameError: name 'ie' is not defined

我不确定为什么变量没有被初始化，所以我可以使用。

奇怪的是它适用于我正在做的另一项检查

linux_command = """df -Ph | awk 'NR>=2' | while read a b C d e f; do echo $f, $e, $d; done"""
Solaris_command = """df -h | awk 'NR>=2' | while read a b C d e f; do echo $f, $e, $d; done"""

for line in server_list:
    line_arr = line.split(',')
    # No ssh for Daily Checks host
    if line_arr[2] == 'xxx.xxx.xxx.xxx':
        df = subprocess.Popen(linux_command, stdout=subprocess.PIPE, stderr=None, shell=True)
    elif line_arr[0] == 'Linux':
        df = subprocess.Popen(["ssh", "%s" % (line_arr[2]), linux_command], shell=False, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    elif line_arr[0] == 'SunOS':
        df = subprocess.Popen(["ssh", "%s" % (line_arr[2]), solaris_command], shell=False, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    output = df.communicate()
    output = (output[0].splitlines())
    for mount in output:
        data = ("%s,%s,%s,%s\n") % (date_code, line_arr[3], line_arr[2], mount)
        data_file.write(data)
    servers_processed += 1

正在初始化Df并且可以使用。

Answer 1

您正在关注subprocess.Popen()来电：

if line_arr[0] == 'SunOS':
    ie = subprocess.Popen(["ssh", "%s" % (line_arr[2]), "hostname"], shell=False, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

但 next 行始终执行：

output = ie.communicate()

ie仅在if测试匹配时定义，因此您需要缩进 ie.communicate()行才能在您实际创建{Popen()时执行1}}对象。

Python子进程输出变量错误;变量未定义

1 个答案: