通过crontab执行Python脚本

  • Z时代
  • 2024-01-10
  • 分类：问答

我正在尝试使用Linux crontab执行python脚本" title="python脚本">python脚本。我想每10分钟运行一次此脚本。

我找到了很多解决方案，但都无济于事。例如：在/etc/cron.d中编辑anacron或使用crontab

-e。我将此行放在文件的末尾，但它没有任何改变。我需要重启任何服务吗？

*/2 * * * * /usr/bin/python /home/souza/Documets/Listener/listener.py

我必须编辑哪个文件来配置它？

提前致谢

这是脚本。

#!/usr/bin/python
# -*- coding: iso-8859-15 -*-
import json
import os
import pycurl
import sys
import cStringIO
if __name__ == "__main__":
    name_server_standart = "Server created by script %d"
    json_file_standart = "{ \"server\" : {  \"name\" : \"%s\", \"imageRef\" : \"%s\", \"flavorRef\" : \"%s\" } }"
    curl_auth_token = pycurl.Curl()
    gettoken = cStringIO.StringIO()
    curl_auth_token.setopt(pycurl.URL, "http://192.168.100.241:8774/v1.1")
    curl_auth_token.setopt(pycurl.POST, 1)
    curl_auth_token.setopt(pycurl.HTTPHEADER, ["X-Auth-User: cpca", 
                          "X-Auth-Key: 438ac2d9-689f-4c50-9d00-c2883cfd38d0"])
    curl_auth_token.setopt(pycurl.HEADERFUNCTION, gettoken.write)
    curl_auth_token.perform()
    chg = gettoken.getvalue()
    auth_token = chg[chg.find("X-Auth-Token: ")+len("X-Auth-Token: ") : chg.find("X-Server-Management-Url:")-1]
    token = "X-Auth-Token: {0}".format(auth_token)
    curl_auth_token.close()
    #----------------------------
    getter = cStringIO.StringIO()
    curl_hab_image = pycurl.Curl()
    curl_hab_image.setopt(pycurl.URL, "http://192.168.100.241:8774/v1.1/nuvemcpca/images/7")
    curl_hab_image.setopt(pycurl.HTTPGET, 1) #tirei essa linha e funcionou, nao sei porque
    curl_hab_image.setopt(pycurl.HTTPHEADER, [token])
    curl_hab_image.setopt(pycurl.WRITEFUNCTION, getter.write)
    #curl_list.setopt(pycurl.VERBOSE, 1)
    curl_hab_image.perform()
    curl_hab_image.close()
    getter = cStringIO.StringIO()
    curl_list = pycurl.Curl()
    curl_list.setopt(pycurl.URL, "http://192.168.100.241:8774/v1.1/nuvemcpca/servers/detail")
    curl_list.setopt(pycurl.HTTPGET, 1) #tirei essa linha e funcionou, nao sei porque
    curl_list.setopt(pycurl.HTTPHEADER, [token])
    curl_list.setopt(pycurl.WRITEFUNCTION, getter.write)
    #curl_list.setopt(pycurl.VERBOSE, 1)
    curl_list.perform()
    curl_list.close()
    #----------------------------
    resp = getter.getvalue()
    con = int(resp.count("status"))
    s = json.loads(resp)
    lst = []
    for i in range(con):
        lst.append(s['servers'][i]['status'])
    for j in range(len(lst)):
        actual = lst.pop()
        print actual
        if actual != "ACTIVE" and actual != "BUILD" and actual != "REBOOT" and actual != "RESIZE":
            print "Entra no If"
            f = file('counter', 'r+w')
            num = 0
            for line in f:
                num = line
            content = int(num)+1
            ins = str(content)
            f.seek(0)
            f.write(ins)
            f.truncate()
            f.close()
            print "Contador"
            json_file = file('json_file_create_server.json','r+w')
            name_server_final = name_server_standart % content
            path_to_image = "http://192.168.100.241:8774/v1.1/nuvemcpca/images/7"
            path_to_flavor = "http://192.168.100.241:8774/v1.1/nuvemcpca/flavors/1"
            new_json_file_content = json_file_standart % (name_server_final, path_to_image, path_to_flavor)
            json_file.seek(0)
            json_file.write(new_json_file_content)
            json_file.truncate()
            json_file.close()
            print "Json File"
            fil = file("json_file_create_server.json")
            siz = os.path.getsize("json_file_create_server.json")
            cont_size = "Content-Length: %d" % siz
            cont_type = "Content-Type: application/json"
            accept = "Accept: application/json"
            c_create_servers = pycurl.Curl()
            logger = cStringIO.StringIO()
            c_create_servers.setopt(pycurl.URL, "http://192.168.100.241:8774/v1.1/nuvemcpca/servers")
            c_create_servers.setopt(pycurl.HTTPHEADER, [token, cont_type, accept, cont_size])
            c_create_servers.setopt(pycurl.POST, 1)
            c_create_servers.setopt(pycurl.INFILE, fil)
            c_create_servers.setopt(pycurl.INFILESIZE, siz)
            c_create_servers.setopt(pycurl.WRITEFUNCTION, logger.write)
            print "Teste perform"
            c_create_servers.perform()
            print logger.getvalue()
            c_create_servers.close()

回答：

只需使用crontab -e并按照此处的教程操作即可。

请参阅第3点，以获取有关如何指定频率的指南。

根据您的要求，它应该有效地是：

*/10 * * * * /usr/bin/python script.py

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