Amazon ec2 certbot SERVFAIL查找域失败

我使用certbot为一个域生成证书，第一次它工作得很好。 之后，我将我的AmazonEC2实例（AmazonLinux）更改为另一个区域。因此，我更改了子域的A记录，现在由于DNS问题，我无法在新实例上生成证书

certbot auto certly--debug--standalone-d dev.*******.com

2016-07-19 17:03:29,603:DEBUG:certbot.main:Root logging level set at 30
2016-07-19 17:03:29,604:INFO:certbot.main:Saving debug log to /var/log/letsencrypt/letsencrypt.log
2016-07-19 17:03:29,604:DEBUG:certbot.main:certbot version: 0.8.1
2016-07-19 17:03:29,604:DEBUG:certbot.main:Arguments: ['--debug', '--standalone', '-d', 'dev.********.com']
2016-07-19 17:03:29,605:DEBUG:certbot.main:Discovered plugins: PluginsRegistry(PluginEntryPoint#apache,PluginEntryPoint#webroot,PluginEntryPoint#null,PluginEntryPoint#manual,PluginEntryPoint#standalone)
2016-07-19 17:03:29,609:DEBUG:certbot.plugins.selection:Requested authenticator standalone and installer None
2016-07-19 17:03:29,804:DEBUG:certbot.plugins.selection:Single candidate plugin: * standalone
Description: Automatically use a temporary webserver
Interfaces: IAuthenticator, IPlugin
Entry point: standalone = certbot.plugins.standalone:Authenticator
Initialized: <certbot.plugins.standalone.Authenticator object at 0x7f0133b10d10>
Prep: True
2016-07-19 17:03:29,806:DEBUG:certbot.plugins.selection:Selected authenticator <certbot.plugins.standalone.Authenticator object at 0x7f0133b10d10> and installer None
2016-07-19 17:03:29,942:DEBUG:certbot.main:Picked account: <Account(388bf562a96cea8013b7660447da660e)>
2016-07-19 17:03:29,943:DEBUG:root:Sending GET request to https://acme-v01.api.letsencrypt.org/directory. args: (), kwargs: {}
2016-07-19 17:03:29,946:INFO:requests.packages.urllib3.connectionpool:Starting new HTTPS connection (1): acme-v01.api.letsencrypt.org
2016-07-19 17:03:30,132:DEBUG:requests.packages.urllib3.connectionpool:"GET /directory HTTP/1.1" 200 280
2016-07-19 17:03:30,133:DEBUG:root:Received <Response [200]>. Headers: {'Content-Length': '280', 'Expires': 'Tue, 19 Jul 2016 17:03:30 GMT', 'Boulder-Request-Id': 'A4t6LE9szTZDv0FuCE7bQnICx2zyVtRVeQacSWenKUE', 'Strict-Transport-Security': 'max-age=604800', 'Server': 'nginx', 'Connection': 'keep-alive', 'Pragma': 'no-cache', 'Cache-Control': 'max-age=0, no-cache, no-store', 'Date': 'Tue, 19 Jul 2016 17:03:30 GMT', 'X-Frame-Options': 'DENY', 'Content-Type': 'application/json', 'Replay-Nonce': 'VLinxcmE9YznBxpdisr5YqFQqf9KFT3grGMLfwvD3Jg'}. Content: '{\n  "new-authz": "https://acme-v01.api.letsencrypt.org/acme/new-authz",\n  "new-cert": "https://acme-v01.api.letsencrypt.org/acme/new-cert",\n  "new-reg": "https://acme-v01.api.letsencrypt.org/acme/new-reg",\n  "revoke-cert": "https://acme-v01.api.letsencrypt.org/acme/revoke-cert"\n}'
2016-07-19 17:03:30,133:DEBUG:acme.client:Received response <Response [200]> (headers: {'Content-Length': '280', 'Expires': 'Tue, 19 Jul 2016 17:03:30 GMT', 'Boulder-Request-Id': 'A4t6LE9szTZDv0FuCE7bQnICx2zyVtRVeQacSWenKUE', 'Strict-Transport-Security': 'max-age=604800', 'Server': 'nginx', 'Connection': 'keep-alive', 'Pragma': 'no-cache', 'Cache-Control': 'max-age=0, no-cache, no-store', 'Date': 'Tue, 19 Jul 2016 17:03:30 GMT', 'X-Frame-Options': 'DENY', 'Content-Type': 'application/json', 'Replay-Nonce': 'VLinxcmE9YznBxpdisr5YqFQqf9KFT3grGMLfwvD3Jg'}): '{\n  "new-authz": "https://acme-v01.api.letsencrypt.org/acme/new-authz",\n  "new-cert": "https://acme-v01.api.letsencrypt.org/acme/new-cert",\n  "new-reg": "https://acme-v01.api.letsencrypt.org/acme/new-reg",\n  "revoke-cert": "https://acme-v01.api.letsencrypt.org/acme/revoke-cert"\n}'
2016-07-19 17:03:30,134:DEBUG:root:Requesting fresh nonce
2016-07-19 17:03:30,134:DEBUG:root:Sending HEAD request to https://acme-v01.api.letsencrypt.org/acme/new-authz. args: (), kwargs: {}
2016-07-19 17:03:30,327:DEBUG:requests.packages.urllib3.connectionpool:"HEAD /acme/new-authz HTTP/1.1" 405 0
2016-07-19 17:03:30,328:DEBUG:root:Received <Response [405]>. Headers: {'Content-Length': '91', 'Pragma': 'no-cache', 'Boulder-Request-Id': 'zZzFamjI7WOmh85keAw4lLd8laZfe74W1TYq3HNR7mk', 'Expires': 'Tue, 19 Jul 2016         17:03:30 GMT', 'Server': 'nginx', 'Connection': 'keep-alive', 'Allow': 'POST', 'Cache-Control': 'max-age=0, no-cache, no-store', 'Date': 'Tue, 19 Jul 2016 17:03:30 GMT', 'Content-Type': 'application/problem+json', 'Replay-Nonce': 'CgmdRQWWj5_PPfveAA7c1o50xkOk3entsaA27xlBwmA'}. Content: ''
2016-07-19 17:03:30,328:DEBUG:acme.client:Storing nonce: '\n\t\x9dE\x05\x96\x8f\x9f\xcf=\xfb\xde\x00\x0e\xdc\xd6\x8et\xc6C\xa4\xdd\xe9\xed\xb1\xa06\xef\x19A\xc2`'
2016-07-19 17:03:30,328:DEBUG:acme.jose.json_util:Omitted empty fields: combinations=None, challenges=None, expires=None, status=None
2016-07-19 17:03:30,329:DEBUG:acme.client:Serialized JSON: {"identifier": {"type": "dns", "value": "xxxxxxxxxxxxx.com"}, "resource": "new-authz"}
2016-07-19 17:03:30,330:DEBUG:acme.jose.json_util:Omitted empty fields: kid=None, x5c=(), crit=(), jwk=None, typ=None, jku=None, cty=None, x5tS256=None, x5u=None, alg=None, x5t=None
2016-07-19 17:03:30,332:DEBUG:acme.jose.json_util:Omitted empty fields: kid=None, x5c=(), crit=(), typ=None, jku=None, cty=None, x5tS256=None, x5u=None, x5t=None, nonce=None
2016-07-19 17:03:30,332:DEBUG:root:Sending POST request to https://acme-v01.api.letsencrypt.org/acme/new-authz. args: (), kwargs: {'data': '{"header": {"alg": "RS256", "jwk": {"e": "AQAB", "kty": "RSA", "n": "rKDIxM9XKqEZ69kyTl7L6l1OZuEaJRJdSje2z4VC8pJt0sxRJXu32BVy5zC7uKLDmj-pUxcR2N5zAZTD4hJC-CwavEp9IT4zsQacQK1E9aGQOewmAF54_qUJQrZal167BOmMIENKcQ-sbVz1OLAhz85oByCAXwW6T8v5qoXCPYIX7pmgp4IuI4WNBcWeBqFv3Joj78oSReZXCuJId8RqsP5DeYRNpetvqUHijj3JGiQnclnUW2iTRUuiilAkqswDqk4J4uAraLylprTt2iQYA4wLZDaC2Con_u3c62aLpYpK5J2D5ZVoGJANjAzzNfkQAhsun3h3LsXLgfZ0Z2n2aw"}}, "protected": "eyJub25jZSI6ICJDZ21kUlFXV2o1X1BQZnZlQUE3YzFvNTB4a09rM2VudHNhQTI3eGxCd21BIn0", "payload": "eyJpZGVudGlmaWVyIjogeyJ0eXBlIjogImRucyIsICJ2YWx1ZSI6ICJkZXYuZGlhZ25ldHdvcmsuY29tIn0sICJyZXNvdXJjZSI6ICJuZXctYXV0aHoifQ", "signature": "lQjyTE1QljLHo1CxV6T94yrPb76ruaGDNd5ZthPI-9-rUDULu8VnCVHqO0v2ZYlfKlZUza80U6-ZFRmw4lGFaB1gK0w_jV7ONIg0dzjkTu8NEdKZ6PcMUuRdZuCbwsln9coIjy_7f5tQ7ukzSbQJXEbz6MTQ-5UALr5ft_JkSLTifwJFGtejzveY3KrpeP4WaI-hGzwLLOxjnFh_tn3Z2NdOqrTWJzGn_rqvlwX0OlG-GvcV6k9a9eK9aSK4T13Vs0N5ZYqX1IbVNHcqbgvoJ50LVUYlWWTDsihrZ4ttQl_onpmy5jRDKuQSeS8B3hVRKhgdmOh4fI9OYLjpd13Ddg"}'}
2016-07-19 17:03:30,629:DEBUG:requests.packages.urllib3.connectionpool:"POST /acme/new-authz HTTP/1.1" 201 1004
2016-07-19 17:03:30,629:DEBUG:root:Received <Response [201]>. Headers: {'Content-Length': '1004', 'Expires': 'Tue, 19 Jul 2016 17:03:30 GMT', 'Boulder-Request-Id': 'PknRp_fwf5o0vaHUpy_53-SwSKCN0Qwk0kBnm15EexI', 'Strict-Transport-Security': 'max-age=604800', 'Server': 'nginx', 'Cache-Control': 'max-age=0, no-cache, no-store', 'Connection': 'keep-alive', 'Link': '<https://acme-v01.api.letsencrypt.org/acme/new-cert>;rel="next"', 'Location': 'https://acme-v01.api.letsencrypt.org/acme/authz/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0', 'Pragma': 'no-cache', 'Boulder-Requester': '2692481', 'Date': 'Tue, 19 Jul 2016 17:03:30 GMT', 'X-Frame-Options': 'DENY', 'Content-Type': 'application/json', 'Replay-Nonce': 'B_6L7ZtDh3CzsQtRO_e8vceSEcbZGihWBGntNZ6h_G0'}. Content: '{\n  "identifier": {\n    "type": "dns",\n    "value": "xxxxxxxxxxxxxxx.com"\n  },\n  "status": "pending",\n  "expires": "2016-07-26T17:03:30.455575285Z",\n  "challenges": [\n    {\n      "type": "dns-01",\n      "status": "pending",\n      "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466859",\n      "token": "6Z6vCV4zSvxn5U6WxpUcf2imTMT5kLj7rbRN5fmF9GI"\n    },\n    {\n      "type": "tls-sni-01",\n      "status": "pending",\n      "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466860",\n      "token": "bZjyeq34-f_T4bUcy1DVhPbnv_CanSu1c5PUezrhjqI"\n    },\n    {\n      "type": "http-01",\n      "status": "pending",\n      "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466861",\n      "token": "G581_pOSgF203q69BWk8tmHt1YH8lMLAidtBBQ90vnQ"\n    }\n  ],\n  "combinations": [\n    [\n      0\n    ],\n    [\n      2\n    ],\n    [\n      1\n    ]\n  ]\n}'
2016-07-19 17:03:30,629:DEBUG:acme.client:Storing nonce: '\x07\xfe\x8b\xed\x9bC\x87p\xb3\xb1\x0bQ;\xf7\xbc\xbd\xc7\x92\x11\xc6\xd9\x1a(V\x04i\xed5\x9e\xa1\xfcm'
2016-07-19 17:03:30,630:DEBUG:acme.client:Received response <Response [201]> (headers: {'Content-Length': '1004', 'Expires': 'Tue, 19 Jul 2016 17:03:30 GMT', 'Boulder-Request-Id': 'PknRp_fwf5o0vaHUpy_53-SwSKCN0Qwk0kBnm15EexI', 'Strict-Transport-Security': 'max-age=604800', 'Server': 'nginx', 'Cache-Control': 'max-age=0, no-cache, no-store', 'Connection': 'keep-alive', 'Link': '<https://acme-v01.api.letsencrypt.org/acme/new-cert>;rel="next"', 'Location': 'https://acme-v01.api.letsencrypt.org/acme/authz/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0', 'Pragma': 'no-cache', 'Boulder-Requester': '2692481', 'Date': 'Tue, 19 Jul 2016 17:03:30 GMT', 'X-Frame-Options': 'DENY', 'Content-Type': 'application/json', 'Replay-Nonce': 'B_6L7ZtDh3CzsQtRO_e8vceSEcbZGihWBGntNZ6h_G0'}): '{\n  "identifier": {\n    "type": "dns",\n    "value": "xxxxxxxxxxxxxxxxxxxx.com"\n  },\n  "status": "pending",\n  "expires": "2016-07-26T17:03:30.455575285Z",\n  "challenges": [\n    {\n      "type": "dns-01",\n      "status": "pending",\n      "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466859",\n      "token": "6Z6vCV4zSvxn5U6WxpUcf2imTMT5kLj7rbRN5fmF9GI"\n    },\n    {\n      "type": "tls-sni-01",\n      "status": "pending",\n      "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466860",\n      "token": "bZjyeq34-f_T4bUcy1DVhPbnv_CanSu1c5PUezrhjqI"\n    },\n    {\n      "type": "http-01",\n      "status": "pending",\n      "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466861",\n      "token": "G581_pOSgF203q69BWk8tmHt1YH8lMLAidtBBQ90vnQ"\n    }\n  ],\n  "combinations": [\n    [\n      0\n    ],\n    [\n      2\n    ],\n    [\n      1\n    ]\n  ]\n}'
2016-07-19 17:03:30,630:DEBUG:acme.challenges:dns-01 was not recognized, full message: {u'status': u'pending', u'token': u'6Z6vCV4zSvxn5U6WxpUcf2imTMT5kLj7rbRN5fmF9GI', u'type': u'dns-01', u'uri': u'https://acme-v01.api.letsencrypt.org/acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466859'}
2016-07-19 17:03:30,630:INFO:certbot.auth_handler:Performing the following challenges:
2016-07-19 17:03:30,631:INFO:certbot.auth_handler:tls-sni-01 challenge for xxxxxxxxxxxxxxxxxxxx.com
2016-07-19 17:03:30,643:INFO:certbot.auth_handler:Waiting for verification...
2016-07-19 17:03:30,643:DEBUG:acme.client:Serialized JSON: {"keyAuthorization": "bZjyeq34-f_T4bUcy1DVhPbnv_CanSu1c5PUezrhjqI.B7zuU4v6Umg0TGs8jOHl_ihptyLw9pPsE1dRzUZoOu0", "type": "tls-sni-01", "resource": "challenge"}

2016-07-19 17:03:30,644:DEBUG:acme.jose.json_util:Omitted empty fields: kid=None, x5c=(), crit=(), jwk=None, typ=None, jku=None, cty=None, x5tS256=None, x5u=None, alg=None, x5t=None
2016-07-19 17:03:30,646:DEBUG:acme.jose.json_util:Omitted empty fields: kid=None, x5c=(), crit=(), typ=None, jku=None, cty=None, x5tS256=None, x5u=None, x5t=None, nonce=None
2016-07-19 17:03:30,646:DEBUG:root:Sending POST request to https://acme-v01.api.letsencrypt.org/acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466860. args: (), kwargs: {'data': '{"header": {"alg": "RS256", "jwk": {"e": "AQAB", "kty": "RSA", "n": "rKDIxM9XKqEZ69kyTl7L6l1OZuEaJRJdSje2z4VC8pJt0sxRJXu32BVy5zC7uKLDmj-pUxcR2N5zAZTD4hJC-CwavEp9IT4zsQacQK1E9aGQOewmAF54_qUJQrZal167BOmMIENKcQ-sbVz1OLAhz85oByCAXwW6T8v5qoXCPYIX7pmgp4IuI4WNBcWeBqFv3Joj78oSReZXCuJId8RqsP5DeYRNpetvqUHijj3JGiQnclnUW2iTRUuiilAkqswDqk4J4uAraLylprTt2iQYA4wLZDaC2Con_u3c62aLpYpK5J2D5ZVoGJANjAzzNfkQAhsun3h3LsXLgfZ0Z2n2aw"}}, "protected": "eyJub25jZSI6ICJCXzZMN1p0RGgzQ3pzUXRST19lOHZjZVNFY2JaR2loV0JHbnROWjZoX0cwIn0", "payload": "eyJrZXlBdXRob3JpemF0aW9uIjogImJaanllcTM0LWZfVDRiVWN5MURWaFBibnZfQ2FuU3UxYzVQVWV6cmhqcUkuQjd6dVU0djZVbWcwVEdzOGpPSGxfaWhwdHlMdzlwUHNFMWRSelVab091MCIsICJ0eXBlIjogInRscy1zbmktMDEiLCAicmVzb3VyY2UiOiAiY2hhbGxlbmdlIn0", "signature": "kZkv-CFLZH31z3kZ1naF7g41XcslUbVBPH42wptZzlov3_rWom-N8appf_eaLQ2P7lMVE89-gyM7fHmoWHl0Gpmkk4Xgmer9L4QdQyVixn60mm-1q6QMsWXT35e7Z7zokfUsOYkXQiEImIwZ0sxBc59dzxGIX7LhDFePZfyeZvH4_P0nUgpCgRqqXTni-O32stAM0i00GxLdg0kikc3UVD09iCU6sUpKpXc3kQHNLlkIkfiNN6zAngBnWDAgSMhquYKas2kk0hxnJw1UguyY9Ieu8Kd6vExi3U-yjGVOL2hVP3LkU46GS8eqvphC1mlndILGM-3VD1UYtwNAIsQt_A"}'}
2016-07-19 17:03:30,902:DEBUG:requests.packages.urllib3.connectionpool:"POST /acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466860 HTTP/1.1" 202 338
2016-07-19 17:03:30,902:DEBUG:root:Received <Response [202]>. Headers: {'Content-Length': '338', 'Boulder-Request-Id': 'qq5g3DMMDllSKoWuHRIRSY5oy9RNvpHZ9uF_zzYEeuk', 'Expires': 'Tue, 19 Jul 2016 17:03:30 GMT', 'Server': 'nginx', 'Cache-Control': 'max-age=0, no-cache, no-store', 'Connection': 'keep-alive', 'Link': '<https://acme-v01.api.letsencrypt.org/acme/authz/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0>;rel="up"', 'Location': 'https://acme-v01.api.letsencrypt.org/acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466860', 'Pragma': 'no-cache', 'Boulder-Requester': '2692481', 'Date': 'Tue, 19 Jul 2016 17:03:30 GMT', 'Content-Type': 'application/json', 'Replay-Nonce': 'VHPW9aR8jmuShp8pFrFuxFiQapbdip6SYQNzBaC-b7Y'}. Content: '{\n  "type": "tls-sni-01",\n  "status": "pending",\n  "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466860",\n  "token": "bZjyeq34-f_T4bUcy1DVhPbnv_CanSu1c5PUezrhjqI",\n  "keyAuthorization": "bZjyeq34-f_T4bUcy1DVhPbnv_CanSu1c5PUezrhjqI.B7zuU4v6Umg0TGs8jOHl_ihptyLw9pPsE1dRzUZoOu0"\n}'
2016-07-19 17:03:30,903:DEBUG:acme.client:Storing nonce: 'Ts\xd6\xf5\xa4|\x8ek\x92\x86\x9f)\x16\xb1n\xc4X\x90j\x96\xdd\x8a\x9e\x92a\x03s\x05\xa0\xbeo\xb6'
2016-07-19 17:03:30,903:DEBUG:acme.client:Received response <Response [202]> (headers: {'Content-Length': '338', 'Boulder-Request-Id': 'qq5g3DMMDllSKoWuHRIRSY5oy9RNvpHZ9uF_zzYEeuk', 'Expires': 'Tue, 19 Jul 2016 17:03:30 GMT', 'Server': 'nginx', 'Cache-Control': 'max-age=0, no-cache, no-store', 'Connection': 'keep-alive', 'Link': '<https://acme-v01.api.letsencrypt.org/acme/authz/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0>;rel="up"', 'Location': 'https://acme-v01.api.letsencrypt.org/acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466860', 'Pragma': 'no-cache', 'Boulder-Requester': '2692481', 'Date': 'Tue, 19 Jul 2016 17:03:30 GMT', 'Content-Type': 'application/json', 'Replay-Nonce': 'VHPW9aR8jmuShp8pFrFuxFiQapbdip6SYQNzBaC-b7Y'}): '{\n  "type": "tls-sni-01",\n  "status": "pending",\n  "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466860",\n  "token": "bZjyeq34-f_T4bUcy1DVhPbnv_CanSu1c5PUezrhjqI",\n  "keyAuthorization": "bZjyeq34-f_T4bUcy1DVhPbnv_CanSu1c5PUezrhjqI.B7zuU4v6Umg0TGs8jOHl_ihptyLw9pPsE1dRzUZoOu0"\n}'
2016-07-19 17:03:33,906:DEBUG:root:Sending GET request to https://acme-v01.api.letsencrypt.org/acme/authz/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0. args: (), kwargs: {}
2016-07-19 17:03:34,184:DEBUG:requests.packages.urllib3.connectionpool:"GET /acme/authz/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0 HTTP/1.1" 200 1473
2016-07-19 17:03:34,185:DEBUG:root:Received <Response [200]>. Headers: {'Content-Length': '1473', 'Expires': 'Tue, 19 Jul 2016 17:03:34 GMT', 'Boulder-Request-Id': 'kbximz8gXN1-tbWUpkkxA5s9PyXQMnZ3DM2mztNnv00', 'Strict-Transport-Security': 'max-age=604800', 'Server': 'nginx', 'Connection': 'keep-alive', 'Link': '<https://acme-v01.api.letsencrypt.org/acme/new-cert>;rel="next"', 'Pragma': 'no-cache', 'Cache-Control': 'max-age=0, no-cache, no-store', 'Date': 'Tue, 19 Jul 2016 17:03:34 GMT', 'X-Frame-Options': 'DENY', 'Content-Type': 'application/json', 'Replay-Nonce': '9rCskcPn_HaHylVaCH-VViSBt78YdDh-I10sX5UlXak'}. Content: '{\n  "identifier": {\n    "type": "dns",\n    "value": "xxxxxxxxxxxxxxxxxxxx.com"\n  },\n  "status": "invalid",\n  "expires": "2016-07-26T17:03:30Z",\n  "challenges": [\n    {\n      "type": "dns-01",\n      "status": "pending",\n      "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466859",\n      "token": "6Z6vCV4zSvxn5U6WxpUcf2imTMT5kLj7rbRN5fmF9GI"\n    },\n    {\n      "type": "tls-sni-01",\n      "status": "invalid",\n      "error": {\n        "type": "urn:acme:error:connection",\n        "detail": "DNS problem: SERVFAIL looking up A for xxxxxxxxxxxxxxxxxxxx.com",\n        "status": 400\n      },\n      "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466860",\n      "token": "bZjyeq34-f_T4bUcy1DVhPbnv_CanSu1c5PUezrhjqI",\n      "keyAuthorization": "bZjyeq34-f_T4bUcy1DVhPbnv_CanSu1c5PUezrhjqI.B7zuU4v6Umg0TGs8jOHl_ihptyLw9pPsE1dRzUZoOu0",\n      "validationRecord": [\n        {\n          "hostname": "xxxxxxxxxxxxxxxxxxxx.com",\n          "port": "",\n          "addressesResolved": null,\n          "addressUsed": ""\n        }\n      ]\n    },\n    {\n      "type": "http-01",\n      "status": "pending",\n      "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466861",\n      "token": "G581_pOSgF203q69BWk8tmHt1YH8lMLAidtBBQ90vnQ"\n    }\n  ],\n  "combinations": [\n    [\n      0\n    ],\n    [\n      2\n    ],\n    [\n      1\n    ]\n  ]\n}'
2016-07-19 17:03:34,185:DEBUG:acme.client:Received response <Response [200]> (headers: {'Content-Length': '1473', 'Expires': 'Tue, 19 Jul 2016 17:03:34 GMT', 'Boulder-Request-Id': 'kbximz8gXN1-tbWUpkkxA5s9PyXQMnZ3DM2mztNnv00', 'Strict-Transport-Security': 'max-age=604800', 'Server': 'nginx', 'Connection': 'keep-alive', 'Link': '<https://acme-v01.api.letsencrypt.org/acme/new-cert>;rel="next"', 'Pragma': 'no-cache', 'Cache-Control': 'max-age=0, no-cache, no-store', 'Date': 'Tue, 19 Jul 2016 17:03:34 GMT', 'X-Frame-Options': 'DENY', 'Content-Type': 'application/json', 'Replay-Nonce': '9rCskcPn_HaHylVaCH-VViSBt78YdDh-I10sX5UlXak'}): '{\n  "identifier": {\n    "type": "dns",\n    "value": "xxxxxxxxxxxxxxxxxxxx.com"\n  },\n  "status": "invalid",\n  "expires": "2016-07-26T17:03:30Z",\n  "challenges": [\n    {\n      "type": "dns-01",\n      "status": "pending",\n      "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466859",\n      "token": "6Z6vCV4zSvxn5U6WxpUcf2imTMT5kLj7rbRN5fmF9GI"\n    },\n    {\n      "type": "tls-sni-01",\n      "status": "invalid",\n      "error": {\n        "type": "urn:acme:error:connection",\n        "detail": "DNS problem: SERVFAIL looking up A for xxxxxxxxxxxxxxxxxxxx.com",\n        "status": 400\n      },\n      "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466860",\n      "token": "bZjyeq34-f_T4bUcy1DVhPbnv_CanSu1c5PUezrhjqI",\n      "keyAuthorization": "bZjyeq34-f_T4bUcy1DVhPbnv_CanSu1c5PUezrhjqI.B7zuU4v6Umg0TGs8jOHl_ihptyLw9pPsE1dRzUZoOu0",\n      "validationRecord": [\n        {\n          "hostname": "xxxxxxxxxxxxxxxxxxxx.com",\n          "port": "",\n          "addressesResolved": null,\n          "addressUsed": ""\n        }\n      ]\n    },\n    {\n      "type": "http-01",\n      "status": "pending",\n      "uri": "https://acme-v01.api.letsencrypt.org/acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466861",\n      "token": "G581_pOSgF203q69BWk8tmHt1YH8lMLAidtBBQ90vnQ"\n    }\n  ],\n  "combinations": [\n    [\n      0\n    ],\n    [\n      2\n    ],\n    [\n      1\n    ]\n  ]\n}'
2016-07-19 17:03:34,186:DEBUG:acme.challenges:dns-01 was not recognized, full message: {u'status': u'pending', u'token': u'6Z6vCV4zSvxn5U6WxpUcf2imTMT5kLj7rbRN5fmF9GI', u'type': u'dns-01', u'uri': u'https://acme-v01.api.letsencrypt.org/acme/challenge/C8A3Age_Z-MjpcLCotd2af-iWSl02mOqRcBgpacQSw0/184466859'}
2016-07-19 17:03:34,186:INFO:certbot.reporter:Reporting to user: The following errors were reported by the server:

Domain: xxxxxxxxxxxxxxxxxxxx.com
Type:   connection
Detail: DNS problem: SERVFAIL looking up A for xxxxxxxxxxxxxxxxxxxx.com

To fix these errors, please make sure that your domain name was entered correctly and the DNS A record(s) for that domain contain(s) the right IP address. Additionally, please check that your computer has a publicly routable IP address and that no firewalls are preventing the server from communicating with the client. If you're using the webroot plugin, you should also verify that you are serving files from the webroot path you provided.
2016-07-19 17:03:34,186:INFO:certbot.auth_handler:Cleaning up challenges
2016-07-19 17:03:34,187:DEBUG:certbot.plugins.standalone:Stopping server at 0.0.0.0:443...
2016-07-19 17:03:34,646:DEBUG:certbot.main:Exiting abnormally:
Traceback (most recent call last):
  File "/home/ec2-user/.local/share/letsencrypt/bin/letsencrypt", line 11, in <module>
    sys.exit(main())
  File "/home/ec2-user/.local/share/letsencrypt/local/lib/python2.7/dist-packages/certbot/main.py", line 744, in main
    return config.func(config, plugins)
  File "/home/ec2-user/.local/share/letsencrypt/local/lib/python2.7/dist-packages/certbot/main.py", line 555, in obtain_cert
_, action = _auth_from_domains(le_client, config, domains, lineage)
  File "/home/ec2-user/.local/share/letsencrypt/local/lib/python2.7/dist-packages/certbot/main.py", line 94, in _auth_from_domains
lineage = le_client.obtain_and_enroll_certificate(domains)
  File "/home/ec2-user/.local/share/letsencrypt/local/lib/python2.7/dist-packages/certbot/client.py", line 276, in obtain_and_enroll_certificate
certr, chain, key, _ = self.obtain_certificate(domains)
  File "/home/ec2-user/.local/share/letsencrypt/local/lib/python2.7/dist-packages/certbot/client.py", line 247, in obtain_certificate
self.config.allow_subset_of_names)
  File "/home/ec2-user/.local/share/letsencrypt/local/lib/python2.7/dist-packages/certbot/auth_handler.py", line 74, in get_authorizations
self._respond(resp, best_effort)
  File "/home/ec2-user/.local/share/letsencrypt/local/lib/python2.7/dist-packages/certbot/auth_handler.py", line 131, in _respond
self._poll_challenges(chall_update, best_effort)
  File "/home/ec2-user/.local/share/letsencrypt/local/lib/python2.7/dist-packages/certbot/auth_handler.py", line 195, in _poll_challenges
raise errors.FailedChallenges(all_failed_achalls)
FailedChallenges: Failed authorization procedure. xxxxxxxxxxxxxxxxxxxx.com (tls-sni-01): urn:acme:error:connection :: The server could not connect to the client to verify the domain :: DNS problem: SERVFAIL looking up A for xxxxxxxxxxxxxxxxxxxx.com

2016-07-19 17:03:29603:调试：certbot.main:根日志记录级别设置为30
2016-07-19 17:03:29604:信息：certbot.main:将调试日志保存到/var/log/letsencrypt/letsencrypt.log
2016-07-19 17:03:29604:调试：certbot.main:certbot版本：0.8.1
2016-07-19 17:03:29604:调试：certbot.main:参数：['--DEBUG'，'--standalone'，'-d'，dev.*****.com']
2016-07-19 17:03:29605:调试：certbot.main:发现的插件：PluginsRegistry（PlugentryPoint#apache，PlugentryPoint#webroot，PlugentryPoint#null，PlugentryPoint#手动，PlugentryPoint#独立）
2016-07-19 17:03:29609:调试：certbot.插件。选择：请求的独立身份验证程序和安装程序无
2016-07-19 17:03:29804:调试：certbot.插件选择：单个候选插件：*独立
描述：自动使用临时Web服务器
接口：IAuthenticator、IPlugin
入口点：standalone=certbot.plugins.standalone:Authenticator
初始化：
准备：对
2016-07-19 17:03:29806:调试：certbot.插件.选择：所选验证器和安装程序无
2016-07-19 17:03:29942:调试：certbot.主：选择的帐户：
2016-07-19 17:03:29943:调试：根用户：向发送GET请求https://acme-v01.api.letsencrypt.org/directory. args:（），kwargs:{}
2016-07-19 17:03:29946:信息：requests.packages.urllib3.connectionpool:启动新的HTTPS连接（1）：acme-v01.api.letsencrypt.org
2016-07-19 17:03:30132:调试：请求.包.urllib3.连接池：“GET/directory HTTP/1.1”200 280
2016-07-19 17:03:30133:调试：根目录：已收到。标题：{'Content-Length'：'280'，'Expires'：'Tue，2016年7月19日17:03:30 GMT'，'Boulder请求Id'：'a4t6le9szztzdv0fuce7bqnicx2zyvtrveqacswenkue'，'Strict Transport Security'：'max age=604800'，'Server'：'nginx'，'Connection'：'keep alive'，'Pragma'：'no cache'，'cache Control:'max age=0，no cache，no store'，'Date:'Tue，2016年7月19日17:03:30 GMT'，'X-帧选项“：”拒绝“，”内容类型“：”应用程序/json“，”重播当前“：”VLINXCME9YZNBXPDISR5YQFQF9KFT3GRGMLFWVD3JG“}。内容：“{\n“新身份验证”：”https://acme-v01.api.letsencrypt.org/acme/new-authz，\n“新证书”：https://acme-v01.api.letsencrypt.org/acme/new-cert，\n“新注册”：https://acme-v01.api.letsencrypt.org/acme/new-reg“，\n“吊销证书”：https://acme-v01.api.letsencrypt.org/acme/revoke-cert“\n}”
2016-07-19 17:03:30133:调试：acme.客户端：收到响应（标题：{'Content-Length'：'280'，'Expires'：'Tue，2016年7月19日17:03:30 GMT'，'Boulder请求Id'：'a4t6le9szztzdv0fuce7bqnicx2zyvtrveqacswenkue'，'Strict Transport Security'：'max age=604800'，'Server'：'nginx'，'Connection'：'keep alive'，'Pragma'：'no cache'，'cache Control:'max age=0，no cache，no store'，'Date:'Tue，2016年7月19日17:03:30 GMT'，'X-帧选项“：”拒绝“，”内容类型“：”应用程序/json“，”重播当前“：”VLINXCME9YZNBXPDISR5YQFQF9KFT3GRGMLFWVD3JG'}）：“{\n“新身份验证”：”https://acme-v01.api.letsencrypt.org/acme/new-authz，\n“新证书”：https://acme-v01.api.letsencrypt.org/acme/new-cert，\n“新注册”：https://acme-v01.api.letsencrypt.org/acme/new-reg“，\n”撤销证书“：”https://acme-v01.api.letsencrypt.org/acme/revoke-cert“\n}”
2016-07-19 17:03:30134:调试：根用户：请求新的nonce
2016-07-19 17:03:30134:调试：根用户：向发送头请求https://acme-v01.api.letsencrypt.org/acme/new-authz. args:（），kwargs:{}
2016-07-19 17:03:30327:调试：请求.包.urllib3.连接池：“HEAD/acme/new authz HTTP/1.1”4050
2016-07-19 17:03:30328:调试：根目录：已接收。标题：{'Content-Length'：'91'，'Pragma'：'no cache'，'Boulder Request Id'：'zZzFamjI7WOmh85keAw4lLd8laZfe74W1TYq3HNR7mk'，'Expires'：'Tue，Jul 19 Jul 2016 17:03:30 GMT'，'Server'：'nginx'，'Connection'：'keep alive'，'Allow'：'POST'，'cache Control:'max age=0，no cache，no store日期'：'Tue，Jul 19 2016 17:03:30 GMT'，'Content Type'：'application'在/problem+json“，”Replay Nonce“：”CgmdRQWWj5_PPfveAA7c1o50xkOk3entsaA27xlBwmA“}上。内容：“”
2016-07-19 17:03:30328：调试：acme.client:存储当前值：'\n\t\x9dE\x05\x96\x8f\x9f\xcf=\xfb\xde\x00\x0e\xdc\xd6\x8et\xc6C\xa4\xdd\xe9\xed\xb1\xa06\xef\x19A\xc2`'
2016-07-19 17:03:30328:调试：acme.jose.json_util:省略的空字段：combines=None，challenges=None，expires=None，status=None
2016-07-19 17:03:30329:调试：acme.client:序列化JSON:{“标识符”：{“类型”：“dns”，“值”：“xxxxxxxx.com”}，“资源”：“新身份验证”}
2016-07-19 17:03:30330:调试：acme.jose.json_util:省略的空字段：kid=None，x5c=（），crit=（），jwk=None，typ=None，jku=None，cty=None，x5tS256=None，x5u=None，alg=None，x5t=None
2016-07-19 17:03:30332:调试：acme.jose.json_util:省略的空字段：kid=None，x5c=（），crit=（），typ=None，jku=None，cty=None，x5tS256=None，x5u=None，x5t=None=None
2016-07-19 17:03:30332:调试：根用户：向发送POST请求https://acme-v01.api.letsencrypt.org/acme/new-authz. args:（），kwargs:{'data'：{“header”：{“alg”：“RS256”，“jwk”：{“e”：“AQAB”，“kty”：“RSA”，“n”：2.在中国的一个准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准准Qahsun3H3LSXLGFZ0Z2N2AW“}，”受保护：“有效载荷”：“有效载荷”：“有效载荷”：“有效载荷”：“有效载荷”：“有效载荷”：“有效载荷”：“有效载荷”：“有效载荷”：“有效载荷”：“有效载荷”：“有效载荷”：