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AWS-弹性负载均衡器无法处理请求

tag-icon • tag-icon domain-name-system amazon-web-services load-balancing
AWS-弹性负载均衡器无法处理请求

我对AWS 与世界。我的问题是在向 AWS 服务器发出请求时。我有一台服务器staging-storage.zazzercode.co指向以下服务器DNS's，并配有相应的负载均衡器，

s-storage-us-west-2-483191837.us-west-2.elb.amazonaws.com => s-storage-us-west-2
s-storage-us-east-1-1318227839.us-east-1.elb.amazonaws.com => s-storage-us-east-1

我住在东方世界。

点 0

我将实例大小从 升级t1.micro到m3.medium希望这个问题能够得到解决。

要点1

使用主机名向服务器发出请求时'staging-storage.zazzercode.co'，我在请求中收到以下错误curl，

curl: (6) Couldn't resolve host 'staging-storage.zazzercode.co'

根据man curl，6是，

6      Couldn't resolve host. The given remote host was not resolved.

要点2

它有时会告诉我

HTTP/1.1 100 Continue

HTTP/1.1 504 Gateway Timeout
Content-length:0

此处记录了 -排除 Elastic Load Balancing 故障：错误消息建议

  1. 负载均衡器容量不足以处理请求。（暂时性问题）
  2. 实例正在关闭与 ELB 的连接。

要点3

经过几次尝试后，它做出了正确的响应。我的团队中的其他人也面临同样的问题。

要点4

当我 ping 主机名时，它挂了

$ ping staging-storage.zazzercode.co
PING s-storage-us-west-2-483191837.us-west-2.elb.amazonaws.com (54.199.188.111) 56(84) bytes of data.

要点5

我可以正确地处理ssh这两个例子。

要点6

nslookup给zazzercode.co我，

$ nslookup -type=NS zazzercode.co
Server:     127.0.1.1
Address:    127.0.1.1#53

Non-authoritative answer:
zazzercode.co   nameserver = ns-1605.awsdns-08.co.uk.
zazzercode.co   nameserver = ns-1302.awsdns-34.org.
zazzercode.co   nameserver = ns-510.awsdns-63.com.
zazzercode.co   nameserver = ns-692.awsdns-22.net.

Authoritative answers can be found from:

nslookup给staging-storage.zazzercode.co我，

$ nslookup -q=NS staging-storage.zazzercode.co
Server:     127.0.1.1
Address:    127.0.1.1#53

Non-authoritative answer:
staging-storage.zazzercode.co   canonical name = s-storage-us-west-2-483191837.us-west-2.elb.amazonaws.com.

Authoritative answers can be found from:
us-west-2.elb.amazonaws.com
    origin = ns-332.awsdns-41.com
    mail addr = awsdns-hostmaster.amazon.com
    serial = 1
    refresh = 7200
    retry = 900
    expire = 1209600
    minimum = 60

要点 7

挖掘zazzercode.co让我，

$ dig TXT  ns-692.awsdns-22.net _amazonses.zazzercode.co

; <<>> DiG 9.9.2-P1 <<>> TXT ns-692.awsdns-22.net _amazonses.zazzercode.co
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 33984
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;ns-692.awsdns-22.net.      IN  TXT

;; Query time: 46 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Thu Jul 24 11:54:31 2014
;; MSG SIZE  rcvd: 49

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 30277
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;_amazonses.zazzercode.co.  IN  TXT

;; AUTHORITY SECTION:
zazzercode.co.      900 IN  SOA ns-692.awsdns-22.net. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400

;; Query time: 173 msec
;; SERVER: 127.0.1.1#53(127.0.1.1)
;; WHEN: Thu Jul 24 11:54:31 2014
;; MSG SIZE  rcvd: 137

我怀疑是负载均衡器问题。有没有办法检查负载均衡器正在断开连接？或者这里可能存在什么问题？

如果需要的话我会提供更多详细信息。

（zazzercode.co此处为虚构名称，用于隐藏实际名称，soothsayer.co其他所有名称均保持不变）

参考

EC2 Elastic Load Balancer DNS 和路由问题

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