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[英]Erlang: {error,timeout} when starting the 14th slave on the same machine
[英]Erlang: Cannot start slave - {error,timeout}
我目前正在嘗試建立一個使用Erlang從屬功能的分布式Tsung負載測試環境,但是我沒有成功地讓控制器節點啟動從屬節點。 例如
(musicglue@load1)1> net:ping(musicglue@load2).
pong
(musicglue@load1)2> slave:start(load2,musicglue,"-setcookie tom").
{error,timeout}
我的環境:
控制器 - 主機名:load1,用戶:musicglue,Ubuntu 10.04 LTS,Erlang R15B01從源Slave編譯 - 主機名:load2,用戶:musicglue,Ubuntu 10.04 LTS,Erlang R15B01從源防火牆禁用SELinux未安裝
工作的事情:
Ping輸出:
musicglue@load1:~$ erl -rsh ssh -sname musicglue -setcookie tom
Erlang R15B01 (erts-5.9.1) [source] [64-bit] [smp:4:4] [async-threads:
0] [hipe] [kernel-poll:false]
Eshell V5.9.1 (abort with ^G)
(musicglue@load1)1> net:ping(musicglue@load2).
pong
嘗試從load2上的load1啟動從屬會話時出現問題:
musicglue@load1:~$ erl -rsh ssh -sname musicglue -setcookie tom
Erlang R15B01 (erts-5.9.1) [source] [64-bit] [smp:4:4] [async-threads:
0] [hipe] [kernel-poll:false]
Eshell V5.9.1 (abort with ^G)
(musicglue@load1)1> net:ping(musicglue@load2).
pong
(musicglue@load1)2> slave:start(load2,musicglue,"-setcookie
tom").
{error,timeout}
這是我運行slave時從epmd獲得的輸出:start命令:
epmd: Thu May 24 10:01:57 2012: Non-local peer connected
epmd: Thu May 24 10:01:57 2012: opening connection on file descriptor
4
epmd: Thu May 24 10:01:57 2012: got 12 bytes
***** 00000000 00 0a 7a 6d 75 73 69 63 67 6c 75 65
|..zmusicglue|
epmd: Thu May 24 10:01:57 2012: ** got PORT2_REQ
epmd: Thu May 24 10:01:57 2012: got 2 bytes
***** 00000000 77 01 |w.|
epmd: Thu May 24 10:01:57 2012: ** sent PORT2_RESP (error) for
"musicglue"
epmd: Thu May 24 10:01:57 2012: closing connection on file descriptor
4
epmd: Thu May 24 10:01:57 2012: Local peer connected
epmd: Thu May 24 10:01:57 2012: opening connection on file descriptor
4
epmd: Thu May 24 10:01:57 2012: got 24 bytes
***** 00000000 00 16 78 ca d6 4d 00 00 05 00 05 00 09 6d 75 73
|..x..M.......mus|
***** 00000010 69 63 67 6c 75 65 00 00 |
icglue..|
epmd: Thu May 24 10:01:57 2012: ** got ALIVE2_REQ
epmd: Thu May 24 10:01:57 2012: registering 'musicglue:1', port 51926
epmd: Thu May 24 10:01:57 2012: type 77 proto 0 highvsn 5 lowvsn 5
epmd: Thu May 24 10:01:57 2012: got 4 bytes
***** 00000000 79 00 00 01 |
y...|
epmd: Thu May 24 10:01:57 2012: ** sent ALIVE2_RESP for "musicglue"
epmd: Thu May 24 10:01:57 2012: unregistering 'musicglue:1', port
51926
epmd: Thu May 24 10:01:57 2012: closing connection on file descriptor
4
任何人的任何幫助或建議將不勝感激,
非常感謝
我還要提一下,我可以看到load2成功確認了ssh連接,但后來立即斷開連接:
May 30 13:49:27 load2 sshd[16169]: Accepted publickey for musicglue from 173.45.236.182 port 51843 ssh2
May 30 13:49:27 load2 sshd[16171]: Received disconnect from 173.45.236.182: 11: disconnected by user
為了回應下面的評論,我還嘗試使用不同的節點名稱來啟動從站:
musicglue@load1:~$ erl -rsh ssh -sname musicglue -setcookie tom
Erlang R15B01 (erts-5.9.1) [source] [64-bit] [smp:4:4] [async-threads:0] [hipe] [kernel-poll:false]
Eshell V5.9.1 (abort with ^G)
(musicglue@load1)1> slave:start(load2,bar,"-setcookie tom").
{error,timeout}
並為控制器:
musicglue@load1:~$ erl -rsh ssh -sname foo -setcookie tom
Erlang R15B01 (erts-5.9.1) [source] [64-bit] [smp:4:4] [async-threads:0] [hipe] [kernel-poll:false]
Eshell V5.9.1 (abort with ^G)
(foo@load1)1> slave:start(load2,musicglue,"-setcookie tom").
{error,timeout}
對於兩者:
musicglue@load1:~$ erl -rsh ssh -sname foo -setcookie tom
Erlang R15B01 (erts-5.9.1) [source] [64-bit] [smp:4:4] [async-threads:0] [hipe] [kernel-poll:false]
Eshell V5.9.1 (abort with ^G)
(foo@load1)1> slave:start(load2,bar,"-setcookie tom").
{error,timeout}
但無濟於事
事實證明我的問題是我的奴隸無法通過SSH連接到控制器,因此無法響應任何命令。
在修復這兩個節點之間的通信端口后,每個人都完美地工作。
嘗試通過在PATH
某個位置創建這樣的shell腳本來記錄通過SSH進行的操作:
#!/bin/sh
echo "$0" "$@" > /tmp/my-ssh.log
ssh -v "$@" 2>&1 | tee -a /tmp/my-ssh.log
說它是my-ssh
,下手二郎erl -rsh my-ssh
,並檢查什么進入/tmp/my-ssh.log
。 這應該可以解釋這個問題......
對於那些通過Google發現此問題的人來說,另一個答案。 如果您嘗試在單獨的計算機上啟動服務,則必須解析控制器節點名稱。
例如,我有以下時間:
> node().
someName@host.domain.com
> slave:start('192.168.122.196',bar,"-setcookie cookie").
{error,timeout}
通過使用顯式域名啟動我的erlang實例:
erl -name someName@192.168.1.5 -setcookie cookie
> slave:start('192.168.122.196',bar,"-setcookie cookie").
此命令現在成功。
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