sensu客户端在启动期间失败

Question

尽管我将LOG_LEVEL=debug添加到/etc/default/sensu但我的sensu-client在启动（重新安装）期间失败，并且/var/log/sensu/sensu-client.log并没有显示太多。 我在其他sensu客户端（已复制的ssl证书）上使用了类似的client.json和rabbitmq.json配置文件（在/etc/sensu/conf.d内部）。

   $ sudo service sensu-client start
    [FAILED] sensu-client[  OK  ]

下面是sensu-client日志

$ tail -f /var/log/sensu/sensu-client.log 
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-0.20.3/lib/sensu/daemon.rb:187:in `setup_transport'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-0.20.3/lib/sensu/client/process.rb:412:in `start'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-0.20.3/lib/sensu/client/process.rb:19:in `block in run'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/eventmachine-1.0.3/lib/eventmachine.rb:187:in `call'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/eventmachine-1.0.3/lib/eventmachine.rb:187:in `run_machine'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/eventmachine-1.0.3/lib/eventmachine.rb:187:in `run'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-0.20.3/lib/sensu/client/process.rb:18:in `run'
        from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-0.20.3/bin/sensu-client:10:in `<top (required)>'
        from /opt/sensu/bin/sensu-client:23:in `load'
        from /opt/sensu/bin/sensu-client:23:in `<main>'
^C

这是默认配置

$ cat /etc/default/sensu 
EMBEDDED_RUBY=false
LOG_LEVEL=debug

即使重新启动我的RHEL7也无济于事，请参阅下面的日志

Mar 25 13:09:24 nms02w sensu-client: Starting sensu-client[  OK  ]#015[FAILED]
Mar 25 13:09:24 nms02w systemd: sensu-client.service: control process exited, code=exited status=1
Mar 25 13:09:24 nms02w systemd: Unit sensu-client.service entered failed state.
Mar 25 13:09:24 nms02w systemd: sensu-client.service failed.

添加更多日志：

 systemctl status sensu-client.service
● sensu-client.service - LSB: Sensu monitoring framework client
   Loaded: loaded (/etc/rc.d/init.d/sensu-client)
   Active: failed (Result: exit-code) since Fri 2016-03-25 13:09:24 EDT; 1h 47min ago
     Docs: man:systemd-sysv-generator(8)
  Process: 948 ExecStart=/etc/rc.d/init.d/sensu-client start (code=exited, status=1/FAILURE)

Mar 25 13:09:21 nms02w systemd[1]: Starting LSB: Sensu monitoring framework client...
Mar 25 13:09:21 nms02w runuser[983]: pam_unix(runuser:session): session opened for user sensu by (uid=0)
Mar 25 13:09:24 nms02w sensu-client[948]: [38B blob data]
Mar 25 13:09:24 nms02w systemd[1]: sensu-client.service: control process exited, code=exited status=1
Mar 25 13:09:24 nms02w systemd[1]: Failed to start LSB: Sensu monitoring framework client.
Mar 25 13:09:24 nms02w systemd[1]: Unit sensu-client.service entered failed state.
Mar 25 13:09:24 nms02w systemd[1]: sensu-client.service failed.

Answer 1

我对sensu的旧版本有相同的问题：0.20.3-1此处描述了完整的错误消息：

/opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/eventmachine-1.0.3/lib/eventmachine.rb:859:in `open_udp_socket': no datagram socket (RuntimeError)
from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/eventmachine-1.0.3/lib/eventmachine.rb:859:in `open_datagram_socket'
from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-0.20.3/lib/sensu/client/process.rb:355:in `setup_sockets'
from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-0.20.3/lib/sensu/client/process.rb:413:in `start'
from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-0.20.3/lib/sensu/client/process.rb:19:in `block in run'
from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/eventmachine-1.0.3/lib/eventmachine.rb:187:in `call'
from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/eventmachine-1.0.3/lib/eventmachine.rb:187:in `run_machine'
from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/eventmachine-1.0.3/lib/eventmachine.rb:187:in `run'
from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-0.20.3/lib/sensu/client/process.rb:18:in `run'
from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-0.20.3/bin/sensu-client:10:in `<top (required)>'
from /opt/sensu/bin/sensu-client:23:in `load'
from /opt/sensu/bin/sensu-client:23:in `<main>'

问题是“ open_udp_socket”：没有数据报套接字（RuntimeError） ，这意味着udp套接字已在使用，并且sensu-client无法绑定它。 Okey，您总是可以尝试查找使用套接字的停止进程：

root@xxx- /etc/sensu/conf.d/checks $ netstat -ntulp|grep 3030 
udp     0      0 127.0.0.1:3030   0.0.0.0:*                           603/sudo
root@xxx- /etc/sensu/conf.d/checks $ kill -9 603

之后，sensu-client将正确启动。

root@xxx- /etc/sensu/conf.d/checks $ /etc/init.d/sensu-client start
 * Starting sensu-client                                [ OK ]

亲切的问候