sensu 服务器、客户端和 api 无法启动

Question

我已经使用http://sensuapp.org/docs/latest/guide 的说明在 CentOS-6.5 上安装了 sensu，但我似乎无法启动 sensu-server、sensu-client 甚至 sensu-api。任何建议将不胜感激。

以下是 /var/log/sensu/sensu-server.log 中记录的错误：

{"timestamp":"2014-10-20T16:58:25.875472+0800","level":"warn","message":"config file does not exist or is not readable","file":"/etc/sensu/config.json"}
{"timestamp":"2014-10-20T16:58:25.875800+0800","level":"warn","message":"ignoring config file","file":"/etc/sensu/config.json"}
{"timestamp":"2014-10-20T16:58:25.875986+0800","level":"warn","message":"loading config files from directory","directory":"/etc/sensu/conf.d"}
{"timestamp":"2014-10-20T16:58:25.876180+0800","level":"warn","message":"loading config file","file":"/etc/sensu/conf.d/rabbitmq.json"}
{"timestamp":"2014-10-20T16:58:25.876383+0800","level":"warn","message":"loading config file","file":"/etc/sensu/conf.d/redis.json"}
{"timestamp":"2014-10-20T16:58:25.876656+0800","level":"warn","message":"config file applied changes","file":"/etc/sensu/conf.d/redis.json","changes":{"redis":[null {"host":"localhost","port":6379}]}}
{"timestamp":"2014-10-20T16:58:25.876852+0800","level":"warn","message":"loading config file","file":"/etc/sensu/conf.d/client.json"}
{"timestamp":"2014-10-20T16:58:25.877063+0800","level":"warn","message":"config file applied changes","file":"/etc/sensu/conf.d/client.json","changes":{"client":[null,{"name":"george-db3","address":"SUBSTITUTE_ME","subscriptions":["all"]}]}}
{"timestamp":"2014-10-20T16:58:25.877277+0800","level":"warn","message":"loading config file","file":"/etc/sensu/conf.d/api.json"}
{"timestamp":"2014-10-20T16:58:25.877513+0800","level":"warn","message":"config file applied changes","file":"/etc/sensu/conf.d/api.json","changes":{"api":[null {"host":"localhost","port":4567,"user":"admin","password":"REDACTED"}]}}
{"timestamp":"2014-10-20T16:58:25.897183+0800","level":"warn","message":"loading extension files from directory","directory":"/etc/sensu/extensions"}
{"timestamp":"2014-10-20T16:58:25.897740+0800","level":"warn","message":"loaded extension","type":"mutator","name":"json","description":"returns JSON formatted event data"}
{"timestamp":"2014-10-20T16:58:25.897923+0800","level":"warn","message":"loaded extension","type":"mutator","name":"ruby_hash","description":"returns ruby hash event data"}
{"timestamp":"2014-10-20T16:58:25.898093+0800","level":"warn","message":"loaded extension","type":"mutator","name":"only_check_output","description":"returns check output"}
{"timestamp":"2014-10-20T16:58:25.898257+0800","level":"warn","message":"loaded extension","type":"handler","name":"debug","description":"returns raw event data"}
/opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-em-2.4.0/lib/eventmachine.rb:673:in `connect_server': unable to resolve server address (EventMachine::ConnectionError)
    from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-em-2.4.0/lib/eventmachine.rb:673:in `bind_connect'
    from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-em-2.4.0/lib/eventmachine.rb:649:in `connect'
    from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/amqp-1.3.0/lib/amqp/session.rb:445:in `connect'
    from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/amqp-1.3.0/lib/amqp.rb:242:in `connect'
    from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-transport-1.0.0/lib/sensu/transport/rabbitmq.rb:17:in `connect'
    from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-transport-1.0.0/lib/sensu/transport.rb:22:in `connect'
    from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-0.14.0/lib/sensu/daemon.rb:133:in `setup_transport'
    from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-0.14.0/lib/sensu/server.rb:726:in `start'
    from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-0.14.0/lib/sensu/server.rb:14:in `block in run'
    from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-em-2.4.0/lib/eventmachine.rb:187:in `call'
    from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-em-2.4.0/lib/eventmachine.rb:187:in `run_machine'
    from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-em-2.4.0/lib/eventmachine.rb:187:in `run'
    from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-0.14.0/lib/sensu/server.rb:13:in `run'
    from /opt/sensu/embedded/lib/ruby/gems/2.0.0/gems/sensu-0.14.0/bin/sensu-server:10:in `<top (required)>'
    from /opt/sensu/bin/sensu-server:23:in `load'
    from /opt/sensu/bin/sensu-server:23:in `<main>'

Answer 1

通常是消息

unable to resolve server address (EventMachine::ConnectionError)

是 sensu 组件（服务器、客户端、api）无法连接到您的 RabbitMQ 服务器的结果。

检查事项：

1. RabbitMQ 服务器是否启动并运行？

   检查service rabbitmq-server status

2. RabbitMQ 服务器是否可解析/可访问？

   如果您遵循 sensu 文档，我假设您的 RabbitMQ 是本地的，所以这应该不是问题。

3. 升级到最新版本的sensu（目前为0.16.0）。

   每个问题#747 的 0.13.0 中都包含针对 RabbitMQ 连接失败崩溃的修复。