问题3：dea的日志有问题
问题描述：在查看dea的log（位于$HOME/cloudfoundry/.deployment/dea/log/ 目录下）的时候发现下面的提示信息，runtime not support。
[2012-09-20 22:04:50.898873] dea - pid=12396 tid=d39f fid=99c9 DEBUG -- DEA received discovery message: {"droplet":12,"limits":{"mem":128,"disk":2048,"fds":256},"name":"hello","runtime_info":{"version":"1.8.7","description":"Ruby 1.8.7","executable":"/root/cloudfoundry/.deployments/rest/deploy/rubies/ruby-1.8.7-p357/bin/ruby","version_flag":"-e 'puts RUBY_VERSION'","additional_checks":"-e 'puts RUBY_PATCHLEVEL >= 174'","version_output":"1.8.7","environment":{"PATH":"/root/cloudfoundry/.deployments/rest/deploy/rubies/ruby-1.8.7-p357/bin:$PATH","BUNDLE_GEMFILE":null},"name":"ruby18"},"runtime":"ruby18","prod":false,"sha":"012b0fc043c9e03a03bf7f3432a0fc9c54d14ba1"}
[2012-09-20 22:04:50.899769] dea - pid=12396 tid=d39f fid=99c9 DEBUG -- Ignoring request, runtime not enabled for 'ruby18'
[2012-09-20 22:04:50.899939] dea - pid=12396 tid=d39f fid=99c9 DEBUG -- Ignoring request, {"version"=>"1.8.7", "description"=>"Ruby 1.8.7", "executable"=>"/root/cloudfoundry/.deployments/rest/deploy/rubies/ruby-1.8.7-p357/bin/ruby", "version_flag"=>"-e 'puts RUBY_VERSION'", "additional_checks"=>"-e 'puts RUBY_PATCHLEVEL >= 174'", "version_output"=>"1.8.7", "environment"=>{"PATH"=>"/root/cloudfoundry/.deployments/rest/deploy/rubies/ruby-1.8.7-p357/bin:$PATH", "BUNDLE_GEMFILE"=>nil}, "name"=>"ruby18"} runtime not supported.
解决方法：回答之前可以先插卡看下自己的runtimes，如下。说实在的，我没弄明白这边的runtime到底是什么玩意，所以这个问题就稀里糊涂的去网上查了。
vm@vm:~/cloudfoundry/vcap/dev_setup$ vmc runtimes
+--------------+---------------+-----------+
| Name | Description | Version |
+--------------+---------------+-----------+
| php | PHP 5 | 5.3 |
| node08 | Node.js | 0.8.2 |
| node06 | Node.js | 0.6.8 |
| ruby19 | Ruby 1.9.2 | 1.9.2p180 |
| ruby18 | Ruby 1.8.7 | 1.8.7 |
| java | Java 6 | 1.6 |
| erlangR14B01 | Erlang R14B01 | R14B01 |
| python2 | Python 2.6.5 | 2.6.5 |
| node | Node.js | 0.4.12 |
+--------------+---------------+-----------+
在Google Group里面的答案就是：问题就是这个路径名出现问题了。
Hi
I think the problem is because dea didn't find the correct ruby executable path.
DEBUG -- DEA received discovery message: {"droplet":12,"limits":{"mem":128,"disk":2048,"fds":256},"name":"hello","runtime_info":{"version":"1.8.7","description":"Ruby 1.8.7","executable":"/root/cloudfoundry/.deployments/rest/deploy/rubies/ruby-1.8.7-p357/bin/ruby","version_flag":"-e 'puts RUBY_VERSION'","additional_checks":"-e 'puts RUBY_PATCHLEVEL >= 174'","version_output":"1.8.7","environment":{"PATH":"/root/cloudfoundry/.deployments/rest/deploy/rubies/ruby-1.8.7-p357/bin:$PATH","BUNDLE_GEMFILE":null},"name":"ruby18"},"runtime":"ruby18","prod":false,"sha":"012b0fc043c9e03a03bf7f3432a0fc9c54d14ba1"}
the correct path should be /root/cloudfoundry/.deployments/dea/deploy/rubies/ruby-1.8.7-p357/bin/.
要怎么解决呢？：就是去修改rest这个节点底下的runtimes.yml文件，找到里面对于这个路径名的设置的地方，然后架构rest修改成dea就可以了。
Hi guys:
It worked.
I find the configuration.
/root/cloudfoundry/.deployments/rest/config/runtimes.yml
the path of executable ruby need change to where your dea's ruby located in.
再看dea的log文件，没问题了
vm@vm:~/cloudfoundry/.deployments/dea$ tail log/dea.log
[2012-10-15 16:25:36.540653] dea - pid=6504 tid=a226 fid=0c51 INFO -- Using ruby @ /home/vm/cloudfoundry/.deployments/dea/deploy/rubies/ruby-1.9.2-p180/bin/ruby
[2012-10-15 16:25:36.540896] dea - pid=6504 tid=a226 fid=0c51 INFO -- Using network: 192.168.1.101
[2012-10-15 16:25:36.541032] dea - pid=6504 tid=a226 fid=0c51 INFO -- Socket Limit:1024
[2012-10-15 16:25:36.541099] dea - pid=6504 tid=a226 fid=0c51 INFO -- Max Memory set to 4.0G
[2012-10-15 16:25:36.541159] dea - pid=6504 tid=a226 fid=0c51 INFO -- Utilizing 1 cpu cores
[2012-10-15 16:25:36.541212] dea - pid=6504 tid=a226 fid=0c51 INFO -- Allowing multi-tenancy
[2012-10-15 16:25:36.541273] dea - pid=6504 tid=a226 fid=0c51 INFO -- Using directory: /var/vcap.local/dea/
[2012-10-15 16:25:36.542077] dea - pid=6504 tid=a226 fid=0c51 INFO -- Initial usage of droplet fs is: 0%
[2012-10-15 16:25:36.597228] dea - pid=6504 tid=a226 fid=0c51 INFO -- File service started on port: 12345
[2012-10-15 16:25:36.636433] dea - pid=6504 tid=a226 fid=0c51 DEBUG -- Took 0.002520012 to snapshot application state.