我有一个使用AWS Elastic Beanstalk配置的Ruby堆栈。上周，我的所有部署都没问题，但是由于我尝试将MySQL RDS DB更改为使用UTF-8，因此每次运行eb deploy时都会遇到此问题：
INFO: Environment update is starting.
INFO: Deploying new version to instance(s).
ERROR: UnicodeEncodeError :: 'ascii' codec can't encode character u'\u2018' in position 90: ordinal not in range(128)
当我检查AWS EB界面时，收到此错误消息：
[Instance: i-2a4575cc] Command failed on instance. Return code: 1 Output: cp: cannot stat ‘/var/tmp/backup/10_bundle_install.sh’: No such file or directory. Hook /opt/elasticbeanstalk/hooks/appdeploy/post/05_revert_bundle_install_local.sh failed. For more detail, check /var/log/eb-activity.log using console or EB CLI.
最后，我检查了上面提到的/var/log/eb-activity.log，最后几行如下：
[2015-06-16T09:03:39.079Z] INFO [23525] - [CMD-AppDeploy/AppDeployStage1/AppDeployEnactHook] : Completed activity. Result:
Successfully execute hooks in directory /opt/elasticbeanstalk/hooks/appdeploy/enact.
[2015-06-16T09:03:39.079Z] INFO [23525] - [CMD-AppDeploy/AppDeployStage1/AppDeployPostHook] : Starting activity...
[2015-06-16T09:03:39.079Z] INFO [23525] - [CMD-AppDeploy/AppDeployStage1/AppDeployPostHook/05_revert_bundle_install_local.sh] : Starting activity...
[2015-06-16T09:03:39.088Z] INFO [23525] - [CMD-AppDeploy/AppDeployStage1/AppDeployPostHook/05_revert_bundle_install_local.sh] : Activity execution failed, because: cp: cannot stat ‘/var/tmp/backup/10_bundle_install.sh’: No such file or directory (ElasticBeanstalk::ExternalInvocationError)
caused by: cp: cannot stat ‘/var/tmp/backup/10_bundle_install.sh’: No such file or directory (Executor::NonZeroExitStatus)
[2015-06-16T09:03:39.088Z] INFO [23525] - [CMD-AppDeploy/AppDeployStage1/AppDeployPostHook/05_revert_bundle_install_local.sh] : Activity failed.
[2015-06-16T09:03:39.088Z] INFO [23525] - [CMD AppDeploy/AppDeployStage1/AppDeployPostHook] : Activity failed.
[2015-06-16T09:03:39.088Z] INFO [23525] - [CMD-AppDeploy/AppDeployStage1] : Activity failed.
[2015-06-16T09:03:39.088Z] INFO [23525] - [CMD-AppDeploy] : Completed activity. Result:
Command CMD-AppDeploy failed.
问题似乎来自05_revert_bundle_install_local.sh脚本中请求的cp命令：
cp -a /var/tmp/backup/10_bundle_install.sh /opt/elasticbeanstalk/hooks/appdeploy/pre/10_bundle_install.sh
/var/tmp/backup/10_bundle_install.sh不存在。
你知道会发生什么吗？我如何解决它以避免错误消息并进行干净的部署？
谢谢！