Topod is a simple PAAS tools, focus on light weight configuration management and service discovery :
Keep your configuration files up-to-date by watching changes of remote storage like etcd
View and modify central congifuration for your projects, get a global scene for your mess configuration
When central configuration changed , topod can reload your process by excurte some shell commands
Discover service and collection serivce description by scannning some ports range you have customed, and automatic modify target keys to change some process config file who cares about these service