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#介紹
* RC和RS主要控制提供無狀態服務的，其控制的Pod名稱和啟動位置是隨機
* PetSet控制有狀態服務，PetSet中每個Pod名字事先確定，**不可更改**
* PetSet中名字關聯該Pod對應的狀態
* RC與RS中的Pod一般掛載共享存儲或者不掛載存儲，保存的是所有Pod共享的狀態
* PetSet中的Pod，每個Pod掛載**獨立**的存儲
* 如果PetSet中Pod出現故障，其他節點啟動一個同樣名字的Pod，同時需要掛載上原來的存儲
* 適用于PetSet的業務包括包括數據庫服務MySQL和PostgreSQL，集群化管理服務Zookeeper、etcd等有狀態服務
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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