# 多集群场景下有状态应用扩缩容过程中的副本变更顺序 # 扩容场景 例： 当前分布： ```text cluster-01：3 cluster-02：2 ``` 预期分布： ```text cluster-02：3 cluster-03：1 cluster-04：3 ``` 操作集合： ```text Add pod-0.cluster-03 in cluster-03 Current distribution: cluster-01: 3 replicas cluster-02: 2 replicas cluster-03: 1 replicas ---------- Add pod-0.cluster-04 in cluster-04 Current distribution: cluster-01: 3 replicas cluster-02: 2 replicas cluster-03: 1 replicas cluster-04: 1 replicas ---------- Remove pod-0.cluster-01 in cluster-01 Current distribution: cluster-01: 2 replicas cluster-02: 2 replicas cluster-03: 1 replicas cluster-04: 1 replicas ---------- Add pod-1.cluster-04 in cluster-04 Current distribution: cluster-01: 2 replicas cluster-02: 2 replicas cluster-03: 1 replicas cluster-04: 2 replicas ---------- Remove pod-1.cluster-01 in cluster-01 Current distribution: cluster-01: 1 replicas cluster-02: 2 replicas cluster-03: 1 replicas cluster-04: 2 replicas ---------- Add pod-2.cluster-02 in cluster-02 Current distribution: cluster-01: 1 replicas cluster-02: 3 replicas cluster-03: 1 replicas cluster-04: 2 replicas ---------- Add pod-2.cluster-04 in cluster-04 Current distribution: cluster-01: 1 replicas cluster-02: 3 replicas cluster-03: 1 replicas cluster-04: 3 replicas ---------- Remove pod-2.cluster-01 in cluster-01 Current distribution: cluster-01: 0 replicas cluster-02: 3 replicas cluster-03: 1 replicas cluster-04: 3 replicas ---------- ``` # 缩容场景 当前分布： ```text cluster-02：3 cluster-03：1 cluster-04：3 ``` 预期分布： ```text cluster-01：3 cluster-02：2 ``` 操作集合： ```text Add pod-0.cluster-01 in cluster-01 Current distribution: cluster-01: 1 replicas cluster-02: 3 replicas cluster-03: 1 replicas cluster-04: 3 replicas ---------- Remove pod-0.cluster-03 in cluster-03 Current distribution: cluster-01: 1 replicas cluster-02: 3 replicas cluster-03: 0 replicas cluster-04: 3 replicas ---------- Remove pod-0.cluster-04 in cluster-04 Current distribution: cluster-01: 1 replicas cluster-02: 3 replicas cluster-03: 0 replicas cluster-04: 2 replicas ---------- Add pod-1.cluster-01 in cluster-01 Current distribution: cluster-01: 2 replicas cluster-02: 3 replicas cluster-03: 0 replicas cluster-04: 2 replicas ---------- Remove pod-1.cluster-04 in cluster-04 Current distribution: cluster-01: 2 replicas cluster-02: 3 replicas cluster-03: 0 replicas cluster-04: 1 replicas ---------- Add pod-2.cluster-01 in cluster-01 Current distribution: cluster-01: 3 replicas cluster-02: 3 replicas cluster-03: 0 replicas cluster-04: 1 replicas ---------- Remove pod-2.cluster-02 in cluster-02 Current distribution: cluster-01: 3 replicas cluster-02: 2 replicas cluster-03: 0 replicas cluster-04: 1 replicas ---------- Remove pod-2.cluster-04 in cluster-04 Current distribution: cluster-01: 3 replicas cluster-02: 2 replicas cluster-03: 0 replicas cluster-04: 0 replicas ---------- ```