一、全集群重启步骤

1. 禁用分片分配

在关闭数据节点前，需禁用副本分片的分配，避免不必要的 I/O 操作。通过以下命令将分片分配限制为仅主分片：

resp = client.cluster.put_settings(
    persistent={
        "cluster.routing.allocation.enable": "primaries"
    }
)
print(resp)

response = client.cluster.put_settings(
    body: {
        persistent: {
            'cluster.routing.allocation.enable' => 'primaries'
        }
    }
)
puts response

const response = await client.cluster.putSettings({
    persistent: {
        "cluster.routing.allocation.enable": "primarie