1:集群发现，防止不可用
    PUT _cluster/settings
    {
    “persistent” : {
    “discovery.zen.minimum_master_nodes” : 2
    }
    }

    2：关闭refresh
    PUT /_settings
    {
    “refresh_interval”: -1
    }
    22：打开refresh
    PUT     /_settings
    {
    “refresh_interval”: “30s”
    }

    3:驱逐分片
    PUT _cluster/settings
    {
    “transient”: {
    “cluster.routing.allocation.exclude._name”: [“node-72”,”node-73”,”node-74”] ？？一次设置多个不生效，一个一个停的，为啥？
    }
    }
    33:恢复
    PUT _cluster/settings
    {
    “transient”: {
    “cluster.routing.allocation.exclude._name”: null
    }
    }
    4:调整模板
    _template/k8s_6_shards
    {
    “order”: 1000,
    “index_patterns”: [
    “k8s-*”
    ],
    “settings”: {
    “index”: {
    “number_of_shards”: “6”
    }
    },
    “mappings”: {},
    “aliases”: {}
    }
    5：去除自平衡
    {
    “persistent”: {
    “cluster”: {
    “routing”: {
    “allocation.enable”: “none”
    }
    }
    }
    }
    55：放开
    {
    “persistent”: {
    “cluster”: {
    “routing”: {
    “allocation.enable”: “all”
    }
    }
    }
    }

    6 设置分片模板
    _template/k8s_6_shards
    {
    “order”: 1000,
    “index_patterns”: [
    “k8s-*”
    ],
    “settings”: {
    “index”: {
    “number_of_shards”: “6”
    }
    },
    “mappings”: {},
    “aliases”: {}
    }