常用API

查看集群健康状态

curl -s 192.168.1.27:9200/_cluster/health | jq .status

查看集群状态

curl -s 192.168.1.27:9201/_cluster/state | jq

curl -s 192.168.1.27:9201/_cluster/state/nodes | jq

查看集群统计信息

curl -s 192.168.1.27:9201/_cluster/stats | jq

查看集群的设置及优先级

curl -s 192.168.1.27:9201/_cluster/settings

curl -s 192.168.1.27:9201/_cluster/settings?include_defaults=true | jq

修改集群设置

# 修改集群分片分配方式 (all / primaries / new_primaries / none)
curl -X POST 192.168.1.27:9200/_cluster/settings \
  -H "Content-Type: application/json" \
  -d '{
    "transient": {
        "cluster.routing.allocation.enable": "none"
    }
}'

查看集群的分片分配情况

curl 192.168.1.27:9200/_cluster/allocation/explain \
  -H "Content-Type: application/json" \
  -d '{
    "index": "study-01",
    "shard": 0,
    "primary": true
}'

查看集群的分片重路由

curl -X POST 192.168.1.27:9200/_cluster/reroute \
  -H "Content-Type: application/json" \
  -d '{
    {
    "commands": [
        {
            "move": {
                "index": "study-03",
                "shard": 0,
                "from_node": "k8s03",
                "to_node": "k8s01"
            }
        }
    ]
}
}'

取消副本分片的分配，副本分片会重新初始化分配

curl -X POST 192.168.1.27:9200/_cluster/reroute \
  -H "Content-Type: application/json" \
  -d '{
    {
    "commands": [
        {
            "cancel": {
                "index": "study-03",
                "shard": 0,
                "node": "k8s02"
            }
        }
    ]
}
}'