下載Elasticsearch
mkdir /home/es
cd /home/es
wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-6.0.0.zip
解壓：
unzip elasticsearch-6.0.0.zip
因為是開箱即用，所以不需要安裝
切換到bin目錄下
cd /home/es/elasticsearch6.0.0/bin
執行
./elasticsearch -d (-d是后台運行，如果不輸入，當前Console會被鎖死，不能進行其他操作，執行Ctrl + c，可關閉Elasticsearch;如果執行-d，則無法看見執行的詳細信息)
即可運行
如果需要覆蓋集群或者節點的名字，則在啟動時，添加參數：
./elasticsearch --cluster.name my_cluster_name --node.name my_node_name -d
要檢查集群健康，我們將使用_cat API。需要事先記住的是，我們的節點HTTP的端口是9200：
curl 'localhost:9200/_cat/health?v'
如下：
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[root@localhost ~]# curl 'localhost:9200/_cat/health?v'
epoch timestamp cluster status node.total node.data shards pri relo init unassign pending_tasks max_task_wait_time active_shards_percent
1512571194 22:39:54 elasticsearch green 1 1 0 0 0 0 0 0 - 100.0%
[root@localhost ~]#
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綠色：一切正常（集群功能齊全）
黃色：所有的數據都是可用的，但是某些復制沒有被分配（集群功能是完備的）
紅色：因為某些原因，某些數據不可用。
注意，即使是集群狀態是紅色的，集群仍然是部分可用的（它仍然會利用可用的分片來響應搜索請求），但是可能你需要盡快修復它，因為你有丟失的數據
獲得節集群中的節點列表：
curl 'localhost:9200/_cat/nodes?v'
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[root@localhost ~]# curl 'localhost:9200/_cat/nodes?v'
ip heap.percent ram.percent cpu load_1m load_5m load_15m node.role master name
127.0.0.1 11 96 1 0.00 0.04 0.05 mdi * qnnd6ME
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顯示索引
curl 'localhost:9200/_cat/indices?v'
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[root@localhost ~]# curl 'localhost:9200/_cat/indices?v'
health status index uuid pri rep docs.count docs.deleted store.size pri.store.size
yellow open customer n8UenwhWTr-8Y84WPsU92g 5 1 1 0 4.7kb 4.7kb
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創建索引
curl -XPUT 'localhost:9200/[索引名]?[返回json格式:pretty 美化的格式]'
例如curl -XPUT 'localhost:9200/myindex?pretty'
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[root@localhost ~]# curl -XPUT 'localhost:9200/myindex?pretty'
{
"acknowledged" : true,
"shards_acknowledged" : true,
"index" : "myindex"
}
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插入數據
curl -XPUT 'localhost:9200/[索引名]/[類型名]/[指定id]' -d '{"key":"value","key":"value",...}'
例如：
curl -XPUT 'localhost:9200/myindex/external/1' -d '{"firstName":"John","LastName":"Smith"}'
注意：-d之前，必需要空格！！！！
但是執行之后，出現錯誤：
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[root@localhost ~]# curl -XPUT 'localhost:9200/myindex/external/1' -d '{"firstName":"John","LastName":"Smith"}'
{"error":"Content-Type header [application/x-www-form-urlencoded] is not supported","status":406}[root@localhost ~]#
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格式化輸入依然報錯
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bash-4.2$ curl -XPUT 'localhost:9200/myindex/external/1?pretty' -d '
{
"firstName":"John"
"LastName":"Smith"
}'
{
"error" : "Content-Type header [application/x-www-form-urlencoded] is not supported",
"status" : 406
}
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這個問題，是在報文Content-type的參數：application/x-www-form-urlencoded不支持Json發送。需要改成application/Json
所以需要添加參數 ; -H 'Content-Type: application/json'
:::::Content-Type現有類型不支持JSON等格式傳遞
curl -XPUT 'localhost:9200/myindex/external/1' -H 'Content-Type: application/json' -d '{"firstName":"John","LastName":"Smith"}'
curl -XPUT 'localhost:9200/myindex/external/1?pretty' -H 'Content-Type: application/json' -d '
{
"firstName":"John",
"LastName":"Smith"
}'
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[root@localhost ~]# curl -XPUT 'localhost:9200/myindex/external/1?pretty' -H 'Content-Type: application/json' -d '
> {
> "firstName":"John",
> "LastName":"Smith"
> }'
{
"_index" : "myindex",
"_type" : "external",
"_id" : "1",
"_version" : 1,
"result" : "created",
"_shards" : {
"total" : 2,
"successful" : 1,
"failed" : 0
},
"_seq_no" : 0,
"_primary_term" : 1
}
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取出索引：
curl -XGET 'localhost:9200/myindex/external/1?pretty'
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[root@localhost ~]# curl -XGET 'localhost:9200/myindex/external/1?pretty'
{
"_index" : "myindex",
"_type" : "external",
"_id" : "1",
"_version" : 1,
"found" : true,
"_source" : {
"firstName" : "John",
"LastName" : "Smith"
}
}
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_source部分，就是我們添加的數據
_id是之前添加的索引id
刪除索引 curl -XDELETE 'localhost:9200/myindex?pretty'
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[root@localhost ~]# curl -XDELETE 'localhost:9200/myindex?pretty'
{
"acknowledged" : true
}
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