elasticsearch集群布署

官网下载elasticsearch：

https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.8.1-linux-x86_64.tar.gz

解压缩包后配置jdk环境：

cd elasticsearch-7.8.1

mv jdk /usr/local/

mkdir /data/elasticsearch/{data,logs} -p

添加java环境系统配置：

echo "export JAVA_HOME=/usr/local/jdk" >> /etc/profile

echo "export CLASSPATH=\$JAVA_HOME/lib:\$CLASSPATH" >> /etc/profile

echo "export PATH=\$JAVA_HOME/bin:\$PATH" >> /etc/profile

系统内核配置：

echo "vm.max_map_count = 655300" >>/etc/sysctl.conf sysctl -p cat>>/etc/security/limits.conf< *       soft    nproc                   655350 *       hard    nproc                   655350 *       soft    nofile                  655350 *       hard    nofile                  655350 EOF ulimit -n 655350

 

使环境配置生效：

source /etc/profile

chmod 755 -R /usr/local/jdk

useradd elastic

chown elastic:elastic /usr/local/elasticsearch -R

chown elastic:elastic /data/elasticsearch –R

各节点修改elasticsearch.yml配置文件如下：

节点1：

cluster.name: my-application node.name: node-1 path.data: /data/elasticsearch/data path.logs: /data/elasticsearch/logs network.host: 192.168.199.140 http.port: 9200 discovery.seed_hosts: ["192.168.199.140", "192.168.199.141","192.168.199.142"] cluster.initial_master_nodes: ["192.168.199.140", "192.168.199.141","192.168.199.142"]

节点2：

cluster.name: my-application node.name: node-2 path.data: /data/elasticsearch/data path.logs: /data/elasticsearch/logs network.host: 192.168.199.141 http.port: 9200 discovery.seed_hosts: ["192.168.199.140", "192.168.199.141","192.168.199.142"] cluster.initial_master_nodes: ["192.168.199.140", "192.168.199.141","192.168.199.142"]

节点3：

cluster.name: my-application node.name: node-3 path.data: /data/elasticsearch/data path.logs: /data/elasticsearch/logs network.host: 192.168.199.142 http.port: 9200 discovery.seed_hosts: ["192.168.199.140", "192.168.199.141","192.168.199.142"] cluster.initial_master_nodes: ["192.168.199.140", "192.168.199.141","192.168.199.142"]

切换至elastic用户启动elasticsearch集群：

su - elastic

/usr/local/elasticsearch/bin/elasticsearch -d

查看集群健康状况：

http://192.168.199.140:9200/_cat/health?v

 

查看集群节点详细信息：

http://192.168.199.140:9200/_cat/nodes?v

 

 

每个命令都支持使用?v参数，来显示详细的信息。

help

每个命令都支持使用help参数，来输出可以显示的列：

$ curl localhost:9200/_cat/master?help

 

headers

通过h参数，可以指定输出的字段：

$ curl localhost:9200/_cat/master?v

$ curl localhost:9200/_cat/master?h=ip,node

 

 

查看_cat下可用命令：

http://192.168.199.140:9200/_cat，返回如下：

=^.^= /_cat/allocation /_cat/shards /_cat/shards/{index} /_cat/master /_cat/nodes /_cat/tasks /_cat/indices /_cat/indices/{index} /_cat/segments /_cat/segments/{index} /_cat/count /_cat/count/{index} /_cat/recovery /_cat/recovery/{index} /_cat/health /_cat/pending_tasks /_cat/aliases /_cat/aliases/{alias} /_cat/thread_pool /_cat/thread_pool/{thread_pools} /_cat/plugins /_cat/fielddata /_cat/fielddata/{fields} /_cat/nodeattrs /_cat/repositories /_cat/snapshots/{repository} /_cat/templates /_cat/ml/anomaly_detectors /_cat/ml/anomaly_detectors/{job_id} /_cat/ml/trained_models /_cat/ml/trained_models/{model_id} /_cat/ml/datafeeds /_cat/ml/datafeeds/{datafeed_id} /_cat/ml/data_frame/analytics /_cat/ml/data_frame/analytics/{id} /_cat/transforms /_cat/transforms/{transform_id}

 

更多请参考官方文档：

https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html