ES集群

概念

安装配置

# 安装java环境
sudo apt-get update
sudo apt-get install openjdk-8-jdk
# 配置环境变量
sudo bash -c 'echo "export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64" >> /etc/profile'
sudo bash -c "source /etc/profile"
# 下载elasticsearch
sudo wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.4.1.zip
sudo unzip elasticsearch-5.4.1.zip
# 修改配置
# 2g默认jvm运行内存,按实际情况修改
sudo sed -i 's/Xms2g/Xms1g/g' elasticsearch-5.4.1/config/jvm.options
sudo sed -i 's/Xmx2g/Xmx1g/g' elasticsearch-5.4.1/config/jvm.options
sudo sed -i 's/^\#network.host.*/network.host:\ 0.0.0.0/g'  elasticsearch-5.4.1/config/elasticsearch.yml
sudo bash -c "echo 'vm.max_map_count=262144' >> /etc/sysctl.conf"
sudo sysctl -p
# 开放端口
sudo ufw allow 9200
# 添加用户和用户组
sudo groupadd elsearch
sudo useradd -g elsearch elsearch
# 改变目录权限
sudo chown -R elsearch:elsearch elasticsearch-5.4.1
# 以elsearch用户启动
sudo su - elsearch -c elasticsearch-5.4.1/bin/elasticsearch

　　

# 集群配置

/usr/local/elasticsearch-5.4.1/bin/elasticsearch -Epath.conf=/usr/local/elasticsearch-5.4.1/config/config-master-02 -d

　　

# _cat API 查看集群状态
curl -v -XGET http://localhost:9200/_cat/
# 创建索引
curl -v -XPUT http://localhost:9200/customer
# 查看索引
curl -v XGET　http://localhost:9200/_cat/indices?v
# 指定id写入数据
curl -v -XPUT http://localhost:9200/customer/external/1 -d '{"name" : "owlsn"}'
# 查询数据
curl -v -XGET http://localhost:9200/customer/external/1?pretty
# 不指定id写入
curl -v -XPOST http://localhost:9200/customer/external -d '{"name" : "owlsn"}'
# 更新数据
curl -v -XPOST http://localhost:9200/customer/external/1/_update -d '{"doc":{"name" : "owlsn"}}'
# 删除索引
curl -v -XDELETE http://localhost:9200/customer
# restful API 格式
<REST Verb> /<Index>/<Type>/<ID>
# bulk API 批量操作
curl -v -XPOST http://localhost:9200/customer/external/_bulk -d '
{"update":{"_id":1}}
{"doc":{"name":"test"}}
{"delete":{"_id":1}}'

　　

#  

参考资料

　　Elasticsearch: 权威指南