es系列-es的安装

1.下载：https://www.elastic.co/cn/downloads/elasticsearch

2.上传到服务器并解压

3.目录结构

• bin：可执行文件
• config：配置文件目录
• JDK：java环境
• lib：依赖的jar包，类库
• logs：日志文件
• modules：es的相关模块
• plugins：可以自己开发的插件

4. 在config目录下修改核心配置文件elasticearch.yml

# Use a descriptive name for your cluster:
# 集群的名称
cluster.name: my_es
#
# ------------------------------------ Node ------------------------------------
#
# Use a descriptive name for the node:
# 节点的名称 
node.name: my_node1
#
# Add custom attributes to the node:
#
#node.attr.rack: r1
#
# ----------------------------------- Paths ------------------------------------
#
# Path to directory where to store the data (separate multiple locations by comma):
# 数据的路径需要自己创建在es的目录下
path.data: /usr/local/elasticsearch-7.4.2/data
#
# Path to log files:
# 日志路径
path.logs: /usr/local/elasticsearch-7.4.2/logs
#
# ---------------------------------- Network -----------------------------------
#
# Set the bind address to a specific IP (IPv4 or IPv6):
# 
network.host: 0.0.0.0
#
# Set a custom port for HTTP:
#
#http.port: 9200
#
# For more information, consult the network module documentation.
#
# Pass an initial list of hosts to perform discovery when this node is started:
# The default list of hosts is ["127.0.0.1", "[::1]"]
#
#discovery.seed_hosts: ["host1", "host2"]
#
# Bootstrap the cluster using an initial set of master-eligible nodes:
#
cluster.initial_master_nodes: ["my_node1"]
#
# For more information, consult the discovery and cluster formation module documentation.
#

4. 添加用户

由于es是不允许root来操作的所以我们需要添加用户,并且赋予权限

useradd esuser
chown -R esuser:esuser /usr/local/elasticsearch-7.4.2
su esuser

5. 启动es

执行bin目录下的脚本文件

./elasticsearch

# 后台运行
./elasticsearch -d

注意：如果在运行的过程中报如下错误

1.

vim /etc/security/limit.conf
* soft nofile 65536
* hard nofile 131072
* soft nproc 2048
* hard nproc 4096

vim /etc/sysctl.conf
vm.max_map_count=26215
# 刷新
sysctl -p

6. 测试

如图则ok，访问9200端口：http://ip:9200/