elasticSearch在linux上配置和安装

第一步:安装java环境

第二步:下载.解压和安装必须要在非root用户下,如果不是,启动的时候会报错can not run elasticsearch as root”

第三步:进入bin下面运行,发现如下问题

Exception in thread "main" java.nio.file.AccessDeniedException: /home/ubuntu/elasticsearch-6.5.4/config/jvm.options
	at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:90)
	at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)
	at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:116)
	at java.base/sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:215)
	at java.base/java.nio.file.Files.newByteChannel(Files.java:369)
	at java.base/java.nio.file.Files.newByteChannel(Files.java:415)
	at java.base/java.nio.file.spi.FileSystemProvider.newInputStream(FileSystemProvider.java:384)
	at java.base/java.nio.file.Files.newInputStream(Files.java:154)
	at org.elasticsearch.tools.launchers.JvmOptionsParser.main(JvmOptionsParser.java:60)

解决:

vim ../config/elasticsearch.yml

修改如下配置:
cluster.name: Test
node.name: Test-node-1
network.host: 0.0.0.0
http.port: 9200
cluster.initial_master_nodes: ["Test-node-1"]

再次运行会出现一下错误:
[1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
解决:

切换root角色,打开如下文件:
vim /etc/security/limits.conf

添加一下内容设置文件描述符:
elasticsearch soft nofile 65536
elasticsearch hard nofile 65536
elasticsearch soft nproc 4096
elasticsearch hard nproc 4096

打开:
vim /etc/sysctl.conf

添加设置virtual memory:
vm.max_map_count=262144

保存后执行:
sysctl -p

配置线程可创建个数(可以不配置)
vim /etc/sysctl.conf
vm.nproc=4096
保存后执行:
sysctl -p

第四步,后台运行

elasticsearch -d -p Test.pid

第五步:测试

http://localhost:9200/?pretty
{
"name": "Test-node-1",
"cluster_name": "Test",
"cluster_uuid": "O4Gt_F_qTB2tIExn4H7QUQ",
"version": {
"number": "7.0.0",
"build_flavor": "default",
"build_type": "tar",
"build_hash": "b7e28a7",
"build_date": "2019-04-05T22:55:32.697037Z",
"build_snapshot": false,
"lucene_version": "8.0.0",
"minimum_wire_compatibility_version": "6.7.0",
"minimum_index_compatibility_version": "6.0.0-beta1"
},
"tagline": "You Know, for Search"
}

第六步,停止运行

kill -9 $(cat ../Test.pid)