Elasticsearch5.5.2 安装教程

最近学习Elasticsearch，顺便记录下操作步骤，供日后参考

安装环境 CentOS release 6.6

1、因Elasticsearch是基于java写的，所以它的运行环境中需要java的支持，在Linux下执行命令：java -version，检查Jar包是否安装

安装java版本至少是1.8以上

2、首先准备下载Elasticsearch5.5.2 安装包

wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.2.2.tar.gz

3、下载到/usr/local 目录下，解压

tar -zxvf  elasticsearch-5.2.2.tar.gz

4、因为Elasticsearch5.0之后，不能使用root账户启动，我们先创建一个elasticsearch组和账户

useradd  elasticsearch -g elasticsearch -p elasticsearch

chown -R elasticsearch:elasticsearch elasticsearch-5.2.2

5、启动elasticsearch

cd /usr/local/elasticsearch5.2.2/

su elasticsearch

./bin/elasticsearch

这时候我们看见下面的提示，说明就成功了

[elasticsearch@vmlnx-sma bin]$ ./elasticsearch
[2017-03-02T21:43:21,185][INFO ][o.e.n.Node               ] [] initializing ...
[2017-03-02T21:43:21,264][INFO ][o.e.e.NodeEnvironment    ] [uY3prpy] using [1] data paths, mounts [[/ (/dev/mapper/VolGroup-lv_root)]], net usable_space [43.5gb], net total_space [54.6gb], spins? [possibly], types [ext4]
[2017-03-02T21:43:21,265][INFO ][o.e.e.NodeEnvironment    ] [uY3prpy] heap size [1.9gb], compressed ordinary object pointers [true]
[2017-03-02T21:43:21,268][INFO ][o.e.n.Node               ] node name [uY3prpy] derived from node ID [uY3prpyqTHim5twauiVWhQ]; set [node.name] to override
[2017-03-02T21:43:21,271][INFO ][o.e.n.Node               ] version[5.2.2], pid[5602], build[f9d9b74/2017-02-24T17:26:45.835Z], OS[Linux/3.10.5-3.el6.x86_64/amd64], JVM[Oracle Corporation/OpenJDK 64-Bit Server VM/1.8.0_121/25.121-b13]
[2017-03-02T21:43:22,226][INFO ][o.e.p.PluginsService     ] [uY3prpy] loaded module [aggs-matrix-stats]
[2017-03-02T21:43:22,226][INFO ][o.e.p.PluginsService     ] [uY3prpy] loaded module [ingest-common]
[2017-03-02T21:43:22,226][INFO ][o.e.p.PluginsService     ] [uY3prpy] loaded module [lang-expression]
[2017-03-02T21:43:22,227][INFO ][o.e.p.PluginsService     ] [uY3prpy] loaded module [lang-groovy]
[2017-03-02T21:43:22,227][INFO ][o.e.p.PluginsService     ] [uY3prpy] loaded module [lang-mustache]
[2017-03-02T21:43:22,227][INFO ][o.e.p.PluginsService     ] [uY3prpy] loaded module [lang-painless]
[2017-03-02T21:43:22,228][INFO ][o.e.p.PluginsService     ] [uY3prpy] loaded module [percolator]
[2017-03-02T21:43:22,228][INFO ][o.e.p.PluginsService     ] [uY3prpy] loaded module [reindex]
[2017-03-02T21:43:22,228][INFO ][o.e.p.PluginsService     ] [uY3prpy] loaded module [transport-netty3]
[2017-03-02T21:43:22,229][INFO ][o.e.p.PluginsService     ] [uY3prpy] loaded module [transport-netty4]
[2017-03-02T21:43:22,230][INFO ][o.e.p.PluginsService     ] [uY3prpy] no plugins loaded
[2017-03-02T21:43:24,689][INFO ][o.e.n.Node               ] initialized
[2017-03-02T21:43:24,689][INFO ][o.e.n.Node               ] [uY3prpy] starting ...
[2017-03-02T21:43:24,929][INFO ][o.e.t.TransportService   ] [uY3prpy] publish_address {10.245.250.65:9300}, bound_addresses {10.245.250.65:9300}
[2017-03-02T21:43:24,948][INFO ][o.e.b.BootstrapChecks    ] [uY3prpy] bound or publishing to a non-loopback or non-link-local address, enforcing bootstrap checks
[2017-03-02T21:43:28,010][INFO ][o.e.c.s.ClusterService   ] [uY3prpy] new_master {uY3prpy}{uY3prpyqTHim5twauiVWhQ}{AqALBH68RCucWcPmHCE6dw}{10.245.250.65}{10.245.250.65:9300}, reason: zen-disco-elected-as-master ([0] nodes joined)
[2017-03-02T21:43:28,034][INFO ][o.e.h.HttpServer         ] [uY3prpy] publish_address {10.245.250.65:9200}, bound_addresses {10.245.250.65:9200}
[2017-03-02T21:43:28,034][INFO ][o.e.n.Node               ] [uY3prpy] started
[2017-03-02T21:43:28,061][INFO ][o.e.g.GatewayService     ] [uY3prpy] recovered [0] indices into cluster_state

执行 curl http://localhost:9200

打开另一个终端进行测试：
curl 'http://localhost:9200/?pretty'

你能看到以下返回信息：

{
   "status": 200,
   "name": "Shrunken Bones",
   "version": {
      "number": "1.4.0",
      "lucene_version": "4.10"
   },
   "tagline": "You Know, for Search"
}

说明安装成功。

但是我们希望能够使用ip访问，那么还需要设置相关内容

跳转到Elasticsearch的config配置文件下，使用vim打开elasticsearch.yml，找到里面的"network.host",将其改为本机IP,保存。

cd elasticsearch/config/

vim elasticsearch.yml

重启ElasticSearch，然后使用http://192.168.37.137:9200/访问。

我们常见错误：

问题一：警告提示

[2016-11-06T16:27:21,712][WARN ][o.e.b.JNANatives ] unable to install syscall filter: 

java.lang.UnsupportedOperationException: seccomp unavailable: requires kernel 3.5+ with CONFIG_SECCOMP and CONFIG_SECCOMP_FILTER compiled in
at org.elasticsearch.bootstrap.Seccomp.linuxImpl(Seccomp.java:349) ~[elasticsearch-5.0.0.jar:5.0.0]
at org.elasticsearch.bootstrap.Seccomp.init(Seccomp.java:630) ~[elasticsearch-5.0.0.jar:5.0.0]

报了一大串错误，其实只是一个警告。

解决：使用心得linux版本，就不会出现此类问题了。

 

问题二：ERROR: bootstrap checks failed

max file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536]
max number of threads [1024] for user [lishang] likely too low, increase to at least [2048]

解决：切换到root用户，编辑limits.conf 添加类似如下内容

vi /etc/security/limits.conf 

添加如下内容:

* soft nofile 65536

* hard nofile 131072

* soft nproc 2048

* hard nproc 4096

 

问题三：max number of threads [1024] for user [lish] likely too low, increase to at least [2048]

解决：切换到root用户，进入limits.d目录下修改配置文件。

vi /etc/security/limits.d/90-nproc.conf 

修改如下内容：

* soft nproc 1024

#修改为

* soft nproc 2048

 

问题四：max virtual memory areas vm.max_map_count [65530] likely too low, increase to at least [262144]

解决：切换到root用户修改配置sysctl.conf

vi /etc/sysctl.conf 

添加下面配置：

vm.max_map_count=655360

并执行命令：

sysctl -p

然后，重新启动elasticsearch，即可启动成功。