elasticsearch -- 安装

Posted on 2019-01-10 15:15 onekey 阅读(620) 评论(0) 编辑收藏举报

Elasticsearch至少需要Java 8.具体到撰写本文时，建议您使用Oracle JDK版本1.8.0_131。Java安装因平台而异，因此我们不会在此处详细介绍。可以在Oracle的网站上找到Oracle推荐的安装文档。可以说，在安装Elasticsearch之前，请先运行检查Java版本（然后根据需要进行相应的安装/升级）：

java -versionecho $ JAVA_HOME

一旦我们设置了Java，我们就可以下载并运行Elasticsearch。文件可以到www.elastic.co/downloads下载。对于每个版本，您可以选择zip或tar存档，DEB或RPM包或包。为简单起见，我们使用tar文件。

1）下载Elasticsearch 5.4.3 tar（Windows用户应该下载zip包）：

curl -L -O https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.4.3.tar.gz

然后按如下方式提取它（Windows用户应该解压缩zip包）：tar -xvf elasticsearch-5.4.3.tar.gz

它会在当前目录中创建一堆文件和文件夹。

2）进入bin目录，如下所示：

cd elasticsearch-5.4.3 / bin

现在我们准备启动我们的节点和单个集群（Windows用户应该运行elasticsearch.bat文件）：

./elasticsearch

如果一切顺利，你应该看到一堆如下所示的消息：

[2016-09-16T14:17:51,251][INFO ][o.e.n.Node ] [] initializing ...

[2016-09-16T14:17:51,329][INFO ][o.e.e.NodeEnvironment ] [6-bjhwl] using [1] data paths, mounts [[/ (/dev/sda1)]], net usable_space [317.7gb], net total_space [453.6gb], spins? [no], types [ext4]

[2016-09-16T14:17:51,330][INFO ][o.e.e.NodeEnvironment ] [6-bjhwl] heap size [1.9gb], compressed ordinary object pointers [true]

[2016-09-16T14:17:51,333][INFO ][o.e.n.Node ] [6-bjhwl] node name [6-bjhwl] derived from node ID; set [node.name] to override

[2016-09-16T14:17:51,334][INFO ][o.e.n.Node ] [6-bjhwl] version[5.4.3], pid[21261], build[f5daa16/2016-09-16T09:12:24.346Z], OS[Linux/4.4.0-36-generic/amd64], JVM[Oracle Corporation/Java HotSpot(TM) 64-Bit Server VM/1.8.0_60/25.60-b23]

[2016-09-16T14:17:51,967][INFO ][o.e.p.PluginsService ] [6-bjhwl] loaded module [aggs-matrix-stats]

[2016-09-16T14:17:51,967][INFO ][o.e.p.PluginsService ] [6-bjhwl] loaded module [ingest-common]

[2016-09-16T14:17:51,967][INFO ][o.e.p.PluginsService ] [6-bjhwl] loaded module [lang-expression]

[2016-09-16T14:17:51,967][INFO ][o.e.p.PluginsService ] [6-bjhwl] loaded module [lang-groovy]

[2016-09-16T14:17:51,967][INFO ][o.e.p.PluginsService ] [6-bjhwl] loaded module [lang-mustache]

[2016-09-16T14:17:51,967][INFO ][o.e.p.PluginsService ] [6-bjhwl] loaded module [lang-painless]

[2016-09-16T14:17:51,967][INFO ][o.e.p.PluginsService ] [6-bjhwl] loaded module [percolator]

[2016-09-16T14:17:51,968][INFO ][o.e.p.PluginsService ] [6-bjhwl] loaded module [reindex]

[2016-09-16T14:17:51,968][INFO ][o.e.p.PluginsService ] [6-bjhwl] loaded module [transport-netty3]

[2016-09-16T14:17:51,968][INFO ][o.e.p.PluginsService ] [6-bjhwl] loaded module [transport-netty4]

[2016-09-16T14:17:51,968][INFO ][o.e.p.PluginsService ] [6-bjhwl] loaded plugin [mapper-murmur3]

[2016-09-16T14:17:53,521][INFO ][o.e.n.Node ] [6-bjhwl] initialized

[2016-09-16T14:17:53,521][INFO ][o.e.n.Node ] [6-bjhwl] starting ...

[2016-09-16T14:17:53,671][INFO ][o.e.t.TransportService ] [6-bjhwl] publish_address {192.168.8.112:9300}, bound_addresses {{192.168.8.112:9300}

[2016-09-16T14:17:53,676][WARN ][o.e.b.BootstrapCheck ] [6-bjhwl] max virtual memory areas vm.max_map_count [65530] likely too low, increase to at least [262144]

[2016-09-16T14:17:56,731][INFO ][o.e.h.HttpServer ] [6-bjhwl] publish_address {192.168.8.112:9200}, bound_addresses {[::1]:9200}, {192.168.8.112:9200}

[2016-09-16T14:17:56,732][INFO ][o.e.g.GatewayService ] [6-bjhwl] recovered [0] indices into cluster_state

[2016-09-16T14:17:56,748][INFO ][o.e.n.Node ] [6-bjhwl] started

3）在不详细讨论的情况下，我们可以看到名为“6-bjhwl”的节点（在您的情况下将是一组不同的字符）已经启动并选择自己作为单个集群中的主节点。现在不要担心掌握意味着什么。这里最重要的是我们在一个集群中启动了一个节点。

如前所述，我们可以覆盖集群或节点名称。这可以在启动Elasticsearch时从命令行完成，如下所示：

./elasticsearch -Ecluster.name = my_cluster_name -Enode.name = my_node_name

另请注意标有http的行，其中包含有关我们的节点可以访问的HTTP地址（192.168.8.112）和端口（9200）的信息。默认情况下，Elasticsearch使用port 9200来提供对其REST API的访问。如有必要，可以配置此端口。

部署elasticsearch常见错误

一、Exception in thread "main" SettingsException[Failed to load settings from [elasticsearch.yml]]; nested: ElasticsearchParseException[malformed, expected settings to start with 'object', instead was [VALUE_STRING]];

原因：elasticsearch.yml文件错误

解决：参数与参数值等号间需要空格

node.name ="node" ##错误

node.name = "node" ##正确

二、org.elasticsearch.bootstrap.StartupException: java.lang.RuntimeException: can not run elasticsearch as root

原因：处于对root用户的安全保护，需要使用其他用户组进行授权启动

解决：

step1:用户组进行授权启动

groupadd elsearch

useradd elsearch -g elsearch -p elasticsearch

chown -R elsearch:elsearch elasticsearch-6.3.0

备注：添加用户组 elsearch

添加用户 elsearch 密码为 elasticsearch 到用户组 elsearch

将elsearch安装目录授权给用户组：用户即 elsearch：elsearch

step2: 重新启动

su elsearch

/elasticsearch-6.3.0/bin/elasticsearch

备注：切换 elsearch 用户

重新启动

三、OpenJDK 64-Bit Server VM warning: INFO: os::commit_memory(0x0000000085330000, 2060255232, 0) failed; error='Cannot a ...'(errno=12);

原因：jvm要分配最大内存超出系统内存

解决：

step1：适当调整指定jvm内存

vi /home/elasticsearch-6.3.0/config/jvm.options

备注：编辑elasticsearch jvm配置文件修改如下 esc+：wq保存退出

## JVM configuration

################################################################

## IMPORTANT: JVM heap size

################################################################

## You should always set the min and max JVM heap

## size to the same value. For example, to set

## the heap to 4 GB, set:

## -Xms4g

## -Xmx4g

## See https://www.elastic.co/guide/en/elasticsearch/reference/current/heap-size.html

## for more information

################################################################

# Xms represents the initial size of total heap space

# Xmx represents the maximum size of total heap space

-Xms512m

-Xmx512m

备注：由于虚拟机内存制定1g，所以适当降低jvm内存指定

step2:重启

su elsearch

/elasticsearch-6.3.0/bin/elasticsearch

四、ERROR: [3] bootstrap checks failed

原因：虚拟机限制用户的执行内存

解决：

[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]

[2]: max number of threads [3802] for user [elsearch] is too low, increase to at least [4096]

step1:修改安全限制配置文件

su root

vi /etc/security/limits.conf

备注：使用最高权限修改安全配置在文件末尾加入

# End of file

elsearch hard nofile 65536

elsearch soft nofile 65536

* soft nproc 4096

* hard nproc 4096

备注： elsearch为用户名可以是使用*进行通配

nofile 最大打开文件数目

nproc 最大打开线程数目

[3]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]

step2:修改系统配置文件

vi /etc/sysctl.conf

备注：行末加上vm.max_map_count = 655360 ，esc +：wq保存退出

# sysctl settings are defined through files in

# /usr/lib/sysctl.d/, /run/sysctl.d/, and /etc/sysctl.d/.

# Vendors settings live in /usr/lib/sysctl.d/.

# To override a whole file, create a new file with the same in

# /etc/sysctl.d/ and put new settings there. To override

# only specific settings, add a file with a lexically later

# name in /etc/sysctl.d/ and put new settings there.

# For more information, see sysctl.conf(5) and sysctl.d(5).

vm.max_map_count = 655360

执行sysctl -p 让配置生效

备注：vm.max_map_count = 655360 值大于错误提示值

step3:重启

su elsearch

/elasticsearch-6.3.0/bin/elasticsearch

五、org.elasticsearch.bootstrap.StartupException: java.lang.IllegalStateException: failed to obtain node locks, tried [[/home/elasticsearch-6.3.0/data/elasticsearch]] with lock id [0]; maybe these locations are not writable or multiple nodes were started without increasing [node.max_local_storage_nodes] (was [1])?

原因：线程占用

解决：重新启动

step1:杀死elasticsearch线程

ps -ef | grep elastic