Elasticsearch 安装
Install Elasticsearch with Debian Package
- for Debian, Ubuntu, and other Debian-based systems
- 需要java环境，请自行安装
-
官方参考资料：https://www.elastic.co/guide/en/elasticsearch/reference/current/deb.html#deb-key
-
其他版本系统参考资料：https://www.elastic.co/guide/en/elasticsearch/reference/current/install-elasticsearch.html
步骤
- 下载并安装公共签名密钥
<pre><code>
wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add -
</code></pre>
- 你可能需要在Debian安装apt-transport-https:
<pre><code>
sudo apt-get install apt-transport-https
</code></pre>
- 将 repository 保存到 /etc/apt/sources.list.d/elastic-5.x.list
<pre><code>
echo "deb https://artifacts.elastic.co/packages/5.x/apt stable main" | sudo tee -a /etc/apt/sources.list.d/elastic-5.x.list
</code></pre>
- 你可以安装 Debian package Elasticsearch,命令如下:
<pre><code>
sudo apt-get update && sudo apt-get install elasticsearch
</code></pre>
- Elasticsearch v5.4.2 Debian 软件包可以从网站上下载并安装:
<pre><code>
wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.4.2.deb
sha1sum elasticsearch-5.4.2.deb
sudo dpkg -i elasticsearch-5.4.2.deb
</code></pre>
- 配置Elasticsearch随系统启动，运行下面的命令:
<pre><code>
sudo /bin/systemctl daemon-reload
sudo /bin/systemctl enable elasticsearch.service
</code></pre>
- Elasticsearch可以按照如下方式启动和停止:
<pre><code>
sudo systemctl start elasticsearch.service
sudo systemctl stop elasticsearch.service
</code></pre>
当系统启用了日志记录，日志记录的信息都可以用journalctl命令:
- To tail the journal:
<pre><code>
sudo journalctl -f
</code></pre>
- To list journal entries for the elasticsearch service:
<pre><code>
sudo journalctl --unit elasticsearch
</code></pre>
- To list journal entries for the elasticsearch service starting from a given time:
<pre><code>
sudo journalctl --unit elasticsearch --since "2016-10-30 18:17:16"
</code></pre>
- 我的机器是阿里云1c 1G的,启动的时候就报出如下错误
<pre><code>
Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x0000000085330000, 2060255232, 0) failed; error='Cannot alloc
There is insufficient memory for the Java Runtime Environment to continue.
Native memory allocation (mmap) failed to map 2060255232 bytes for committing reserved memory.
</code></pre>
- 根据机器配置不同可以修改相对应的参数
<pre><code>
vi /etc/elasticsearch/jvm.options
</code></pre>
-
将 -Xms 和 -Xmx 参数修改一下就可以正常启动了
<pre><code>
-Xms256m
-Xmx256m
</code></pre> -
默认参数是运行在9200端口下的,可以通过如下命令确认:
<pre><code>
curl -XGET 'localhost:9200/?pretty'
</code></pre> -
返回结果如下
<pre><code>
{
"name" : "0NcYzNP",
"cluster_name" : "elasticsearch",
"cluster_uuid" : "-QmXkqg6T0uVrUAbNZhggA",
"version" : {
"number" : "5.4.2",
"build_hash" : "929b078",
"build_date" : "2017-06-15T02:29:28.122Z",
"build_snapshot" : false,
"lucene_version" : "6.5.1"
},
"tagline" : "You Know, for Search"
}
</code></pre>
配置Elasticsearch
-
Elasticsearch 的默认加载配置路径： /etc/elasticsearch/elasticsearch.yml .
-
配置的详细解释可以参考官方文档： https://www.elastic.co/guide/en/elasticsearch/reference/current/settings.html
-
Debian package 也有一个配置文件 (/etc/default/elasticsearch), 允许你配置如下参数:
| 参数 | 注释 |
|---|---|
| ES_USER | The user to run as, defaults to elasticsearch |
| ES_GROUP | The group to run as, defaults to elasticsearch |
| JAVA_HOME | Set a custom Java path to be used |
| MAX_OPEN_FILES | Maximum number of open files, defaults to 65536 |
| MAX_LOCKED_MEMORY | Maximum locked memory size. Set to unlimited if you use the bootstrap.memory_lock option in elasticsearch.yml |
| MAX_MAP_COUNT | Maximum number of memory map areas a process may have. If you use mmapfs as index store type, make sure this is set to a high value. For more information, check the linux kernel documentation about max_map_count. This is set via sysctl before starting elasticsearch. Defaults to 262144 |
| LOG_DIR | Log directory, defaults to /var/log/elasticsearch |
| DATA_DIR | Data directory, defaults to /var/lib/elasticsearch |
| CONF_DIR | Configuration file directory (which needs to include elasticsearch.yml and log4j2.properties files), defaults to /etc/elasticsearch |
| ES_JAVA_OPTS | Any additional JVM system properties you may want to apply |
| RESTART_ON_UPGRADE | Configure restart on package upgrade, defaults to false. This means you will have to restart your elasticsearch instance after installing a package manually. The reason for this is to ensure, that upgrades in a cluster do not result in a continuous shard reallocation resulting in high network traffic and reducing the response times of your cluster |
- The Debian package places config files, logs, and the data directory in the appropriate locations for a Debian-based system
https://www.elastic.co/guide/en/elasticsearch/reference/current/deb.html#deb-layout
| Type | Description | Default Location | Setting |
|---|---|---|---|
| home | Elasticsearch home directory or $ES_HOME | /usr/share/elasticsearch | |
| bin | Binary scripts including elasticsearch to start a node and elasticsearch-plugin to install plugins | /usr/share/elasticsearch/bin | |
| conf | Configuration files including elasticsearch.yml | /etc/elasticsearch | path.conf |
| conf | Environment variables including heap size, file descriptors | /etc/default/elasticsearch | |
| data | The location of the data files of each index / shard allocated on the node. Can hold multiple locations. | /var/lib/elasticsearch | path.data |
| logs | Log files location. | /var/log/elasticsearch | path.logs |
| plugins | Plugin files location. Each plugin will be contained in a subdirectory. | /usr/share/elasticsearch/plugins | |
| repo | Shared file system repository locations. Can hold multiple locations. A file system repository can be placed in to any subdirectory of any directory specified here. | Not configured | path.repo |
| script | Location of script files. | /etc/elasticsearch/scripts | path.scripts |
