安装

Elasticsearch需要Java的最低版本的Java 8。在本文写作的时候,推荐使用Oracle JDK 1.8.0_73 版本。Java的安装,在各个平台上都有差异,所以我们不会在这里详细的介绍。在Oracle官网可以找到Oracle的推荐安装文档。我想说的是,在安装Elasticsearch之前,你可以通过以下命令来检查你的Java版本(如果有需要,请安装或者升级):

java -version
echo $JAVA_HOME

一旦Java安装完成, 我们就可以下载并安装 Elasticsearch 了。其二进制文件可以从www.elasticsearch.org/download这里下载,你也可以从这里下载以前发布的版本。对于每个版本,你可以在ziptarDEBRPM类型的包中选择下载。简单起见,我们使用tar包。

让我们通过如下指令开始下载Elasticsearch 5.3.0 tar包(Windows用户可能需要下载zip包)

curl -L -O https://download.elasticsearch.org/elasticsearch/elasticsearch/elasticsearch-1.4.2.tar.gz

使用如下指令解压(Windows用户需要解压zip包)

tar -xvf elasticsearch-5.3.0.tar.gz

然后会在您当前目录中创建一堆文件和文件夹。然后转到 bin 目录中起,如下所示 :

cd elasticsearch-5.3.0/bin

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

./elasticsearch

如果一切顺利,你应该看到一堆看起来像下面的消息:

[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[5.3.0], 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

没有太多的详细信息,我们可以看到一个名称为6-bjhwl(在你的场景中可以不一样)的节点已启动,并且把它选举成主节点组成了一个集群。不用担心什么是主节点,重要的是我们已经在集群中启动了一个节点。

像前面说的那样,我们可以改写节点或集群的名字,可以在启动Elasticsearch的命令行中完成,就像这样:

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

另外需要注意到http那行关于HTTP的地址(192.168.8.112)和端口(9200)信息。默认情况下,Elasticsearch使用9200来提供对其REST API的访问。如果有必要,这个端口是可以配置的。

© ApacheCN Team all right reserved,powered by Gitbook该文件修订于: 2018-03-13 09:41:17

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