Elasticsearch Combat Series-environment construction

Installing JAVA

Yum Install Java-1.7.0-openjdk-y

Installing Elasticsearch

Elasticsearch only one requirement is to install the latest version of Java. You can download it on the official website: http://www.oracle.com/technetwork/java/javase/downloads/index.html.
You can download it here to the latest version of Elasticsearch:https://www.elastic.co/downloads/elasticsearch.
In writing this article, I elasticsearch the latest version is 2.2.0, followed by 2.2.0 as an example to explain.

[Root@w03 elasticsearch]# curl-l-o https://download.elasticsearch.org/elasticsearch/release/org/elasticsearch/ distribution/tar/elasticsearch/2.2.0/elasticsearch-2.2.0.tar.gz
[root@w03 elasticsearch]# tar zxvf elasticsearch-2.2.0.tar.gz
[root@w03 elasticsearch]# CD elasticsearch-2.2.0

Configure Elasticsearch

[Root@w03 elasticsearch-2.2.0]# VI config/elasticsearch.yml

Remove some of the comments, as shown in the following illustration

Run Elasticsearch
Elasticsearch is ready to run, and now you can do it:

[Root@w03 elasticsearch-2.2.0]#./bin/elasticsearch

If you want to keep it running in the background, you can add a-D to the back of the command.
Once successful, you can use another terminal window to test it.

Curl ' Http://localhost:9200/?pretty '

or enter Http://localhost:9200/?pretty in the browser window, you should see the following prompt after carriage return:

{
  "name": "Node-1",
  "cluster_name": "My-application",
  "version": {
    "number": "2.2.0",
    "build_ Hash ":" 8ff36d139e16f8720f2947ef62c8167a888992fe ","
    Build_timestamp ":" 2016-01-27t13:32:39z ",
    " build_ Snapshot ": false,
    " lucene_version ":" 5.4.1 "
  },
  " tagline ":" You Know, for Search "
}

This means that your Elasticsearch cluster is up and running, so we can do a variety of experiments. Clusters and nodes

A node is an instance of a Elasticsearch run. A cluster is a group of nodes with the same cluster.name that work together to share data with each other, providing the ability to fail over and expand. Of course a node can also be a cluster. Q&a

Linux Root Boot Elasticsearch error

[root@w03 elasticsearch-2.2.0]#./bin/elasticsearch
Exception in thread "main" Java.lang.RuntimeException:don ' t Run Elasticsearch as root.
        At Org.elasticsearch.bootstrap.Bootstrap.initializeNatives (bootstrap.java:93) at
        Org.elasticsearch.bootstrap.Bootstrap.setup (bootstrap.java:144) at
        Org.elasticsearch.bootstrap.Bootstrap.init (bootstrap.java:285) at
        Org.elasticsearch.bootstrap.Elasticsearch.main (elasticsearch.java:35) Refer to the log for complete
error details .

Workaround:

Bin/elasticsearch-des.insecure.allow.root=true