Elasticsearch-5.2.2 stand-alone installation, deployment steps and various pitfalls and solutions

1. Prepare relevant installation file packages

Download Elasticsearch address: https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.2.2.tar.gz

Download Kibana:

https://artifacts.elastic.co/downloads/kibana/kibana-5.2.2-linux-x86_64.tar.gz

2. Install Elasticsearch

1. Unzip the Elasticsearch installation package tar -zxvf elasticsearch-5.2.2.tar.gz

2. Execute ./elasticsearch in the decompressed folder. The error is as follows

[2017-01-14T18:35:29,164][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [] uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: java.lang.RuntimeException: can not run elasticsearch as root
    at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:125) ~[elasticsearch-5.1.2.jar:5.1.2]
    at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:112) ~[elasticsearch-5.1.2.jar:5.1.2]
    at org.elasticsearch.cli.SettingCommand.execute(SettingCommand.java:54) ~[elasticsearch-5.1.2.jar:5.1.2]
    at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:122) ~[elasticsearch-5.1.2.jar:5.1.2]
    at org.elasticsearch.cli.Command.main(Command.java:88) ~[elasticsearch-5.1.2.jar:5.1.2]
    at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:89) ~[elasticsearch-5.1.2.jar:5.1.2]
    at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:82) ~[elasticsearch-5.1.2.jar:5.1.2]
Caused by: java.lang.RuntimeException: can not run elasticsearch as root
    at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:100) ~[elasticsearch-5.1.2.jar:5.1.2]
    at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:176) ~[elasticsearch-5.1.2.jar:5.1.2]
    at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:306) ~[elasticsearch-5.1.2.jar:5.1.2]
    at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:121) ~[elasticsearch-5.1.2.jar:5.1.2]
    ... 6 more

Reason: Elasticsearch must be started using a non-root account 

Solution: Create a dedicated account for Elasticsearch

1. Create a user group

groupadd elsearch

2Create user

useradd elsearch -g elsearch -p elasticsearch

3. Change elasticsearch-5.2.2 the user and group belonging to the folder and internal files to elsearch:elsearch

chown -R elsearch:elsearch /data/www/search/es/elasticsearch-5.2.2

Switch to the elsearch user to execute and startelasticsearch

stop elasticsearch

Modify the configuration file elasticsearch.yml

cluster.name: es522

node.name: node

network.host: 192.168.1.1

http.port: 9200

 After multiple startups, elasticsearch cannot be started due to the limit on the number of files occupied by each thread after startup. The error is reported as follows.

ERROR: bootstrap checks failed
max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
[2017-01-14T18:50:27,955][INFO ][o.e.n.Node               ] [node-3] stopping ...
[2017-01-14T18:50:27,965][INFO ][o.e.n.Node               ] [node-3] stopped
[2017-01-14T18:50:27,965][INFO ][o.e.n.Node               ] [node-3] closing ...
[2017-01-14T18:50:27,977][INFO ][o.e.n.Node               ] [node-3] closed

Solution:

Modify the number of files

vi /etc/sysctl.conf

vm.max_map_count=655360

fs.file-max = 6815744

and execute the command:

sysctl -p

Modify file limits and process limits

vi /etc/security/limits.conf

* soft nofile 65536

* hard nofile 131072

* soft nproc 2048

* hard nproc 4096

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

Modify the following content:

* soft nproc 1024

#change into

* soft nproc 2048

 3. Start again after modifying the above configuration information.

Access to the console without error message output

http://192.168.1.1:9200/

The following message appears, indicating that the ES installation is successful;

{
  "name" : "node1",
  "cluster_name" : "es522",
  "cluster_uuid" : "MnQRBEqvQN-Qz6k84bj3Eg",
  "version" : {
    "number" : "5.2.2",
    "build_hash" : "f9d9b74",
    "build_date" : "2017-02-24T17:26:45.835Z",
    "build_snapshot" : false,
    "lucene_version" : "6.4.1"
  },
  "tagline" : "You Know, for Search"
}

3. Install Kibana

1. Unzip the Elasticsearch installation package tar -zxvf kibana-5.2.2-linux-x86_64.tar.gz

2. Modify the configuration file and add the following three configuration information

server.port: 5601
server.name: "es522"
elasticsearch.url: "http://192.168.1.1:9200"

3. Start Kibana (add & code at the end of the command to start in the background. If not added, the current window will start, the window will close, and the service will stop)

/bin/child &

 After successful startup, visit http://192.168.1.1:5601

 Kibana is installed successfully!