CENTOS7 Virtual Machine Installation elasticsearch5.0.x-installation article

Please install the JDK beforehand Create a new user (non-root user)

Elasticsearch can only be started with a non-root, where I created a user named Seven

[Root@localhost ~]# useradd Seven [root@localhost ~]# passwd-Seven

Download Elasticsearch

[Root@localhost ~]# su seven
[seven@localhost root]$ cd/home/seven [seven@localhost ~]$ mkdir] Download
[ Seven@localhost ~]$ cd Download
[Seven@localhost download]$ wget Release/org/elasticsearch/distribution/tar/elasticsearch/5.0.0-alpha3/elasticsearch-5.0.0-alpha3.tar.gz

Unpack and run Elasticsearch

Extract

[Seven@localhost download]$ TAR-ZXVF elasticsearch-5.0.0-alpha3.tar.gz

Move to a specified folder and rename it (easy to manage)

[Seven@localhost download]$ MV Elasticsearch-5.0.0-alpha3/usr/java/elasticsearch

Modify IP and port access to Elasticsearch

[Seven@localhost config]$ Vim/usr/java/elasticsearch/config/elasticsearch.yml

Locate the following code snippet and cancel the comment on the line network.host and http.port, modify IP and port

#----------------------------------Network-----------------------------------
# # Set The bind address to
a Specific IP (IPV4 or IPV6):
#
network.host:192.168.0.155
#
Set a custom port for http:
#
http. port:9200
#
For more information, and the documentation at:
# 
 
Run Bin/elasticsearch file directly to start Elasticsearch

[Seven@localhost bin]$ cd/usr/java/elasticsearch/bin/
[seven@localhost bin]$./elasticsearch
 
  found an error when starting ...  

[Seven@localhost bin]$./elasticsearch [2016-06-28 13:49:27,899][info][node] [Mondo] Version[5.0.0-a LPHA3], pid[3671], build[cad959b/2016-05-26t08:25:57.564z], os[linux/3.10.0-327.el7.x86_64/amd64], JVM[Oracle                     Corporation/java HotSpot (TM) 64-bit Server vm/1.0_91/25.91-b14]▽2016-06-28 13:49:27,900][info
] [Mondo] initializing ... [2016-06-28 13:49:28,941] [INFO] [Plugins] [Mondo] modules [Percolator, Lang-mustache, lang-painless, Ingest-grok, Reindex, Lang-expression, Lang-groovy], plugins [] [2016-06-28 13:49:28,963][info][env] [Mondo] using [1] data paths, mounts [[/(ROOTFS)]], net us Able_space [15.7GB], net total_space [17.4GB], spins? [Unknown], types [Rootfs] [2016-06-28 13:49:28,963][info][env] [mondo] heap size [1.9GB], Compresse D Ordinary Object pointers [true] [2016-06-28 13:49:31,980][info][node] [mondo] initialized [2016-06 -28 13:49:31,980][INFO] [Node]
[Mondo] Starting ... [2016-06-28 13:49:32,115] [INFO] [Transport] [Mondo] publish_address {192.168.0.155:9300}, bound_addresses {192.168.0.155:9300} Exception in thread ' main ' Java.lang.RuntimeException:bootstrap checks failed initial heap size [268435456] not equal to maximum heap size [21474836 48]; This can cause resize pauses and prevents Mlockall from locking the entire heap max file descriptors [4096] for Elasticsea RCH process likely too low, increase to at least [65536] please set [discovery.zen.minimum_master_nodes] to a majority of The number of master eligible nodes in your cluster max virtual memory areas Vm.max_map_count [65530] likely too low, incr Ease to in least [262144] at Org.elasticsearch.bootstrap.BootstrapCheck.check (bootstrapcheck.java:125) at Org.elasticsearch.bootstrap.BootstrapCheck.check (bootstrapcheck.java:85) at
  Org.elasticsearch.bootstrap.BootstrapCheck.check (bootstrapcheck.java:65)      At Org.elasticsearch.bootstrap.bootstrap$5.validatenodebeforeacceptingrequests (Bootstrap.java:183) at Org.el
        Asticsearch.node.Node.start (node.java:337) at Org.elasticsearch.bootstrap.Bootstrap.start (bootstrap.java:198) At Org.elasticsearch.bootstrap.Bootstrap.init (bootstrap.java:257) at Org.elasticsearch.bootstrap.Elasticsearch . Init (elasticsearch.java:96) at Org.elasticsearch.bootstrap.Elasticsearch.execute (elasticsearch.java:91) A T Org.elasticsearch.cli.SettingCommand.execute (settingcommand.java:54) at Org.elasticsearch.cli.Command.mainWitho Uterrorhandling (command.java:91) at Org.elasticsearch.cli.Command.main (command.java:53) at Org.elasticsear Ch.bootstrap.Elasticsearch.main (elasticsearch.java:70) at Org.elasticsearch.bootstrap.Elasticsearch.main (
ELASTICSEARCH.JAVA:63) refer to the log for complete error details. [2016-06-28 13:49:32,144] [INFO] [Node]
[Mondo] stopping ... [2016-06-28 13:49:32,198][info][node] [Mondo] stopped [2016-06-28 13:49:32,198][info-][node
] [Mondo] closing ... [2016-06-28 13:49:32,210] [INFO] [Node] [Mondo] Closed
 
So I temporarily raised the size of the vm.max_map_count.
* This operation requires root permission

[Root@localhost ~]# sysctl-w vm.max_map_count=262144
 
View Modify Results

[Root@localhost ~]# sysctl-a|grep vm.max_map_count
vm.max_map_count = 262144
 
or permanently modified.

[Root@localhost ~]# cat/etc/sysctl.conf | Grep-v "Vm.max_map_count" >/tmp/system_sysctl.conf
[root@localhost ~]# echo "vm.max_map_count=262144" > >/tmp/system_sysctl.conf
[root@localhost ~]# mv/tmp/system_sysctl.conf/etc/sysctl.conf
mv: Overwrite "/etc/ Sysctl.conf ". Y
[root@localhost ~]# cat/etc/sysctl.conf
# System default Settings Live in/usr/lib/sysctl.d/00-system.conf.< c5/># to override those settings, enter new settings where, or in an/etc/sysctl.d/<name>.conf file
# for
m Ore information, sysctl.conf (5) and SYSCTL.D (5).
vm.max_map_count=262144
[root@localhost ~]# sysctl-p
vm.max_map_count = 262144
 
There's one more error. About JVM memory allocation heap size [268435456] not equal to maximum heap size [2147483648], JVM configuration needs to be modified

[Seven@localhost bin]$ Vim/usr/java/elasticsearch/config/jvm.options
 
Change the-xmx2g to-xmx256m, which is the value of heap size [268435456]/1024/1024

There are new errors in 
  ...  

Exception in thread ' main ' java.lang.RuntimeException:bootstrap checks failed initial heap size [268435456] not equal to Maximum heap size [2147483648]; This can cause resize pauses and prevents Mlockall from locking the entire heap max file descriptors [4096] for Elasticsea RCH process likely too, increase to at least [65536] memory locking requested for elasticsearch process but memory Not locked at Org.elasticsearch.bootstrap.BootstrapCheck.check (bootstrapcheck.java:125) at Org.elasticsear Ch.bootstrap.BootstrapCheck.check (bootstrapcheck.java:85) at Org.elasticsearch.bootstrap.BootstrapCheck.check ( BOOTSTRAPCHECK.JAVA:65) at Org.elasticsearch.bootstrap.bootstrap$5.validatenodebeforeacceptingrequests (Bootstrap . java:183) at Org.elasticsearch.node.Node.start (node.java:337) at Org.elasticsearch.bootstrap.Bootstrap.st Art (bootstrap.java:198) at Org.elasticsearch.bootstrap.Bootstrap.init (bootstrap.java:257) at org.elasticSearch.bootstrap.Elasticsearch.init (elasticsearch.java:96) at Org.elasticsearch.bootstrap.Elasticsearch.execute ( elasticsearch.java:91) at Org.elasticsearch.cli.SettingCommand.execute (settingcommand.java:54) at Org.elas Ticsearch.cli.Command.mainWithoutErrorHandling (command.java:91) at Org.elasticsearch.cli.Command.main ( command.java:53) at Org.elasticsearch.bootstrap.Elasticsearch.main (elasticsearch.java:70) at ORG.ELASTICSE
Arch.bootstrap.Elasticsearch.main (ELASTICSEARCH.JAVA:63) refer to the log for complete error details. [2016-06-28 14:55:49,770] [INFO] [Node]
[Goldbug] stopping ... [2016-06-28 14:55:49,875] [INFO] [Node]
[Goldbug] stopped [2016-06-28 14:55:49,875][info][node] [Goldbug] closing ... [2016-06-28 14:55:49,887] [INFO] [Node] [Goldbug] Closed
 
This problem has been killing me all afternoon, finally found a solution, the same back to config/ ELASTICSEARCH.YML files, find the following configuration, open Discovery.zen.ping.unicast.hosts and Discovery.zen.minimum_master_nodes

#---------------------------------Discovery----------------------------------
# Pass an
initial list of Hosts to perform discovery when new node are started:
# The default list of hosts is ["127.0.0.1", "[:: 1]"]
#
D Iscovery.zen.ping.unicast.hosts: ["192.168.0.155"]
#
prevent the "split brain" by configuring the majority of N Odes (total number of NODES/2 + 1):
#
Discovery.zen.minimum_master_nodes:3
#
For more information, s EE the documentation at:
# 
 
Then modify the max file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536] This error (Switch to root operation)

[Root@localhost ~]# cp/etc/security/limits.conf/etc/security/limits.conf.bak
[root@localhost ~]# cat/etc/ security/limits.conf | Grep-v "Seven" >/tmp/system_limits.conf
[root@localhost ~]# echo "Seven hard nofile 65536" >>/tmp/system_l imits.conf 
[Root@localhost ~]# echo "Seven soft nofile 65536" >>/tmp/system_limits.conf 
[root@localhost ~]# mv/tmp/system_limits.conf/etc/security/limits.conf
 
After modification, log on to the seven user, and use the following command to see if the modification succeeded

[Seven@localhost ~]$ ulimit-hn
65536
 
The next step is to start the Elasticsearch and start the complete use of the browser to access http://192.168.0.155:9200

{
  "name": "Vampire by Night",
  "cluster_name": "Elasticsearch",
  "version": {
    "number": "5.0.0-ALPHA3" , "
    Build_hash": "cad959b",
    "build_date": "2016-05-26t08:25:57.564z",
    "Build_snapshot": false,
    " Lucene_version ":" 6.0.0 "
  },
  " tagline ":" You Know, for Search "
}
 
Finally succeeded, currently only encountered these problems, there are other issues to welcome the exchange.