centos7虛擬機安裝elasticsearch5.0.x-安裝篇
請預先安裝jdk
創建新用戶（非root用戶）
elasticsearch只能用非root啟動，這里我創建了一個叫seven的用戶
[root@localhost ~]# useradd seven[root@localhost ~]# passwd seven
下載elasticsearch
[root@localhost ~]# su seven[seven@localhost root]$ cd /home/seven[seven@localhost ~]$ mkdir download[seven@localhost ~]$ cd download[seven@localhost download]$ wget https://download.elastic.co/elasticsearch/release/org/elasticsearch/distribution/tar/elasticsearch/5.0.0-alpha3/elasticsearch-5.0.0-alpha3.tar.gz
解壓并運行elasticsearch
解壓
[seven@localhost download]$ tar -zxvf elasticsearch-5.0.0-alpha3.tar.gz
移動到指定文件夾并重命名（方便管理）
[seven@localhost download]$ mv elasticsearch-5.0.0-alpha3 /usr/java/elasticsearch
修改訪問elasticsearch的IP及端口
[seven@localhost config]$ vim /usr/java/elasticsearch/config/elasticsearch.yml
找到如下代碼段，并取消network.host及http.port所在行的注釋，修改IP及端口
# ---------------------------------- 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, see the documentation at:# <http://www.elastic.co/guide/en/elasticsearch/reference/current/modules-network.html>
直接運行bin/elasticsearch文件啟動elasticsearch
[seven@localhost bin]$ cd /usr/java/elasticsearch/bin/[seven@localhost bin]$ ./elasticsearch
啟動時發現報錯了。。。
[seven@localhost bin]$ ./elasticsearch[2016-06-28 13:49:27,899][INFO ][node ] [Mondo] version[5.0.0-alpha3], 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 ][node ] [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 usable_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], compressed 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 failedinitial heap size [268435456] not equal to maximum heap size [2147483648]; this can cause resize pauses and prevents mlockall from locking the entire heapmax file descriptors [4096] for elasticsearch 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 clustermax virtual memory areas vm.max_map_count [65530] likely too low, increase to at 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$5.validateNodeBeforeAcceptingRequests(Bootstrap.java:183) at org.elasticsearch.node.Node.start(Node.java:337) at org.elasticsearch.bootstrap.Bootstrap.start(Bootstrap.java:198) at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:257) at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:96) at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:91) at org.elasticsearch.cli.SettingCommand.execute(SettingCommand.java:54) at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:91) at org.elasticsearch.cli.Command.main(Command.java:53) at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:70) at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:63)Refer to the log for complete error details.[2016-06-28 13:49:32,144][INFO ][node ] [Mondo] stopping ...[2016-06-28 13:49:32,198][INFO ][node ] [Mondo] stopped[2016-06-28 13:49:32,198][INFO ][node ] [Mondo] closing ...[2016-06-28 13:49:32,210][INFO ][node ] [Mondo] closed于是我臨時提高了vm.max_map_count的大小
*此操作需要root權限
[root@localhost ~]# sysctl -w vm.max_map_count=262144
查看修改結果
[root@localhost ~]# sysctl -a|grep vm.max_map_countvm.max_map_count = 262144
或者永久性修改
[root@localhost ~]# cat /etc/sysctl.conf | grep -v "vm.max_map_count" > /tmp/system_sysctl.conf[root@localhost ~]# echo "vm.max_map_count=262144" >> /tmp/system_sysctl.conf[root@localhost ~]# mv /tmp/system_sysctl.conf /etc/sysctl.confmv：是否覆蓋"/etc/sysctl.conf"？ y[root@localhost ~]# cat /etc/sysctl.conf# System default settings live in /usr/lib/sysctl.d/00-system.conf.# To override those settings, enter new settings here, or in an /etc/sysctl.d/<name>.conf file## For more information, see sysctl.conf(5) and sysctl.d(5).vm.max_map_count=262144[root@localhost ~]# sysctl -pvm.max_map_count = 262144
上面還有一個錯誤是關于jvm內存分配的問題heap size [268435456] not equal to maximum heap size [2147483648]，需要修改的jvm配置
[seven@localhost bin]$ vim /usr/java/elasticsearch/config/jvm.options
將-Xmx2g改成-Xmx256m，也就是heap size [268435456] /1024/1024的值
又有新的錯誤。。。
Exception in thread "main" java.lang.RuntimeException: bootstrap checks failedinitial heap size [268435456] not equal to maximum heap size [2147483648]; this can cause resize pauses and prevents mlockall from locking the entire heapmax file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536]memory locking requested for elasticsearch process but memory is not locked 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.elasticsearch.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) at org.elasticsearch.cli.SettingCommand.execute(SettingCommand.java:54) at org.elasticsearch.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.elasticsearch.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
這個問題折騰了我一下午，最后還是找到了解決方案，同樣回到config/elasticsearch.yml文件，找到如下配置，開放discovery.zen.ping.unicast.hosts及discovery.zen.minimum_master_nodes
# --------------------------------- Discovery ----------------------------------## Pass an initial list of hosts to perform discovery when new node is started:# The default list of hosts is ["127.0.0.1", "[::1]"]#discovery.zen.ping.unicast.hosts: ["192.168.0.155"]## Prevent the "split brain" by configuring the majority of nodes (total number of nodes / 2 + 1):#discovery.zen.minimum_master_nodes: 3## For more information, see the documentation at:# <http://www.elastic.co/guide/en/elasticsearch/reference/current/modules-discovery.html>
然后修改max file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536]這個錯誤（切換到root操作）
[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_limits.conf [root@localhost ~]# echo "seven soft nofile 65536" >> /tmp/system_limits.conf [root@localhost ~]# mv /tmp/system_limits.conf /etc/security/limits.conf
修改后重新登錄seven用戶，使用如下命令查看是否修改成功
[seven@localhost ~]$ ulimit -Hn65536
接下來就可以啟動elasticsearch了，啟動完成使用瀏覽器訪問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"}以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持VEVB武林網。
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