Linux安装Elasticsearch7.x

Elasticsearch下载地址：

https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-7.1.1-linux-x86_64.tar.gz

解压elasticsearch-7.1.1-linux-x86_64.tar.gz到/usr/local/目录：

tar -avxf elasticsearch-7.1.1-linux-x86_64.tar.gz -C /usr/local/

进入解压后的elasticsearch目录：
（1）新建data目录：

mkdir data

（2）修改config/elasticsearch.yml：

vim config/elasticsearch.yml

取消下列项注释并修改：

cluster.name: my-application #集群名称
node.name: node-1 #节点名称
#数据和日志的存储目录
path.data: /usr/local/elasticsearch-7.1.1/data
path.logs: /usr/local/elasticsearch-7.1.1/logs
#设置绑定的ip，设置为0.0.0.0以后就可以让任何计算机节点访问到了
network.host: 0.0.0.0
http.port: 9200 #端口
#设置在集群中的所有节点名称，这个节点名称就是之前所修改的，当然你也可以采用默认的也行，目前是单机，放入一个节点即可
cluster.initial_master_nodes: ["node-1"]

修改完毕后，:wq 保存退出vim

准备启动es
进入/bin目录执行命令：

./elasticsearch

我这里出现如下错误：

Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00000000c5330000, 986513408, 0) failed; error='Cannot allocate memory' (errno=12)
#
# There is insufficient memory for the Java Runtime Environment to continue.
# Native memory allocation (mmap) failed to map 986513408 bytes for committing reserved memory.
# An error report file with more information is saved as:
# logs/hs_err_pid22863.log

[root@VM_0_2_centos bin]#
看来是我这1G的内存太小了啊，elasticsearch使用java的jvm默认是使用1G的内存的，这里我们修改一下内存，直接把内存改到200m
cd 到es目录修改 ./config/jvm.options：

vim ./config/jvm.options 

修改该内容：

-Xms200m
-Xmx200m

:wq 保存并退出vim，再次启动es

再次启动出现如下错误：

[2019-06-21T16:20:03,039][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [node-1] 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:163) ~[elasticsearch-7.1.1.jar:7.1.1]
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:150) ~[elasticsearch-7.1.1.jar:7.1.1]
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-7.1.1.jar:7.1.1]
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-7.1.1.jar:7.1.1]
at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-7.1.1.jar:7.1.1]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:115) ~[elasticsearch-7.1.1.jar:7.1.1]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) ~[elasticsearch-7.1.1.jar:7.1.1]
Caused by: java.lang.RuntimeException: can not run elasticsearch as root
at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:102) ~[elasticsearch-7.1.1.jar:7.1.1]
at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:169) ~[elasticsearch-7.1.1.jar:7.1.1]
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:325) ~[elasticsearch-7.1.1.jar:7.1.1]
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:159) ~[elasticsearch-7.1.1.jar:7.1.1]
... 6 more

[root@VM_0_2_centos elasticsearch-7.1.1]#
这是不能使用root用户操作，添加一个其他的用户再试试：

[root@VM_0_2_centos elasticsearch-7.1.1]# adduser es
[root@VM_0_2_centos elasticsearch-7.1.1]# passwd es

Changing password for user es.
New password: 
Retype new password:
passwd: all authentication tokens updated successfully.

改一下es目录所属用户：

[root@VM_0_2_centos elasticsearch-7.1.1]# chown es /usr/local/elasticsearch-7.1.1/ -R

vim 编辑 /etc/security/limits.conf，在末尾加上：

es soft nofile 65536
es hard nofile 65536
es soft nproc 4096
es hard nproc 4096

vim 编辑 vim /etc/security/limits.d/20-nproc.conf，将* 改为用户名（es）：

# Default limit for number of user's processes to prevent
# accidental fork bombs.
# See rhbz #432903 for reasoning.

es soft nproc 4096
root soft nproc unlimited

vim 编辑 /etc/sysctl.conf，在末尾加上：

vm.max_map_count = 655360

执行：

[root@VM_0_2_centos ~]# sysctl -p

kernel.printk = 5
vm.max_map_count = 655360

[root@VM_0_2_centos ~]#
登录刚才新建的es用户，并启动elasticsearch，OK

[root@VM_0_2_centos elasticsearch-7.1.1]# su es
[es@VM_0_2_centos elasticsearch-7.1.1]$ ./bin/elasticsearch

后台启动：

[es@VM_0_2_centos elasticsearch-7.1.1]$ ./bin/elasticsearch -d
[es@VM_0_2_centos elasticsearch-7.1.1]$

查看进程：

[es@VM_0_2_centos elasticsearch-7.1.1]$ ./bin/elasticsearch -d
[es@VM_0_2_centos elasticsearch-7.1.1]$ ps -ef|grep elasticsearch

es 18652 1 19 17:48 pts/2 00:00:00 /usr/local/java/jdk1.8.0_211/bin/java -Xms200m -Xmx200m -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -Des.networkaddress.cache.ttl=60 -Des.networkaddress.cache.negative.ttl=10 -XX:+AlwaysPreTouch -Xss1m -Djava.awt.headless=true -Dfile.encoding=UTF-8 -Djna.nosys=true -XX:-OmitStackTraceInFastThrow -Dio.netty.noUnsafe=true -Dio.netty.noKeySetOptimization=true -Dio.netty.recycler.maxCapacityPerThread=0 -Dlog4j.shutdownHookEnabled=false -Dlog4j2.disable.jmx=true -Djava.io.tmpdir=/tmp/elasticsearch-182563007296674551 -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=data -XX:ErrorFile=logs/hs_err_pid%p.log -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintTenuringDistribution -XX:+PrintGCApplicationStoppedTime -Xloggc:logs/gc.log -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=32 -XX:GCLogFileSize=64m -Dio.netty.allocator.type=unpooled -Des.path.home=/usr/local/elasticsearch-7.1.1 -Des.path.conf=/usr/local/elasticsearch-7.1.1/config -Des.distribution.flavor=default -Des.distribution.type=tar -Des.bundled_jdk=true -cp /usr/local/elasticsearch-7.1.1/lib/* org.elasticsearch.bootstrap.Elasticsearch -d
es 18728 8399 0 17:48 pts/2 00:00:00 grep --color=auto elasticsearch

[es@VM_0_2_centos elasticsearch-7.1.1]$

转自：https://blog.csdn.net/luo1544943710/article/details/93196147