Elasticsearch下载地址
1. 解压之后移动到 /usr/local/ 目录下
[root@localhost software]# tar -zxvf elasticsearch-7.10.2-linux-x86_64.tar.gz
[root@localhost software]# mv elasticsearch-7.10.2 /usr/local/
复制代码2. 配置 config/elasticsearch.yml
# ---------------------------------- Cluster -----------------------------------
#
# Use a descriptive name for your cluster:
# 改个名字
cluster.name: test-elasticsearch
#
# ------------------------------------ Node ------------------------------------
#
# Use a descriptive name for the node:
# 节点名称
node.name: es-node1
#
# Add custom attributes to the node:
#
#node.attr.rack: r1
#
# ----------------------------------- Paths ------------------------------------
#
# Path to directory where to store the data (separate multiple locations by comma):
# 数据存储路径
path.data: /usr/local/elasticsearch-7.10.2/data
#
# Path to log files:
# 日志存储路径
path.logs: /usr/local/elasticsearch-7.10.2/logs
#
# ---------------------------------- Network -----------------------------------
#
# Set the bind address to a specific IP (IPv4 or IPv6):
#
network.host: 0.0.0.0
#
# Set a custom port for HTTP:
# 默认9200端口
#http.port: 9200
#
# For more information, consult the network module documentation.
#
# --------------------------------- Discovery ----------------------------------
#
# Pass an initial list of hosts to perform discovery when this node is started:
# The default list of hosts is ["127.0.0.1", "[::1]"]
#
#discovery.seed_hosts: ["host1", "host2"]
#
# Bootstrap the cluster using an initial set of master-eligible nodes:
# 对应上面配置的node.name
cluster.initial_master_nodes: ["es-node1"]
#
# For more information, consult the discovery and cluster formation module documentation.
复制代码3. 配置 config/jvm.options
如果内存大，可以不修改
## JVM configuration
# Xms represents the initial size of total heap space
# Xmx represents the maximum size of total heap space
# 将原来的1g修改成128m
-Xms128m
-Xmx128m
复制代码4. 启动Elasticsearch
4.1 第一个问题：Elasticsearch不允许使用root用户启动
解决方法：
- 第1步. 先添加一个普通用户
[root@localhost elasticsearch-7.10.2]# useradd esuser
复制代码- 第2步. 对添加的用户授权，授权elasticsearch目录
[root@localhost elasticsearch-7.10.2]# pwd
/usr/local/elasticsearch-7.10.2
[root@localhost elasticsearch-7.10.2]# chown -R esuser /usr/local/elasticsearch-7.10.2
复制代码- 第3步. 查看elasticsearch目录当前用户
[root@localhost elasticsearch-7.10.2]# ll
总用量 568
drwxr-xr-x. 2 esuser root 4096 1月 13 08:46 bin
drwxr-xr-x. 3 esuser root 169 2月 2 11:34 config
drwxr-xr-x. 2 esuser root 6 2月 2 11:25 data
drwxr-xr-x. 9 esuser root 107 1月 13 08:46 jdk
drwxr-xr-x. 3 esuser root 4096 1月 13 08:46 lib
-rw-r--r--. 1 esuser root 13675 1月 13 08:39 LICENSE.txt
drwxr-xr-x. 2 esuser root 6 1月 13 08:44 logs
drwxr-xr-x. 53 esuser root 4096 1月 13 08:47 modules
-rw-r--r--. 1 esuser root 544318 1月 13 08:44 NOTICE.txt
drwxr-xr-x. 2 esuser root 6 1月 13 08:44 plugins
-rw-r--r--. 1 esuser root 7313 1月 13 08:39 README.asciidoc
[root@localhost elasticsearch-7.10.2]#
复制代码现在再看elasticsearch目录下的用户都是esuser了
整个操作命令
[root@localhost elasticsearch-7.10.2]# useradd esuser
[root@localhost elasticsearch-7.10.2]# pwd
/usr/local/elasticsearch-7.10.2
[root@localhost elasticsearch-7.10.2]# chown -R esuser /usr/local/elasticsearch-7.10.2
[root@localhost elasticsearch-7.10.2]# ll
总用量 568
drwxr-xr-x. 2 esuser root 4096 1月 13 08:46 bin
drwxr-xr-x. 3 esuser root 169 2月 2 11:34 config
drwxr-xr-x. 2 esuser root 6 2月 2 11:25 data
drwxr-xr-x. 9 esuser root 107 1月 13 08:46 jdk
drwxr-xr-x. 3 esuser root 4096 1月 13 08:46 lib
-rw-r--r--. 1 esuser root 13675 1月 13 08:39 LICENSE.txt
drwxr-xr-x. 2 esuser root 6 1月 13 08:44 logs
drwxr-xr-x. 53 esuser root 4096 1月 13 08:47 modules
-rw-r--r--. 1 esuser root 544318 1月 13 08:44 NOTICE.txt
drwxr-xr-x. 2 esuser root 6 1月 13 08:44 plugins
-rw-r--r--. 1 esuser root 7313 1月 13 08:39 README.asciidoc
复制代码这个时候进入到 bin 目录下启动es，还是会报错 can not run elasticsearch as root
[root@localhost elasticsearch-7.10.2]# cd bin/
[root@localhost bin]# ./elasticsearch
[2021-02-02T13:34:16,921][ERROR][o.e.b.ElasticsearchUncaughtExceptionHandler] [es-node1] 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:174) ~[elasticsearch-7.10.2.jar:7.10.2]
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:161) ~[elasticsearch-7.10.2.jar:7.10.2]
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-7.10.2.jar:7.10.2]
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:127) ~[elasticsearch-cli-7.10.2.jar:7.10.2]
at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-7.10.2.jar:7.10.2]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:126) ~[elasticsearch-7.10.2.jar:7.10.2]
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) ~[elasticsearch-7.10.2.jar:7.10.2]
Caused by: java.lang.RuntimeException: can not run elasticsearch as root
at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:111) ~[elasticsearch-7.10.2.jar:7.10.2]
at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:178) ~[elasticsearch-7.10.2.jar:7.10.2]
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:393) ~[elasticsearch-7.10.2.jar:7.10.2]
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:170) ~[elasticsearch-7.10.2.jar:7.10.2]
... 6 more
uncaught exception in thread [main]
java.lang.RuntimeException: can not run elasticsearch as root
at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:111)
at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:178)
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:393)
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:170)
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:161)
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86)
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:127)
at org.elasticsearch.cli.Command.main(Command.java:90)
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:126)
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92)
For complete error details, refer to the log at /usr/local/elasticsearch-7.10.2/logs/imooc-elasticsearch.log
[root@localhost bin]# 2021-02-02 05:34:17,281350 UTC [118575] INFO Main.cc@103 Parent process died - ML controller exiting
复制代码- 第4步. 使用 su 命令切换到 esuser 用户 ，再进行启动
[root@localhost bin]# su esuser
[esuser@localhost bin]$ ./elasticsearch
Exception in thread "main" java.nio.file.AccessDeniedException: /usr/local/elasticsearch-7.10.2/config/elasticsearch.keystore
at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:90)
at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:106)
at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)
at java.base/sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:218)
at java.base/java.nio.file.Files.newByteChannel(Files.java:375)
at java.base/java.nio.file.Files.newByteChannel(Files.java:426)
at org.apache.lucene.store.SimpleFSDirectory.openInput(SimpleFSDirectory.java:79)
at org.elasticsearch.common.settings.KeyStoreWrapper.load(KeyStoreWrapper.java:220)
at org.elasticsearch.common.settings.HasPasswordKeyStoreCommand.execute(HasPasswordKeyStoreCommand.java:42)
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86)
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:127)
at org.elasticsearch.cli.MultiCommand.execute(MultiCommand.java:91)
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:127)
at org.elasticsearch.cli.Command.main(Command.java:90)
at org.elasticsearch.common.settings.KeyStoreCli.main(KeyStoreCli.java:43)
Exception in thread "main" org.elasticsearch.bootstrap.BootstrapException: java.nio.file.AccessDeniedException: /usr/local/elasticsearch-7.10.2/config/elasticsearch.keystore
Likely root cause: java.nio.file.AccessDeniedException: /usr/local/elasticsearch-7.10.2/config/elasticsearch.keystore
at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:90)
at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:106)
at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)
at java.base/sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:218)
at java.base/java.nio.file.Files.newByteChannel(Files.java:375)
at java.base/java.nio.file.Files.newByteChannel(Files.java:426)
at org.apache.lucene.store.SimpleFSDirectory.openInput(SimpleFSDirectory.java:79)
at org.elasticsearch.common.settings.KeyStoreWrapper.load(KeyStoreWrapper.java:220)
at org.elasticsearch.bootstrap.Bootstrap.loadSecureSettings(Bootstrap.java:240)
at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:349)
at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:170)
at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:161)
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86)
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:127)
at org.elasticsearch.cli.Command.main(Command.java:90)
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:126)
at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92)
[esuser@localhost bin]$
复制代码还是报错：java.nio.file.AccessDeniedException: /usr/local/elasticsearch-7.10.2/config/elasticsearch.keystore
没有权限访问elasticsearch.keystore
- 第5步. 需要再进行一次授权
# 回退到elasticsearch目录
[esuser@localhost bin]$ cd ..
# 切换到root用户
[esuser@localhost elasticsearch-7.10.2]$ su root
密码：
[root@localhost elasticsearch-7.10.2]# pwd
/usr/local/elasticsearch-7.10.2
# 再次对esuser授权
[root@localhost elasticsearch-7.10.2]# chown -R esuser:esuser /usr/local/elasticsearch-7.10.2
复制代码授权后再切换到 esuser用户，进行es的启动
[root@localhost elasticsearch-7.10.2]# su esuser
[esuser@localhost elasticsearch-7.10.2]$ cd bin/
[esuser@localhost bin]$ ./elasticsearch
复制代码又报错，报错信息如下
ERROR: [3] bootstrap checks failed
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535]
[2]: max number of threads [3795] for user [esuser] is too low, increase to at least [4096]
[3]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
复制代码- 打开最大文件数太少，应该修改成最少65535
- 对于用户esuser，最大线程数太少，应该修改成最少4096
- vm.max_map_count也是太少，应该修改成最少262144
- 第6步. 切换回root用户，修改 /etc/security/limits.conf 文件
[esuser@localhost elasticsearch-7.10.2]$ su root
密码：
[root@localhost elasticsearch-7.10.2]# vim /etc/security/limits.conf
复制代码添加如下配置
* soft nofile 65536
* hard nofile 131072
* soft nproc 2048
* hard nproc 4096
复制代码limits.conf完整配置如下
# /etc/security/limits.conf
#
#This file sets the resource limits for the users logged in via PAM.
#It does not affect resource limits of the system services.
#
#Also note that configuration files in /etc/security/limits.d directory,
#which are read in alphabetical order, override the settings in this
#file in case the domain is the same or more specific.
#That means for example that setting a limit for wildcard domain here
#can be overriden with a wildcard setting in a config file in the
#subdirectory, but a user specific setting here can be overriden only
#with a user specific setting in the subdirectory.
#
#Each line describes a limit for a user in the form:
#
#<domain> <type> <item> <value>
#
#Where:
#<domain> can be:
# - a user name
# - a group name, with @group syntax
# - the wildcard *, for default entry
# - the wildcard %, can be also used with %group syntax,
# for maxlogin limit
#
#<type> can have the two values:
# - "soft" for enforcing the soft limits
# - "hard" for enforcing hard limits
#
#<item> can be one of the following:
# - core - limits the core file size (KB)
# - data - max data size (KB)
# - fsize - maximum filesize (KB)
# - memlock - max locked-in-memory address space (KB)
# - nofile - max number of open file descriptors
# - rss - max resident set size (KB)
# - stack - max stack size (KB)
# - cpu - max CPU time (MIN)
# - nproc - max number of processes
# - as - address space limit (KB)
# - maxlogins - max number of logins for this user
# - maxsyslogins - max number of logins on the system
# - priority - the priority to run user process with
# - locks - max number of file locks the user can hold
# - sigpending - max number of pending signals
# - msgqueue - max memory used by POSIX message queues (bytes)
# - nice - max nice priority allowed to raise to values: [-20, 19]
# - rtprio - max realtime priority
#
#<domain> <type> <item> <value>
#
#* soft core 0
#* hard rss 10000
#@student hard nproc 20
#@faculty soft nproc 20
#@faculty hard nproc 50
#ftp hard nproc 0
#@student - maxlogins 4
* soft nofile 65536
* hard nofile 131072
* soft nproc 2048
* hard nproc 4096
# End of file
复制代码- 第7步. 修改 /etc/sysctl.conf 文件，在最下面添加一行配置 vm.max_map_count=262145
[root@localhost elasticsearch-7.10.2]# vim /etc/sysctl.conf
复制代码保存之后，需要使用命令刷新一下
[root@localhost elasticsearch-7.10.2]# sysctl -p
vm.max_map_count = 262145
[root@localhost elasticsearch-7.10.2]#
复制代码这个时候再切换到 esuser 用户，再启动es，我不信还启动不成功。。。
[root@localhost elasticsearch-7.10.2]# su esuser
[esuser@localhost elasticsearch-7.10.2]$ cd bin/
[esuser@localhost bin]$ ./elasticsearch
复制代码启动成功：
如果你没改过默认端口的话，ip:9200就可以访问了
{
"name":"es-node1",
"cluster_name":"test-elasticsearch",
"cluster_uuid":"HboO8iLRQkO2AZ8yAjV5Jw",
"version":{
"number":"7.10.2",
"build_flavor":"default",
"build_type":"tar",
"build_hash":"747e1cc71def077253878a59143c1f785afa92b9",
"build_date":"2021-01-13T00:42:12.435326Z",
"build_snapshot":false,
"lucene_version":"8.7.0",
"minimum_wire_compatibility_version":"6.8.0",
"minimum_index_compatibility_version":"6.0.0-beta1"
},
"tagline":"You Know, for Search"
}
复制代码后台启动方式
[esuser@localhost bin]$ ./elasticsearch -d
复制代码后台启动关闭方式
[esuser@localhost bin]$ ps -ef | grep elasticsearch
esuser 74171 1 21 15:00 pts/0 00:00:24 /usr/local/elasticsearch-7.10.2/jdk/bin/java -Xshare:auto -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 -XX:+ShowCodeDetailsInExceptionMessages -Dio.netty.noUnsafe=true -Dio.netty.noKeySetOptimization=true -Dio.netty.recycler.maxCapacityPerThread=0 -Dio.netty.allocator.numDirectArenas=0 -Dlog4j.shutdownHookEnabled=false -Dlog4j2.disable.jmx=true -Djava.locale.providers=SPI,COMPAT -Xms128m -Xmx128m -XX:+UseG1GC -XX:G1ReservePercent=25 -XX:InitiatingHeapOccupancyPercent=30 -Djava.io.tmpdir=/tmp/elasticsearch-8577041199296559424 -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=data -XX:ErrorFile=logs/hs_err_pid%p.log -Xlog:gc*,gc+age=trace,safepoint:file=logs/gc.log:utctime,pid,tags:filecount=32,filesize=64m -XX:MaxDirectMemorySize=67108864 -Des.path.home=/usr/local/elasticsearch-7.10.2 -Des.path.conf=/usr/local/elasticsearch-7.10.2/config -Des.distribution.flavor=default -Des.distribution.type=tar -Des.bundled_jdk=true -cp /usr/local/elasticsearch-7.10.2/lib/* org.elasticsearch.bootstrap.Elasticsearch -d
esuser 74225 74171 0 15:00 pts/0 00:00:00 /usr/local/elasticsearch-7.10.2/modules/x-pack-ml/platform/linux-x86_64/bin/controller
esuser 76188 56187 0 15:01 pts/0 00:00:00 grep --color=auto elasticsearch
[esuser@localhost bin]$ kill 74171
复制代码找到controller那条对应的id：74171，
使用kill命令关闭。
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