linux上elasticSearch7.8安裝配置
轉載原文地址： https://blog.csdn.net/han949417140/article/details/107614240
https://blog.csdn.net/qq_38380025/article/details/105263797
https://www.cnblogs.com/zlslch/p/6614037.html一、資源准
| 名稱 | 地址 | |
| elasticSearch7.8 | https://www.oracle.com/java/technologies/javase-jdk11-downloads.html | es安裝包 |
| jdk11 | https://www.oracle.com/java/technologies/javase-jdk11-downloads.html | jdk安裝包 |
jdk1.8以上都可以，本人就是jdk1.8，只是安裝的時候會提示以后的版本需要jdk11
上傳資源包到到自己的安裝目錄下。
二、安裝配置
1. 解壓
cd /opt/resources tar -zxvf elasticsearch-7.8.0-linux-x86_64.tar.gz
2. 修改elasticsearch.yml配置文件
vim 安裝路徑下的/elasticsearch-7.8.0/config/elasticsearch.yml
cluster.name: es-hld #為集群提供一個名稱 node.name: hld-1 #此節點名稱 path.data: /opt/es/data #數據存放的地址 path.logs: /opt/es/logs #日志存放地址 network.host: 0.0.0.0 #網絡綁定這樣設置就好了 cluster.initial_master_nodes: ["hld-1"] #將es-node1設置為master節點
3. 修改系統進程內存限制
vim /etc/security/limits.conf
* soft nofile 65536 * hard nofile 131072 * soft nproc 2048 * hard nproc 4096
vim /etc/sysctl.conf
vm.max_map_count=262145 #（es需要262144,我們在基礎上+1，保證它啟動）
保存退出過后在執行
sysctl -p #刷新命令
4. 創建用戶
由於elasticsearch不允許root用戶操作，所以需要建立子用戶 useradd esuser #增加一個子用戶 chown -R esuser:esuser /usr/local/elasticsearch-7.4.2 #賦權 su esuser #切換成子用戶 #進入 es/bin命令啟動 cd /usr/local/elasticsearch-7.7.0/bin ./elasticsearch -d #-d表示后台啟動，不是后台啟動，不加 "-d" 即可
5. 校驗
http：ip:9200 如果返回json字符串則安裝成功,如圖：
以上的常見問題以及解決辦法
1、./elasticsearch-7.6.1/bin/elasticsearch 啟動報以殺死 這個問題 沒有生成其他日志 只有gc的，根據gc 日志分析 分配內存問題
Java HotSpot(TM) 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
已殺死
解決:
編輯 vi config/jvm.options 文件
找到
-Xms1g
-Xmx1g
修改成你本身機器所能承受的范圍即可 如 512m
2、type [START_OBJECT] but found [VALUE_STRING]];
[elsearch@k8a elasticsearch-7.6.1]$ ./bin/elasticsearch
Java HotSpot(TM) 64-Bit Server VM warning: Option UseConcMarkSweepGC was deprecated in version 9.0 and will likely be removed in a future release.
Exception in thread "main" 2020-04-02 10:33:21,459 main ERROR No Log4j 2 configuration file found. Using default configuration (logging only errors to the console), or user programmatically provided configurations. Set system property 'log4j2.debug' to show Log4j 2 internal initialization logging. See https://logging.apache.org/log4j/2.x/manual/configuration.html for instructions on how to configure Log4j 2
SettingsException[Failed to load settings from [elasticsearch.yml]]; nested: ParsingException[Failed to parse object: expecting token of type [START_OBJECT] but found [VALUE_STRING]];
at org.elasticsearch.common.settings.Settings$Builder.loadFromStream(Settings.java:1097)
at org.elasticsearch.common.settings.Settings$Builder.loadFromPath(Settings.java:1070)
at org.elasticsearch.node.InternalSettingsPreparer.prepareEnvironment(InternalSettingsPreparer.java:83)
at org.elasticsearch.cli.EnvironmentAwareCommand.createEnv(EnvironmentAwareCommand.java:100)
at org.elasticsearch.cli.EnvironmentAwareCommand.createEnv(EnvironmentAwareCommand.java:91)
at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86)
at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:125)
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)
Caused by: ParsingException[Failed to parse object: expecting token of type [START_OBJECT] but found [VALUE_STRING]]
at org.elasticsearch.common.xcontent.XContentParserUtils.ensureExpectedToken(XContentParserUtils.java:78)
at org.elasticsearch.common.settings.Settings.fromXContent(Settings.java:617)
at org.elasticsearch.common.settings.Settings.access$400(Settings.java:82)
at org.elasticsearch.common.settings.Settings$Builder.loadFromStream(Settings.java:1093)
解決：
這個是因為編輯 vi config/elasticsearch.yml 的key 和value 寫錯了導致， 仔細檢查你所修改的地方就可以發現問題
提示，key 和value 之間除了：還有個 空格 如： key: (空格)value
3、
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535]
[2]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
[3]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts,
這里是三個問題
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535]
[2]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
[3]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured
ERROR: Elasticsearch did not exit normally - check the logs at /home/elsearch/elasticsearch-7.6.1/logs/elasticsearch.log
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535]
解決
編輯文件 用root 用戶
vi /etc/security/limits.conf請將es修改為你對應的 啟動 elasticsearch 用戶名
-
es hard nofile 65536
-
es soft nofile 65536
重啟服務器 在重新啟動es即可
[2]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
解決：
切換到root用戶修改配置sysctl.conf
vi /etc/sysctl.conf 添加下面配置：
vm.max_map_count=655360 並執行命令：
sysctl -p 然后，重新啟動elasticsearch，即可啟動成功。
[3]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts,
解決
修改
vi /conf/elasticsearch.yml找到 默認是有注釋的，把注釋去掉 后保存
cluster.initial_master_nodes: ["node-1"]重啟es 即可