https://www.heckjj.com/index.php zh-cn https://www.heckjj.com/post// Heck <@hecks.tk> Mon, 27 Feb 2023 15:28:06 +0000 https://www.heckjj.com/post//
Download Elasticsearch

https://www.elastic.co/cn/downloads/elasticsearch


因为这里本机已经安装运行，为了演示从零开始，我们在Windows沙盒中演示，Win10操作系统的沙盒http://www.javacui.com/tool/660.html 。
因为沙盒开始是一个纯净的系统，所以需要安装ZIP工具，安装文本编辑工具方便修改配置文件。


这里下载了elasticsearch-8.2.2-windows-x86_64，可以根据网站提示下载最新版本，虽然ES依赖JDK，但是ES安装文件内置了JDK，因为纯净的系统上无需安装再次安装JDK，直接运行bin下elasticsearch.bat即可。

初次启动，显示的配置信息，一定要保存下来，以备使用。


访问https://127.0.0.1:9200，注意是HTTPS不是HTTP，用户名密码刚才控制台已经打印出来了。


证明安装成功。


问题1：内存直接占满

此时你打开任务管理器，发现一个问题，ES启动后，占据了沙盒的全部内存。我的本机是32G的，启动也是直接打满，导致系统卡爆。

因此我们需要配置启动内存，配置文件conf/jvm.options


################################################################
## IMPORTANT: JVM heap size
################################################################
##
## The heap size is automatically configured by Elasticsearch
## based on the available memory in your system and the roles
## each node is configured to fulfill. If specifying heap is
## required, it should be done through a file in jvm.options.d,
## which should be named with .options suffix, and the min and
## max should be set to the same value. For example, to set the
## heap to 4 GB, create a new file in the jvm.options.d
## directory containing these lines:
##
-Xms1g
-Xmx1g
在这里修改为合适的内存，这里修改为1G，沙盒全部内存是4G，合理配置即可。


问题2：二次启动报错

修改配置文件后，再次启动，这时不会再次打印第一次启动时的配置信息了。但是报错了


[2022-06-16T10:40:55,562][ERROR][o.e.i.g.GeoIpDownloader  ] [06A8DD4C-A847-4] exception during geoip databases update
org.elasticsearch.ElasticsearchException: not all primary shards of [.geoip_databases] index are active
        at org.elasticsearch.ingest.geoip.GeoIpDownloader.updateDatabases(GeoIpDownloader.java:135) ~[ingest-geoip-8.2.2.jar:8.2.2]
        at org.elasticsearch.ingest.geoip.GeoIpDownloader.runDownloader(GeoIpDownloader.java:275) [ingest-geoip-8.2.2.jar:8.2.2]
        at org.elasticsearch.ingest.geoip.GeoIpDownloaderTaskExecutor.nodeOperation(GeoIpDownloaderTaskExecutor.java:102) [ingest-geoip-8.2.2.jar:8.2.2]
        at org.elasticsearch.ingest.geoip.GeoIpDownloaderTaskExecutor.nodeOperation(GeoIpDownloaderTaskExecutor.java:48) [ingest-geoip-8.2.2.jar:8.2.2]
        at org.elasticsearch.persistent.NodePersistentTasksExecutor$1.doRun(NodePersistentTasksExecutor.java:42) [elasticsearch-8.2.2.jar:8.2.2]
        at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:773) [elasticsearch-8.2.2.jar:8.2.2]
        at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:26) [elasticsearch-8.2.2.jar:8.2.2]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) [?:?]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) [?:?]
        at java.lang.Thread.run(Thread.java:833) [?:?]
因为他启动时会去更新地图的一些数据库，这里直接禁掉即可，用到时再说，配置文件conf/elasticsearch.yml，增加配置

ingest.geoip.downloader.enabled: false


问题3：本地测试不想用用户密码和SSL

本身ES服务器也不会对外开放，增加用户密码和SSL对于初学来说，徒增不必要的麻烦，这里直接干掉，还是那句话，用到再说。

配置文件conf/elasticsearch.yml，修改配置

# Enable security features
xpack.security.enabled: false

xpack.security.enrollment.enabled: false

# Enable encryption for HTTP API client connections, such as Kibana, Logstash, and Agents
xpack.security.http.ssl:
  enabled: false
  keystore.path: certs/http.p12

# Enable encryption and mutual authentication between cluster nodes
xpack.security.transport.ssl:
  enabled: false
  verification_mode: certificate
  keystore.path: certs/transport.p12
  truststore.path: certs/transport.p12
# Create a new cluster with the current node only
# Additional nodes can still join the cluster later
cluster.initial_master_nodes: ["06A8DD4C-A847-4"]

# Allow HTTP API connections from anywhere
# Connections are encrypted and require user authentication
http.host: 0.0.0.0

# Allow other nodes to join the cluster from anywhere
# Connections are encrypted and mutually authenticated
#transport.host: 0.0.0.0
原来都是true，这里都改成了false，前面是要求用户登录的，后面是要求SSL的，没必要，干掉。

再次启动访问http://127.0.0.1:9200 ,可以直接打开使用。

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