原 docker下安装elasticsearch 7.6.2

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一：从docker hub上拉取elasticsearch 7.6.2镜像。

docker pull elasticsearch:7.6.2

二：创建目录挂载文件夹和创建es配置文件。

mkdir -p /mydata/elasticsearch/config

mkdir -p /mydata/elasticsearch/data

echo "http.host: 0.0.0.0">>/mydata/elasticsearch/config/elasticsearch.yml

三：运行docker，并指定挂载文件。

docker run --name elasticsearch -p 9200:9200 -p 9300:9300 \
-e "discovery.type=single-node" \
-e ES_JAVA_OPTS="-Xms64m -Xmx128m" \
-v /mydata/elasticsearch/config/elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml \
-v /mydata/elasticsearch/data:/usr/share/elasticsearch/data \
-v /mydata/elasticsearch/plugins:/usr/share/elasticsearch/plugins \
-d elasticsearch:7.6.2

启动后我们用docker ps查看发现elasticsearch没有启动起来。

我们查看下elasticsearch的启动日志。

docker ps -a

执行命令：

docker logs b133f3714be4

错误信息：

ElasticsearchException[failed to bind service]; nested: AccessDeniedException[/usr/share/elasticsearch/data/nodes];
Likely root cause: java.nio.file.AccessDeniedException: /usr/share/elasticsearch/data/nodes
        at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:90)
        at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)
        at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:116)
        at java.base/sun.nio.fs.UnixFileSystemProvider.createDirectory(UnixFileSystemProvider.java:389)
        at java.base/java.nio.file.Files.createDirectory(Files.java:693)
        at java.base/java.nio.file.Files.createAndCheckIsDirectory(Files.java:800)
        at java.base/java.nio.file.Files.createDirectories(Files.java:786)
        at org.elasticsearch.env.NodeEnvironment.lambda$new$0(NodeEnvironment.java:274)
        at org.elasticsearch.env.NodeEnvironment$NodeLock.<init>(NodeEnvironment.java:211)
        at org.elasticsearch.env.NodeEnvironment.<init>(NodeEnvironment.java:271)
        at org.elasticsearch.node.Node.<init>(Node.java:277)
        at org.elasticsearch.node.Node.<init>(Node.java:257)
        at org.elasticsearch.bootstrap.Bootstrap$5.<init>(Bootstrap.java:221)
        at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:221)
        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: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)
For complete error details, refer to the log at /usr/share/elasticsearch/logs/elasticsearch.log

错误原因是data目录下权限不够。

我们切换到/mydata/elasticsearch目录下

cd /mydata/elasticsearch/

目前的权限如下所示。

我们为/mydata/elasticsearch目录下的所有文件赋予777的权限。

chmod -R 777 /mydata/elasticsearch

四：重新启动elasticsearch

docker start b133f3714be4

再次用docker ps查看

设置elasticsearch开机自启动。

docker update --restart=always elasticsearch

我们使用浏览器访问：http://ip:9200，如果访问不了，需要防火墙开放9200端口。