elasticsearch部署踩坑Permission denied等问题

关于启动elasticsearch时报Permission denied的问题
在安装目录/etc/elasticsearch/bin下

./elasticsearch

报错内容
./elasticsearch-env: line 70: /etc/sysconfig/elasticsearch: Permission denied

使用root 用户执行以下命令：

chown -R es /etc/elasticsearch

chown -R es /usr/share/elasticsearch/

chmod 777 /etc/elasticsearch

chmod 777 /usr/share/elasticsearch/

chmod 777 /etc/sysconfig/elasticsearch

启动报错

Java HotSpot(TM) 64-Bit Server VM warning: Cannot open file /var/log/elasticsearch/gc.log due to Permission denied

2021-12-30 21:26:37,957 main ERROR Unable to create file /var/log/elasticsearch/elasticsearch.log java.io.IOException: Permission denied

没有权限
使用root 分配权限：chown -R es /var/

在切换到es用户启动

[2021-12-30T21:33:53,124][INFO ][o.e.n.Node               ] [] initializing ...
[2021-12-30T21:33:53,157][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [] uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: java.lang.IllegalStateException: failed to obtain node locks, tried [[/var/lib/elasticsearch/elasticsearch]] with lock id [0]; maybe these locations are not writable or multiple nodes were started without increasing [node.max_local_storage_nodes] (was [1])?
	at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:140) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:127) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.4.3.jar:6.4.3]
	at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-cli-6.4.3.jar:6.4.3]
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:93) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:86) ~[elasticsearch-6.4.3.jar:6.4.3]
Caused by: java.lang.IllegalStateException: failed to obtain node locks, tried [[/var/lib/elasticsearch/elasticsearch]] with lock id [0]; maybe these locations are not writable or multiple nodes were started without increasing [node.max_local_storage_nodes] (was [1])?
	at org.elasticsearch.env.NodeEnvironment.<init>(NodeEnvironment.java:247) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.node.Node.<init>(Node.java:274) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.node.Node.<init>(Node.java:256) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.bootstrap.Bootstrap$5.<init>(Bootstrap.java:213) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:213) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:326) ~[elasticsearch-6.4.3.jar:6.4.3]
	at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:136) ~[elasticsearch-6.4.3.jar:6.4.3]
	... 6 more

修改elasticsearch.yml文件，在最后一行新增

node.max_local_storage_nodes: 2

编辑 /etc/security/limits.conf，追加以下内容；

* soft nofile 65536
* hard nofile 65536

此文件修改后需要重新登录用户，才会生效

编辑 /etc/sysctl.conf，追加以下内容：
vm.max_map_count=655360
保存后，执行：
sysctl -p

重新启动，成功。

bin/elasticsearch &

最后

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