为ELK提供SSL访问

五、设置ELK密码(可选)

1. 开启elasticsearch密码
   vim /data/elk/elasticsearch/config/elasticsearch.yml
   末尾增加两行

   # 开启密码
   xpack.security.transport.ssl.enabled: true
   xpack.security.enabled: true

2. 为kibana配置访问密码
   vim /data/elk/kibana/config/kibana.yml
   末尾增加用户名密码配置

   # elk体系有很多的用户组，elastic是默认的用户组之一，可以使用默认的用户，也可以自定义用户
   elasticsearch.username: "elastic" 
   elasticsearch.password: "1qaz@WSX3edc"

3. 重启ELK
   docker restart elk
   重启可能报错.

   [elk] Exception
   org.elasticsearch.ElasticsearchSecurityException: invalid SSL configuration for xpack.security.transport.ssl - server ssl configuration requires a key and certificate, but these have not been configured; you must set either [xpack.security.transport.ssl.keystore.path], or both [xpack.security.transport.ssl.key] and [xpack.security.transport.ssl.certificate]
    at org.elasticsearch.xpack.core.ssl.SSLService.validateServerConfiguration(SSLService.java:635) ~[?:?]
    at org.elasticsearch.xpack.core.ssl.SSLService.loadSslConfigurations(SSLService.java:612) ~[?:?]
    at org.elasticsearch.xpack.core.ssl.SSLService.<init>(SSLService.java:156) ~[?:?]
    at org.elasticsearch.xpack.core.XPackPlugin.createSSLService(XPackPlugin.java:461) ~[?:?]
    at org.elasticsearch.xpack.core.XPackPlugin.createComponents(XPackPlugin.java:310) ~[?:?]
    at org.elasticsearch.node.Node.lambda$new$14(Node.java:668) ~[elasticsearch-8.3.3.jar:?]
    at org.elasticsearch.plugins.PluginsService.lambda$flatMap$0(PluginsService.java:235) ~[elasticsearch-8.3.3.jar:?]
    at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:273) ~[?:?]
    at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[?:?]
    at java.util.AbstractList$RandomAccessSpliterator.forEachRemaining(AbstractList.java:720) ~[?:?]
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?]
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?]
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:575) ~[?:?]
    at java.util.stream.AbstractPipeline.evaluateToArrayNode(AbstractPipeline.java:260) ~[?:?]
    at java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:616) ~[?:?]
    at java.util.stream.ReferencePipeline.toArray(ReferencePipeline.java:622) ~[?:?]
    at java.util.stream.ReferencePipeline.toList(ReferencePipeline.java:627) ~[?:?]
    at org.elasticsearch.node.Node.<init>(Node.java:681) ~[elasticsearch-8.3.3.jar:?]
    at org.elasticsearch.node.Node.<init>(Node.java:300) ~[elasticsearch-8.3.3.jar:?]
    at org.elasticsearch.bootstrap.Bootstrap$5.<init>(Bootstrap.java:230) ~[elasticsearch-8.3.3.jar:?]
    at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:230) ~[elasticsearch-8.3.3.jar:?]
    at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:333) [elasticsearch-8.3.3.jar:?]
    at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:224) [elasticsearch-8.3.3.jar:?]
    at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:67) [elasticsearch-8.3.3.jar:?]
   [2022-09-05T19:41:12,778][ERROR][o.e.b.Elasticsearch      ] [elk] fatal exception while booting Elasticsearch
   org.elasticsearch.bootstrap.StartupException: org.elasticsearch.ElasticsearchSecurityException: invalid SSL configuration for xpack.security.transport.ssl - server ssl configuration requires a key and certificate, but these have not been configured; you must set either [xpack.security.transport.ssl.keystore.path], or both [xpack.security.transport.ssl.key] and [xpack.security.transport.ssl.certificate]
    at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:228) [elasticsearch-8.3.3.jar:?]
    at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:67) [elasticsearch-8.3.3.jar:?]
   Caused by: org.elasticsearch.ElasticsearchSecurityException: invalid SSL configuration for xpack.security.transport.ssl - server ssl configuration requires a key and certificate, but these have not been configured; you must set either [xpack.security.transport.ssl.keystore.path], or both [xpack.security.transport.ssl.key] and [xpack.security.transport.ssl.certificate]

   较新的版本开启密码需要SSL证书, 如果报以上错误， 还原上面五-第一步的操作， 再重启ELK生成证书； 如果ELK正常重启， 跳过以下步骤。
   3.1 重启ELK
   docker restart elk
   3.2 进入docker
   docker exec -it elk /bin/bash
   3.3 生成elastic-stack-ca.p12文件

   cd /opt/elasticsearch
   ./bin/elasticsearch-certutil ca
   Please enter the desired output file [elastic-stack-ca.p12]:  #回车
   Enter password for elastic-stack-ca.p12 : #CA证书的密码,回车
   # ls     
   bin  config  data  elastic-stack-ca.p12  jdk  lib  LICENSE.txt  logs  modules  nohup.out  NOTICE.txt  plugins  README.asciidoc

   3.4 生成elastic-certificates.p12文件

   ./bin/elasticsearch-certutil cert --ca elastic-stack-ca.p12
   Enter password for CA (elastic-stack-ca.p12) : # CA证书的密码，直接回车
   Please enter the desired output file [elastic-certificates.p12]: # 默认
   Enter password for elastic-certificates.p12 : # 证书密码，直接回车

   3.5 回到宿主机，复制elastic-stack-ca.p12、elastic-certificates.p12到elaticsearch/config目录

   docker cp elk:/opt/elasticsearch/elastic-certificates.p12 /data/elk/elasticsearch/config/
   docker cp elk:/opt/elasticsearch/elastic-stack-ca.p12 /data/elk/elasticsearch/config/
   
   # 修改权限
   cd /data/elk
   chown -R 991:991 elasticsearch*

   3.6 再次编辑ES配置
   vim /data/elk/elasticsearch/config/elasticsearch.yml

   # 开启密码
   xpack.security.transport.ssl.enabled: true
   xpack.security.enabled: true
   xpack.license.self_generated.type: basic
   xpack.security.transport.ssl.verification_mode: certificate
   xpack.security.transport.ssl.keystore.path: elastic-certificates.p12
   xpack.security.transport.ssl.truststore.path: elastic-certificates.p12

   3.7 重启ELK
   docker restart elk

4. 设置elasticsearch密码(启动容器后)

   # 进入elk容器
   docker exec -it elk /bin/bash
   cd /opt/elasticsearch/bin
   # 手动设置密码
   ./elasticsearch-setup-passwords interactive
   # Initiating the setup of passwords for reserved users elastic,apm_system,kibana,kibana_system,logstash_system,beats_system,remote_monitoring_user.
   # You will be prompted to enter passwords as the process progresses.
   # Please confirm that you would like to continue [y/N] 按Y继续
   # 在后面的提示中配置密码，配置密码即可, 会有很多个密码， 都配成跟上一步一样的密码: 1qaz@WSX3edc

5. 重启ELK
   docker restart elk