1.需要在配置文件中开启x-pack验证, 修改config目录下面的elasticsearch.yml文件，在里面添加如下内容,并重启.
xpack.security.enabled: true
xpack.license.self_generated.type: basic
xpack.security.transport.ssl.enabled: true
2，执行设置用户名和密码的命令,这里需要为4个用户分别设置密码，elastic, kibana, logstash_system,beats_system
bin/elasticsearch-setup-passwords interactive
网上设置时出现的：
Initiating the setup of passwords for reserved users elastic,kibana,logstash_system,beats_system.
You will be prompted to enter passwords as the process progresses.
Please confirm that you would like to continue [y/N]y
Enter password for [elastic]:
passwords must be at least [6] characters long
Try again.
Enter password for [elastic]:
Reenter password for [elastic]:
Passwords do not match.
Try again.
Enter password for [elastic]:
Reenter password for [elastic]:
Enter password for [kibana]:
Reenter password for [kibana]:
Enter password for [logstash_system]:
Reenter password for [logstash_system]:
Enter password for [beats_system]:
Reenter password for [beats_system]:
Changed password for user [kibana]
Changed password for user [logstash_system]
Changed password for user [beats_system]
Changed password for user [elastic]
我设置密码时出现的：
[es@k8snode2 elasticsearch-7.3.0]$ ./bin/elasticsearch-setup-passwords interactive
Initiating the setup of passwords for reserved users elastic,apm_system,kibana,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]y
Enter password for [elastic]:
Reenter password for [elastic]:
Passwords do not match.
Try again.
Enter password for [elastic]:
Reenter password for [elastic]:
Enter password for [apm_system]:
Reenter password for [apm_system]:
Enter password for [kibana]:
Reenter password for [kibana]:
Enter password for [logstash_system]:
Reenter password for [logstash_system]:
Enter password for [beats_system]:
Reenter password for [beats_system]:
Enter password for [remote_monitoring_user]:
Reenter password for [remote_monitoring_user]:
Changed password for user [apm_system]
Changed password for user [kibana]
Changed password for user [logstash_system]
Changed password for user [beats_system]
Changed password for user [remote_monitoring_user]
Changed password for user [elastic]
其中，用户权限分别如下：
修改密码命令如下：
curl -H "Content-Type:application/json" -XPOST -u elastic 'http://127.0.0.1:9200/_xpack/security/user/elastic/_password' -d '{ "password" : "123456" }'
Elasticsearch设置用户名密码之后，不能再直接使用Elasticsearch head 访问，可以在查询等API上加上用户等参数：
curl -XGET --user user:passwd 'http://XXXX:9200/XX/XXX'
比如想要清空某个索引下的数据：
curl -XPOST --user admin:admin 'http://XXXX:9200/XXXX/XXX/_delete_by_query' -H "Content-Type: application/json" -d '{ "query":{"match_all":{}}}'
添加角色接口为：POST /_xpack/security/role/
下面添加一个超级管理员角色为例：
[elastic@data-backup elasticsearch-6.2.4]$ curl -XPOST -H 'Content-type: application/json' -u elastic:elastic123 'http://10.163.19.231:9600/_xpack/security/role/admin?pretty' -d '{
"run_as":["elastic"],
"cluster":["all"],
"indices":[
{
"names":["*"],
"privileges":["all"]
}
]
}'
{
"role" : {
"created" : true
}
}
[elastic@data-backup elasticsearch-6.2.4]$ curl -XGET -H 'Content-type: application/json' -u elastic:elastic123 'http://10.163.19.231:9600/_xpack/security/role/admin?pretty'
{
"admin" : {
"cluster" : [
"all"
],
"indices" : [
{
"names" : [
"*"
],
"privileges" : [
"all"
]
}
],
"run_as" : [
"elastic"
],
"metadata" : { },
"transient_metadata" : {
"enabled" : true
}
}
}
添加用户接口为：POST/_xpack/security/user/
下面以添加一个test用户并添加至admin角色为例：
[elastic@data-backup elasticsearch-6.2.4]$ curl -XGET -H 'Content-type: application/json' -u test:Test123654% 'http://10.163.19.231:9600/_cat/indices?pretty'
green open .monitoring-es-6-2019.09.17 J1K2XG1eTXqw0GHSOH5Gwg 1 0 848 104 846.9kb 846.9kb
green open .watches qHj5owowRC-3DeK8DaLD-g 1 0 6 0 47.8kb 47.8kb
green open .triggered_watches 2pm3BwCnTaKgyzl39eFpUw 1 0 0 0 5.1kb 5.1kb
yellow open monitor yFnfztziSguTq9VsfSANpw 5 1 48 0 226.7kb 226.7kb
green open .watcher-history-7-2019.09.17 uz6RA_8vRraHHLAitWKtAw 1 0 74 0 259.8kb 259.8kb
green open .monitoring-alerts-6 ZPTqnNVOQ5GlUK1ncXNQDQ 1 0 2 0 18.1kb 18.1kb
yellow open track AqSGAZnAQE2NGvZXlp9zcw 5 1 1343729 175384 201mb 201mb
green open .security-6 83fAslPbQDSGbGWfhiMAXA 1 0
注：这里要注意的是用户密码最好不要有"$" "!"之类的字符，这样有可能会导致密码认证不成功，其他字符测试过暂时没问题（具体原因不详，反正我遇到过这个坑）
修改配置文件elasticsearch.yml，增加
http.cors.allow-headers: Authorization
访问head时，url如下所示：
http://192.168.100.100:9100/auth_user=elastic&auth_password=changeme
//初始化ES操作客户端
final CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
credentialsProvider.setCredentials(AuthScope.ANY,
new UsernamePasswordCredentials("elastic", "123456")); //es账号密码（默认用户名为elastic）
RestHighLevelClient esClient =new RestHighLevelClient(
RestClient.builder(
new HttpHost("127.0.0.1",9200)
).setHttpClientConfigCallback(new RestClientBuilder.HttpClientConfigCallback() {
public HttpAsyncClientBuilder customizeHttpClient(HttpAsyncClientBuilder httpClientBuilder) {
httpClientBuilder.disableAuthCaching();
return httpClientBuilder.setDefaultCredentialsProvider(credentialsProvider);
}
})/.setMaxRetryTimeoutMillis(2000)/
);