Open Distro for Elasticsearch是AWS开源版本的ELK架构，原来Elasticsearch中部分需要付费的功能可以免费使用（如Alert），对于我等追求开（mian）源（fei）的大（diao）众（si）用户来说，确实是一个不错的选择。

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按照其安装步骤安装好后可以使用默认密码admin:admin登录，但修改这个默认密码却不容易，翻遍全网，汇总如下，供有需要的同学参考：

第一步：生成新的Admin密码Hash

#Create Hashes for Your admin

sudo chmod +x /usr/share/elasticsearch/plugins/opendistro_security/tools/hash.sh

/bin/bash -c /usr/share/elasticsearch/plugins/opendistro_security/tools/hash.sh

7-mDj5=

$2y$12$tOoM6Wz.elENbw23EZfqL.CSrd7giB/5yKQQ0YWq8ZSwfXJPBEq8m

第二步：将上一步生成的密码Hash记录下来，编辑internal_users.yml（编辑前请备份）

#Create a Local, Modified Copy of internal_users.yml, then replace with the new admin hash

cd /usr/share/elasticsearch/plugins/opendistro_security/securityconfig/

sudo cp internal_users.yml internal_users.yml.backup

sudo vim internal_users.yml

第三步：执行命令让elasticsearch更新密码

#to reflect the changes, run below commands,

#https://opendistro.github.io/for-elasticsearch-docs/docs/security-configuration/security-admin/

cd /usr/share/elasticsearch/plugins/opendistro_security/tools/

sudo bash ./securityadmin.sh -cd ../securityconfig/ -icl -nhnv -cacert /etc/elasticsearch/root-ca.pem -cert /etc/elasticsearch/kirk.pem -key /etc/elasticsearch/kirk-key.pem

以前三步完成就可以使用新的密码登录Kibana了，API调用也可以使用新密码进行认证了，用原密码再认证会提示Unauthorized.

最后一步执行成功后会输出如下内容

WARNING: JAVA_HOME not set, will use /usr/bin/java

Open Distro Security Admin v7

Will connect to localhost:9300 ... done

Connected as CN=kirk,OU=client,O=client,L=test,C=de

Elasticsearch Version: 7.3.2

Open Distro Security Version: 1.3.0.0

Contacting elasticsearch cluster 'elasticsearch' and wait for YELLOW clusterstate ...

Clustername: 8zcl5szk

Clusterstate: YELLOW

Number of nodes: 1

Number of data nodes: 1

.opendistro_security index already exists, so we do not need to create one.

Populate config from /usr/share/elasticsearch/plugins/opendistro_security/securityconfig

Will update '_doc/config' with ../securityconfig/config.yml

   SUCC: Configuration for 'config' created or updated

Will update '_doc/roles' with ../securityconfig/roles.yml

   SUCC: Configuration for 'roles' created or updated

Will update '_doc/rolesmapping' with ../securityconfig/roles_mapping.yml

   SUCC: Configuration for 'rolesmapping' created or updated

Will update '_doc/internalusers' with ../securityconfig/internal_users.yml

   SUCC: Configuration for 'internalusers' created or updated

Will update '_doc/actiongroups' with ../securityconfig/action_groups.yml

   SUCC: Configuration for 'actiongroups' created or updated

Will update '_doc/tenants' with ../securityconfig/tenants.yml

   SUCC: Configuration for 'tenants' created or updated

Done with success

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