docker安装Elasticsearch7.6集群并设置密码的方法步骤

一些基础配置
关于版本和docker镜像
开始
关于elasticsearch.yml
关于证书elastic-certificates.p12
生成密码
使用密码
忘记密码

Elasticsearch从6.8开始，允许免费用户使用X-Pack的安全功能，以前安装es都是裸奔。接下来记录配置安全认证的方法。
为了简化物理安装过程，我们将使用docker安装我们的服务。
一些基础配置es需要修改linux的一些参数。
设置vm.max_map_count=262144
sudo vim /etc/sysctl.confvm.max_map_count=262144不重启，直接生效当前的命令
sysctl -w vm.max_map_count=262144es的data和logs目录需要给1000的用户授权，我们假设安装3个实力的es集群，先创建对应的数据存储文件
mkdir -p es01/datamkdir -p es01/logsmkdir -p es02/datamkdir -p es02/logsmkdir -p es03/datamkdir -p es03/logs## es的用户id为1000 ，这里暂且授权给所有人好了sudo chmod 777 es* -R
关于版本和docker镜像Elasticsearch分几种licenses ，其中Open Source和Basic是免费的，而在6.8之后安全功能才开始集成在es的Basic授权上。

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Basic对应docker镜像为
docker pull docker.elastic.co/elasticsearch/elasticsearch:7.6.2同时dockerhub同步为elasticsearch. 我们直接拉取elasticsearch:7.6.2就好。
开始首先，创建docker-compose.yml
version: '2.2'services:es01:image: elasticsearch:7.6.2container_name: es01environment:- node.name=es01- cluster.name=es-docker-cluster- discovery.seed_hosts=es02,es03- cluster.initial_master_nodes=es01,es02,es03- bootstrap.memory_lock=true- "ES_JAVA_OPTS=-Xms512m -Xmx512m"ulimits:memlock: soft: -1 hard: -1volumes:- ./es01/data:/usr/share/elasticsearch/data- ./es01/logs:/usr/share/elasticsearch/logs- ./elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml- ./elastic-certificates.p12:/usr/share/elasticsearch/config/elastic-certificates.p12ports:- 9200:9200networks:- elastices02:image: elasticsearch:7.6.2container_name: es02environment:- node.name=es02- cluster.name=es-docker-cluster- discovery.seed_hosts=es01,es03- cluster.initial_master_nodes=es01,es02,es03- bootstrap.memory_lock=true- "ES_JAVA_OPTS=-Xms512m -Xmx512m"ulimits:memlock: soft: -1 hard: -1volumes:- ./es02/data:/usr/share/elasticsearch/data- ./es02/logs:/usr/share/elasticsearch/logs- ./elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml- ./elastic-certificates.p12:/usr/share/elasticsearch/config/elastic-certificates.p12ports:- 9201:9200networks:- elastices03:image: elasticsearch:7.6.2container_name: es03environment:- node.name=es03- cluster.name=es-docker-cluster- discovery.seed_hosts=es01,es02- cluster.initial_master_nodes=es01,es02,es03- bootstrap.memory_lock=true- "ES_JAVA_OPTS=-Xms512m -Xmx512m"ulimits:memlock: soft: -1 hard: -1volumes:- ./es03/data:/usr/share/elasticsearch/data- ./es03/logs:/usr/share/elasticsearch/logs- ./elasticsearch.yml:/usr/share/elasticsearch/config/elasticsearch.yml- ./elastic-certificates.p12:/usr/share/elasticsearch/config/elastic-certificates.p12ports:- 9202:9200networks:- elastickib01:depends_on:- es01image: kibana:7.6.2container_name: kib01ports:- 5601:5601environment:ELASTICSEARCH_URL: http://es01:9200ELASTICSEARCH_HOSTS: http://es01:9200volumes:- ./kibana.yml:/usr/share/kibana/config/kibana.ymlnetworks:- elasticnetworks:elastic:driver: bridge
关于elasticsearch.yml内容如下
network.host: 0.0.0.0xpack.security.enabled: truexpack.security.transport.ssl.enabled: truexpack.security.transport.ssl.keystore.type: PKCS12xpack.security.transport.ssl.verification_mode: certificatexpack.security.transport.ssl.keystore.path: elastic-certificates.p12xpack.security.transport.ssl.truststore.path: elastic-certificates.p12xpack.security.transport.ssl.truststore.type: PKCS12xpack.security.audit.enabled: true

network.host 设置允许其他ip访问，解除ip绑定
xpack.security 则是安全相关配置，其中ssl的证书需要自己生成

关于证书elastic-certificates.p12es提供了生成证书的工具elasticsearch-certutil ，我们可以在docker实例中生成它，然后复制出来，后面统一使用。
首先运行es实例
sudo docker run -dit --name=es elasticsearch:7.6.2 /bin/bash进入实例内部
sudo docker exec -it es /bin/bash生成ca: elastic-stack-ca.p12
[root@25dee1848942 elasticsearch]# ./bin/elasticsearch-certutil caThis tool assists you in the generation of X.509 certificates and certificatesigning requests for use with SSL/TLS in the Elastic stack.The 'ca' mode generates a new 'certificate authority'This will create a new X.509 certificate and private key that can be usedto sign certificate when running in 'cert' mode.Use the 'ca-dn' option if you wish to configure the 'distinguished name'of the certificate authorityBy default the 'ca' mode produces a single PKCS#12 output file which holds:* The CA certificate* The CA's private keyIf you elect to generate PEM format certificates (the -pem option), then the output willbe a zip file containing individual files for the CA certificate and private keyPlease enter the desired output file [elastic-stack-ca.p12]: Enter password for elastic-stack-ca.p12 : 再生成cert: elastic-certificates.p12
[root@25dee1848942 elasticsearch]# ./bin/elasticsearch-certutil cert --ca elastic-stack-ca.p12This tool assists you in the generation of X.509 certificates and certificatesigning requests for use with SSL/TLS in the Elastic stack.The 'cert' mode generates X.509 certificate and private keys.这个生成elastic-certificates.p12 就是我们需要使用的。
复制出证书, ctrl+d退出容器内部
sudo docker cp es:/usr/share/elasticsearch/elastic-certificates.p12 .# 关闭这个容器sudo docker kill essudo docker rm es如此获取了证书。
生成密码我们首先要启动es集群，去里面生成密码。
sudo docker-compose up然后进入其中一台
sudo docker exec -it es01 /bin/bash生成密码用auto ，自己设置用 interactive
[root@cfeeab4bb0eb elasticsearch]# ./bin/elasticsearch-setup-passwords -hSets the passwords for reserved usersCommands--------auto - Uses randomly generated passwordsinteractive - Uses passwords entered by a userNon-option arguments:commandOptionDescription ----------------- -E Configure a setting-h, --helpShow help-s, --silentShow minimal output-v, --verboseShow verbose output[root@cfeeab4bb0eb elasticsearch]# ./bin/elasticsearch-setup-passwords autoInitiating the setup of passwords for reserved users elastic,apm_system,kibana,logstash_system,beats_system,remote_monitoring_user.The passwords will be randomly generated and printed to the console.Please confirm that you would like to continue [y/N]yChanged password for user apm_systemPASSWORD apm_system = YxVzeT9B2jEDUjYp66WsChanged password for user kibanaPASSWORD kibana = 8NnThbj0N02iDaTGhidUChanged password for user logstash_systemPASSWORD logstash_system = 9nIDGe7KSV8SQidSk8DjChanged password for user beats_systemPASSWORD beats_system = qeuVaf1VEALpJHfEUOjJChanged password for user remote_monitoring_userPASSWORD remote_monitoring_user = DtZCrCkVTZsinRn3tW3DChanged password for user elasticPASSWORD elastic = q5f2qNfUJQyvZPIz57MZ
使用密码浏览器访问localhost:9200/9201/9202 需要输入账号
输入对应的elastic/password就好
浏览器访问localhost:5601
docker安装Elasticsearch7.6集群并设置密码的方法步骤

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忘记密码如果生成后忘记密码了怎么办，可以进入机器去修改。
进入es的机器
sudo docker exec -it es01 /bin/bash创建一个临时的超级用户RyanMiao
./bin/elasticsearch-users useradd ryan -r superuserEnter new password: ERROR: Invalid password...passwords must be at least [6] characters long[root@cfeeab4bb0eb elasticsearch]# ./bin/elasticsearch-users useradd ryan -r superuserEnter new password: Retype new password: 用这个用户去修改elastic的密码：
curl -XPUT -u ryan:ryan123 http://localhost:9200/_xpack/security/user/elastic/_password -H "Content-Type: application/json" -d '{"password": "q5f2qNfUJQyvZPIz57MZ"}'参考 http://codingfundas.com/setting-up-elasticsearch-6-8-with-kibana-and-x-pack-security-enabled/index.html
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