elasticsearch集群安装+安全验证+kibana安装

[](

)日志数据路径配置

• 配置方式

path.data: /opt/data/es

path.logs: /opt/log/es

path:

data: /opt/data/es

logs: /opt/log/es

• path.data, 可以设置多个目录

path:

logs: /opt/log/es

data:

• /opt/data/es-A
• /opt/data/es-B
• /opt/data/es-C

[](

)集群发现配置

• discovery.seed_hosts 配置方式如下

用于多个集群节点进行发现，组成集群

discovery.seed_hosts: [“192.168.1.10:9300”, “192.168.1.11”, “seeds.mydomain.com”]

discovery.seed_hosts:

• 192.168.1.10:9300

• 192.168.1.11

• seeds.mydomain.com

• cluster.initial_master_nodes 配置方式如下

用于集群在第一次启动时，指定可以参与选举的主节点列表 （node.master: true）

cluster.initial_master_nodes: [“es01”, “es02”, “es03”]

cluster.initial_master_nodes:

-es01

-es02

-es03

• discovery.seed_hosts 如果不配置，会自动监听本地回环地址 将本地多个elasticsearch实例加入到集群中。

[](

)jvm配置

• /opt/es/config/jvm.options (一般配置为机器内存大小的一半)

sed -i "s/-Xms1g/ 需要zi料+ 绿色徽【vip1024b】

-Xms"800m"/g" /opt/es/config/jvm.options

sed -i “s/-Xmx1g/-Xmx"800m”/g" /opt/es/config/jvm.options

配置Elasticsearch（本次测试配置）

[](

)es01

cluster.name: es-cluster-test

node.name: es01

path.logs: /opt/log/es

path.data: /opt/data/es

bootstrap.memory_lock: true

network.host: 0.0.0.0

http.port: 9200

transport.tcp.port: 9300

discovery.seed_hosts: [“172.16.1.236:9306”, “172.16.1.236:9307”]

cluster.initial_master_nodes: [“es01”, “es02”, “es03”]

[](

)es02

cluster.name: es-cluster-test

node.name: es02

path.logs: /opt/log/es

path.data: /opt/data/es

bootstrap.memory_lock: true

network.host: 0.0.0.0

http.port: 9200

transport.tcp.port: 9300

discovery.seed_hosts: [“172.16.1.236:9305”, “172.16.1.236:9307”]

cluster.initial_master_nodes: [“es01”, “es02”, “es03”]

[](

)es03

cluster.name: es-cluster-test

node.name: es03

path.logs: /opt/log/es

path.data: /opt/data/es

bootstrap.memory_lock: true

network.host: 0.0.0.0

http.port: 9200

transport.tcp.port: 9300

discovery.seed_hosts: [“172.16.1.236:9305”, “172.16.1.236:9306”]

cluster.initial_master_nodes: [“es01”, “es02”, “es03”]

启动Elasticsearch

[](

)启动

• 分别进入不同的容器启动elasticsearch
• 命令如下

/opt/es/bin/elasticsearch -d

[](

)查看容器状况（容器内）

• 查看集群是否启动成功

[elasticsearch@813bf8515935 /]$ curl localhost:9200/_cat/nodes

172.17.0.7 28 91 9 0.58 0.66 0.90 dilm - es02

172.17.0.6 15 91 5 0.58 0.66 0.90 dilm - es01

172.17.0.8 35 91 13 0.58 0.66 0.90 dilm * es03

• 查看当前节点

[elasticsearch@813bf8515935 /]$ curl localhost:9200

{

“name” : “es03”,

“cluster_name” : “es-cluster-test”,

“cluster_uuid” : “Syj18FUrR1GdnGzghBIacQ”,

“version” : {

“number” : “7.6.2”,

“build_flavor” : “default”,

“build_type” : “tar”,

“build_hash” : “ef48eb35cf30adf4db14086e8aabd07ef6fb113f”,

“build_date” : “2020-03-26T06:34:37.794943Z”,

“build_snapshot” : false,

“lucene_version” : “8.4.0”,

“minimum_wire_compatibility_version” : “6.8.0”,

“minimum_index_compatibility_version” : “6.0.0-beta1”

},

“tagline” : “You Know, for Search”

}

• 查看节点健康状况

[elasticsearch@813bf8515935 /]$ curl localhost:9200/_cat/health?v

epoch timestamp cluster status node.total node.data shards pri relo init unassign pending_tasks max_task_wait_time active_shards_percent

1605859559 08:05:59 es-cluster-test green 3 3 0 0 0 0 0 0

• 100.0%

[](

)查看容器状况（宿主机）

• 由于使用docker容器安装，因此也可以通过宿主机映射端口访问，本次测试宿主机为windows

开启集群安全验证

[](

)修改配置

• 分别在不同的Es节点修改配置开启安全验证

echo “xpack.security.enabled: true” >> /opt/es/config/elasticsearch.yml

echo “xpack.security.transport.ssl.enabled: true” >> /opt/es/config/elasticsearch.yml

[](

)生成证书

• 选择其中一个节点生成CA证书，默认情况下生成证书放在 /opt/es

#创建ca证书 /opt/es/bin/elasticsearch-certutil ca -v

[elasticsearch@c824e845075b es]$ /opt/es/bin/elasticsearch-certutil ca -v

This tool assists you in the generation of X.509 certificates and certificate

signing 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 used

to sign certificate when running in ‘cert’ mode.

Use the ‘ca-dn’ option if you wish to configure the ‘distinguished name’

of the certificate authority

By default the ‘ca’ mode produces a single PKCS#12 output file which holds:

• The CA certificate
• The CA’s private key

If you elect to generate PEM format certificates (the -pem option), then the output will

be a zip file containing individual files for the CA certificate and private key

Please enter the desired output file [elastic-stack-ca.p12]: #输入回车，使用默认

Enter password for elastic-stack-ca.p12 : #回车，暂不输入密码

• 与上一步骤同一个节点创建节点见认证用的证书

#创建节点间证书 /opt/es/bin/elasticsearch-certutil cert --ca elastic-stack-ca.p12

[elasticsearch@c824e845075b es]$ /opt/es/bin/elasticsearch-certutil cert --ca elastic-stack-ca.p12

This tool assists you in the generation of X.509 certificates and certificate

signing requests for use with SSL/TLS in the Elastic stack.

The ‘cert’ mode generates X.509 certificate and private keys.

• By default, this generates a single certificate and key for use

on a single instance.

• The ‘-multiple’ option will prompt you to enter details for multiple

instances and will generate a certificate and key for each one

• The ‘-in’ option allows for the certificate generation to be automated by describing

the details of each instance in a YAML file

• An instance is any piece of the Elastic Stack that requires an SSL certificate.

Depending on your configuration, Elasticsearch, Logstash, Kibana, and Beats

may all require a certificate and private key.

• The minimum required value for each instance is a name. This can simply be the

hostname, which will be used as the Common Name of the certificate. A full

distinguished name may also be used.

• A filename value may be required for each instance. This is necessary when the

name would result in an invalid file or directory name. The name provided here

is used as the directory name (within the zip) and the prefix for the key and

certificate files. The filename is required if you are prompted and the name

is not displayed in the prompt.

• IP addresses and DNS names are optional. Multiple values can be specified as a

comma separated string. If no IP addresses or DNS names are provided, you may

disable hostname verification in your SSL configuration.

• All certificates generated by this tool will be signed by a certificate authority (CA).
• The tool can automatically generate a new CA for you, or you can provide your own with the

-ca or -ca-cert command line options.

By default the ‘cert’ mode produces a single PKCS#12 output file which holds:

• The instance certificate
• The private key for the instance certificate
• The CA certificate

If you specify any of the following options:

• -pem (PEM formatted output)
• -keep-ca-key (retain generated CA key)
• -multiple (generate multiple certificates)
• -in (generate certificates from an input file)

then the output will be be a zip file containing individual certificate/key files

Enter password for CA (elastic-stack-ca.p12) : #暂留空

Please enter the desired output file [elastic-certificates.p12]: #默认

Enter password for elastic-certificates.p12 : #ca证书密码，此次为空

Certificates written to /opt/es/elastic-certificates.p12

This file should be properly secured as it contains the private key for

your instance.

This file is a self contained file and can be copied and used ‘as is’

For each Elastic product that you wish to configure, you should copy

this ‘.p12’ file to the relevant configuration directory

and then follow the SSL configuration instructions in the product guide.

For client applications, you may only need to copy the CA certificate and

configure the client to trust this certificate.

• 配置ES节点使用这个证书

将生成证书拷贝到 /opt/es/config/certs目录下

[elasticsearch@c824e845075b es]$ mkdir -p /opt/es/config/certs

[elasticsearch@c824e845075b config]$ mv /opt/es/elastic-* /opt/es/config/certs/

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Java面试准备

准确的说这里又分为两部分：

1. Java刷题
2. 算法刷题

Java刷题：此份文档详细记录了千道面试题与详解；

• 配置ES节点使用这个证书

将生成证书拷贝到 /opt/es/config/certs目录下

[elasticsearch@c824e845075b es]$ mkdir -p /opt/es/config/certs

[elasticsearch@c824e845075b config]$ mv /opt/es/elastic-* /opt/es/config/certs/

独家面经总结，超级精彩

本人面试腾讯，阿里，百度等企业总结下来的面试经历，都是真实的，分享给大家！

[外链图片转存中…(img-t9beFpr9-1710347497149)]

[外链图片转存中…(img-yc4vn5eZ-1710347497150)]

[外链图片转存中…(img-iigLRHyq-1710347497150)]

[外链图片转存中…(img-9R368t1L-1710347497150)]

Java面试准备

准确的说这里又分为两部分：

1. Java刷题
2. 算法刷题

Java刷题：此份文档详细记录了千道面试题与详解；

[外链图片转存中…(img-sgNcJ9Zw-1710347497151)]

[外链图片转存中…(img-TVRtYKBB-1710347497151)]