ES 手册安装

 

 ES版本为： 8.11.4

JAVA 版本用 11版本. 务必！！！！！！！！【默认也行，不必11】

 

[root@es1 bin]# pwd
/opt/elasticsearch-8.11.4/bin

 

 

集群配置文件 不带密码的 ：

ES1

 

[root@es8 config]# vi elasticsearch.yml 


#-----------------------Cluster-----------------------
cluster.name: myes
#-----------------------Node-----------------------
node.name: es81-node
#-----------------------Paths-----------------------
path.data: /opt/elasticsearch-8.11.4/data
#-----------------------Memory-----------------------
bootstrap.memory_lock: false
#-----------------------Network-----------------------
network.host: es8
#-----------------------Discovery-----------------------
discovery.seed_hosts: ["es8","es8-2"]
cluster.initial_master_nodes: ["es81-node"]
xpack.security.enabled: false
#xpack.security.transport.ssl.enabled: false
#xpack.security.http.ssl:endabled: falsea

xpack.security.transport.ssl:
  enabled: false


xpack.security.http.ssl:
  enabled: false

 

ES2

 

#-----------------------Cluster-----------------------
cluster.name: myes
#-----------------------Node-----------------------
node.name: es81-node
#-----------------------Paths-----------------------
path.data: /opt/elasticsearch-8.11.4/data
#-----------------------Memory-----------------------
bootstrap.memory_lock: false
#-----------------------Network-----------------------
network.host: es8
#-----------------------Discovery-----------------------
discovery.seed_hosts: ["es8","es8-2"]
#cluster.initial_master_nodes: ["es81-node"]
xpack.security.enabled: false



xpack.security.transport.ssl:
  enabled: false


xpack.security.http.ssl:
  enabled: false

 

 

 

 

 

config 配置文件的配置：

 

#-----------------------Cluster-----------------------
cluster.name: myes
#-----------------------Node-----------------------
node.name: node102
#-----------------------Paths-----------------------
path.data: /opt/module/elasticsearch/data
#-----------------------Memory-----------------------
bootstrap.memory_lock: false
#-----------------------Network-----------------------
network.host: es1 
#-----------------------Discovery-----------------------
discovery.seed_hosts: ["es1", "es1","es1"]
cluster.initial_master_nodes: ["es1"]

#最好如下参数也配置上 .
xpack.security.enabled: false

 ‘

请注意如下是单节点模式配置  single’

cluster.name: myes
#-----------------------Node-----------------------
node.name: node1
#-----------------------Paths-----------------------
path.data: /opt/elasticsearch-8.11.4/data
#-----------------------Memory-----------------------
bootstrap.memory_lock: false
#-----------------------Network-----------------------
network.host: es1
#-----------------------Discovery-----------------------
##不是集群就把下面的注释掉
discovery.seed_hosts: ["es1", "es1","es1"]
#cluster.initial_master_nodes: ["node1"]
单节点模式的配置

discovery.type: single-node  
xpack.security.enabled: false

 这个也是单节点模式，之前一直报错，复制的配置文件

 

#-----------------------Cluster-----------------------
cluster.name: myes
#-----------------------Node-----------------------
node.name: node1
#-----------------------Paths-----------------------
path.data: /opt/elasticsearch-8.11.4/data
#-----------------------Memory-----------------------
bootstrap.memory_lock: false
#-----------------------Network-----------------------
network.host: hdp01
#-----------------------Discovery-----------------------
discovery.seed_hosts: ["hdp01"]
#cluster.initial_master_nodes: ["es75"]

discovery.type: single-node

 

 

 

2.2.2 调整linux内核参数
1）切换到root用户，编辑limits.conf 添加类似如下内容
[root@hadoop102 elasticsearch]# vi /etc/security/limits.conf
添加如下内容:
* soft nofile 65536
* hard nofile 131072
* soft nproc 2048
* hard nproc 4096
注意：“*” 不要省略掉。以上操作为增加Linux文件系统中可以同时打开的文件句柄数。
2）切换到root用户修改配置sysctl.conf
[root@hadoop102 elasticsearch]# vi /etc/sysctl.conf
添加下面配置：
vm.max_map_count=655360
以上修改的Linux配置需要分发至其他节点
然后，重新启动Linux，必须重启！！！

 

 

 
    groupadd esgroup
    useradd -g esgroup esuser
    chown -R esuser:esgroup /opt/elasticsearch-8.11.4
    passwd esuser




    密码为： esuser123
    //切换用户

 

为elaticsearch创建用户并赋予相应权限（推荐）

    //创建用户组 
    groupadd esgroup
     
    //创建用户
    useradd -g esgroup esuser
     
    //设置权限
    chown -R esuser:esgroup /opt/elasticsearch-8.11.4
     
    //设置密码
    passwd esuser
    密码为： esuser123
    //切换用户
    su  esuser
     
    //重新启动elaticsearch
    ./bin/elasticsearch
 

 

KIBANA配置文件：

server.host: "es75"
elasticsearch.hosts: ["http://es75:9200"]
i18n.locale: "zh-CN"

 

 

 

# NOTE: Elasticsearch comes with reasonable defaults for most settings.
#       Before you set out to tweak and tune the configuration, make sure you
#       understand what are you trying to accomplish and the consequences.
#
# The primary way of configuring a node is via this file. This template lists
# the most important settings you may want to configure for a production cluster.
#
# Please consult the documentation for further information on configuration options:
# https://www.elastic.co/guide/en/elasticsearch/reference/index.html
#
# ---------------------------------- Cluster -----------------------------------
#
# Use a descriptive name for your cluster:
#
#cluster.name: my-application
#
# ------------------------------------ Node ------------------------------------
#
# Use a descriptive name for the node:
#
#node.name: node-1
#
# Add custom attributes to the node:
#
#node.attr.rack: r1
#
# ----------------------------------- Paths ------------------------------------
#
# Path to directory where to store the data (separate multiple locations by comma):
#
#path.data: /path/to/data
#
# Path to log files:
#
#path.logs: /path/to/logs
#


------------------------ Memory -----------------------------------
#
# Lock the memory on startup:
#
#bootstrap.memory_lock: true
#
# Make sure that the heap size is set to about half the memory available
# on the system and that the owner of the process is allowed to use this
# limit.
#
# Elasticsearch performs poorly when the system is swapping the memory.
#
# ---------------------------------- Network -----------------------------------
#
# By default Elasticsearch is only accessible on localhost. Set a different
# address here to expose this node on the network:
#
#network.host: 192.168.0.1
#
# By default Elasticsearch listens for HTTP traffic on the first free port it
# finds starting at 9200. Set a specific HTTP port here:
#
#http.port: 9200
#
# For more information, consult the network module documentation.
#
# --------------------------------- Discovery ----------------------------------
#
# Pass an initial list of hosts to perform discovery when this node is started:
# The default list of hosts is ["127.0.0.1", "[::1]"]
#
#discovery.seed_hosts: ["host1", "host2"]
#
# Bootstrap the cluster using an initial set of master-eligible nodes:
#
#cluster.initial_master_nodes: ["node-1", "node-2"]
#
# For more information, consult the discovery and cluster formation module documentation.
#
# ---------------------------------- Various -----------------------------------
#
# Allow wildcard deletion of indices:
#
#action.destructive_requires_name: false

 

 

创建hive es外表。

CREATE EXTERNAL TABLE my_table (  

  id INT,  

  name STRING,  

  age INT  

)  ROW FORMAT SERDE 
'org.elasticsearch.hadoop.hive.EsSerDe' 

STORED BY 'org.elasticsearch.hadoop.hive.EsStorageHandler'

TBLPROPERTIES (  

   'es.index.auto.create'= 'true',
  'es.port' = '9200',  
  'es.net.http.auth.user' = 'elastic'
  'es.net.http.auth.pass' = 'elastic'
  'es.resource' = 'mytable',  
  'es.nodes' = '192.168.9.237',  
  'es.index.auto.create' = 'true',  
  'es.write.operation' = 'upsert'  

);

创建表报如下错误： 

elasticsearch - 失败:SemanticException找不到类 'org.elasticsearch.hadoop.hive.ESStorageHandler
Error: Error while compiling statement: FAILED: SemanticException Cannot find class 'org.elasticsearch.hadoop.hive.EsStorageHandler' (state=42000,code=40000)



网上的解决办法如下： 

在$ HIVE_HOME / lib文件夹中添加 elasticsearch-hadoop-2.3.0.jar 和 elasticsearch-hadoop-hive-2.3.0.jar 文件后，我解决了该问题。

我的解决办法是 ： 我的是 8.11.4 的es  
放到hive 的lib目录下
elasticsearch-hadoop-8.11.4.jar
elasticsearch-hadoop-hive-8.11.4.jar
这两个即可.
据说.

 

 

 

 curl -XGET 192.168.9.201:9200/_cat/indices?v              # Linux
 /_cat/indices?v                                           # Kinaba
 http://192.168.9.201:9200/_cat/indices?v                  # WebUI

 

查看系统是否装nfs了.
rpm -qa nfs-utils
rpm -qa rpcbind


--在新的节点上配置. 
vi /etc/idmapd.conf 
Domain = 192.168.9.241

--编辑 /etc/exports
/cloud/data02/nfs_data 192.168.9.0/24(rw,sync,insecure,no_subtree_check,no_root_squash)

--开机启动设置.
systemctl enable --now rpcbind nfs-server


--启动命令.[这个服务必须重启]

sudo systemctl restart  nfs-server.service   -- status


--生效命令.
sudo exportfs -r


确保老集群中安装了nfs 
rpm -qa nfs-utils
rpm -qa rpcbind


/cloud/data02/nfs_data 192.168.9.0/24(rw,sync,insecure,no_subtree_check,no_root_squash)
-- 在老集群上挂载 ：
mount -t nfs 192.168.9.242:/cloud/data02/nfs_data /data/backups/my_backup

--在客户端查看挂载情况.
df -h

--在服务端查看
showmount -e


---每个节点上都要挂载一遍.
--查看ntf状态.
 
 --在服务端挂载的目录新建个文件夹，看看客户端能不能获取到这个文件。
 
 
 
 
 --- 每个就集群 elasticsearch.yml 文件 
 修改elastticsearch.yml配置文件指定snapshot的共享目录：
--旧集群指定：/data/backups/my_backup
path.repo: ["/data/backups/my_backup"]
-- 修改所属群组使得es可以写入
chown -R es:es /data/backups/my_backup
chmod 777 /data/backups/my_backup



--新集群指定到/cloud/data01/backup
path.repo: [“/cloud/data01/”]
backup
mkdir -p  /cloud/data01/backup
chown -R es:es /cloud/data01/backup
chmod 777 /cloud/data01/backup



-- 修改elasticsearch.yml配置文件并重启集群,重启ES各节点



---重启集群 

修改elasticsearch.yml配置文件并重启集群,重启ES各节点
重启两个es集群，先杀掉es进程( tips:一台一台重启比较集群恢复比较快一点 )

jps查看es进程id
kill -9 es进程id 
su es
bin/elasticsearch -d


先禁用两个集群的自动分配：
在两个集群其中一台上面执行即可：
关闭：
curl -XPUT http://127.0.0.1:9200/_cluster/settings -d '{ "transient": {"cluster.routing.allocation.enable": "none"} }'
  
 
 
3.4.2.ES旧集群创建快照仓库
登录kibana,进入dev tools输入如下指令
#先建立旧集群索引快照库：
#先建立旧集群索引快照库：


chown esuser:esuser -R my_backup/


--如下直接执行.
PUT /_snapshot/my_backup
{
  "type": "fs",
  "settings": {
    "compress": true,
    "location": "/data/backups/my_backup"
  }
}


-- 
PUT /_snapshot/my_backup
{  "type": "fs",  "settings": {    "compress": true,    "location": "/data/backups/my_backup"  }}

curl -XPUT "http://localhost:9200/_snapshot/my_backup" -H 'Content-Type: application/json' -d'{  "type": "fs",  "settings": {    "compress": true,    "location": "/data/backups/my_backup"  }}'
 


3.4.4.ES新集群创建快照仓库

chown es:es backup/
PUT /_snapshot/my_backup
{
  "type": "fs",
  "settings": {
    "compress": true,
"location": "/cloud/data01/backup",
"readonly": true
  }
}

























###报错原因：
{
  "error": {
    "root_cause": [
      {
        "type": "exception",
        "reason": "failed to create blob container"
      }
    ],
    "type": "exception",
    "reason": "failed to create blob container",
    "caused_by": {
      "type": "access_denied_exception",
      "reason": "/data/backups/my_backup/tests-FV56JqXyTxaTa5qbXUms6w"
    }
  },
  "status": 500
}

如下命令执行:
chown -R es:es /data/backups/my_backup