CDH的启动和停止步骤

一 启动

1.启动MySQL服务

[root@hadoop001 ~]# su - mysqladmin
Last login: Thu Oct 24 14:23:45 CST 2019 on pts/0
hadoop001:mysqladmin:/usr/local/mysql:>service mysql start
Starting MySQL..[  OK  ]
hadoop001:mysqladmin:/usr/local/mysql:>service mysql status
MySQL running (3882)[  OK  ]
hadoop001:mysqladmin:/usr/local/mysql:>

2.启动httpd服务
 

[root@hadoop001 /]# service httpd status
Redirecting to /bin/systemctl status  httpd.service
● httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled; vendor preset: disabled)
   Active: inactive (dead)
     Docs: man:httpd(8)
           man:apachectl(8)
[root@hadoop001 /]# service httpd start
Redirecting to /bin/systemctl start  httpd.service
[root@hadoop001 /]# service httpd status
Redirecting to /bin/systemctl status  httpd.service
● httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled; vendor preset: disabled)
   Active: active (running) since Fri 2019-10-25 12:03:36 CST; 5s ago
     Docs: man:httpd(8)
           man:apachectl(8)
 Main PID: 4123 (httpd)
   Status: "Processing requests..."
   CGroup: /system.slice/httpd.service
           ├─4123 /usr/sbin/httpd -DFOREGROUND
           ├─4124 /usr/sbin/httpd -DFOREGROUND
           ├─4125 /usr/sbin/httpd -DFOREGROUND
           ├─4126 /usr/sbin/httpd -DFOREGROUND
           ├─4127 /usr/sbin/httpd -DFOREGROUND
           └─4128 /usr/sbin/httpd -DFOREGROUND

Oct 25 12:03:36 hadoop001 systemd[1]: Starting The Apache HTTP Server...
Oct 25 12:03:36 hadoop001 httpd[4123]: AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using 172.17.238.189. Set the 'ServerName' direc...this message
Oct 25 12:03:36 hadoop001 systemd[1]: Started The Apache HTTP Server.
Hint: Some lines were ellipsized, use -l to show in full.
[root@hadoop001 /]# 

2.在主节点上启动server服务，等待一分钟，看日志出现7183字样，表明启动成功

[root@hadoop001 /]# /opt/cloudera-manager/cm-5.16.1/etc/init.d/cloudera-scm-server start
Starting cloudera-scm-server:                              [  OK  ]

3.在所有节点启动agent服务

[root@hadoop001 /]# /opt/cloudera-manager/cm-5.16.1/etc/init.d/cloudera-scm-agent start
Starting cloudera-scm-agent:                               [  OK  ]

4.登陆WebUI界面，启动CMS服务（5个Roles）

5.启动Cluster服务

二 停止

停止CDH就是开启的相反步骤
1.先停止Cluster集群服务
2.停止CM服务
3.在各个节点上停止Agent
/opt/cloudera-manager/cm-5.16.1/etc/init.d/cloudera-scm-agent stop
4.在主节点上停止Server
/opt/cloudera-manager/cm-5.16.1/etc/init.d/cloudera-scm-server stop