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2.3.2 元数据库之Mysql
- 直连模式示意图:
2.MySQL安装部署 1)检查当前系统是否安装过Mysql,如果存在就是用下列命令移除,如果不存在则忽略。(一定要做这一步) [atguigu@hadoop102 hive] sudo rpm -e --nodeps mariadb-libs //用此命令卸载mariadb 2)将MySQL安装包上传到/opt/software目录下 [atguigu@hadoop102 software] mkdir /opt/software/mysql_jars [atguigu@hadoop102 software]$ tar -xf /opt/software/mysql-5.7.28-1.el7.x86_64.rpm-bundle.tar -C /opt/software/mysql_jars 4)查看mysql_jars目录下解压后的文件如下:
[atguigu@hadoop102 software]$ cd /opt/software/mysql_jars
[atguigu@hadoop102 mysql_jars]$ ll
总用量 595272
-rw-r--r--. 1 atguigu atguigu 45109364 9月 30 2019 mysql-community-client-5.7.28-1.el7.x86_64.rpm
-rw-r--r--. 1 atguigu atguigu 318768 9月 30 2019 mysql-community-common-5.7.28-1.el7.x86_64.rpm
-rw-r--r--. 1 atguigu atguigu 7037096 9月 30 2019 mysql-community-devel-5.7.28-1.el7.x86_64.rpm
-rw-r--r--. 1 atguigu atguigu 49329100 9月 30 2019 mysql-community-embedded-5.7.28-1.el7.x86_64.rpm
-rw-r--r--. 1 atguigu atguigu 23354908 9月 30 2019 mysql-community-embedded-compat-5.7.28-1.el7.x86_64.rpm
-rw-r--r--. 1 atguigu atguigu 136837816 9月 30 2019 mysql-community-embedded-devel-5.7.28-1.el7.x86_64.rpm
-rw-r--r--. 1 atguigu atguigu 4374364 9月 30 2019 mysql-community-libs-5.7.28-1.el7.x86_64.rpm
-rw-r--r--. 1 atguigu atguigu 1353312 9月 30 2019 mysql-community-libs-compat-5.7.28-1.el7.x86_64.rpm
-rw-r--r--. 1 atguigu atguigu 208694824 9月 30 2019 mysql-community-server-5.7.28-1.el7.x86_64.rpm
-rw-r--r--. 1 atguigu atguigu 133129992 9月 30 2019 mysql-community-test-5.7.28-1.el7.x86_64.rpm
5)在/opt/software/mysql_jars目录下执行rpm安装,严格按照如下顺序执行
sudo rpm -ivh mysql-community-common-5.7.28-1.el7.x86_64.rpm
sudo rpm -ivh mysql-community-libs-5.7.28-1.el7.x86_64.rpm
sudo rpm -ivh mysql-community-libs-compat-5.7.28-1.el7.x86_64.rpm
sudo rpm -ivh mysql-community-client-5.7.28-1.el7.x86_64.rpm
sudo rpm -ivh mysql-community-server-5.7.28-1.el7.x86_64.rpm
注意: linux采用最小化安装会存在问题。 6)如果在mysql的数据存储路径下有文件存在,需要将其全部删除,存储路径地址在/etc/my.cnf文件中datadir参数所对应的值: ·查看datadir的值: [atguigu@hadoop102 etc] cd /var/lib/mysql [root@hadoop102 mysql] sudo mysqld --initialize --user=mysql 8)初始化完成后,查看临时生成的root用户的密码,也是首次登录msql的密码
[atguigu@hadoop102 module]$ sudo cat /var/log/mysqld.log
2021-10-18T08:50:32.172049Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2021-10-18T08:50:32.364322Z 0 [Warning] InnoDB: New log files created, LSN=45790
2021-10-18T08:50:32.397350Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2021-10-18T08:50:32.453522Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 73e2af3c-2ff0-11ec-af41-000c29830057.
2021-10-18T08:50:32.454765Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2021-10-18T08:50:32.978960Z 0 [Warning] CA certificate ca.pem is self signed.
2021-10-18T08:50:33.314317Z 1 [Note] A temporary password is generated for root@localhost: OU+*c.C9FZy;
9)启动MySQL服务 [atguigu@hadoop102 module] mysql -uroot -p Enter password: (你的暂时密码) //输入临时生成的密码 11)必须先修改root用户的密码,否则执行其他的操作会报错 mysql> set password = password("新密码"); 12)修改mysql库下的user表中的root用户允许任意ip连接 mysql> update mysql.user set host='%' where user='root'; 13)刷新,使得修改生效 mysql> flush privileges; 3.配置Hive元数据库为MySql
- 拷贝驱动 Hive需要将元数据信息存储到元数据库mysql中,需要使用JDBC的方式连接到MySQL,所以,将MySQL的JDBC驱动拷贝到Hive的lib目录下,供hive调用。 [atguigu@hadoop102 software]$ cp mysql-connector-java-5.1.37.jar /opt/module/hive/lib 2)配置Metastore到MySql 在/opt/module/hive/conf目录下新建hive-site.xml文件(新建的配置文件中的配置会覆盖默认配置)
[atguigu@hadoop102 hive]$ vim conf/hive-site.xml
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
<!-- jdbc连接的URL -->
<property>
<name>javax.jdo.option.ConnectionURL</name>
<value>jdbc:mysql://hadoop102:3306/metastore?useSSL=false</value>
</property>
<!-- jdbc连接的Driver-->
<property>
<name>javax.jdo.option.ConnectionDriverName</name>
<value>com.mysql.jdbc.Driver</value>
</property>
<!-- jdbc连接的username-->
<property>
<name>javax.jdo.option.ConnectionUserName</name>
<value>root</value>
</property>
<!-- jdbc连接的password -->
<property>
<name>javax.jdo.option.ConnectionPassword</name>
<value>123456</value>
</property>
<!-- Hive默认在HDFS的工作目录 -->
<property>
<name>hive.metastore.warehouse.dir</name>
<value>/user/hive/warehouse</value>
</property>
<!-- Hive元数据存储的验证 -->
<property>
<name>hive.metastore.schema.verification</name>
<value>false</value>
</property>
<!-- 元数据存储授权 -->
<property>
<name>hive.metastore.event.db.notification.api.auth</name>
<value>false</value>
</property>
</configuration>