Cloudera Manager and CDH come with an embedded PostgreSQL database, which is called the non-production environment. The embedded PostgreSQL database is not supported in production environments. For production environments, we must configure our cluster to use dedicated external databases like MySQL, MariaDB, PostgreSQL or Oracle database.
- Cloudera Manager Guide
- Cloudera Manager Installer Bin Download Windows
- Cloudera Manager Tutorial
- Cloudera Manager Installation
- Download Cloudera Manager
- Cloudera Manager 6
- Case-1 [When Cloudera Manager Server and MySQL database is in two different instances] Now we have to create the Cloudera Manager Server Database. Make sure that the JDBC connector has been installed in all the nodes. If you have not installed it yet then use the following command: sudo yum -y install mysql-connector*.
- Download cloudera-manager.repo for yum repository Download cloudera-manager.bin from cloudera archive Installing cloudera-manager.bin using local CM repository Starting Cloudera Manager Service.
- It will not work as cloudera-manager-installer.bin is a 64-bit software and will not run on a 32-bit. This section is merely preserved for completeness; and as a place-holder.
We will be installing MySQL 5.7 which is supported by Cloudera. I have tried MySQL 8.0 version but I faced a great number of errors so it’s better to take version 5.7
- Download the tar file of MySql 5.7 (Link given below).
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sudo wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.24-1.el7.x86_64.rpm-bundle.tar
- Extract the tar file using the below command
sudo tar -xvf mysql-5.7.24-1.el7.x86_64.rpm-bundle.tar
- Before installing MySQL, remove mariadb
sudo yum -y remove mariadb*
Once extracted, install the following in the following order otherwise it will through errors.
- sudo rpm -ivh mysql-community-common-5.7.24-1.el7.x86_64.rpm
- sudo rpm -ivh mysql-community-libs-*
- sudo rpm -ivh mysql-community-client-5.7.24-1.el7.x86_64.rpm
- sudo rpm -ivh mysql-community-server-5.7.24-1.el7.x86_64.rpm
Install MySQL connector sudo yum -y install mysql-connector*
Install mysql connector in all the nodes. Once installed, start MySQL service.
sudo systemctl start mysqld.service
After that, get the temporary password provided by mysql by the command:
grep ‘password’ /var/log/mysqld.log
Now, use the command to set your MySQL
sudo /usr/bin/mysql_secure_installation
- $ sudo /usr/bin/mysql_secure_installation
- […]
- Enter current password for root (enter for none):
- OK, successfully used password, moving on…
- […]
- Set root password? [Y/n] y
- New password:
- Re-enter new password:
- Remove anonymous users? [Y/n] Y
- […]
- Disallow root login remotely? [Y/n] N
- […]
- Remove test database and access to it [Y/n] Y
- […]
- Reload privilege tables now? [Y/n] Y
- All done!
Restart the MySQL Server
sudo systemctl restart mysqld.service
Instance-1
Log in as the user you have created. If you are using root then don’t switch.
As I have kept instance-1 as the manager machine so I will be installing Clouder manager repo file here. Use the below command.
sudo wget http://archive.cloudera.com/cm5/installer/5.13.1/cloudera-manager-installer.bin
Grant permission to the bin file downloaded.
sudo chmod u+x cloudera-manager-installer.bin
Install the cloudera-manager-installer.bin file
sudo ./cloudera-manager-installer.bin
Instance-2
Login to MySQL using the command:
sudo mysql -u root -p
Now, create databases and users for the components which need databases.
- Activity Monitor
create database amon default character set utf8;
grant all on amon.* to ‘amon’@’%’ identified by ‘Amon@123’;
- Report Manager
create database rman default character set utf8;
grant all on rman.* to ‘rman’@’%’ identified by ‘Amon@123’;
- Hive Metastore Server
create database metastore default character set utf8;
grant all on metastore.* to ‘hive’@’%’ identified by ‘Amon@123’;
- Sentry Server
create database sentry default character set utf8;
grant all on sentry.* to ‘sentry’@’%’ identified by ‘Amon@123’;
- Cloudera Navigator Audit Server
create database nav default character set utf8;
grant all on nav.* to ‘nav’@’%’ identified by ‘Amon@123’;
- Cloudera Navigator Metadata Server
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create database navms default character set utf8;
grant all on navms.* to ‘navms’@’%’ identified by ‘Amon@123’;
- Oozie
create database oozie default character set utf8;
grant all privileges on oozie.* to ‘oozie’@’localhost’ identified by ‘Amon@123’;
grant all privileges on oozie.* to ‘oozie’@’%’ identified by ‘Amon@123’;
- Hue
create database hue default character set utf8;
grant all on hue.* to ‘hue’@’%’ identified by ‘Amon@123’;
Instance-1
Case-1 [When Cloudera Manager Server and MySQL database is in two different instances]
Now we have to create the Cloudera Manager Server Database. Make sure that the JDBC connector has been installed in all the nodes. If you have not installed it yet then use the following command:
Cloudera Manager Installer Bin Download Windows
sudo yum -y install mysql-connector*
At the instance where MySQL is installed (in my case it is instance-2), create a temporary user who can connect from instance-1, the node where Cloudera Manager Server is installed.
grant all on *.* to ‘temp’@’%’ identified by ‘Scm@@123’ with grant option;
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Now on Cloudera Manager Server host (Instance-1), run the following script:
sudo /usr/share/cmf/schema/scm_prepare_database.sh mysql -h instance-2.asia-south1-a.c.phonic-embassy-220605.internal -P 3306 -u temp -p –scm-host instance-1.asia-south1-a.c.phonic-embassy-220605.internal scm scm Amon@123
In the above script,
mysql is the database-type
–h is the parameter used for specifying the hostname. instance-2.asia-south1-a.c.phonic-embassy-220605.internal is the hostname for the node where my MySQL is installed.
–P is used for specifying the port. 3306 is the port for MySQL.
–u used for the user. temp is the temporary user which we have created.
–p is for specifying the database password. Keep it blank as it will ask you later.
--scm-host is used to provide the hostname of Cloudera Manager Server. instance-1.asia-south1-a.c.phonic-embassy-220605.internal is the hostname of instance-1 where the Cloudera Manager Server is installed.
Now, delete the temporary user from Instance-2
drop user ‘temp’@’%’;
On Instance-1 where CM is installed, go to /etc/cloudera-scm-server directory and remove the embedded PostgreSQL properties file if it exists.
Cloudera Manager Tutorial
sudo rm db.mgmt.properties
After removing db.mgmt.properties file, restart the Cloudera-scm-server so that it accepts the changes.
Cloudera Manager Installation
sudo service cloudera-scm-server restart Case-2 [When Cloudera Manager Server and MySQL database is in the same node]Login into MySQL and create a temporary user.
grant all on *.* to ‘temp’@’%’ identified by ‘Scm@@123’ with grant option;
Use the below command to create scm database.
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sudo /usr/share/cmf/schema/scm_prepare_database.sh mysql -h instance-2.asia-east1-a.c.phonic-embassy-220605.internal -P 3306 -u temp -p –scm-host instance-2.asia-east1-a.c.phonic-embassy-220605.internal scm scm Amon@123
Once created, log in to MySQL and drop the temporary user which we had created
drop user ‘temp’@’%’;
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Remove the db.mgmt.properties file present in the location /etc/Cloudera-scm-server
sudo rm db.mgmt.properties
Now, restart the Cloudera-scm-server sudo service cloudera-scm-server restart
Cloudera Manager 6
This is the end of “Installing and configuring MySQL database for Cloudera Softwares”. Once done, you can proceed for the further installation process.
If you face any issue then feel free to reach me at ([email protected]) or you can ask in the comment section as well.
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