how to install CDH6.2 on centos7¶

set hostname

hostnamectl set-hostname h1
hostnamectl set-hostname h2
hostnamectl set-hostname h3

set hosts

168.1.1 h1
168.1.2 h2
168.1.3 h3

disable selinux and firewalld

sed -i 's/^SELINUX=.*$/SELINUX=disabled/g' /etc/selinux/config
setenforce 0
systemctl stop firewalld
systemctl disable firewalld

add crontab

yum install rdate pssh -y
pssh -h host.txt -l root -i -O StrictHostKeyChecking=no -A sh -c 'crontab -l |(cat;echo "*/5 * * * * /usr/bin/rdate -s time.nist.gov")| crontab -'

download repo file

curl -o /etc/yum.repos.d/cloudera-manager.repo https://archive.cloudera.com/cm6/6.2.0/redhat7/yum/cloudera-manager.repo
rpm --import https://archive.cloudera.com/cm6/6.2.0/redhat7/yum/RPM-GPG-KEY-cloudera

install jdk
```
yum install oracle-j2sdk1.8 -y
```

install cm

yum install cloudera-manager-daemons cloudera-manager-agent cloudera-manager-server -y

install mysql5.6

yum install http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm -y
yum install mysql-server -y

cat << EOF > /etc/my.cnf
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
transaction-isolation = READ-COMMITTED
# Disabling symbolic-links is recommended to prevent assorted security risks;
# to do so, uncomment this line:
symbolic-links = 0

key_buffer_size = 32M
max_allowed_packet = 32M
thread_stack = 256K
thread_cache_size = 64
query_cache_limit = 8M
query_cache_size = 64M
query_cache_type = 1

max_connections = 550
#expire_logs_days = 10
#max_binlog_size = 100M

#log_bin should be on a disk with enough free space.
#Replace '/var/lib/mysql/mysql_binary_log' with an appropriate path for your
#system and chown the specified folder to the mysql user.
log_bin=/var/lib/mysql/mysql_binary_log

#In later versions of MySQL, if you enable the binary log and do not set
#a server_id, MySQL will not start. The server_id must be unique within
#the replicating group.
server_id=1

binlog_format = mixed

read_buffer_size = 2M
read_rnd_buffer_size = 16M
sort_buffer_size = 8M
join_buffer_size = 8M

# InnoDB settings
innodb_file_per_table = 1
innodb_flush_log_at_trx_commit  = 2
innodb_log_buffer_size = 64M
innodb_buffer_pool_size = 4G
innodb_thread_concurrency = 8
innodb_flush_method = O_DIRECT
innodb_log_file_size = 512M

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

sql_mode=STRICT_ALL_TABLES
EOF

systemctl enable mysqld
systemctl start mysqld
/usr/bin/mysql_secure_installation

install mysql jdbc driver

wget https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-5.1.46.tar.gz
tar zxvf mysql-connector-java-5.1.46.tar.gz
mkdir -p /usr/share/java/
cd mysql-connector-java-5.1.46
cp mysql-connector-java-5.1.46-bin.jar /usr/share/java/mysql-connector-java.jar

create database

mysql -u root -p

CREATE DATABASE scm DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
GRANT ALL ON scm.* TO 'scm'@'%' IDENTIFIED BY 'chenshi';
CREATE DATABASE amon DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
GRANT ALL ON amon.* TO 'amon'@'%' IDENTIFIED BY 'chenshi';
CREATE DATABASE rman DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
GRANT ALL ON rman.* TO 'rman'@'%' IDENTIFIED BY 'chenshi';
CREATE DATABASE hue DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
GRANT ALL ON hue.* TO 'hue'@'%' IDENTIFIED BY 'chenshi';
CREATE DATABASE metastore DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
GRANT ALL ON metastore.* TO 'hive'@'%' IDENTIFIED BY 'chenshi';
CREATE DATABASE sentry DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
GRANT ALL ON sentry.* TO 'sentry'@'%' IDENTIFIED BY 'chenshi';
CREATE DATABASE nav DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
GRANT ALL ON nav.* TO 'nav'@'%' IDENTIFIED BY 'chenshi';
CREATE DATABASE navms DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
GRANT ALL ON navms.* TO 'navms'@'%' IDENTIFIED BY 'chenshi';
CREATE DATABASE oozie DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
GRANT ALL ON oozie.* TO 'oozie'@'%' IDENTIFIED BY 'chenshi';

set up database

/opt/cloudera/cm/schema/scm_prepare_database.sh mysql scm scm chenshi
/opt/cloudera/cm/schema/scm_prepare_database.sh mysql amon amon chenshi
/opt/cloudera/cm/schema/scm_prepare_database.sh mysql rman rman chenshi
/opt/cloudera/cm/schema/scm_prepare_database.sh mysql hue hue chenshi
/opt/cloudera/cm/schema/scm_prepare_database.sh mysql metastore hive chenshi
/opt/cloudera/cm/schema/scm_prepare_database.sh mysql sentry sentry chenshi
/opt/cloudera/cm/schema/scm_prepare_database.sh mysql nav nav chenshi
/opt/cloudera/cm/schema/scm_prepare_database.sh mysql navms navms chenshi
/opt/cloudera/cm/schema/scm_prepare_database.sh mysql oozie oozie chenshi

set up database
```
systemctl start cloudera-scm-server
```
now, you can visit http://h1:7180 to go on.