Cloudera Manager Installation

Installation of Cloudera Manager in CentOS 7

SELinux must be disable.
Check the SELinux status, sestatus:

# sestatus
SELinux status:          enabled
SELinuxfs mount:         /sys/fs/selinux
SELinux root directory:  /etc/selinux

To Disable SELinux, edit /etc/sysconfig/selinux
and change SELinux=enforcing to SELINUX=disabled
Then reboot the system.

Download the Cloudera Manager installer to the cluster host to which you are installing the Cloudera Manager Server:

# wget

Make it executable and run the installer

# chmod +x cloudera-manager-installer.bin
# ./cloudera-manager-installer.bin

Check the firewall rules, ensure that ports 7180 and 7182 are accessible on the Cloudera Manager Server.

# firewall-cmd --state
# firewall-cmd --zone=public --permanent --add-port=7180/tcp
# firewall-cmd --zone=public --permanent --add-port=7182/tcp

Start the Cloudera Manager Admin Console:
In a web browser, enter the Cloudera Manager URL:

Log into Cloudera Manager Admin Console:
Username: admin
Password: admin

Cloudera Hadoop Node Requirements

Hostnames needs to be full FQDN, example:


Setup ntpdate

# systemctl enable ntpdate
# systemctl start ntpd
# sed -i_bak "s/\(nameserver\) .*/\1" /etc/resolv.conf
# ntpdate -u is the gateway


Cloudera recommends setting /proc/sys/vm/swappiness to a maximum of 10

# sysctl vm.swappiness=10

and add
vm.swappiness = 10
to /etc/sysctl.conf make it permanent.


Transparent Huge Page Compaction when enabled can cause significant performance problem, disable it by running:

# echo never > /sys/kernel/mm/transparent_hugepage/enabled
# echo never > /sys/kernel/mm/transparent_hugepage/defrag

And then add the same command to an init script as /etc/rc.local so it will be set on system reboot.