"Hadoop" 4, Hadoop installation Cloudera Manager (2)

8. Configure SSH password-free login

And after that, the back is mended.

Enter. SSH inside

This will generate a hidden file. SSH, enter this folder, and then append the public key to the Authorized_keys file, which does not initially exist, but is automatically generated when the append command is executed:

cd .ssh cat id_rsa.pub >> authorized_keys

Verify this machine

# Ssh-copy-id 192.168.42.99

# Ssh-copy-id 192.168.42.100

...

(10.0.7.238 is the specific person you want to avoid key, you have to set and self-free key)

Verifying other clients

Other empathy

9, Configuration Time synchronization

Let's configure the DNS here first

[Email protected] ~]# vi/etc/resolv.conf

Remember to open the NTPD service when you're done configuring

/ETC/INIT.D/NTPD start

9.1 Using an existing NTP Server

Assuming that the IP of NTP server already exists in the local area network is 192.168.1.2, the command is run:

# ntpdate 192.168.1.2

A similar statement appears stating that synchronization succeeded

27Jun 10:12:01 ntpdate[25475]: Adjust time server NtpServer offset-0.127154 sec

If you need to synchronize the BIOS time

# hwclock-w

To configure timed synchronization, you need to use crontab, using the root user:

# CRONTAR-E

Write:

*/5 * * * * root ntpdate 192.168.1.2 && hwclock-w

This automatically synchronizes the system every 5 minutes.

Common exceptions:

error1: ntpdate[2748]:the NTP socket is on use, exiting

Client end to turn off the NTP service.

Service ntpd Stop

Error2:no server suitable for synchronization found

NTP server start syncing 5 minutes later.

Part of the primary node that needs to be set

10. Configuring CM Source Files (Apache)

10.1. Put the file in the specified directory

Create the appropriate directory

#mkdir/VAR/WWW/HTML/CDH

#mkdir/var/www/html/cdh/cm5.2.0

#mkdir/var/www/html/cdh/cm5.2.0/package (cm rpm file)

10.2 Creating the appropriate cm yum

Create a yum warehouse using the Createrepo command

Installation: deltarpm-3.5-0.5.20090913git.el6.x86_64.rpm

python-deltarpm-3.5-0.5.20090913git.el6.x86_64.rpm

createrepo-0.9.9-18.el6.noarch.rpm

# cd/var/www/html/cdh/cm5.2.0/

We put

Into the bag

We go online to download a

Url:

http://pkgs.org/centos-6/centos-i386/createrepo-0.9.9-22.el6.noarch.rpm/download/

# Createrepo.

When installing Createrepo here is unsuccessful, we put the front in Yum.repo. Delete something to restore

Use

yum-y Installcreaterepo Installation Test

Failed

And then we're on the DVD. It says three copies of the installed files to the virtual machine.

Install deltarpm-3.5-0.5.20090913git.el6.x86_64.rpm First

Error:

Download the appropriate rpm

http://pkgs.org/centos-7/centos-x86_64/zlib-1.2.7-13.el7.i686.rpm/download/

Http://pkgs.org/centos-7/centos-x86_64/glibc-2.17-78.el7.i686.rpm.html

Download, this is going to match the system.

We try to find the appropriate RPM file on the disc.

Then install python-deltarpm-3.5-0.5.20090913git.el6.x86_64.rpm

Final installation createrepo-0.9.9-18.el6.noarch.rpm

Create local Yum

The Repodata directory is generated under the/var/www/html/cdh/cm5.2.0/directory after executing the command.

Manually install the Createrepo command via the RPM command to create the Yum warehouse Rpm-ivh Createrepo

10.3 Restarting Apache

# service Httpdrestart

Open the browser separately to see if it can be accessed correctly

/HTTP Host ip/cdh/

"Hadoop" 4, Hadoop installation Cloudera Manager (2)