install apache hadoop cluster cdh4 cloudera on digitalocean br br Hello Friends My Name is Mohit Talpara and To'day i am Showing You How To install apache hadoop cluster cdh4 cloudera digitalocean br br we choose digitalocean because his Provided Kvm Virtualization, Shared Private Networking, ECC Ram and RAID SSD storage and Tier-1 Bandwidth All servers come with 1Gbsec so its best configration for Clusters and is chepest then other provider so we always say to used digitalocean for Cluster Stability. br br Now First You Need To Creat Some Node in Digitalocean Control Panel and Setup DNS For Eatch one . br br in my Tutorial i am used 4 Droplets with 1GB Memory and 30GB Disk Space and setup host name for eatch one br br so now i have 4 Droplets with this host name br br node1.datatube.co.in 192.241.162.77 br node2.datatube.co.in 162.243.80.11 br node3.datatube.co.in 162.243.81.68 br node4.datatube.co.in 162.243.82.23 br br now Chabged Password Of All Node And Created New Same Password For All Users Because in cloudera Setup i will choose root password authentication option br br now Fisrt Login In To All Droplets Using SSH br br And Update Yum Using This Command br br yum -y install perl openssh-clients br br Now Edit Host File For Add All Cluster Nodes Please Note Its My Configration You Need To Add Your Own Host Domain Name. br br Edit Host File using This Command br nano etchosts br br And Add This Config in host file please note do not delete any existing host just add new host br br 192.241.162.77 node1.datatube.co.in n1 br 162.243.80.11 node2.datatube.co.in n2 br 162.243.81.68 node3.datatube.co.in n3 br 162.243.82.23 node4.datatube.co.in n4 br br Now Edit etcresolv.conf File Using This Command.[It is use to configure client side access to the Internet Domain Name System (DNS). This file defines which name servers to use.] br br nano etcresolv.conf br br Now Delete All Data in file and Add This Data br br search datatube.co.in br nameserver 8.8.8.8 br br Now Edit Network using This Commands br br nano etcsysconfignetwork br br Delete All Config and Add this Following Config [Please Not in this config HOSTNAME= is Your server(drop) Host Name So change with your Server Host Name] br br NETWORKING=yes br HOSTNAME=node1.datatube.co.in br GATEWAY=8.8.8.8 br br Now Edit selinux Configration using This Command br nano etcselinuxconfig br br And See In This File this option SELINUX is disabled br SELINUX=disabled br br Now Check Your Iptables off br br chkconfig iptables off br br Now Edit Yum Config Disable For fastestmirror checking.So edit fastestmirror.conf file using this Commandline br br nano etcyumpluginconf.dfastestmirror.conf br br edit in config file enabled=1 to enabled=0 br br enabled=0 br br And After Restart The Network using This Command br br etcinit.dnetwork restart br br now edit ssh config file For Stop To Check Hostkey using This Command br nano etcsshsshconfig br br edit in Config File StricHostkeyChecking no br br StricHostkeyChecking no br br now All Node Is Ready For Install Cloudera manager So just install in only main node using This Command br br wget ...