THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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If passwordless ssh has not yet been set up within the cluster, then in main node generate key and add it to trusted:
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cat /dev/zero | ssh-keygen -q -N "" 2>/dev/null
ssh-copy-id -i ~/.ssh/id_rsa.pub <replace_with_master_node_ip>
chmod 700 ~/.ssh |
Add this key to all the slave nodes:
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Inspired by: http://docs.hortonworks.com/HDPDocuments/Ambari-2.4.1.0/bk_ambari-installation/content/ch_Getting_Ready.html
On all nodes disable security:
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Adjust limits to secure level (inspired by link):
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ulimit -n |
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32768 ulimit -u 65536 echo -e "* - nofile 32768\n* - nproc 65536" >> /etc/security/limits.conf |
Enable time sync, disable firewall and SElinux:
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257597
chkconfig ntpd on
service ntpd start
chkconfig iptables off
/etc/init.d/iptables stop
setenforce 0 |
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