hdp_requirements.sh

#!/bin/sh -

if [ "$(id -ru)" != 0 ]; then
    printf >&2 'Error: this installer needs the ability to run commands as root.\n'
    printf >&2 'Install as root or with sudo\n'
    exit 1
fi

my_disable_thp() {
    ( cat > /usr/local/sbin/ambari-thp-disable.sh <<-'EOF'
#!/usr/bin/env bash
# disable transparent huge pages: for Hadoop
thp_disable=true
if [ "${thp_disable}" = true ]; then
    for path in redhat_transparent_hugepage transparent_hugepage; do
        for file in enabled defrag; do
            if test -f /sys/kernel/mm/${path}/${file}; then
                echo never > /sys/kernel/mm/${path}/${file}
            fi
        done
    done
fi
exit 0
EOF
    )
    chmod +x /usr/local/sbin/ambari-thp-disable.sh
    sh /usr/local/sbin/ambari-thp-disable.sh
    printf '\nsh /usr/local/sbin/ambari-thp-disable.sh || /bin/true\n\n' >> /etc/rc.local
}


my_disable_ipv6() {
    mkdir -p /etc/sysctl.d
    ( cat > /etc/sysctl.d/99-hadoop-ipv6.conf <<-'EOF'
## Disabled ipv6
## Provided by Ambari Bootstrap
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
net.ipv6.conf.lo.disable_ipv6 = 1
EOF
    )
    sysctl -e -p /etc/sysctl.d/99-hadoop-ipv6.conf
}


yum install -y -q curl ntp ntpdate openssl python zlib wget unzip openssh-clients

printf "## Info: Disabling ipv6\n"
my_disable_ipv6

printf "## Info: Disabling thp\n"
my_disable_thp

printf "## Info: Disabling iptables\n"
chkconfig iptables off || true
service iptables stop || true
chkconfig ip6tables off || true
service ip6tables stop || true
                                
printf "## Info: Syncing time via ntpd\n"
ntpd -qg || true
chkconfig ntpd on || true
service ntpd restart || true
            
printf "## Info: disabling selinux\n"
setenforce 0 || true
sed -i 's/\(^[^#]*\)SELINUX=enforcing/\1SELINUX=disabled/' /etc/selinux/config
sed -i 's/\(^[^#]*\)SELINUX=permissive/\1SELINUX=disabled/' /etc/selinux/config

printf "## Info: setting ulimits\n"
printf '* - nofile 32768\n* - nproc 65536\n' >> /etc/security/limits.conf

sed -i 's/1024/65536/' /etc/security/limits.d/90-nproc.conf