Install Nexus OSS for CentOS6

install-nexus-oss-centos6.sh

#!/usr/bin/env bash

NEXUS_DEPLOY_VERSION=2.12.0
NEXUS_PATCH_LEVEL=01

#
# JAVA OPENJDK
#

echo "nexus: install Java OpenJDK"
yum -y install java-1.8.0-openjdk

echo "nexus: displaying system Java version"
java -version

#
# DOWNLOAD NEXUS
#

if [ ! -h /app/nexus/nexus ]; then
    echo "nexus: installing Nexus"

    # Add nexus user
    if [ `grep -c "^nexus:" /etc/passwd` -eq 0 ]; then
        echo "nexus: creating nexus user"
        /usr/sbin/groupadd nexus
        /usr/sbin/useradd -g nexus -c "nexus Server" nexus
        chage -I -1 -m 7 -M -1 -E -1 nexus
        chown nexus:nexus /home/nexus
        chmod 0755 /home/nexus
        if [ ! `grep -q '^#includedir /etc/sudoers.d' /etc/sudoers` ]; then
            mkdir -p /etc/sudoers.d
            chmod 0750 /etc/sudoers.d
            echo '#includedir /etc/sudoers.d' >> /etc/sudoers
        fi
        if [ ! -f /etc/sudoers.d/nexus ]; then
            echo "nexus     ALL=(ALL) NOPASSWD:ALL" > /etc/sudoers.d/nexus
            chmod 0440 /etc/sudoers.d/nexus
        fi
    fi

    # Create nexus root
    if [ ! -d /app/nexus ]; then
        echo "nexus: creating directory /app/nexus"
        mkdir -p /app/nexus
        chown nexus:nexus /app/nexus
        chmod 700 /app/nexus
    fi

    # Create nexus log root
    if [ ! -d /var/log/nexus ]; then
        echo "nexus: creating directory /var/log/nexus"
        mkdir /var/log/nexus
        chown nexus:nexus /var/log/nexus
        chmod 700 /var/log/nexus
    fi

    # Install createrepo
    echo "nexus: installing createrepo"
    yum -y install createrepo

    # Install nexus
    echo "nexus: installing nexus"
    yum -y install wget
    cd /tmp
    wget -nv --no-check-certificate http://www.sonatype.org/downloads/nexus-${NEXUS_DEPLOY_VERSION}-${NEXUS_PATCH_LEVEL}-bundle.tar.gz
    mv nexus-${NEXUS_DEPLOY_VERSION}-${NEXUS_PATCH_LEVEL}-bundle.tar.gz /app/nexus
    cd /app/nexus
    tar xvzf nexus-${NEXUS_DEPLOY_VERSION}-${NEXUS_PATCH_LEVEL}-bundle.tar.gz
    rm -f nexus-${NEXUS_DEPLOY_VERSION}-${NEXUS_PATCH_LEVEL}-bundle.tar.gz
    chown -R nexus:nexus nexus-${NEXUS_DEPLOY_VERSION}-${NEXUS_PATCH_LEVEL} sonatype-work
    ln -f -s /app/nexus/nexus-${NEXUS_DEPLOY_VERSION}-${NEXUS_PATCH_LEVEL} nexus
    ln -f -s /app/nexus/nexus/bin/nexus /etc/init.d/nexus
    if [ `grep NEXUS_HOME /etc/profile | wc -l` -eq 0 ]; then
        echo export NEXUS_HOME=/app/nexus/nexus >> /etc/profile
    fi
    chmod 755 /etc/init.d/nexus
    sed -i 's:^NEXUS_HOME="..":NEXUS_HOME="/app/nexus/nexus":' /etc/init.d/nexus
    sed -i 's:^#RUN_AS_USER=:RUN_AS_USER=nexus:' /etc/init.d/nexus
    sed -i 's:^#PIDDIR=".":PIDDIR="/home/nexus":' /etc/init.d/nexus
    sed -i 's:^application-port=8081:application-port=8080:' /app/nexus/nexus/conf/nexus.properties
    cd /etc/init.d
    chkconfig --add nexus
    chkconfig --levels 345 nexus on

    # Add nexus alias to hosts
    if [ `grep 127.0.0.1 /etc/hosts | grep nexus | wc -l` -eq 0 ]; then
        echo "nexus: Adding nexus alias to /etc/hosts"
        sed -i '/^127.0.0.1 / s/$/ nexus/' /etc/hosts
    fi

    # Start nexus
    echo "nexus: starting Nexus"
    service nexus start

    # Verify nexus is running
    echo "nexus: verifying Nexus is running"
    sleep 2
    COUNTER=0
    grep -q 'JettyServer - Running' /app/nexus/nexus/logs/wrapper.log
    while [[ $? -ne 0 && $COUNTER -lt 60 ]]; do
        sleep 2
        let COUNTER+=2
        echo "nexus: waiting for Nexus to start... ($COUNTER seconds so far)"
        grep -q 'JettyServer - Running' /app/nexus/nexus/logs/wrapper.log
    done
    if [[ $(grep -q 'JettyServer - Running' /app/nexus/nexus/logs/wrapper.log) -eq 0 ]]; then
        echo "nexus: nexus is running"
    else
        echo "nexus: ERROR: nexus is NOT running.  Something went wrong."
        exit 1
    fi

    # Check main page is loading
    echo "nexus: verifying Nexus main page is loading"
    sleep 2
    COUNTER=0
    curl -sSL http://localhost:8080/nexus | grep -q "Nexus Repository Manager OSS"
    while [[ $? -ne 0 && $COUNTER -lt 60 ]]; do
        sleep 2
        let COUNTER+=2
        echo "nexus: waiting for Nexus main page to load... ($COUNTER seconds so far)"
        curl -sSL http://localhost:8080/nexus | grep -q "Nexus Repository Manager OSS"
    done
    if [[ $(curl -sSL http://localhost:8080/nexus | grep -q "Nexus Repository Manager OSS") -eq 0 ]]; then
        echo "nexus: nexus main page is loading"
    else
        echo "nexus: ERROR: nexus main page is NOT loading.  Something went wrong."
        exit 1
    fi

    echo "nexus: complete"
else
    echo "nexus: nexus repository already installed"
fi