zookeeper集群安装脚本(3节点)

解释：

ZK_VERSION=3.8.4
#ZK_VERSION=3.8.0
#ZK_VERSION=3.6.3
#ZK_VERSION=3.7.1
#ZK_URL=https://archive.apache.org/dist/zookeeper/zookeeper-${ZK_VERSION}/apache-zookeeper-${ZK_VERSION}-bin.tar.gz
#3.5.0及以下版本下载链接
ZK_URL=https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/zookeeper-${ZK_VERSION}/apache-zookeeper-${ZK_VERSION}-bin.tar.gz
#ZK_URL="https://mirrors.tuna.tsinghua.edu.cn/apache/zookeeper/stable/apache-zookeeper-${ZK_VERSION}-bin.tar.gz"
#ZK_URL=https://archive.apache.org/dist/zookeeper/zookeeper-${ZK_VERSION}/zookeeper-${ZK_VERSION}.bin.tar.gz

#ZK_VERSION=3.4.14
#3.5.0以下版本下载链接
#ZK_URL=https://archive.apache.org/dist/zookeeper/zookeeper-${ZK_VERSION}/zookeeper-${ZK_VERSION}.tar.gz


NODE1=172.16.0.180
NODE2=172.16.0.181
NODE3=172.16.0.182

.  /etc/os-release

HOST=`hostname -I|awk '{print $1}'`

color () {
    RES_COL=60
    MOVE_TO_COL="echo -en \\033[${RES_COL}G"
    SETCOLOR_SUCCESS="echo -en \\033[1;32m"
    SETCOLOR_FAILURE="echo -en \\033[1;31m"
    SETCOLOR_WARNING="echo -en \\033[1;33m"
    SETCOLOR_NORMAL="echo -en \E[0m"
    echo -n "$1" && $MOVE_TO_COL
    echo -n "["
    if [ $2 = "success" -o $2 = "0" ] ;then
        ${SETCOLOR_SUCCESS}
        echo -n $"  OK  "    
    elif [ $2 = "failure" -o $2 = "1"  ] ;then 
        ${SETCOLOR_FAILURE}
        echo -n $"FAILED"
    else
        ${SETCOLOR_WARNING}
        echo -n $"WARNING"
    fi
    ${SETCOLOR_NORMAL}
    echo -n "]"
    echo 
}

zk_myid () {
    read -p "请输入node编号(默认为 1): " MYID

    if [ -z "$MYID" ] ;then
        MYID=1
    elif [[ ! "$MYID" =~ ^[0-9]+$ ]];then
        color  "请输入正确的node编号!" 1
        exit
    else
        true
    fi
}


install_jdk() {
    if [ $ID = 'centos' -o  $ID = 'rocky' ];then
        yum -y install java-1.8.0-openjdk-devel || { color "安装JDK失败!" 1; exit 1; }
    else
        apt update
        apt install openjdk-11-jdk -y || { color "安装JDK失败!" 1; exit 1; } 
        #apt install openjdk-8-jdk -y || { color "安装JDK失败!" 1; exit 1; } 
    fi
    java -version
}

install_zookeeper() {
    if [ -f apache-zookeeper-${ZK_VERSION}-bin.tar.gz ] ;then
        cp apache-zookeeper-${ZK_VERSION}-bin.tar.gz /usr/local/src/
    else
        wget -P /usr/local/src/ --no-check-certificate $ZK_URL || { color  "下载失败!" 1 ;exit ; }
    fi
    tar xf /usr/local/src/${ZK_URL##*/} -C /usr/local
    ln -s /usr/local/apache-zookeeper-*-bin/ /usr/local/zookeeper
    echo 'PATH=/usr/local/zookeeper/bin:$PATH' >  /etc/profile.d/zookeeper.sh
    .  /etc/profile.d/zookeeper.sh
    
    mkdir -p /usr/local/zookeeper/data 
    echo $MYID > /usr/local/zookeeper/data/myid
    cat > /usr/local/zookeeper/conf/zoo.cfg <<EOF
tickTime=2000
initLimit=10
syncLimit=5
dataDir=/usr/local/zookeeper/data
clientPort=2181
maxClientCnxns=128
autopurge.snapRetainCount=3
autopurge.purgeInterval=24
server.1=${NODE1}:2888:3888
server.2=${NODE2}:2888:3888
server.3=${NODE3}:2888:3888
EOF
	cat > /lib/systemd/system/zookeeper.service <<EOF
[Unit]
Description=zookeeper.service
After=network.target

[Service]
Type=forking
#Environment=/usr/local/zookeeper
ExecStart=/usr/local/zookeeper/bin/zkServer.sh start
ExecStop=/usr/local/zookeeper/bin/zkServer.sh stop
ExecReload=/usr/local/zookeeper/bin/zkServer.sh restart

[Install]
WantedBy=multi-user.target
EOF
    systemctl daemon-reload
    systemctl enable --now  zookeeper.service
    systemctl is-active zookeeper.service
	if [ $? -eq 0 ] ;then 
        color "zookeeper 安装成功!" 0  
    else 
        color "zookeeper 安装失败!" 1
        exit 1
    fi   
}

zk_myid

install_jdk

install_zookeeper