高可用集群keepalived

1.3 环境部署脚本

#!/bin/bash
# 定义日志文件路径
LOG_FILE="/var/log/keepalived_install.log"# 定义环境变量
KEEPALIVED_VERSION="2.3.2"
KEEPALIVED_INSTALL_PATH="/data/server/keepalived"
KEEPALIVED_TAR_NAME="keepalived-${KEEPALIVED_VERSION}"# 读取节点角色
read -p "当前节点的角色(MASTER|BACKUP): " KEEPALIVED_ROLE# 定义日志记录函数
function log() {local timestamp=$(date "+%Y-%m-%d %H:%M:%S")local message="$1"echo "[${timestamp}] ${message}" | tee -a ${LOG_FILE}
}# 定义函数：基本环境定制
function setup_environment() {log "开始基本环境定制"echo "正在更新软件包列表..."apt update 2>&1 | tee -a ${LOG_FILE}if [ $? -eq 0 ]; thenlog "软件包列表更新成功"elselog "软件包列表更新失败"exit 1fiecho "正在安装必要的软件包..."apt -y install make gcc ipvsadm build-essential pkg-config automake autoconf \libipset-dev libnl-3-dev libnl-genl-3-dev libssl-dev libxtables-dev libip4tc-dev \libip6tc-dev libmagic-dev libsnmp-dev libglib2.0-dev libpcre2-dev libnftnl-dev \libmnl-dev libsystemd-dev libpopt-dev daemon 2>&1 | tee -a ${LOG_FILE}if [ $? -eq 0 ]; thenlog "必要软件包安装成功"elselog "必要软件包安装失败"exit 1fi
}# 定义函数：下载软件
function download_software() {log "开始下载软件"echo "正在创建目录并下载 Keepalived ${KEEPALIVED_VERSION}..."mkdir -p /data/{server,softs} 2>&1 | tee -a ${LOG_FILE}if [ $? -eq 0 ]; thenlog "目录创建成功"elselog "目录创建失败"exit 1ficd /data/softsif [ ! -f ${KEEPALIVED_TAR_NAME}.tar.gz ]; thenlocal keepalived_url="https://keepalived.org/software/${KEEPALIVED_TAR_NAME}.tar.gz"wget "${keepalived_url}" 2>&1 | tee -a ${LOG_FILE}if [ $? -eq 0 ]; thenlog "Keepalived ${KEEPALIVED_VERSION} 下载成功"elselog "Keepalived ${KEEPALIVED_VERSION} 下载失败"exit 1fifiecho "正在解压 Keepalived ${KEEPALIVED_VERSION}..."local untar_dir="/data/softs/${KEEPALIVED_TAR_NAME}"[ -d ${untar_dir} ] && rm -rf ${untar_dir}tar xvf "${KEEPALIVED_TAR_NAME}.tar.gz" 2>&1 | tee -a ${LOG_FILE}if [ $? -eq 0 ]; thenlog "Keepalived ${KEEPALIVED_VERSION} 解压成功"elselog "Keepalived ${KEEPALIVED_VERSION} 解压失败"exit 1fi
}# 定义函数：编译安装
function compile_and_install() {log "开始编译安装"echo "正在进入解压目录并进行配置..."cd "${KEEPALIVED_TAR_NAME}"./configure --prefix="${KEEPALIVED_INSTALL_PATH}" 2>&1 | tee -a ${LOG_FILE}if [ $? -eq 0 ]; thenlog "配置成功，安装路径为 ${KEEPALIVED_INSTALL_PATH}"elselog "配置失败，安装路径为 ${KEEPALIVED_INSTALL_PATH}"exit 1fiecho "正在编译 Keepalived ${KEEPALIVED_VERSION}..."make 2>&1 | tee -a ${LOG_FILE}if [ $? -eq 0 ]; thenlog "编译成功"elselog "编译失败"exit 1fiecho "正在安装 Keepalived ${KEEPALIVED_VERSION} 到 ${KEEPALIVED_INSTALL_PATH}..."make install 2>&1 | tee -a ${LOG_FILE}if [ $? -eq 0 ]; thenlog "安装成功，安装路径为 ${KEEPALIVED_INSTALL_PATH}"elselog "安装失败，安装路径为 ${KEEPALIVED_INSTALL_PATH}"exit 1fi
}# 定义函数：定制服务文件
function customize_service_file() {log "开始定制服务文件"echo "正在复制服务文件..."cd /data/softs/${KEEPALIVED_TAR_NAME}/keepalivedcp keepalived.service /lib/systemd/system/ 2>&1 | tee -a ${LOG_FILE}if [ $? -eq 0 ]; thenlog "服务文件复制成功"elselog "服务文件复制失败"exit 1fi
}# 定义函数：定制配置文件
function customize_config_file() {log "开始定制配置文件"echo "正在定制配置文件..."cd "${KEEPALIVED_INSTALL_PATH}/etc/keepalived/"[ ! -d /etc/keepalived ] && mkdir /etc/keepalived || rm -rf /etc/keepalived/*mv keepalived.conf.sample /etc/keepalived/keepalived.conf 2>&1 | tee -a ${LOG_FILE}local net_name=$(ip a | awk -F " |:" '/MULTICAST/{print $3}'|head -n1)sed -i "s/eth0/${net_name}/g" /etc/keepalived/keepalived.confsed -i '/virtual_server/,$d' /etc/keepalived/keepalived.confif [ "${KEEPALIVED_ROLE}" == "BACKUP" ]; thensed -i 's/MASTER/BACKUP/' /etc/keepalived/keepalived.confsed -i 's/ty 100/ty 90/' /etc/keepalived/keepalived.conf  # 注意：这里可能存在拼写错误（ty应为priority）fiif [ $? -eq 0 ]; thenlog "配置文件定制成功，安装路径为 ${KEEPALIVED_INSTALL_PATH}"elselog "配置文件定制失败，安装路径为 ${KEEPALIVED_INSTALL_PATH}"exit 1fi
}# 定义函数：启动服务
function start_service() {log "开始启动服务"echo "正在重新加载 systemd 管理器配置..."systemctl daemon-reload 2>&1 | tee -a ${LOG_FILE}if [ $? -eq 0 ]; thenlog "systemd 管理器配置重新加载成功"systemctl start keepalivedelselog "systemd 管理器配置重新加载失败"exit 1fi
}# 主函数，按顺序调用各个子函数
function main() {# 检查环境变量是否为空if [ -z "${KEEPALIVED_VERSION}" ]; thenlog "错误：KEEPALIVED_VERSION 环境变量为空"exit 1fiif [ -z "${KEEPALIVED_INSTALL_PATH}" ]; thenlog "错误：KEEPALIVED_INSTALL_PATH 环境变量为空"exit 1fisetup_environmentdownload_softwarecompile_and_installcustomize_service_filecustomize_config_filestart_servicelog "Keepalived ${KEEPALIVED_VERSION} 安装及配置完成，安装路径为 ${KEEPALIVED_INSTALL_PATH}！"echo "Keepalived ${KEEPALIVED_VERSION} 安装及配置完成，安装路径为 ${KEEPALIVED_INSTALL_PATH}！"
}# 执行主函数
main

1.4 配置简介