296 lines
10 KiB
Bash
296 lines
10 KiB
Bash
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#!/bin/bash
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# Redis哨兵集群部署与卸载脚本
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# 颜色配置
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GREEN="\033[32m"
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YELLOW="\033[33m"
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BLUE="\033[34m"
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RED="\033[31m"
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RESET="\033[0m"
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# 提示函数
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info() { echo -e "[ ${BLUE}INFO ${RESET}] $1"; }
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success() { echo -e "[ ${GREEN}SUCCESS ${RESET}] $1"; }
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warning() { echo -e "[ ${YELLOW}WARNING ${RESET}] $1"; }
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error() { echo -e "[ ${RED}ERROR ${RESET}] $1"; exit 1; }
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# 基础配置
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REDIS_PORT=6379
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SENTINEL_PORT=26379
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SENTINEL_NAME="mymaster"
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LOG_DIR="/var/log/redis"
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CONFIG_DIR="/etc/redis"
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SSH_OPTS="-T -o StrictHostKeyChecking=no -o LogLevel=ERROR"
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# 全局变量
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ACTION=""
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NODES=()
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NODE_COUNT=0
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MASTER=""
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SLAVES=()
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QUORUM=1
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PASSWORD=""
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# 参数解析（支持--install/--uninstall、--ip、--passwd参数）
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parse_args() {
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# 初始化参数变量
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local ip_provided=0
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local passwd_provided=0
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# 遍历解析参数
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while [[ $# -gt 0 ]]; do
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case "$1" in
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--install|--uninstall)
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ACTION="$1"
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shift
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;;
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--ip=*)
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IP_LIST="${1#*=}"
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ip_provided=1
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shift
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;;
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--passwd=*)
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PASSWORD="${1#*=}"
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passwd_provided=1
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shift
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;;
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*)
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error "无效参数: $1 （使用帮助：--install/--uninstall --ip=IP1,IP2,IP3... --passwd=redis密码）"
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;;
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esac
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done
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# 验证必要参数
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if [[ -z "$ACTION" ]]; then
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error "必须指定参数：--install/--uninstall --ip=IP1,IP2,IP3... --passwd=redis密码"
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fi
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if [[ $ip_provided -eq 0 ]]; then
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error "必须指定参数：--install/--uninstall --ip=IP1,IP2,IP3... --passwd=redis密码"
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fi
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if [[ $passwd_provided -eq 0 ]]; then
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error "必须指定参数：--install/--uninstall --ip=IP1,IP2,IP3... --passwd=redis密码"
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fi
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# 解析节点列表
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IFS=',' read -ra NODES <<< "$IP_LIST"
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NODE_COUNT=${#NODES[@]}
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if [[ $NODE_COUNT -lt 1 ]]; then
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error "IP列表不能为空，至少需要1个节点"
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fi
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# 配置主从节点和投票阈值
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MASTER="${NODES[0]}"
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SLAVES=("${NODES[@]:1}")
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QUORUM=$((NODE_COUNT / 2 + 1)) # 自动计算投票阈值
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}
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# 安装流程核心函数
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install() {
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echo -e "=========================================="
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echo -e "=== ${GREEN}Redis哨兵集群安装部署${RESET} ==="
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echo -e "=========================================="
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info "部署节点总数：$NODE_COUNT 个（${NODES[*]}）"
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info "主节点：$MASTER | 从节点：${SLAVES[*]}（共${#SLAVES[@]}个）"
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info "哨兵投票阈值（QUORUM）：$QUORUM（自动计算：$NODE_COUNT/2 +1）"
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info "Redis密码：******（已通过命令行传入）"
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info "预估总耗时：9-14 分钟（视节点数和网络）"
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echo -e "==========================================\n"
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# 步骤1：初始化环境
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info "步骤1/5：初始化所有节点环境 [${YELLOW}预估：5-9 分钟${RESET}]"
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info "正在安装依赖、配置日志目录和防火墙..."
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for node in "${NODES[@]}"; do
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ssh $SSH_OPTS $node "
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apt-get update -y >/dev/null 2>&1;
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apt-get install -y redis-server redis-sentinel net-tools >/dev/null 2>&1;
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mkdir -p $CONFIG_DIR $LOG_DIR;
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chown -R redis:redis $CONFIG_DIR $LOG_DIR;
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ufw disable >/dev/null 2>&1;
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iptables -F INPUT >/dev/null 2>&1;
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" >/dev/null 2>&1 || error "节点 $node 环境初始化失败"
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done
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success "步骤1完成：所有节点环境初始化完毕\n"
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# 步骤2：配置主节点
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info "步骤2/5：配置主节点 $MASTER [${YELLOW}预估：30秒${RESET}]"
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ssh $SSH_OPTS $MASTER "
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cat > $CONFIG_DIR/redis.conf <<EOF
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bind 0.0.0.0
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protected-mode no
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port $REDIS_PORT
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requirepass $PASSWORD
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masterauth $PASSWORD
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daemonize no
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logfile "$LOG_DIR/redis.log"
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dir /tmp
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replica-serve-stale-data yes
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replica-read-only yes
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EOF
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chown redis:redis $CONFIG_DIR/redis.conf;
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cat > /etc/systemd/system/redis.service <<EOF
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[Unit]
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Description=Redis Master Node
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After=network.target
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[Service]
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User=redis
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ExecStart=/usr/bin/redis-server $CONFIG_DIR/redis.conf
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ExecStop=/usr/bin/redis-cli -p $REDIS_PORT -a $PASSWORD shutdown
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Restart=always
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[Install]
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WantedBy=multi-user.target
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EOF
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systemctl daemon-reload;
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systemctl restart redis;
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systemctl enable redis;
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" >/dev/null 2>&1 || error "主节点 $MASTER 配置失败"
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success "步骤2完成：主节点配置完毕\n"
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# 步骤3：配置从节点
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info "步骤3/5：配置从节点 [${YELLOW}预估：${#SLAVES[@]}*30秒${RESET}]"
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info "从节点列表：${SLAVES[*]}"
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for slave in "${SLAVES[@]}"; do
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info "正在配置从节点：$slave"
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ssh $SSH_OPTS $slave "
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cat > $CONFIG_DIR/redis.conf <<EOF
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bind 0.0.0.0
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protected-mode no
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port $REDIS_PORT
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requirepass $PASSWORD
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masterauth $PASSWORD
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daemonize no
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logfile "$LOG_DIR/redis.log"
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dir /tmp
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replica-serve-stale-data yes
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replica-read-only yes
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replicaof $MASTER $REDIS_PORT
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EOF
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chown redis:redis $CONFIG_DIR/redis.conf;
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cat > /etc/systemd/system/redis.service <<EOF
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[Unit]
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Description=Redis Slave Node
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After=network.target
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[Service]
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User=redis
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ExecStart=/usr/bin/redis-server $CONFIG_DIR/redis.conf
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ExecStop=/usr/bin/redis-cli -p $REDIS_PORT -a $PASSWORD shutdown
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Restart=always
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[Install]
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WantedBy=multi-user.target
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EOF
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systemctl daemon-reload;
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systemctl restart redis;
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systemctl enable redis;
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" >/dev/null 2>&1 || error "从节点 $slave 配置失败"
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done
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success "步骤3完成：所有从节点配置完毕\n"
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# 步骤4：配置哨兵集群
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info "步骤4/5：配置哨兵集群 [${YELLOW}预估：$NODE_COUNT*30秒${RESET}]"
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info "哨兵投票阈值：$QUORUM（需$QUORUM个哨兵确认主节点下线才触发转移）"
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for node in "${NODES[@]}"; do
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info "正在配置哨兵节点：$node"
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ssh $SSH_OPTS $node "
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cat > $CONFIG_DIR/sentinel.conf <<EOF
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port $SENTINEL_PORT
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daemonize no
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logfile "$LOG_DIR/sentinel.log"
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sentinel monitor $SENTINEL_NAME $MASTER $REDIS_PORT $QUORUM
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sentinel down-after-milliseconds $SENTINEL_NAME 5000
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sentinel auth-pass $SENTINEL_NAME $PASSWORD
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sentinel config-epoch $SENTINEL_NAME 0
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EOF
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chown redis:redis $CONFIG_DIR/sentinel.conf;
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cat > /etc/systemd/system/redis-sentinel.service <<EOF
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[Unit]
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Description=Redis Sentinel
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After=network.target
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[Service]
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User=redis
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ExecStart=/usr/bin/redis-sentinel $CONFIG_DIR/sentinel.conf
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ExecStop=/usr/bin/redis-cli -p $SENTINEL_PORT shutdown
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Restart=always
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[Install]
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WantedBy=multi-user.target
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EOF
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systemctl daemon-reload;
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systemctl restart redis-sentinel;
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systemctl enable redis-sentinel;
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" >/dev/null 2>&1 || error "哨兵节点 $node 配置失败"
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done
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success "步骤4完成：哨兵集群配置完毕\n"
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# 步骤5：验证集群
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info "步骤5/5：验证集群状态 [${YELLOW}预估：1分钟${RESET}]"
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info "验证主节点 $MASTER..."
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master_info=$(ssh $SSH_OPTS $MASTER "redis-cli -p $REDIS_PORT -a $PASSWORD info replication | grep -E 'role:|connected_slaves'" 2>/dev/null)
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echo " $master_info"
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for slave in "${SLAVES[@]}"; do
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info "验证从节点 $slave..."
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slave_info=$(ssh $SSH_OPTS $slave "redis-cli -p $REDIS_PORT -a $PASSWORD info replication | grep -E 'role:|master_host|master_link_status'" 2>/dev/null)
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echo " $slave_info"
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done
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info "验证哨兵集群..."
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sentinel_info=$(ssh $SSH_OPTS $MASTER "redis-cli -p $SENTINEL_PORT info sentinel | grep 'master0:'" 2>/dev/null)
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echo " $sentinel_info"
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success "步骤5完成：集群验证完毕\n"
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# 部署总结
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echo -e "=========================================="
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echo -e "=== ${GREEN}部署成功！${RESET} ==="
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echo -e "☆ 集群架构：$NODE_COUNT节点（1主${#SLAVES[@]}从$NODE_COUNT哨兵）"
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echo -e "☆ 核心配置：Redis端口$REDIS_PORT | 哨兵端口$SENTINEL_PORT | 投票阈值$QUORUM"
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echo -e "☆ 功能状态：主从同步正常 | 哨兵监控正常 | 故障转移就绪"
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echo -e "=========================================="
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}
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# 卸载流程核心函数
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uninstall() {
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echo -e "=========================================="
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echo -e "=== ${RED}Redis哨兵集群彻底卸载${RESET} ==="
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echo -e "=========================================="
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info "卸载节点列表：${NODES[*]}（共$NODE_COUNT个节点）"
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info "Redis密码：******（已通过命令行传入）"
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info "预估耗时：3-6 分钟（清理所有资源）"
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echo -e "==========================================\n"
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# 逐节点卸载
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for i in "${!NODES[@]}"; do
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node="${NODES[$i]}"
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idx=$((i + 1))
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info "正在卸载节点（$idx/$NODE_COUNT）：$node"
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ssh $SSH_OPTS $node "
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# 停止服务（使用传入的密码）
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systemctl stop redis-sentinel >/dev/null 2>&1;
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redis-cli -p $REDIS_PORT -a '$PASSWORD' shutdown >/dev/null 2>&1;
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# 禁用服务
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systemctl disable redis redis-sentinel >/dev/null 2>&1;
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# 清理文件
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rm -rf $CONFIG_DIR $LOG_DIR /etc/systemd/system/redis* >/dev/null 2>&1;
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# 卸载依赖
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apt-get remove -y redis-server redis-sentinel >/dev/null 2>&1;
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apt-get autoremove -y >/dev/null 2>&1;
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" >/dev/null 2>&1 || error "节点 $node 卸载失败"
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success "节点 $node 卸载完成"
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done
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# 卸载总结
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echo -e "\n=========================================="
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echo -e "=== ${GREEN}卸载成功！${RESET} ==="
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echo -e "✓ 已彻底清理所有Redis相关资源："
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echo -e " - 服务：redis-server、redis-sentinel（停止+禁用）"
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echo -e " - 文件：配置目录、日志目录、systemd服务文件"
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echo -e " - 依赖：redis相关安装包及依赖组件"
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echo -e "=========================================="
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}
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# 执行入口
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parse_args "$@"
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if [ "$ACTION" = "--install" ]; then
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install
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elif [ "$ACTION" = "--uninstall" ]; then
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uninstall
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fi
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