linux编写脚本实现Nginx集群管理代码

在Linux环境下，使用脚本管理和配置Nginx集群通常涉及到监控、负载均衡以及健康检查等功能。以下是一个简单的shell脚本示例，用于基本的Nginx集群状态监控和启动停止操作：

#!/bin/bash

# 定义Nginx的安装路径和配置文件路径
NGINX_DIR="/usr/local/nginx"
NGINX_CONF="$NGINX_DIR/conf"

# 集群节点列表，这里假设是两个节点
NODES=("node1" "node2")

# 启动Nginx
start_nginx() {
  for node in "${NODES[@]}"; do
    echo "Starting Nginx on $node..."
    systemctl start nginx@$node || { echo "Failed to start on $node"; exit 1; }
  done
}

# 停止Nginx
stop_nginx() {
  for node in "${NODES[@]}"; do
    echo "Stopping Nginx on $node..."
    systemctl stop nginx@$node || { echo "Failed to stop on $node"; exit 1; }
  done
}

# 检查Nginx状态
check_nginx_status() {
  for node in "${NODES[@]}"; do
    if systemctl is-active nginx@$node | grep -q "active"; then
      echo "$node is running."
    else
      echo "$node is not running."
    fi
  done
}

case $1 in
  start)
    start_nginx
    ;;
  stop)
    stop_nginx
    ;;
  status)
    check_nginx_status
    ;;
  *)
    echo "Usage: $0 {start|stop|status}"
    exit 1
    ;;
esac

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