新增和修改文档

Docs/Linux查看内核日志.md

@@ -8,6 +8,8 @@
   journalctl -xe --no-pager
   ```
 
+  `-f` 持续查看日志
+
 - 显示内核环缓冲区的内容
 
   ```bash

Docs/Linux查看进程.md

@@ -0,0 +1,17 @@
+> 本位作者：丁辉
+
+# Linux查看进程
+
+- 查看资源占用前 10 的进程
+
+  ```bash
+  ps aux --sort=-%mem | awk 'NR==1; NR>1 {print $0 | "head -11"}'
+  ```
+
+  或者更简洁的
+
+  ```bash
+  ps aux --sort=-%mem | head -11
+  ```
+
+  

资源安装/Keepalived部署.md

@@ -10,148 +10,211 @@
 | 从网关二 | 192.168.1.12 |              |
 |          |              | 192.168.1.10 |
 
-## 安装 keepalived
+## 开始部署
 
-```bash
+1. 安装 keepalived
-yum install -y keepalived
-```
 
-## 主节点
+   ```bash
+   yum install -y keepalived
+   ```
 
-**编辑配置文件**
+2. **主节点** 和 **从节点** 备份 Keepalived 配置文件
 
-```bash
+   ```bash
-mv /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
+   mv /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
-vi /etc/keepalived/keepalived.conf
+   ```
-```
 
-内容如下
+3. **主节点** 编辑配置文件
 
-```bash
+   ```bash
-! Configuration File for keepalived
+   vi /etc/keepalived/keepalived.conf
-  
+   ```
-global_defs {
-   router_id LVS_DEVEL # 负载均衡标识, 在局域网内应该是唯一的
-}
 
-#vrrp_script check_health {
+   内容如下
-  # 检测脚本
-  #script "/etc/keepalived/check_health_status.sh"
-  # 执行间隔时间
-  #interval 5
-#}
 
-vrrp_instance VI_1 {
+   ```bash
-    # 备用状态(当 MASTER 宕机之后根据优先级提升 BACKUP 为 MASTER )
+   ! Configuration File for keepalived
-    state BACKUP
+     
-    # 网卡设备名
+   global_defs {
-    interface eth0
+       router_id LVS_DEVEL           # 路由器标识，区分不同keepalived实例
-    # 标识虚拟路由器的ID(在局域网内应该是唯一的, 0-255)
+       script_user root              # 执行脚本的用户
-    virtual_router_id 50
+       enable_script_security        # 启用脚本安全限制
-    # 优先级
+   }
-    priority 100
+   
-    # MASTER与BACKUP同步检查的时间间隔
+   vrrp_script chk_haproxy {         # 定义健康检查脚本
-    advert_int 1
+       script "/usr/bin/killall -0 haproxy"  # 检查haproxy进程是否存在
-    # 非抢占模式
+       interval 2                    # 检查间隔(秒)
-    nopreempt
+       weight -20                    # 检查失败时优先级减20
-    # 本机IP地址
+       fall 2                        # 连续2次失败认为节点故障
-    unicast_src_ip 192.168.1.11
+       rise 2                        # 连续2次成功认为节点恢复
-    # 对端IP地址
+   }
-    unicast_peer { 
+   
-        192.168.1.12
+   # vrrp_script check_health {
-    }
+     # 检测脚本
-    authentication {
+     # script "/etc/keepalived/check_health_status.sh"
-        # 指定认证方式
+     # 执行间隔时间
-        auth_type PASS
+     # interval 5
-        # 指定认证所使用的密码
+   # }
-        auth_pass 1111
+   
-    }
+   vrrp_instance VI_1 { # VRRP实例定义
-    virtual_ipaddress {
+       # track_script { # 开启检测脚本
-        192.168.1.10/24 dev eth0
+           # check_health
-    }
+       # }
-    # 路由检测, 通过检测指定的网卡是否存在来判断服务是否正常
+       # 备用状态(当 MASTER 宕机之后根据优先级提升 BACKUP 为 MASTER)
-    track_interface {
+       state BACKUP
-        eth0
+       # 网卡设备名
-    }
+       interface eth0
-    # 开启检测脚本
+       # 虚拟路由器ID(1-255)，集群内唯一
-    #track_script {
+       virtual_router_id 50
-      #check_health
+       # 优先级(1-254)，越高越优先
-    #}
+       priority 100
-}
+       # VRRP通告间隔(秒)
-```
+       advert_int 1
+       # 非抢占模式
+       nopreempt
+       # 本机源IP(单播模式)
+       unicast_src_ip 192.168.1.11
+       # 对端IP列表(单播模式)
+       unicast_peer { 
+           192.168.1.12
+       }
+       
+       authentication { # 认证配置
+           # 认证类型：PASS/AH
+           auth_type PASS
+            # 认证密码(8位以内)
+           auth_pass 1111
+       }
+       
+       virtual_ipaddress { # 虚拟IP配置
+           # 192.168.1.10/24 # VIP地址/掩码(单网卡模式)
+           192.168.1.10/24 dev eth0 # VIP地址/掩码(多网卡模式)
+       }
+       
+       track_interface { # 路由检测, 通过检测指定的网卡是否存在来判断服务是否正常
+           eth0
+       }
+       
+       notify_master "/etc/keepalived/notify.sh master"    # 成为 master 时执行
+       notify_backup "/etc/keepalived/notify.sh backup"    # 成为 backup 时执行  
+       notify_fault "/etc/keepalived/notify.sh fault"      # 故障时执行
+   }
+   ```
 
-## 从节点
+4. **从节点** 编辑配置文件
 
-**编辑配置文件**
+   ```bash
+   vi /etc/keepalived/keepalived.conf
+   ```
 
-```bash
+   内容如下
-mv /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
-vi /etc/keepalived/keepalived.conf
-```
 
-内容如下
+   ```bash
+   ! Configuration File for keepalived
+     
+   global_defs {
+       router_id LVS_DEVEL           # 路由器标识，区分不同keepalived实例
+       script_user root              # 执行脚本的用户
+       enable_script_security        # 启用脚本安全限制
+   }
+   
+   vrrp_script chk_haproxy {         # 定义健康检查脚本
+       script "/usr/bin/killall -0 haproxy"  # 检查haproxy进程是否存在
+       interval 2                    # 检查间隔(秒)
+       weight -20                    # 检查失败时优先级减20
+       fall 2                        # 连续2次失败认为节点故障
+       rise 2                        # 连续2次成功认为节点恢复
+   }
+   
+   # vrrp_script check_health {
+     # 检测脚本
+     # script "/etc/keepalived/check_health_status.sh"
+     # 执行间隔时间
+     # interval 5
+   # }
+   
+   vrrp_instance VI_1 { # VRRP实例定义
+       # track_script { # 开启检测脚本
+           # check_health
+       # }
+       # 备用状态(当 MASTER 宕机之后根据优先级提升 BACKUP 为 MASTER)
+       state BACKUP
+       # 网卡设备名
+       interface eth0
+       # 虚拟路由器ID(1-255)，集群内唯一
+       virtual_router_id 50
+       # 优先级(1-254)，越高越优先
+       priority 50
+       # VRRP通告间隔(秒)
+       advert_int 1
+       # 非抢占模式
+       nopreempt
+       # 本机源IP(单播模式)
+       unicast_src_ip 192.168.1.12
+       # 对端IP列表(单播模式)
+       unicast_peer { 
+           192.168.1.11
+       }
+       
+       authentication { # 认证配置
+           # 认证类型：PASS/AH
+           auth_type PASS
+            # 认证密码(8位以内)
+           auth_pass 1111
+       }
+       
+       virtual_ipaddress { # 虚拟IP配置
+           # 192.168.1.10/24 # VIP地址/掩码(单网卡模式)
+           192.168.1.10/24 dev eth0 # VIP地址/掩码(多网卡模式)
+       }
+       
+       track_interface { # 路由检测, 通过检测指定的网卡是否存在来判断服务是否正常
+           eth0
+       }
+       
+       notify_master "/etc/keepalived/notify.sh master"    # 成为 master 时执行
+       notify_backup "/etc/keepalived/notify.sh backup"    # 成为 backup 时执行  
+       notify_fault "/etc/keepalived/notify.sh fault"      # 故障时执行
+   }
+   ```
 
-```bash
+5. 配置通知脚本
-! Configuration File for keepalived
-  
-global_defs {
-   router_id LVS_DEVEL # 负载均衡标识, 在局域网内应该是唯一的
-}
 
-#vrrp_script check_health {
+   ```bash
-  # 检测脚本
+   cat > /etc/keepalived/notify.sh <<'EOF'
-  #script "/etc/keepalived/check_health_status.sh"
+   #!/bin/bash
-  # 执行间隔时间
+   TYPE=$1
-  #interval 5
+   NAME=$2
-#}
+   STATE=$3
+   
+   case $STATE in
+       "MASTER")
+           echo "$(date): 进入MASTER状态，虚拟IP已绑定" >> /var/log/keepalived.log
+           # 可以在这里重启负载均衡器或相关服务
+           ;;
+       "BACKUP")
+           echo "$(date): 进入BACKUP状态" >> /var/log/keepalived.log
+           ;;
+       "FAULT")
+           echo "$(date): 进入FAULT状态" >> /var/log/keepalived.log
+           ;;
+   esac
+   EOF
+   ```
 
-vrrp_instance VI_1 {
+6. 分配脚本权限
-    # 备用状态(当 MASTER 宕机之后根据优先级提升 BACKUP 为 MASTER )
-    state BACKUP
-    # 网卡设备名
-    interface eth0
-    # 标识虚拟路由器的ID(在局域网内应该是唯一的, 0-255)
-    virtual_router_id 50
-    # 优先级
-    priority 50
-    # MASTER与BACKUP同步检查的时间间隔
-    advert_int 1
-    # 非抢占模式
-    nopreempt
-    # 本机IP地址
-    unicast_src_ip 192.168.1.12
-    # 对端IP地址
-    unicast_peer { 
-        192.168.1.11
-    }
-    authentication {
-        # 指定认证方式
-        auth_type PASS
-        # 指定认证所使用的密码
-        auth_pass 1111
-    }
-    virtual_ipaddress {
-        192.168.1.10/24 dev eth0
-    }
 
-    # 路由检测, 通过检测指定的网卡是否存在来判断服务是否正常
+   ```bash
-    track_interface {
+   chmod +x /etc/keepalived/notify.sh
-        eth0
+   ```
-    }
-    # 开启检测脚本
-    #track_script {
-      #check_health
-    #}
-}
-```
 
-## 启动 keepalived
+7. 启动 keepalived
 
-```bash
+   ```bash
-systemctl start keepalived
+   systemctl start keepalived
-systemctl enable keepalived
+   systemctl enable keepalived
-systemctl status keepalived
+   systemctl status keepalived
-```
+   ```
 
 ## 配置健康检测