https://www.xiongan.host/index.php/tag/centos/ https://www.xiongan.host/index.php/archives/37/ 2022-10-04T15:57:00+08:00 案例要求：一台web服务器宕机后，被keepalived检测到，切换到从服务器第二台备用，使服务正常运行，之后进行排错进行整改第一台机器准备：另外在准备好一台可以访问网页的机器便于测试1. Server端、client端都需要安装keepalived httpd服务yum install -y httpd keepalived2. Server端：mv /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bakvim /etc/keepalived/keepalived.conf! Configuration File for keepalivedglobal_defs {notification_email {root@localhost}notification_email_from Alexandre.Cassen@firewall.locsmtp_server 127.0.0.1smtp_connect_timeout 30router_id node3.tao.com}vrrp_instance websrv {state MASTER <==指定此节点为 Master 节点interface br0（修改成本机使用的网卡） <==指定监听的网卡virtual_router_id 51priority 100 <==指定优先级,数字越高约优先advert_int 1 <==心跳监测，单位为 sauthentication {auth_type PASS <==设定验证方式auth_pass 1111 <==设定密码为 1111}virtual_ipaddress {192.168.123.250 <==指定 VIP}}保存后 重启 keepalived服务之后在/var/www/html/中写一个测试页vi index.htmlserver.tao.com保存后 重启httpd服务3. Client端mv /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bakvim /etc/keepalived/keepalived.conf! Configuration File for keepalivedglobal_defs {notification_email {root@localhost}notification_email_from Alexandre.Cassen@firewall.locsmtp_server 127.0.0.1smtp_connect_timeout 30router_id node4.tao.com}vrrp_instance websrv {state MASTER <==指定此节点为 Master 节点interface br0（修改成本机使用的网卡） <==指定监听的网卡virtual_router_id 51priority 50 <==指定优先级,数字越高约优先advert_int 1 <==心跳监测，单位为 sauthentication {auth_type PASS <==设定验证方式auth_pass 1111 <==设定密码为 1111}virtual_ipaddress {192.168.123.250 <==指定 VIP}}保存后 重启 keepalived服务之后在/var/www/html/中写一个测试页Vi index.htmlServer.tao.com保存后 重启httpd服务4. 测试结果在server 和client端 keepalived都正常 显示的是server端页面Server端关闭keepalived模拟宕机 显示的就是client端 https://www.xiongan.host/index.php/archives/25/ 2022-09-28T19:54:00+08:00 案例要求：需要centos镜像下的httpd环境直接打包成新的镜像，直接使用准备：一台装有docker环境的虚拟机，拉取centos:7的镜像（最新的也可以）1.使用docker commit构建镜像拉取镜像创建环境[root@xiongan /]# yum clean all [root@xiongan /]# yum install -y httpd [root@xiongan /]# vi /var/www/html/index.html [root@xiongan /]# httpd -k start #使httpd服务立即生效【扩展】：此为httpd的配置文件中servername没有修改 95行 ServerName loaclhost:80[root@xiongan /]# curl http://172.17.0.2 hello,docker-xiongan以上环境就搭建完成#使用docker commit 构建新的镜像 [root@docker-tz ~]# docker commit xiongan centos-httpd:v12.使用docker build构建镜像-Dockerfile创建dockerfile目录在本机内创建dockerfile目录→创建Dockerfile文件 run-httpd.sh文件 index.html文件编辑脚本内容Dockerfile: FROM centos:7 MAINTAINER "tz taozi@taozi.com" RUN yum clean all RUN yum -y install httpd ADD run-httpd.sh /run-httpd.sh RUN chmod 755 /run-httpd.sh ADD index.html /var/www/html EXPOSE 80 WORKDIR / CMD ["/bin/bash","/run-httpd.sh"] run-httpd.sh: #! /bin/bash rm -rf /run/httpd* exec /sbin/httpd -D FOREGROUND测试执行[root@docker-tz dockerbuild]# docker build -t centos-test:v1 . #末尾有个. 不要丢掉 代表当前运行目录下的脚本文件