自适应网站建站价格,asp网站后台管理系统源码,工作细胞第一季全集免费,硬件开发工程师面试题目录 一.本文基于上一篇文章keepalived环境来做的#xff0c;主机信息如下 二.为两台虚拟机准备添加一块新硬盘设备 三.安装drbd9 1.使用扩展源的rpm包来下载 2.创建资源并挂载到新增的硬盘 3.主设备升级身份 4.主备两个设备手动切换身份演示 四.安装配置nfs 五.安装…目录 一.本文基于上一篇文章keepalived环境来做的主机信息如下 二.为两台虚拟机准备添加一块新硬盘设备 三.安装drbd9 1.使用扩展源的rpm包来下载 2.创建资源并挂载到新增的硬盘 3.主设备升级身份 4.主备两个设备手动切换身份演示 四.安装配置nfs 五.安装keeepalived 六.编辑keepalived.conf配置文件 1.主设备配置文件如下 2.备设备配置文件如下 3.脚本文件 七.测试 1.主设备nfs掉点查看keepalived调用探测脚本是否能够将nfs重新启动 2.主设备keepalived掉点查看VIP和挂载目录是否能够飘逸到备设备 一.本文基于上一篇文章keepalived环境来做的主机信息如下 主keepaliveddrbd192.168.2.130main 备keepaliveddrbd192.168.2.133serverc VIP192.168.2.100 二.为两台虚拟机准备添加一块新硬盘设备 关机状态下进行开机状态下新增后需要重启如果没有特殊名称要求直接都点下一步即可两台设备都做 [rootmain ~]# lsblk NAME           MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda               8:0   0   20G 0 disk ├─sda1           8:1   0   1G 0 part /boot └─sda2           8:2   0   19G 0 part ├─centos-root 253:0   0   17G 0 lvm /└─centos-swap 253:1   0   2G 0 lvm   sdb               8:16   0   20G 0 disk   #刚才新增的 sr0             11:0   1 4.4G 0 rom /cdrom 三.安装drbd9 1.使用扩展源的rpm包来下载 主备都做 [rootmain ~]# rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm yum install gcc gcc-c make glibc flex kernel* -y yum install -y drbd90-utils kmod-drbd90 modprobe drbd echo drbd /etc/modules-load.d/drbd.conf lsmod | grep drbd drbd                 654854 0 libcrc32c             12644 5 xfs,drbd,ip_vs,nf_nat,nf_conntrack [rootmain drbd.d]# systemctl start drbd   #启动drbd ​ [rootmain ~]# tree /etc/drbd.d #配置文件和资源存放路径如下 /etc/drbd.d ├── global_common.conf └── r0.res ​ 0 directories, 2 files [rootmain ~]# cat /etc/drbd.conf # You can find an example in /usr/share/doc/drbd.../drbd.conf.example ​ include drbd.d/global_common.conf; include drbd.d/*.res; 2.创建资源并挂载到新增的硬盘 [rootmain drbd.d]# cat r0.res #创建r0资源主备都做可以拷贝进行 resource r0 {disk /dev/sdb;device /dev/drbd0;meta-disk internal;on main {address 192.168.2.130:7789;}on serverc {address 192.168.2.133:7789;} } [rootmain drbd.d]# drbdadm create-md r0 initializing activity log initializing bitmap (640 KB) to all zero Writing meta data... New drbd meta data block successfully created. [rootmain drbd.d]# drbdadm up r0 3.主设备升级身份 刚安装完成两台设备应该都是secondary主备手动升级身份 初始化过程在9版本用watch drbdadm status 资源名称看 [rootmain drbd.d]# drbdadm primary r0 --force [rootmain drbd.d]# mkfs.xfs /dev/drbd0 #主做备不做 [rootmain drbd.d]# mkdir /data   [rootmain drbd.d]# mount /dev/drbd0 /data   [rootmain drbd.d]# drbdadm status r0   #查看状态只查看角色可以使用drbdadm role r0 r0 role:Primarydisk:UpToDateserverc role:Secondarypeer-disk:UpToDate [rootserverc ~]# drbdadm status r0   #备设备的状态 r0 role:Secondarydisk:UpToDatemain role:Primarypeer-disk:UpToDate[rootmain ~]# mkfs.xfs /dev/drbd0 meta-data/dev/drbd0             isize512   agcount4, agsize1310678 blks                       sectsz512   attr2, projid32bit1                       crc1       finobt0, sparse0 data                           bsize4096   blocks5242711, imaxpct25                       sunit0     swidth0 blks naming   version 2             bsize4096   ascii-ci0 ftype1 log     internal log           bsize4096   blocks2560, version2                       sectsz512   sunit0 blks, lazy-count1 realtime none                   extsz4096   blocks0, rtextents0 [rootmain ~]# mount /dev/drbd0 /data   #主设备查看挂载情况写入测试文件 [rootmain ~]# df -h | grep data /dev/drbd0               20G   33M   20G   1% /data [rootmain drbd.d]# ll /data total 0 [rootmain drbd.d]# echo hello /data/a.txt [rootmain drbd.d]# ll /data/ total 4 -rw-r--r-- 1 root root 6 Mar 29 21:53 a.txt [rootmain drbd.d]# cat /data/a.txt hello 4.主备两个设备手动切换身份演示 先在主备降级并卸载后到备设备升级挂载 [rootmain ~]# drbdadm role r0 Primary [rootmain ~]# umount /data [rootmain ~]# drbdadm secondary r0 [rootmain ~]# drbdadm role r0 Secondary ​ [rootserverc ~]# drbdadm role r0 Secondary [rootserverc ~]# drbdadm primary r0 [rootserverc ~]# mount /dev/drbd0 /data [rootserverc ~]# drbdadm role r0 Primary #在日志中是可以清除查看到这个身份转换过程的 #tail -f /var/log/messages Mar 30 13:38:53 main kernel: XFS (drbd0): Unmounting Filesystem Mar 30 13:39:05 main kernel: drbd r0: Preparing cluster-wide state change 1582556808 (1--1 3/2) Mar 30 13:39:05 main kernel: drbd r0: State change 1582556808: primary_nodes0, weak_nodes0 Mar 30 13:39:05 main kernel: drbd r0: Committing cluster-wide state change 1582556808 (1ms) Mar 30 13:39:05 main kernel: drbd r0: role( Primary - Secondary ) [secondary] Mar 30 13:39:35 main kernel: drbd r0 serverc: Preparing remote state change 1834794712 Mar 30 13:39:35 main kernel: drbd r0 serverc: Committing remote state change 1834794712 (primary_nodes1) Mar 30 13:39:35 main kernel: drbd r0 serverc: peer( Secondary - Primary ) [remote] 四.安装配置nfs 主备都做 [rootmain drbd.d]# yum install -y rpcbind nfs-utils [rootmain drbd.d]# vim /etc/exports [rootmain ~]# cat /etc/exports /data 192.168.2.0/24(rw,sync,no_root_squash) [rootserverc ~]# cat /etc/exports /data 192.168.2.0/24(rw,sync,no_root_squash) ​ systemctl start rpcbind nfs 五.安装keeepalived 参考上一篇文章部署 六.编辑keepalived.conf配置文件 1.主设备配置文件如下 [rootmain keepalived]# cat keepalived.conf ! Configuration File for keepalived ​ global_defs {notification_email {acassenfirewall.locfailoverfirewall.locsysadminfirewall.loc}notification_email_from Alexandre.Cassenfirewall.locsmtp_server 192.168.2.130smtp_connect_timeout 30router_id LVS_DEVEL1vrrp_skip_check_adv_addrvrrp_strictvrrp_garp_interval 0vrrp_gna_interval 0 } ​ vrrp_script chk_nfs {   #这个要写在引用部分前不然引用不上这个脚本在这还是耽误了挺长时间还有后面track_script及后面三个部分的顺序好像也是有影响可以自己具体实验一下script /etc/keepalived/chk_nfs.shinterval 2 #每隔多少秒检测weight -40   } ​ vrrp_instance VI_1 {state MASTER   #主interface ens33virtual_router_id 51mcast_src_ip 192.168.2.130priority 100advert_int 1nopreempt   #非抢占模式优先级生效authentication {auth_type PASSauth_pass 123456}track_script {   #引入验证块chk_nfs}notify_master /etc/keepalived/notify_master.sh   #以下是几个日志脚本稍后写notify_backup /etc/keepalived/notify_backup.shnotify_fault /etc/keepalived/notify_fault.shvirtual_ipaddress {   #VIP192.168.2.100} } 2.备设备配置文件如下 [rootserverc keepalived]# cat keepalived.conf ! Configuration File for keepalived ​ global_defs {notification_email {acassenfirewall.locfailoverfirewall.locsysadminfirewall.loc}notification_email_from Alexandre.Cassenfirewall.locsmtp_server 192.168.200.1smtp_connect_timeout 30router_id LVS_DEVEL2vrrp_skip_check_adv_addrvrrp_strictvrrp_garp_interval 0vrrp_gna_interval 0 } vrrp_script chk_nfs { script /etc/keepalived/chk_nfs.shinterval 2weught 40 } ​ vrrp_instance VI_1 {state BACKUP   #从interface ens33virtual_router_id 51priority 80   #优先级低于主advert_int 1nopreemptauthentication {auth_type PASSauth_pass 123456}track_script {chk_nfs}notify_master /etc/keepalived/notify_master.shnotify_backup /etc/keepalived/notify_backup.shnotify_fault /etc/keepalived/notify_fault.shvirtual_ipaddress {192.168.2.100} } 3.脚本文件 主备都做 [rootmain keepalived]# cat chk_nfs.sh #nfs检测脚本 #!/bin/bash /usr/bin/systemctl status nfs if [ $? -ne 0 ] #校测到没有启动就尝试启动nfs thensystemctl start nfsif [ $? -ne 0 ]then #如果仍然启动不了就卸载降级停止keealived服务umount -v /dev/drbd0drbdadm secondary r0systemctl stop keepalivedfi fi[rootmain keepalived]# cat notify_master.sh #!/bin/bash timedate %F %H:%M:%S #日志时间格式 log/etc/keepalived/logs echo -e $time ------notify_master------\n $log/notify_master.log drbdadm primary r0 $log/notify_master.log #当为主设备时先升级挂载重启nfs mount -v /dev/drbd0 /data $log/notify_master.log systemctl restart nfs $log/notify_master.log echo -e \n $log/notify_master.log[rootmain keepalived]# cat notify_backup.sh #!/bin/bash timedate %F %H:%M:%S log/etc/keepalived/logs echo -e $time ------notify_backup------\n $log/notify_backup.log systemctl stop nfs $log/notify_backup.log #当为备设备时先停止nfs卸载降级 umount -v /dev/drbd0 $log/notify_backup.log drbdadm secondary r0 $log/notify_backup.log echo -e \n $log/notify_backup.log[rootmain keepalived]# cat notify_fault.sh #!/bin/bash timedate %F %H:%M:%S echo -e $time ------notify_fault------\n /etc/keepalived/logs/notify_fault.log systemctl stop nfs /etc/keepalived/logs/notify_fault.log umount -v /dev/drbd0 /etc/keepalived/logs/notify_fault.log drbdadm secondary r0 /etc/keepalived/logs/notify_fault.log echo -e \n /etc/keepalived/logs/notify_fault.logchmod x *.sh 七.测试 1.主设备nfs掉点查看keepalived调用探测脚本是否能够将nfs重新启动 [rootmain keepalived]# systemctl stop nfs [rootmain keepalived]# systemctl status nfs ● nfs-server.service - NFS server and servicesLoaded: loaded (/usr/lib/systemd/system/nfs-server.service; disabled; vendor preset: disabled)Drop-In: /run/systemd/generator/nfs-server.service.d└─order-with-mounts.confActive: active (exited) since Sat 2024-03-30 14:15:02 CST; 5s agoProcess: 82157 ExecStopPost/usr/sbin/exportfs -f (codeexited, status0/SUCCESS)Process: 82153 ExecStopPost/usr/sbin/exportfs -au (codeexited, status0/SUCCESS)Process: 82151 ExecStop/usr/sbin/rpc.nfsd 0 (codeexited, status0/SUCCESS)Process: 82283 ExecStartPost/bin/sh -c if systemctl -q is-active gssproxy; then systemctl reload gssproxy ; fi (codeexited, status0/SUCCESS)Process: 82266 ExecStart/usr/sbin/rpc.nfsd $RPCNFSDARGS (codeexited, status0/SUCCESS)Process: 82264 ExecStartPre/usr/sbin/exportfs -r (codeexited, status0/SUCCESS)Main PID: 82266 (codeexited, status0/SUCCESS)Tasks: 0Memory: 0BCGroup: /system.slice/nfs-server.serviceMar 30 14:15:02 main systemd[1]: Starting NFS server and services... Mar 30 14:15:02 main systemd[1]: Started NFS server and services. [rootmain keepalived]# df -h |grep data /dev/drbd0 20G 33M 20G 1% /data#具体日志文件如下 Mar 30 14:15:00 main systemd: Stopping NFS server and services... Mar 30 14:15:00 main systemd: Stopped NFS server and services. Mar 30 14:15:00 main systemd: Stopping NFSv4 ID-name mapping service... Mar 30 14:15:00 main systemd: Stopping NFS Mount Daemon... Mar 30 14:15:00 main rpc.mountd[65956]: Caught signal 15, un-registering and exiting. Mar 30 14:15:00 main systemd: Stopped NFSv4 ID-name mapping service. Mar 30 14:15:00 main kernel: nfsd: last server has exited, flushing export cache Mar 30 14:15:00 main systemd: Stopped NFS Mount Daemon. Mar 30 14:15:02 main systemd: Starting Preprocess NFS configuration... Mar 30 14:15:02 main systemd: Started Preprocess NFS configuration. Mar 30 14:15:02 main systemd: Starting NFSv4 ID-name mapping service... Mar 30 14:15:02 main systemd: Starting NFS Mount Daemon... Mar 30 14:15:02 main systemd: Started NFSv4 ID-name mapping service. Mar 30 14:15:02 main rpc.mountd[82263]: Version 1.3.0 starting Mar 30 14:15:02 main systemd: Started NFS Mount Daemon. Mar 30 14:15:02 main systemd: Starting NFS server and services... Mar 30 14:15:02 main kernel: NFSD: starting 90-second grace period (net ffffffffb0b16200) Mar 30 14:15:02 main systemd: Reloading GSSAPI Proxy Daemon. Mar 30 14:15:02 main systemd: Reloaded GSSAPI Proxy Daemon. Mar 30 14:15:02 main systemd: Started NFS server and services. Mar 30 14:15:02 main systemd: Starting Notify NFS peers of a restart... Mar 30 14:15:02 main sm-notify[82289]: Version 1.3.0 starting Mar 30 14:15:02 main sm-notify[82289]: Already notifying clients; Exiting! Mar 30 14:15:02 main systemd: Started Notify NFS peers of a restart. 2.主设备keepalived掉点查看VIP和挂载目录是否能够飘逸到备设备 [rootmain keepalived]# systemctl stop keepalived.service [rootserverc keepalived]# ip a |grep ens33 -A1 #VIP已漂移 2: ens33: BROADCAST,MULTICAST,UP,LOWER_UP mtu 1500 qdisc pfifo_fast state UP group default qlen 1000link/ether 00:0c:29:2b:95:b3 brd ff:ff:ff:ff:ff:ffinet 192.168.2.133/24 brd 192.168.2.255 scope global noprefixroute ens33valid_lft forever preferred_lft foreverinet 192.168.2.100/32 scope global ens33valid_lft foreve preferred_lft forever [rootserverc keepalived]# df -h #挂载漂移 Filesystem Size Used Avail Use% Mounted on devtmpfs 2.9G 0 2.9G 0% /dev tmpfs 2.9G 0 2.9G 0% /dev/shm tmpfs 2.9G 20M 2.9G 1% /run tmpfs 2.9G 0 2.9G 0% /sys/fs/cgroup /dev/mapper/centos-root 17G 4.1G 13G 25% / /dev/sda1 1014M 272M 743M 27% /boot /dev/sr0 4.4G 4.4G 0 100% /cdrom tmpfs 585M 0 585M 0% /run/user/0 /dev/drbd0 20G 33M 20G 1% /data #日志情况如下 Mar 30 15:08:13 main Keepalived_vrrp[116817]: Reset promote_secondaries counter 0 Mar 30 15:08:13 main Keepalived_vrrp[116817]: (VI_1) Entering BACKUP STATE (init) Mar 30 15:08:13 main Keepalived_vrrp[116817]: VRRP sockpool: [ifindex( 2), family(IPv4), proto(112), fd(12,13) multicast, address(224.0.0.18)] Mar 30 15:08:13 main Keepalived_vrrp[116817]: VRRP_Script(chk_nfs) succeeded Mar 30 15:08:13 main rpc.mountd[114695]: Caught signal 15, un-registering and exiting. Mar 30 15:08:13 main kernel: drbd r0 serverc: Preparing remote state change 1490261391 Mar 30 15:08:13 main kernel: drbd r0 serverc: Committing remote state change 1490261391 (primary_nodes1) Mar 30 15:08:13 main kernel: drbd r0 serverc: peer( Secondary - Primary ) [remote] Mar 30 15:08:13 main kernel: drbd r0/0 drbd0: Disabling local AL-updates ([rootserverc keepalived]# drbdadm status r0 #serverc此时变为主#main变为备 r0 role:Primarydisk:UpToDatemain role:Secondarypeer-disk:UpToDate