Linux存储高可用DRBD 一主一备双机热备

灰太狼 2022-12-19 03:38 226阅读 0赞

准备

sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config
    setenforce 0
    systemctl disable firewalld
    systemctl stop firewalld
    hostnamectl set-hostname node1
    hostnamectl set-hostname node2
    echo '192.168.1.1 node1' >> /etc/hosts
    echo '192.168.1.2 node2' >> /etc/hosts
    ssh-keygen
    ssh-copy-id 192.168.1.1
    ssh-copy-id 192.168.1.2
    yum install ntp
    ntpdate ntp.api.bz

安装服务

rpm --import http://elrepo.org/RPM-GPG-KEY-elrepo.org
    rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm
    yum -y install drbd84-utils kmod-drbd84

配置/etc/drbd.d/global\_common.conf

global { 
        usage-count no;
    }
    common { 
        protocol C;
        handlers { 
            #pri-on-incon-degr "/usr/lib/drbd/notify-pri-on-incon-degr.sh; /usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ; reboot -f";
            #pri-lost-after-sb "/usr/lib/drbd/notify-pri-lost-after-sb.sh; /usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ; reboot -f";
            #local-io-error "/usr/lib/drbd/notify-io-error.sh; /usr/lib/drbd/notify-emergency-shutdown.sh; echo o > /proc/sysrq-trigger ; halt -f";
        }
        startup { 
            wfc-timeout 30;
            degr-wfc-timeout 30;
        }
        options { 
        }
        disk { 
            on-io-error detach;  
            fencing resource-only;
        }
        net { 
            cram-hmac-alg "sha1";  
            shared-secret "mydrbd";
            allow-two-primaries;
        }    
        syncer { 
            #rate 100M;
        }
    }

vim /etc/drbd.d/r0.res

resource r0 { 
            device /dev/drbd0;
            meta-disk internal;
            on node1 {    
            disk /dev/sdb1;
            address 192.168.245.100:7789;
            }  
            on node2 {    
            disk /dev/sdb1;
            address 192.168.245.101:7789;
            }  
    }

重启

scp -r /etc/drbd.d/* root@drbdBB:/etc/drbd.d/
    drbdadm create-md r0
    modprobe drbd
    drbdadm up r0
    drbdadm primary --force r0
    systemctl enable drbd
    systemctl start drbd
    cat /proc/drbd

mkfs.ext4 /dev/drbd0   格式化块存储
    mkdir /mydata                        //创建挂载点
    mount /dev/drbd0 /mydata/

主备切换

umount /mydata
    drbdadm secondary r0
    drbdadm primary r0