MFS利用pacemaker+corosync+iscsi实现高可用

水深无声 2022-05-29 11:16 165阅读 0赞

*  上一篇文章介绍了`MFS`的安装和配置,由于`MFS`自身的`Mfslogger`本身的的不可靠性,这里的高可用是对于单节点`mfs master`来进行配置的,`mfs master` 处理用户的挂载请求,并且分发数据,很容易成为节点的故障所在;
 *  这里来配置`MFS+pacemaker+corosync+iscsi`集群的高可用性
 *  首先列出上次服务的规划
    
    > `Client: server6.com 172.25.23.6`  
    > `Master: server7.com 172.25.23.7`  
    > `Metalogger: server8.com 172.25.23.8` \[这个废弃\]  
    > `Chunkserver: server9.com 172.25.23.9 sever10.com 172.25.23.10`
 *  在上次规划上面进行如下的修改
    
    > `Client: server6.com 172.25.23.6`  
    > `Master: server7.com 172.25.23.7`  
    > `Metalogger: server8.com 172.25.23.8` \[这个废弃\]  
    > `Chunkserver: server9.com 172.25.23.9 sever10.com 172.25.23.10`  
    > `iscsi starget: server10.com`  
    > `iscsi initiator: server6.com server7.com`  
    > `pacemaker + corosync`配置在`server6.com server7.com`上面,并且提供`VIP`
 *  首先配置`ISCSI starget`给节点`server6.com server7.com`来使用  
    [ISCSI详细的配置过程参考][ISCSI]

[root@server10 ~]# fdisk /dev/vdc 
    [root@server10 ~]# partx /dev/vdc
    [root@server10 ~]# mkfs.ext4 /dev/vdc1
    [root@server10 ~]# vim /etc/tgt/targets.conf
    添加
    <target iqn.2018-03.com.server10:testscsi>
            backing-store /srv/iscsi/disk1.img
            backing-store /dev/vdb1
            backing-store /dev/server/iscsi
    
        initiator-address 172.25.23.0/24
        incominguser westos westos
        write-cache off
    </target>
    [root@server10 ~]# /etc/init.d/tgtd start
    [root@server10 ~]# chkconfig tgtd on

*  然后配置`iscsi initiator`两台服务器

[root@server6 mnt]# vim /etc/iscsi/iscsid.conf
    更改或者添加:
    node.session.auth.username = westos
    node.session.auth.password = westos
    discovery.sendtargets.auth.username = westos
    discovery.sendtargets.auth.password = westos
    [root@server6 mnt]# scp /etc/iscsi/iscsid.conf 172.25.23.7:/etc/iscsi/
    iscsid.conf                                   100%   11KB  11.3KB/s   00:00

*  在另一个节点上面下载同样的软件,因为这里将配置文件复制给另一个节点,所以下载服务之后可以直接启动
 *  两个结点上面启动服务,并且检测`target`查看结果是否正常

[root@server6 mnt]# /etc/init.d/iscsi start
    [root@server6 mnt]# iscsiadm -m discovery -t sendtargets -p 172.25.23.10
    Starting iscsid:                                           [  OK  ]
    172.25.23.10:3260,1 iqn.2018-03.com.server10:testscsi
    [root@server7 x86_64]# /etc/init.d/iscsi start
    [root@server7 x86_64]# iscsiadm -m discovery -t sendtargets -p 172.25.23.10
    Starting iscsid:                                           [  OK  ]
    172.25.23.10:3260,1 iqn.2018-03.com.server10:testscsi

*  然后进行登陆操作

[root@server6 mnt]# iscsiadm -m node -T iqn.2018-03.com.server10:testscsi --login
    [root@server7 mnt]# iscsiadm -m node -T iqn.2018-03.com.server10:testscsi --login
    得到了新的设备
    Disk /dev/sda: 5368 MB, 5368398336 bytes
    166 heads, 62 sectors/track, 1018 cylinders
    Units = cylinders of 10292 * 512 = 5269504 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x00000000
    对这块设备进行格式化
    [root@server6 mnt]# mkfs.ext4 /dev/sda

*  **首先需要挂载这块硬盘将重要的信息复制到这块硬盘里面**
 *  这个过程就是在停止`mfsmaster`之后,然后将`master`产生的所有文件复制到`/dev/sda1`文件里面,然后将这个分区挂载到`mfs master`的目录,重新启动服务;

[root@server7 x86_64]# mount /dev/sda /mnt/
    [root@server7 mnt]# mfsmaster stop
    [root@server7 mnt]# cp /var/lib/mfs/* .
    [root@server7 mnt]# ls
    changelog.10.mfs  changelog.4.mfs  changelog.9.mfs      metadata.mfs.empty
    changelog.11.mfs  changelog.5.mfs  lost+found           stats.mfs
    changelog.15.mfs  changelog.6.mfs  metadata.mfs
    changelog.16.mfs  changelog.7.mfs  metadata.mfs.back.1
    [root@server7 mnt]# chown mfs.mfs -R /mnt/
    [root@server7 /]# mount /dev/sda1 /var/lib/mfs/

*  提供可以使用的服务启动脚本

[root@server7 init.d]# cat mfsd 
    
    # cat /etc/init.d/mfs
    #!/bin/bash
    #
    # Init file for the MooseFS master service
    #
    # chkconfig: - 92 84
    #
    # description: MooseFS master
    #
    # processname: mfsmaster
    # Source function library.
    # Source networking configuration.
    . /etc/init.d/functions
    . /etc/sysconfig/network
    # Source initialization configuration.
    # Check that networking is up.
    [ "${NETWORKING}" == "no" ] && exit 0
    [ -x "/usr/sbin/mfsmaster" ] || exit 1
    [ -r "/etc/mfs/mfsmaster.cfg" ] || exit 1
    [ -r "/etc/mfs/mfsexports.cfg" ] || exit 1
    RETVAL=0
    prog="mfsmaster"
    datadir="/var/lib/mfs"
    mfsbin="/usr/sbin/mfsmaster"
    start () {
    echo -n $"Starting $prog: "
    $mfsbin  >/dev/null 2>&1
    if [ $? -ne 0 ];then
    $mfsbin -a >/dev/null 2>&1 
    fi
    RETVAL=$?
    echo
    return $RETVAL
    }
    stop () {
    echo -n $"Stopping $prog: "
    $mfsbin stop >/dev/null 2>&1 || killall -9 $prog #>/dev/null 2>&1
    RETVAL=$?
    echo
    return $RETVAL
    }
    restart () {
    stop
    start
    }
    reload () {
    echo -n $"reload $prog: "
    $mfsbin reload >/dev/null 2>&1
    RETVAL=$?
    echo
    return $RETVAL
    }
    restore () {
    echo -n $"restore $prog: "
    $mfsrestore -a >/dev/null 2>&1
    RETVAL=$?
    echo
    return $RETVAL
    }
    case "$1" in
    start)
    start
    ;;
    stop)
    stop
    ;;
    restart)
    restart
    ;;
    reload)
    reload
    ;;
    restore)
    restore
    ;;
    status)
    status $prog
    RETVAL=$?;;
    *)
    echo $"Usage: $0 {start|stop|restart|reload|restore|status}"
    RETVAL=1
    esac
    exit $RETVAL

*  测试这个脚本的正常功能然后将这个脚本复制到另一个管理节点上面

[root@server7 init.d]# /etc/init.d/mfsd start
    Starting mfsmaster: 
    [root@server7 init.d]# /etc/init.d/mfsd status
    mfsmaster (pid 1636) is running...
    [root@server7 init.d]# /etc/init.d/mfsd stop
    Stopping mfsmaster:

*  将这个文件复制到另一个节点上面

[root@server7 init.d]# scp mfsd 172.25.23.6:/etc/init.d/
    mfsd                                          100% 1363     1.3KB/s   00:00

*  接下来需要在`server6.com`上面配置`mfs master`服务

[root@server6 ~]# yum install moosefs-master-3.0.80-1.x86_64.rpm libpcap-* -y

*  停止`server7.com`上面的`mfs master`服务,卸载工作目录`/var/lib/mfs的挂载`然后在`server1.com`上面进行启动查看是否正常

[root@server6 ~]# iscsiadm -m node -T iqn.2018-03.com.server10:testscsi --login
    [root@server6 ~]# mount /dev/sda1 /var/lib/mfs/
    [root@server6 ~]# /etc/init.d/mfsd start
    [root@server6 ~]# /etc/init.d/mfsd status

*  这里查看两者`mfs`用户的`id`,如果不相同,就更改成一样的

[root@server6 ~]# id mfs
    uid=498(mfs) gid=499(mfs) groups=499(mfs)
    [root@server7 mnt]# id mfs
    uid=498(mfs) gid=499(mfs) groups=499(mfs)

*  接下来安装`pacemaker`

[root@server6 ~]# yum install pacemaker -y
    [root@server6 ~]# yum install pssh-2.3.1-2.1.x86_64.rpm crmsh-1.2.6-0.rc2.2.1.x86_64.rpm -y
    [root@server7 ~]# yum install pacemaker -y
    [root@server7 ~]# yum install crmsh-1.2.6-0.rc2.2.1.x86_64.rpm pssh-2.3.1-2.1.x86_64.rpm -y

*  接下来配置`pacemaker`

totem { version: 2 secauth: off threads: 0 interface { ringnumber: 0 bindnetaddr: 172.25.23.0 mcastaddr: 226.94.1.10 mcastport: 5405 ttl: 1 }
    }
    
    service { name: pacemaker ver: 0 }

*  然后将这个配置文件复制给另一个节点

[root@server7 corosync]# scp corosync.conf 172.25.23.6:/etc/corosync/
    corosync.conf                                 100%  485     0.5KB/s   00:00

*  **接下来启动`corosync`,添加`fence`设备**

[root@server6 ~]# /etc/init.d/corosync start
    [root@server7 corosync]# /etc/init.d/corosync start

*  首先确认真机的`fence_virtd.service`服务是启动的;

[root@my Desktop]# systemctl status fence_virtd.service 
    ● fence_virtd.service - Fence-Virt system host daemon
       Loaded: loaded (/usr/lib/systemd/system/fence_virtd.service; disabled; vendor preset: disabled)
       Active: active (running) since 四 2018-03-22 16:31:26 CST; 4h 4min ago
      Process: 21110 ExecStart=/usr/sbin/fence_virtd $FENCE_VIRTD_ARGS (code=exited, status=0/SUCCESS)
     Main PID: 21111 (fence_virtd)
       CGroup: /system.slice/fence_virtd.service
               └─21111 /usr/sbin/fence_virtd -w

*  将真机的`fence_xvm.key`给每一个`corosync`的节点

[root@my Desktop]# scp /etc/cluster/fence_xvm.key 172.25.23.6:/etc/cluster/
    fence_xvm.key                                 100%  128     0.1KB/s   00:00    
    [root@my Desktop]# scp /etc/cluster/fence_xvm.key 172.25.23.7:/etc/cluster/
    fence_xvm.key                                 100%  128     0.1KB/s   00:00

*  对于`fence`设备这里使用`fence_xvm`,所以首先查看是否有这个设备

[root@server7 corosync]# stonith_admin -I | grep xvm
    46 devices found
     fence_xvm
    [root@server6 ~]# stonith_admin -I | grep xvm
    46 devices found
     fence_xvm

*  如果不存在,需要安装`fence_xvm`;
 *  接下来配置`fence`设备

[root@server7 corosync]# crm
    crm(live)# configure 
    crm(live)configure# show
    node server6.com
    node server7.com
    property $id="cib-bootstrap-options" \
        dc-version="1.1.10-14.el6-368c726" \
        cluster-infrastructure="classic openais (with plugin)" \
        expected-quorum-votes="2"
    crm(live)configure# property no-quorum-policy=ignore
    crm(live)configure# commit

*  首先添加`fence`设备

[root@server7 corosync]# crm
    crm(live)# configure 
    crm(live)configure# show
    node server6.com
    node server7.com
    crm(live)configure# primitive vmfence stonith:fence_xvm params pcmk_host_map="server7.com:rhel6.5-6;server6.com:rhel6.5-5" op monitor interval=60s
    crm(live)configure# commit

*  接下来需要在两个节点上面创建目录,并且用于保存`fence`秘钥信息

[root@server6 corosync]# mkdir /etc/cluster
    [root@server7 corosync]# mkdir /etc/cluster
    [root@my Desktop]# scp /etc/cluster/fence_xvm.key 172.25.23.6:/etc/cluster/fence_xvm.key
    fence_xvm.key                                 100%  128     0.1KB/s   00:00    
    [root@my Desktop]# scp /etc/cluster/fence_xvm.key 172.25.23.7:/etc/cluster/fence_xvm.key
    fence_xvm.key

*  继续配置资源

crm(live)configure# primitive vip ocf:heartbeat:IPaddr2 params ip=172.25.23.100 cidr_netmask=32 op monitor interval=10s 
    crm(live)configure# commit

*  查看资源的运行状态  
    ![资源运行的节点对比][70]
 *  停止关于`mfs`的服务,并且修改`master`的解析信息

[root@server9 ~]# mfschunkserver stop
    sending SIGTERM to lock owner (pid:1104)
    waiting for termination terminated
    [root@server10 ~]# mfschunkserver stop
    sending SIGTERM to lock owner (pid:1103)
    waiting for termination terminated
    
    [root@server6 ~]# vim /etc/hosts
    172.25.23.100 mfsmaster

*  将修改的解析文件复制给每一个节点

[root@server6 ~]# for I in {
       7,8,9,10};do echo server$I.com; scp /etc/hosts 172.25.23.$I:/etc/hosts ; done 
    server7.com
    hosts                                                  100%  929     0.9KB/s   00:00    
    server8.com
    ssh: connect to host 172.25.23.8 port 22: No route to host
    lost connection
    server9.com
    hosts                                                  100%  929     0.9KB/s   00:00    
    server10.com
    hosts                                                  100%  929     0.9KB/s   00:00

*  再次添加一个资源,也就是文件系统资源

crm(live)configure# primitive mfsdata ocf:heartbeat:Filesystem params device=/dev/sda1 fstype=ext4 directory=/var/lib/mfs op monitor interval=30s

*  添加`lsb`风格的管理脚本

crm(live)configure# primitive mfsmaster lsb:mfsd op monitor interval=30s

*  将这几个资源定义为组资源

crm(live)configure# group mfsgroup vip mfsdata mfsmaster

*  之前这些资源运行在不同的节点上面  
    ![这里写图片描述][70 1]
 *  之后定义为组的资源,就运行在同一个节点上面  
    ![这里写图片描述][70 2]
 *  接下来启动集群的服务

[root@server9 ~]# mfschunkserver 
    open files limit has been set to: 16384 working directory: /var/lib/mfs lockfile created and locked setting glibc malloc arena max to 8 setting glibc malloc arena test to 1 initializing mfschunkserver modules ... hdd space manager: path to scan: /mnt/chunk1/ hdd space manager: start background hdd scanning (searching for available chunks) main server module: listen on *:9422 stats file has been loaded mfschunkserver daemon initialized properly [root@server10 ~]# mfschunkserver open files limit has been set to: 16384 working directory: /var/lib/mfs lockfile created and locked setting glibc malloc arena max to 8 setting glibc malloc arena test to 1 initializing mfschunkserver modules ... hdd space manager: path to scan: /mnt/chunk2/ hdd space manager: start background hdd scanning (searching for available chunks) main server module: listen on *:9422 stats file has been loaded mfschunkserver daemon initialized properly

*  这里可以看到关于组资源的信息

[root@server7 corosync]# ip addr show 
    1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
        link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
        inet 127.0.0.1/8 scope host lo
        inet6 ::1/128 scope host 
           valid_lft forever preferred_lft forever
    2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
        link/ether 52:54:00:0f:3e:c9 brd ff:ff:ff:ff:ff:ff
        inet 172.25.23.7/24 brd 172.25.23.255 scope global eth0
        inet 172.25.23.100/32 brd 172.25.23.255 scope global eth0
        inet6 fe80::5054:ff:fe0f:3ec9/64 scope link 
           valid_lft forever preferred_lft forever
    [root@server7 corosync]# df
    Filesystem                   1K-blocks    Used Available Use% Mounted on
    /dev/mapper/VolGroup-lv_root  18171208 1115856  16133268   7% / tmpfs 251136 21936 229200 9% /dev/shm /dev/vda1 495844 33448 436796 8% /boot
    /dev/sda1                      5156292  144964   4749400   3% /var/lib/mfs

*  这里是`mfs client`里面挂载的文件的信息

[root@server6 dir1]# ls
    bigfile  passwd
    [root@server6 dir1]# pwd
    /mnt/mfs/dir1
    [root@server6 dir1]# 
    元数据挂载的信息
    [root@server6 mfsmeta]# pwd
    /mnt/mfsmeta

*  这样一个`pacemaker + corosync + iscsi`组成的提供了`fence + VIP + filesystem + lsb`的`MFS`高可用集群就配置完成了;

[ISCSI]: https://blog.csdn.net/qq_36294875/article/details/79514247%20iscsi%E9%85%8D%E7%BD%AE%E5%8F%82%E8%80%83
[70]: /images/20220529/6040186934674473859b80324536178d.png
[70 1]: /images/20220529/78bfdf7dd5b247ee98bdf181f3e685d7.png
[70 2]: /images/20220529/2e62322397664e7d87abf264484cbdd6.png