mfs分布式存储+master端高可用
n2fy
9年前
（master采用keepalived+drbd实现高可用）
mfsmaster 172.25.254.10
mfsbackup 172.25.254.11
VIP 是172.25.254.12
mfsmaster 和mfsbackup一定要主机名解析,同时主机名也必须和主机名解析一致。
uname -n查看你的名字~
drbd配置:
Mfsmaster mfsbackup 都做以下操作,首先安装包，这是我自己打的rpm包。
安装即可
vim /etc/drbd.d/mfs.res
1 resource mfs { 2 meta-disk internal; 3 device /dev/drbd1; 4 syncer { 5 verify-alg sha1; 6 } 7 on mfsmaster { 8 disk /dev/vda1; 9 address 172.25.254.10:7789; 10 } 11 on mfsbackup { 12 disk /dev/vda1; 13 address 172.25.254.11:7789; 14 } 15 } 安装mfs master
[root@mfsmaster etc]# cd /etc [root@mfsmaster etc]# mv mfsmaster.cfg.dist mfsmaster.cfg [root@mfsmaster etc]# mv mfsexports.cfg.dist mfsexports.cfg [root@mfsmaster etc]# mv mfsmetalogger.cfg.dist mfsmetalogger.cfg [root@mfsmaster etc]# mv mfstopology.cfg.dist mfstopology.cfg
vim mfsmaster.cfg
1
WORKING_USER = nobody 2 WORKING_GROUP = nobody 3 SYSLOG_IDENT = mfsmaster 4 LOCK_MEMORY = 0 5 NICE_LEVEL = -19 6 7 EXPORTS_FILENAME = /etc/mfsexports.cfg 8 9 TOPOLOGY_FILENAME = /etc/mfstopology.cfg 10 11 DATA_PATH = /data1/drbd 12 13 BACK_LOGS = 50 14 BACK_META_KEEP_PREVIOUS = 1 15 16 REPLICATIONS_DELAY_INIT = 300 17 REPLICATIONS_DELAY_DISCONNECT = 3600 18 19 MATOML_LISTEN_HOST = * 20 MATOML_LISTEN_PORT = 9419 21 22 MATOCS_LISTEN_HOST = * 23 MATOCS_LISTEN_PORT = 9420 24 25 MATOCL_LISTEN_HOST = * 26 MATOCL_LISTEN_PORT = 9421 27 28 CHUNKS_LOOP_CPS = 100000 29 CHUNKS_LOOP_TIME = 300 30 31 CHUNKS_SOFT_DEL_LIMIT = 10 32 CHUNKS_HARD_DEL_LIMIT = 25 33 CHUNKS_WRITE_REP_LIMIT = 2 34 CHUNKS_READ_REP_LIMIT = 10 35 36 REJECT_OLD_CLIENTS = 0
vim mfsmetalogger.cfg
1 WORKING_USER = nobody 2 WORKING_GROUP = nobody 3 SYSLOG_IDENT = mfsmetalogger 4 LOCK_MEMORY = 0 5 NICE_LEVEL = -19 6 7 DATA_PATH = /var/lib/mfs 8 9 BACK_LOGS = 50 10 BACK_META_KEEP_PREVIOUS = 3 11 META_DOWNLOAD_FREQ = 24 12 13 MASTER_RECONNECTION_DELAY = 5 14 15 MASTER_HOST = mfsmaster 16 MASTER_PORT = 9419 17 18 MASTER_TIMEOUT = 60
ok 为了方便，直接把这几个文件复制到mfsbackup上就可以
[root@mfsmaster etc]# scp mfs* 172.25.254.11:/etc/ root@172.25.254.11's password: mfsexports.cfg 100% 4060 4.0KB/s 00:00 mfsmaster.cfg 100% 849 0.8KB/s 00:00 mfsmetalogger.cfg 100% 401 0.4KB/s 00:00 mfstopology.cfg 100% 1123 1.1KB/s 00:00
master上执行
[root@mfsmaster etc]# drbdsetup /dev/drbd1 primary --force [root@mfsmaster etc]# mkfs.ext4 /dev/drbd1
都执行
mkdir -p /data1/drbdchown -R nobody.nobody /data1/drbd/
[root@mfsmaster mfs]# cp /var/lib/mfs/metadata.mfs.empty /data1/drbd/ [root@mfsmaster drbd]# mv metadata.mfs.empty metadata.mfs [root@mfsmaster drbd]# mfsmaster
ok master 已经可以正常运行了
,为了保证无误我们在backup上也测试一次。
[root@mfsmaster drbd]# mfsmaster stop [root@mfsmaster drbd]# cd[root@mfsmaster ~] # umount /dev/drbd1 [root@mfsmaster ~]# drbdadm secondary mfs
[root@mfsbackup drbd+mfs-rpm]# drbdadm primary mfs [root@mfsbackup drbd+mfs-rpm]# mount /dev/drbd1 /data1/drbd/ [root@mfsbackup drbd+mfs-rpm]# mfsmaster
这个时候我们的master端已经全线部署完成，接下来我们要实现他的高可用，这个很重要
首先说明，我使用自己的方法很简单的实现主断备启，但是是一次性的，也就是说，只支持一次主的mfsmaster断了，backup可以接替，并不能来回。需要手工操作。
脚本写的简单后续有时间修改，网上有很多成品的，虽然很菜还是写自己的。。
同样是keepalived +drbd大神们都是全自动的
我这其实是一次性的但是轻量简单呗。
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安装keepalived 两端执行：
yum install gcc openssl-devel popt-devel -y ./configure --prefix=/usr/local/keepalived [root@mfsmaster keepalived-1.2.8]# make && make install [root@mfsmaster ~]# ln -s /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/ [root@mfsmaster ~]# ln -s /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/ [root@mfsmaster ~]# ln -s /usr/local/keepalived/etc/keepalived /etc/ [root@mfsmaster ~]# ln -s /usr/local/keepalived/sbin/keepalived /usr/sbin [root@mfsmaster ~]# vim /etc/keepalived/keepalived.conf
1 ! Configuration File for keepalived 2 3 global_defs { 4 notification_email { 5 576786031@qq.com 6 } 7 notification_email_from zabbix@server2.com 8 smtp_server 172.25.254.2 9 smtp_connect_timeout 30 10 router_id mfs_master 11 } 12 vrrp_script check_drbd { 13 script "/etc/keepalived/check_drbd.sh" 14 interval 15 15 } 16 vrrp_instance mfs { 17 state MASTER 18 interface eth0 19 virtual_router_id 51 20 priority 150 21 advert_int 1 22 authentication { 23 auth_type PASS 24 auth_pass 1111 25 } 26 virtual_ipaddress { 27 172.25.254.12 28 } 29 track_script { 30 check_drbd 31 } 32 notify_master /etc/keepalived/master.sh 33 notify_backup /etc/keepalived/backup.sh 34 } ~ [root@mfsmaster keepalived]# vim check_drbd.sh
1 /bin/bash: Configuration: command not found 2 # File Name: check_drbd.sh 3 # Author: dty 4 # mail: 576786031@qq.com 5 # Created Time: Sun 02 Aug 2015 01:32:43 PM CST 6 ######################################################################### 7 #!/bin/bash 8 A=`ps -C mfsmaster --no-header |wc -l` 9 if [ $A -eq 0 ];then 10 umount /data1/drbd/ 11 drbdadm secondary mfs 12 killall keepalived 13 fi 14
mfsbackup 上 cd /etc/keepalived 写两个脚本 master.sh backup.sh
[root@mfsbackup keepalived]# cat backup.sh master.sh #!/bin/bash mfsmaster stop umount /dev/drbd1 drbdadm secondary mfs ######################################################################### # File Name: master.sh # Author: dty # mail: 576786031@qq.com # Created Time: Sun 02 Aug 2015 01:38:12 PM CST ######################################################################### #!/bin/bash drbdadm primary mfs mount /dev/drbd1 /data1/drbd mfsmaster start
vim /etc/keepalived.conf
1 ! Configuration File for keepalived 2 3 global_defs { 4 notification_email { 5 576786031@qq.com 6 } 7 notification_email_from zabbix@server2.com 8 smtp_server 172.25.254.2 9 smtp_connect_timeout 30 10 router_id mfs_master 11 } 12 vrrp_instance mfs { 13 state BACKUP 14 interface eth0 15 virtual_router_id 51 16 priority 80 17 advert_int 1 18 authentication { 19 auth_type PASS 20 auth_pass 1111 21 } 22 virtual_ipaddress { 23 172.25.254.12 24 } 25 notify_master /etc/keepalived/master.sh 26 notify_backup /etc/keepalived/backup.sh 27 } ~
~
此时我们可以实验了
开启mfsmaster，
开启keepalived
mfsbackup上也启动 keepalived
[root@mfsbackup keepalived]# /etc/init.d/keepalived start
我们把主上的mfsmaster关掉
可以看到vip已经没了，转移到了备机上
服务已经完美转移了 。
这个时候我们来搞定客户端和chunkserver的安装
yum localinstall mfs-chunkserver-1.6.26-1.x86_64.rpm -y
mv mfschunkserver.cfg.dist mfschunkserver
mkdir -p /data1/mfs //设置个目录存放数据
chown nobody.nobody /data1/mfs
vim /etc/mfschunkserver
1 WORKING_USER = nobody 2 WORKING_GROUP = nobody 3 SYSLOG_IDENT = mfschunkserver 4 LOCK_MEMORY = 0 5 NICE_LEVEL = -19 6 7 DATA_PATH = /data1/mfs 8 9 MASTER_RECONNECTION_DELAY = 5 10 11 BIND_HOST = * 12 MASTER_HOST = 172.25.254.12 13 MASTER_PORT = 9420 14 15 MASTER_TIMEOUT = 60 16 17 CSSERV_LISTEN_HOST = * 18 CSSERV_LISTEN_PORT = 9422 19 20 HDD_CONF_FILENAME = /etc/mfshdd.cfg 21 HDD_TEST_FREQ = 10
设置chunk存放路径
[root@server7 ~]# cat /etc/mfshdd.cfg # mount points of HDD drives # #/mnt/hd1 #/mnt/hd2 #etc. /data1/mfs/
chunkserver已经部署完成了有多个以此类推就好了.
下来就是客户端的安装及使用了
# yum localinstall -y mfs-client-1.6.26-1.x86_64.rpm # cd /etc# cp mfsmount.cfg.dist mfsmount.cfg # vi mfsmount.cfg定义客户端默认挂载mfsmaster=mfsmaster/mnt/mfs# mfsmount [root@server4 ~]# df -h Filesystem Size Used Avail Use% Mounted on/dev/mapper/VolGroup-lv_root 6.7G 978M 5.4G 16% /tmpfs 499M 0 499M 0% /dev/shm/dev/sda1 485M 33M 427M 8% /boot172.25.254.12:9421 16G 0 16G 0% /mnt/mfs
inodes with permission denied: 0
[root@server4 mfs]# cp /etc/passwd leaf1 [root@server4 mfs]# cp /etc/passwd leaf2 [root@server4 mfs]# mfsfileinfo leaf1/passwd
leaf1/passwd: chunk 0: 0000000000000008_00000001 / (id:8 ver:1) copy 1: 172.25.254.7:9422 [root@server4 mfs]# mfsfileinfo leaf2/passwd leaf2/passwd: chunk 0: 0000000000000009_00000001 / (id:9 ver:1) copy 1: 172.25.254.8:9422 copy 2: 172.25.254.9:9422 ok 效果就这样粗来了
其他的mfs的使用这里不做赘述，主要为了验证我们的高可用机制是否可行，就到这里了
ps：当出现问题调转到backup后，如果主的正常了，我们手动切换必须遵守以下步骤
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停掉mfsmaster服务
mfsmaster stop
umount /dev/drbd1
drbdadm secondary mfs
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主机：
1.drbdadm primary mfs
2.mount /dev/drbd1 /data1/drbd
3.mfsmaster start
4.keepalived start
还有要提到的就是可能会出现脑裂，这一般时操作不按顺序，也可能有其他原因，下面是网上大神写的，
脑裂的处理方法
drbd1主,drbd2辅
1，正常情况下状态： [root@drbd1 ~]# cat /proc/drbd version: 8.3.8 (api:88/proto:86-94) : 299AFE04D7AFD98B3CA0AF9 0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r---- ns:2144476 nr:0 dw:36468 dr:2115769 al:14 bm:129 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0 [root@drbd2 ~]# cat /proc/drbd version: 8.3.8 (api:88/proto:86-94) srcversion: 299AFE04D7AFD98B3CA0AF9 0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r---- ns:0 nr:2141684 dw:2141684 dr:0 al:0 bm:130 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0 2，drbd1故障后 drbd1状态： [root@drbd1 ~]# cat /proc/drbd version: 8.3.8 (api:88/proto:86-94) srcversion: 299AFE04D7AFD98B3CA0AF9 0: cs:StandAlone ro:Primary/Unknown ds:UpToDate/DUnknown r---- ns:4 nr:102664 dw:102668 dr:157 al:1 bm:8 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0 drbd2的状态： [root@drbd2 ~]# cat /proc/drbd version: 8.3.8 (api:88/proto:86-94) srcversion: 299AFE04D7AFD98B3CA0AF9 0: cs:WFConnection ro:Secondary/Unknown ds:UpToDate/DUnknown C r---- ns:0 nr:2141684 dw:2141684 dr:0 al:0 bm:130 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0 3，处理方法： a，将secondary配置成primary角色 [root@drbd2 ~]# drbdsetup /dev/drbd0 primary -o [root@drbd2 ~]# cat /proc/drbd version: 8.3.8 (api:88/proto:86-94) srcversion: 299AFE04D7AFD98B3CA0AF9 0: cs:WFConnection ro:Primary/Unknown ds:UpToDate/Outdated C r---- ns:0 nr:2141684 dw:2141684 dr:0 al:0 bm:130 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0 挂载： [root@drbd2 /]# mount /dev/drbd0 /data1 [root@drbd2 data1]# ll total 10272 -rw-r--r-- 1 root root 10485760 Feb 13 11:26 aa.img drwx------ 2 root root 16384 Feb 13 11:25 lost+found 这个时候drbd2开始提供服务，开始写数据 drbd1主恢复正常后： [root@drbd1 ~]# cat /proc/drbd version: 8.3.8 (api:88/proto:86-94) srcversion: 299AFE04D7AFD98B3CA0AF9 0: cs:StandAlone ro:Primary/Unknown ds:UpToDate/DUnknown r---- ns:2144476 nr:0 dw:36484 dr:2115769 al:14 bm:129 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:8 drbd1状态是:StandAlone，此时，drbd1是不会和drbd2互相联系的 我们来查看下日志： [root@drbd1 ~]# tailf /var/log/messages Feb 13 16:14:27 drbd1 kernel: block drbd0: helper command: /sbin/drbdadm split-brain minor-0 Feb 13 16:14:27 drbd1 kernel: block drbd0: helper command: /sbin/drbdadm split-brain minor-0 exit code 0 (0x0) Feb 13 16:14:27 drbd1 kernel: block drbd0: conn( WFReportParams -> Disconnecting ) Feb 13 16:14:27 drbd1 kernel: block drbd0: error receiving ReportState, l: 4! Feb 13 16:14:27 drbd1 kernel: block drbd0: asender terminated Feb 13 16:14:27 drbd1 kernel: block drbd0: Terminating drbd0_asender Feb 13 16:14:27 drbd1 kernel: block drbd0: Connection closed Feb 13 16:14:27 drbd1 kernel: block drbd0: conn( Disconnecting -> StandAlone ) Feb 13 16:14:27 drbd1 kernel: block drbd0: receiver terminated Feb 13 16:14:27 drbd1 kernel: block drbd0: Terminating drbd0_receiver 脑裂出现！ 解决方法： 1>,我们需要将现在的drbd1角色修改为secondary [root@drbd1 ~]# drbdadm secondary r0 [root@drbd1 ~]# drbdadm -- --discard-my-data connect r0 ##该命令告诉drbd，secondary上的数据不正确，以primary上的数据为准。 2>，我们还需要在drbd2上执行下面操作 [root@drbd2 /]# drbdadm connect r0 这样drbd1就能和drbd2开始连接上了，并且保证数据不会丢失： [root@drbd1 ~]# cat /proc/drbd version: 8.3.8 (api:88/proto:86-94) srcversion: 299AFE04D7AFD98B3CA0AF9 0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r---- ns:0 nr:20592 dw:20592 dr:0 al:0 bm:4 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0
ok 就这样了。 未完待续。。。。。
来自：http://my.oschina.net/loveleaf/blog/486699