Moosefs Dual Master switch

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##### Network Architecture #####
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(a) Network architecture
M1:192.168.1.138 primary server, storage block server, client
m2:192.168.1.139 log server, backup master server, storage block server

(ii) Two-machine switching test
1 Stop the Mfsmaster on the M1
[Email protected] ~]#/data/apps/mfs/sbin/mfsmaster-s
At this time
[[email protected] ~]# Ls/data/wwwroot/web/sharemfs # There is a problem and cannot be viewed. Description Mfsmaster Stop Effective

2 running the master on M2
[[email protected] ~]# vi/data/apps/mfs/etc/mfsexports.cfg # change mount file to same as M1
[[email protected] ~]# vi/data/apps/mfs/etc/mfsmaster.cfg # modify mfsmaster config file to be the same as M1
[[email protected] ~]#/data/apps/mfs/sbin/mfsmetarestore-a # fix
[[email protected] ~]#/data/apps/mfs/sbin/mfsmaster Start # Startup

3 Chunkserver's/etc/hosts file will update the original Mfsmaster record. (because we're not using the hostname in front of us, we're going to change the Chunkserver configuration file)
[Email protected] ~]# vi/data/apps/mfs/etc/mfschunkserver.cfg

Master_host = 192.168.1.139
[Email protected] ~]# vi/data/apps/mfs/etc/mfschunkserver.cfg
Master_host = 192.168.1.139
# Restart the service (# Here is a problem when reloading the configuration (reload), so reboot directly)
[Email protected] ~]#/data/apps/mfs/sbin/mfschunkserver-s
[[email protected] ~]#/data/apps/mfs/sbin/mfschunkserver start
[Email protected] ~]#/data/apps/mfs/sbin/mfschunkserver-s
[[email protected] ~]#/data/apps/mfs/sbin/mfschunkserver start


4 opening the Mfsmetalogger service on M1
[Email protected] ~]# cp/data/apps/mfs/etc/mfsmetalogger.cfg.dist/data/apps/mfs/etc/mfsmetalogger.cfg
[Email protected] ~]# vi/data/apps/mfs/etc/mfsmetalogger.cfg
Master_host = 192.168.1.139 # changed to the IP and port of the current meta-server
Master_port = 9419

[[email protected] ~]#/data/apps/mfs/sbin/mfsmetalogger-s # M2 on log server stop
[[email protected] ~]#/data/apps/mfs/sbin/mfsmetalogger start # M1 on log server

5 Re-mount
[Email protected] ~]# Umount/data/wwwroot/web/sharemfs
[Email protected] ~]#/data/apps/mfsclient/bin/mfsmount/data/wwwroot/web/sharemfs-p-H 192.168.1.139
MFS Password:
Mfsmaster accepted connection with PARAMETERS:READ-WRITE,RESTRICTED_IP; Root mapped to Root:root
[[email protected] ~]# Ls/data/wwwroot/web/sharemfs # View data discovery data exists
1.txt 2.txt 3.txt 4.txt 5.txt 6.txt 9.txt html1 html2 mfs_down_test.txt mfsshare

6 Now we add a file to switch the service back
[Email protected] sharemfs]# echo "101010101" > 10.txt

Process as
Operation on 6.1 M1
[[email protected] ~]#/data/apps/mfs/sbin/mfsmaster start # mfsmaster start
[[email protected] ~]# VI/DATA/APPS/MFS/ETC/MFSCHUNKSERVER.CFG # block Server configuration Restore

# Block Server restart
[Email protected] ~]#/data/apps/mfs/sbin/mfschunkserver-s
[[email protected] ~]#/data/apps/mfs/sbin/mfschunkserver start

# Log Server stopped
[Email protected] ~]#/data/apps/mfs/sbin/mfsmetalogger-s

# re-mount
[Email protected] ~]# Umount/data/wwwroot/web/sharemfs
[Email protected] ~]#/data/apps/mfsclient/bin/mfsmount/data/wwwroot/web/sharemfs-p-H 192.168.1.138

Operation on 6.2 M2
[[email protected] ~]#/data/apps/mfs/sbin/mfsmaster-s # mfsmaster Stop
[[email protected] ~]#/VI/DATA/APPS/MFS/ETC/MFSCHUNKSERVER.CFG # block Server configuration Restore

# Block Server restart
[Email protected] ~]#/data/apps/mfs/sbin/mfschunkserver-s
[[email protected] ~]#/data/apps/mfs/sbin/mfschunkserver start

# Log Server Startup
[[email protected] ~]#/data/apps/mfs/sbin/mfsmetalogger start

6.3 M1 to view the new file's data or exist
[Email protected] ~]# Cd/data/wwwroot/web/sharemfs
[[email protected] ~]# ls
[email protected] ~]# cat 10.txt

Moosefs Dual Master switch