[MooseFS-Users] Multi-Master setup - Failover not working

[Bernd B. <b....@ho...>]

Hallo togehter

First of all, Thanks to sales i am able to have a test License for the
Pro versions 3.0.38

i did set up 2 Servers as shared Master and Chunkserver with 5 Disks
each from scratch (no Metalogger)
I have 3 Proxmox Servers which i set up with moosfs-pro-clients
I changed my dns-server in the way, that it displays 

-------------------------------------------------------------------
root@proxmox-4:~# host mfsmaster
mfsmaster.holde.lan has address 10.120.3.162
mfsmaster.holde.lan has address 10.120.3.161
-------------------------------------------------------------------

In this setup the system works as expected with a very good performance

If i stop the leader with mfsmaster stop the follower ist promoted to master
If i start the old leader again with mfsmaster start that machine is
denoted as follower

so far so good and exected.

What i don't unterstand is the following behaviour


Status before test:
------------------------------------------------------------------------------
root@mfsmaster1:~# mfssupervisor
1 (10.120.3.161:9419) : FOLLOWER (leader ip: 10.120.3.162 ; meta
version: 126865 ; synchronized ; duration: 1511)
2 (10.120.3.162:9419) : LEADER (meta version: 126865 ; duration: 1504)
------------------------------------------------------------------------

mfsmaster1 is ip:xxx.161
mfsmaster2 is ip:xxx.162


If i poweroff the leader  (machine 162) Then i have this result

-------------------------------------------------------------------------------
root@mfsmaster1:~# mfssupervisor
10.120.3.162: connection timed out
master states:
1 (10.120.3.161:9419) : ELECT (meta version: 127149 ; synchronized ;
duration: 96)
2 (10.120.3.162:9419) : DEAD
-------------------------------------------------------------------------------------
The cgi shows additionally the message:

------------------------------------------------------------------
Leader master server not found, but there is an elect, so make sure that
all chnunkservers are running - elect should became a leader soon
------------------------------------------------------------------

This stays like this until the server is powered on again. There was no
change for over 15 min then i powereup the machine (162) again

--------------------------------------------------------------------------------------------
1 (10.120.3.161:9419) : LEADER (meta version: 127253 ; duration: 63)
2 (10.120.3.162:9419) : FOLLOWER (leader ip: 10.120.3.161 ; meta
version: 127253 ; synchronized ; duration: 69)
--------------------------------------------------------------------------------------------------------------


This is in both ways

I have the following questions to that

1. Do i have to have the master software on separate hardware to the
chunks ? so that master and chunk servers are physically spit systems ?

2. If that is the case how can i deal in a 2 storage Room situation with
2 UPS Systems and Master and Chunk Server on the same ups
    Do i experience the same behavior ihe if i loose one UPS System amd
with that 1 server with master service and one server vith chunk service?


I would be very thankful if somebody could give me a hint

Thanks in  advance

-- 


Mit freundlichen Grüßen


Bernd Burg

------------------------------------------------------------
HOLDE AG
Zum Roppertsborn 14, 66646 Marpingen

Telefon   +49-6827-267988-0
Telefax   +49-6827-267988-9

Email       b....@ho... <mailto:kr...@ac...>

Sitz der Gesellschaft: Marpingen
AG Saarbrücken, HRB 101630

Ust-Id-Nr.: DE29460253

Vorstand:
Dipl.-Ing. Bernd Burg

Aufsichtsrat:
Dipl.-Ing. Axel Gaus (Vorsitz)
Dipl.-Ing. Andreas Krolzig

Dipl.-Ing. Gabor Richter
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