Ocfs2 users - Jun 2012 - Renew IP address node came online again - Amazon EC2

Hi,
I was looking for why one of the nodes could not mount OCFS again, then I found
this path:
/sys/kernel/config/cluster/r0/node/

Which I have folders related to my servers, then I noticed that node1 (which is
working with OCFS2) did not update node2 IP address.
 The file I am talking about is:
/sys/kernel/config/cluster/r0/node/raid2/ipv4_address

Example:
root at node1:/sys/kernel/config/cluster/r0/node/node2# cat
ipv4_address10.227.43.31
root at node22:/sys/kernel/config/cluster/r0/node/node2# cat
ipv4_address10.54.19.4

The question is: How could I update it in order to get it working again Without
Restart ocfs service?
 Cluster.conf - Updated with new IP address OCFS2 Version - 1.4
 OS - Ubuntu Lucid
 Thank you very much.


 		 	   		  
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Hi,
 Sorry for delay. 

 Unfortunately this not going to work (tested by the way), once cluster
directory (under /sys/kernel/config/cluster/) is created when we start o2ctb
daemon, after that its not possible to handle any modify operation over that
(write()) manually. Once you try you will get an error - Operation not permitted
-- which is normal.
 Researching a little bit more, I have seen that OCFS2 1.4 does not support
modify nodes in a running cluster, then I check BugZilla to open a feature
request, however someone already created years and years ago with no response.
 Add a new node in a running cluster works fine, to remove or modify you have to
stop the whole cluster/mount points though.
-- When run a new node command you will get:
# Node node2 created
-- When run a modification command you will get:
# OCFS - Not yet supported
 At the moment we will have to use Amazon VPC once we will ensure that IP
address will not change And whether any bug occurs, we can simply replace such
NIC to another node and so on.
References:
OCFS BugZilla -
https://oss.oracle.com/bugzilla/buglist.cgi?query_format=specific&order=relevance+desc&bug_status=__open__&product=&content=modify+nodeMailing
list thread -  http://www.mail-archive.com/ocfs2-users at
oss.oracle.com/msg00085.html   Quote from OCFS developer --         The o2cb
cluster stack currently only allows adding new nodesdynamically. All other ops,
modify/del, require the cluster to be down.

 Thank you very much for reply and I strongly believe that such clarification
will help someone else with the same issue.

Heitor Lessa


From: guozhonghua at h3c.com
To: heitor.lessa at hotmail.com
CC: ocfs2-users at oss.oracle.com
Subject: ??: [Ocfs2-users] Renew IP address node came online again - Amazon EC2
Date: Mon, 25 Jun 2012 11:32:21 +0000








Hi,

 
You can remove the directory of the node, and add it again with o2cb_ctl
command;

 
For example, Please refer to the man o2cb_ctl for details:


o2cb_ctl -C -i -n node2 -t node -a number= -a ip_address=New_IP -a
ip_port=New_port -a cluster=r0
 
At the same time, the cluster configure file should be changed according the new
IP address and the new port of the node.
 
 
 
 
 




???: ocfs2-users-bounces at oss.oracle.com
 [mailto:ocfs2-users-bounces at oss.oracle.com] ??
Heitor Lessa

????: 2012?6?22?
 19:55

???: ocfs2-users at oss.oracle.com

??: [Ocfs2-users]
 Renew IP address node came online again - Amazon EC2

 

Hi,

 


I was looking for why one of the nodes could not mount OCFS again, then I found
this path:


 


/sys/kernel/config/cluster/r0/node/



Which I have folders related to my servers, then I noticed that node1 (which is
working with OCFS2) did not update node2 IP address.


 


 The file I am talking about is:


 


/sys/kernel/config/cluster/r0/node/raid2/ipv4_address



Example:


 



root at node1:/sys/kernel/config/cluster/r0/node/node2# cat ipv4_address


10.227.43.31



 



root at node22:/sys/kernel/config/cluster/r0/node/node2# cat ipv4_address


10.54.19.4


 


 

The question is: How could I update it in order to get it working again Without
Restart ocfs service?


 


 Cluster.conf - Updated with new IP address


 OCFS2 Version - 1.4

 OS - Ubuntu Lucid


 


 Thank you very much.







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