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

[Heitor Lessa]

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@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: 答复: [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.
 
 
 
 
 




发件人: ocfs2-users-bounces at oss.oracle.com
 [mailto:ocfs2-users-bounces at oss.oracle.com] 代表
Heitor Lessa

发送时间: 2012年6月22日
 19:55

收件人: ocfs2-users at oss.oracle.com

主题: [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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