gmane.linux.redhat.cluster

Connection Reset when trying to brorwse luci webinterface

fosiul alam — 2012-05-26T18:12:34

Hi
I am trying cluster in my lab and I have 3 nodes.

in 1st node, i have installed luci as

yum install luci
then
luci_admin init

then service luci restart

Now when i am trying to browse the web interface
https://clstr1:8084/

from mozilla or internet explorer ,
its ask for Certificate but after that , its say: Connection reset  .
So the luci web page is not comming
Can any one tell me why ?

iptables is turned off and selinux is turned off.

Thanks for your help.

rgmanager is jamed

Nicolas Ross — 2012-05-25T16:20:43

I am in the process of upgrading one of our cluster from RHEL 6.1 to 
6.2. It's an 8-node cluster.

I started with one node. Stop all cluster resources, cman, rgmanager et 
al. yum update, reboot, move to next. The first one did ok.

On the second one, rgmanager started, but doesn't seem to connect to 
other nodes. I found this in dmesg :

INFO: task rgmanager:2901 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
rgmanager     D 0000000000000000     0  2901   2900 0x00000080
  ffff880667299d48 0000000000000082 0000000000000000 ffff8806656aa318
  ffff88066729c378 0000000000000001 ffff880665bb31b0 00007fffc6c6fa20
  ffff88066635a678 ffff880667299fd8 000000000000f4e8 ffff88066635a678
Call Trace:
  [<ffffffff814ee6fe>] __mutex_lock_slowpath+0x13e/0x180
  [<ffffffff814ee59b>] mutex_lock+0x2b/0x50
  [<ffffffffa02c192c>] dlm_new_lockspace+0x3c/0xa30 [dlm]
  [<ffffffff8115f74c>] ? __kmalloc+0x20c/0x220
  [<ffffffffa02ca94d>] device_write+0x30d/0x7d0 [dlm]

Is it possible to use quorum for CTDB to prevent split-brain and removing lockfile in the cluster file system

黃曉偉 — 2012-05-24T04:22:20

Hello list,

We know that CTDB uses lockfile in the cluster file system to prevent
split-brain.
It is a really good design when all nodes in the cluster can mount the
cluster file system (e.g. GPFS/GFS/GlusterFS) and CTDB can work happily in
this assumption.
However, when split-brain happens, the disconnected private network
violates this assumption usually.
For example, we have four nodes (A, B, C, D) in the cluster and GlusterFS
is the beckend.
GlusterFS and CTDB on all nodes communicate to each other via private
network and CTDB manages the public network.
If node A is disconnected in the private network, there will be group (A)
and group (B,C,D) in our cluster.
The election of recovery master will be triggered after the disconnected
determination of CTDB, i.e. the CTDB elects a new recovery master for each
group after 26 (KeepaliveInterval*KeepaliveLimits+1 by default) seconds.
Then node A will be the recovery master of group (A) and some node (e.g. B)
will be the recovery master of group (B,C,D).
Now, A

RHCS RHEL 6 GEO CLUSTER

Carlos Alberto Ramirez Rendon — 2012-05-09T20:18:14

Hi ,

I  want  know,  is RHCS  RHEL 6 GEO CLUSTER  supported ?,  What kind of
cases ?

Thanks for    your   reponse.
*
*

[PATCH] typo in fence_kdump_send.8

Masatake YAMATO — 2012-05-07T09:08:35

Signed-off-by: Masatake YAMATO<yamato< at >redhat.com>

diff --git a/fence/agents/kdump/fence_kdump_send.8 b/fence/agents/kdump/fence_kdump_send.8
index 4cec124..ab95836 100644
--- a/fence/agents/kdump/fence_kdump_send.8
+++ b/fence/agents/kdump/fence_kdump_send.8
< at >< at > -16,7 +16,7 < at >< at > kdump kernel after a cluster node has encountered a kernel panic. Once
 the cluster node has entered the kdump crash recovery service,
 \fIfence_kdump_send\fP will periodically send messages to all cluster
 nodes. When the \fIfence_kdump\fP agent receives a valid message from
-the failed not, fencing is complete.
+the failed node, fencing is complete.
 .SH OPTIONS
 .TP
 .B -p, --ipport=\fIPORT\fP

RHEL6 Cluster: Update corosync RPMs

Ralf Aumueller — 2012-05-03T10:36:24

Hello,

recently there was an update of corosync and corosynclib rpms. Is it save to
just install these updates on a running two node cluster or do I have to use a
special procedure (e.g. Stop cluster services on node2; apply updates and reboot
node2; move services to node2 and update node1).

Regards,
Ralf

Script failed to run on RHCS,but it is successful on manually

Wang, Kevin G1. (NSN - CN/Cheng Du — 2012-04-19T05:14:38

HI,

tomcat_agent script failed to run when RHCS started. But I can run it
successfully on manually. could you please check my script and tell me
what problem?Below is cluster configuration and script:
[root< at >db05 init.d]# cat /etc/cluster/cluster.conf
<?xml version="1.0"?>
<cluster config_version="4" name="NLS_Test">
        <fence_daemon post_fail_delay="0" post_join_delay="3"/>
        <clusternodes>
                <clusternode name="db05" nodeid="1" votes="1">
                        <fence>
                                <method name="1"/>
                        </fence>
                </clusternode>
                <clusternode name="db07" nodeid="2" votes="1">
                        <fence>
                                <method name="1"/>
                        </fence>
                </clusternode>
        </clusternodes>
        <cman expected_votes="1" two_node="1"/>
        <fencedevices>
                <fencedevice agent="fence_ipmilan" auth="none"
ipaddr="10.69.128.25" login="test" name

Step by Step installation process of Clustering inLinux

kailash kumawat — 2012-04-15T17:59:02

Hi

Can you send me the step by step installation and configuration process of
Clustering in rhel5

does RHCS support IBM db2 v9.7 DPF

2012-04-15T04:30:42

Dear All,

I find the list of services that RHCS supports in this document
Red_Hat_Enterprise_Linux-5-Cluster_Administration-en-US.pdf

Red Hat Cluster supports the following HA services:

    Apache
    Application (Script)
    LVM (HA LVM)
    MySQL
    NFS
    Open LDAP
    Oracle
    PostgreSQL 8
    Samba
    Note
    Red Hat Enterprise Linux 5 does not support running Clustered Samba in
an active/active configuration, in which Samba serves the same shared file
system from multiple nodes. Red Hat Enterprise Linux 5 does support running
Samba in a cluster in active/passive mode, with failover from one node to
the other nodes in a cluster. Note that if failover occurs, locking states
are lost and active connections to Samba are severed so that the clients
must reconnect.
    SAP
    Tomcat 5

so I can't deploy a db2 DPF database in RHCS environment?
what else ha software under linux can I choose?

AUTO: Massimo Mastrilli è assente dall'ufficio

2012-04-13T21:13:57

Sono fuori dall'ufficio da Ven 13/04/2012 fino a Sab 14/04/2012.




Nota: Questa è una risposta automatizzata al messaggio  "Re:
[Linux-cluster] Redhat without qdisk" inviata il 13/04/2012 11.20.27.

Questa è l'unica notifica che verrà ricevuta mentre la persona è assente.

LVM clustered snapshots support

Nicolas Ecarnot — 2012-04-13T20:23:21

Hi,

Before finishing our migration from windows 2003 storage servers to 
clustered samba, we hoped to provide our users the VSS feature.
It is working fine on a single server, but trying to create a snapshot 
with clvm (clustered LV) leads to the display of the message telling 
that clustered snapshots are not (yet) supported.

Following the LVM2 release notes, I see that since a big couple of 
months, a workaround has been implemented, and I was wondering if one of 
you has already used it in production?
In that case, I would be glad to hear from you to discuss about which 
better way you upgraded your LVM layer.

Thanks.

Node can't rejoin after failure if iptables isenabled

Benjamin Kingston — 2012-04-12T20:38:11

Hey guys, hopefully someone can help me here.

If I start both hosts up at the same time, they join just fine, but if I
reboot one, I have to disable iptables on both hosts

Here's the IP tables I have going for now after trying some troubleshooting:

# Firewall configuration written by system-config-firewall
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -i admin -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
-A INPUT -i local -s 10.254.99.4 -m state --state NEW -m tcp -p tcp --dport
22 -j ACCEPT
-A INPUT -i local -s 224.0.0.0/4 -m state --state NEW -j ACCEPT
-A INPUT -i local -s 239.192.86.2 -m state --state NEW -j ACCEPT
-A INPUT -i local -s 10.254.99.4 -m state --state NEW -m multiport -p udp
--dports 5404,5405 -j ACCEPT
-A INPUT -i local -s 10.254.99.4 -m state --state NEW -m tcp -p tcp --dport
11111

Redhat without qdisk

emmanuel segura — 2012-04-12T14:25:23

Hello all List

I have a big question about qdisk in a two cluster

one of out clients has too many cluster in two nodes configuration and one
RedHat technical came to us and said that there is no need to use the qdisk

I would to know if this is true

I really think it's a bad idea

Invitation to connect on LinkedIn

anuj chauhan via LinkedIn — 2012-04-12T05:12:38

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clurgmgrd : relocating a service to betternode

Parvez Shaikh — 2012-04-11T06:14:43

Hi,

When I start or enable a service (that was previously disabled) on a a
cluster node, I see message saying clurmgrd relocating service to "better"
node.

I am not understanding why. I can relocate service back to a node where I
see above message and it runs fine there.

What does "better" node could mean? Better in what sense as hardware and
software configurations of both cluster nodes is same. What situation could
possibly trigger this?

Thanks,
Parvez

checking syntax errors default_event_script.sl

Daniel Bourque — 2012-04-06T15:17:11

Hi,

background:

  I'm working on adding load balancing via RIND. I discovered that not every events are passed to event scripts defined in cluster.conf, therefore I have to modify  /usr/share/cluster/default_event_script.sl . In order to not have to restart rgmanager all the time, I changed  /usr/share/cluster/default_event_script.sl so that it contains only this:

evalfile("/<mount point available on all nodes>/default_event_script.sl");

This allows me to change the main RIND script live.

the problem:

I would like to work be able to work a copy, and do syntax error checks via "slsh -t" before overwriting the live one. I can't simply do that because slsh doesn't find the definition for all the functions and variables used in default_event_script.sl. where are the libraries I need to include in my SLSH_PATH ?

Thanks !


--
Daniel Bourque
Sr. Systems Engineer
AccuWeather

Office (316) 266-8013
Office (316) 266-8000 ext. 8013
Mobile (316) 640-1024

Cluster failure, dlm overload

wsfax alu.es — 2012-04-05T22:19:15

Hi,

First of all, thanks for your time.

A five node cluster that is sharing several GFS filesystem is having total
blocks of filesystem activity. Around one block each week. These blocks
appeared several weeks ago, after more than three years in service. Cluster
is restored after restart of all cluster nodes ;-)

When these blocks appears, we can see dlm send and receive process with a
high level of CPU consumption, network traffic is a also ten times the
normal one.

A capture (wireshark) of network traffic in DLM port shows thousand of
messages per second. In particular, all "request message" are replied with
a "request reply" where errno=EBADR, Lookup messages seems ok.

The cluster is with a software version a few outdated, the one of RedHat
2.6.18, but not possible to upgrade easily.

Any suggestion is welcome.

Kind regards,
ALU

qdiskd in heuristics mode only?

Gunther Schlegel — 2012-04-04T12:25:53

Hi,

is there any way to prevent fencing if the qdisk quorum partition can't 
be accessed? (yes, that does make sense!)

Scenario is like this:

- 2 node cluster, RHEL6.2, internal data storage (mysql 
multi-master-replication, no GFS involved)
- qdiskd is in place for two reasons:
   1) I need to run some heuristics
   2) to gather quorum if only one node starts up.
- quorum partition is on iSCSI SAN
- SAN storage is not required for the cluster services to operate at all 
(left aside it should work at node startup. But if the iscsi link goes 
down later on there is no need to actually fence a node as long as the 
network cluster communication between these two nodes is fine).

SAN firmware upgrades interrupt the iSCSI storage for about 40 seconds 
(multipathing et al is properly set up and working fine, SAN controller 
failover just takes that long). To mitigate that I need to set quite big 
totem consensus timeouts. Do not like that, but ok.

But the qdiskd keeps on fencing the nodes as soon as quorum par

Multicast address by CMAN

Parvez Shaikh — 2012-04-04T05:41:37

Hi all,

As per my understanding, CMAN uses cluster name to internally generate
multi-cast address. In my cluster.conf

Having a cluster with same name in a given network leads to issue and is
undesirable.

I want to know is there anyway to find if multicast address is already in
use by some other cluster, so as to avoid using name that generate same
multicast IP or for that matter configuring same multicast IP in
cluster.conf

Thanks,
Parvez

caching of san devices....

Alan Brown — 2012-04-03T13:14:09

Real Dumb Question[tm] time....

Has anyone tried putting bcache/flashcache in front of shared storage in 
a GFS2 cluster (on each node, of course)

Did it work?

Should it work?

Is it safe?

Are there ways of making it safe?

Am I mad for thinking about it?

Rationale:

Spinning disks are slow to seek, large arrays even more so.

As soon as there's a significant load on our GFS2 cluster the random io 
limitations of the SAN hardware become the single most important factor 
limiting performance.

Only "so much" ram can be installed in any hardware to increase page and 
dentry caching before physical limits are hit.

SSD SAN arrays are hideously expensive and can't always be justified to 
"the powers that be".

Universities are always tightly funded, but there are many other 
entities facing similar problems.

2 node cluster network query

jayesh.shinde — 2012-04-02T15:01:54

Hi all ,

I am using the 2 node cluster with drbd.

For sending the cluster packets & drbd packet I have connected the 3 
cross cable between 2 server.

The IP and config is as follows :--

      service                    mailbox1              mailbox2  
             Interface
---------------------------------------------------------------------------
1)  drbd res0                10.10.10.10/16     10.10.10.20/16       eth1
2)  drbd res1                10.10.10.30/16     10.10.10.40/16       eth2
3)  Cluster Packet        10.10.20.1/16       10.10.20.1/16         eth5


cat  /etc/hosts

10.10.20.1            mailbox1
10.10.20.2            mailbox2


################# part of cluster.conf  ########################
<clusternode name="mailbox1" nodeid="1" votes="1">
<multicast addr="224.0.0.1" interface="eth5"/>

<clusternode name="mailbox2" nodeid="2" votes="1">
<multicast addr="224.0.0.1" interface="eth5"/>
################# part of cluster.conf  ########################


Cluster log :--
----------------
Ap