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rhel5 - lucci - cluster - problem

Hi everybody,

I am working on a Linux cluster. I am a beginner and can't jump over one thing.

I am using rh5 with ricci and lucci. Have two nodes and I try to configure a cluster. I have the following error trying to create a cluster on a node:

******
Unable to add the key for node 172.21.35.101 to the trusted key list.
Unable to connect to 172.21.35.101: Error setting up SSL connection to 172.21.35.101
******

The other server's IP is 172.21.35.100. I have two network cards in each one. they are joined with cross-over and thru the network.

If anybody could help I would appreciate it much.
Thanks
Mirek

You need to configure SSL on your webserver to configure the cluser with lucci. However I would recommend to edit /etc/cluster/cluster.conf manually (system-config-cluster may be used to get a sample clustger.conf). You will certainly learn a lot more and it is easier to get help on the net as you are able to describe your configuration steps with more detail.

Thank you for your reply !

I was using system-config-cluster before, but problem was similar it said "the other" node is not a part of the cluster or something similar.
I would appreciate a step by step advice or simple files or whatever please.

thank you
Mirek

Quote:

Originally Posted by brianmcgee (Post 3010151)

Each node needs an entry in /etc/hosts. The hostname must be identical to the nodename in /etc/cluster.conf.

Code:

172.16.40.50  node01

172.16.40.51  node02

You need to create the /etc/yum.repos.d/csgfs.repo file:

Code:

[csgfs]

name=CentOS-5 - CSGFS

baseurl=http://mirror.centos.org/centos/$releasever/csgfs/$basearch/

gpgcheck=1

enabled=1

The following packages need to be installed on all nodes:

Code:

# yum install cman gfs-utils kmod-gfs lvm2-cluster

lvm2 clustering needs to be enabled

Code:

lvmconf --enable-cluster

For a beginning, the following /etc/cluster.conf may be used:

Code:

<?xml version="1.0"?>

<cluster config_version="1" name="atixcluster">

        <cman expected_votes="1" two_node="1"/>

        <fence_daemon clean_start="1" post_fail_delay="0" post_join_delay="3"/>

        <clusternodes>

                <clusternode name="node01" votes="1" nodeid="1">

                        <fence>

                                <method name="1">

                                </method>

                        </fence>

                </clusternode>

        <clusternode name="node02" votes="1" nodeid="2">

                        <fence>

                                <method name="1">

                                </method>

                        </fence>

                </clusternode>

        </clusternodes>

  <cman/>

  <fencedevices/>

  <rm>

          <failoverdomains/>

          <resources/>

  </rm>

</cluster>

Please note that you must configure a valid fencing method for productive use. The default method "Fence manual" is only suitable for first tests.

Also be aware that this is a special two node configuration.

It is better to include a third node or a quorum device to get another vote and to further avoid any split brain issues.

Now you may start your cluster:

Code:

# /etc/init.d/ccsd start

# /etc/init.d/cman start

# /etc/init.d/fenced start

Now you may create your first GFS volume:

Code:

# pvcreate /dev/sdx

# vgcreate vg_gfs /dev/sdx

# lvcreate lvcreate -l $(vgdisplay vg_gfs | grep "Total PE" | cut -d " " -f18-) -n lv_gfs vg_gfs

# gfs_mkfs -j 3 -t atixcluster:lv_gfs -p lock_dlm /dev/vg_gfs/lv_gfs

Have fun...

Thanks Brian,

I'll work on that ASAP and let you know how it looks like. Just one question: I am using RedHat5 and you suggest to enter CentOS line in /etc/yum.repos.d/csgfs.repo file, ist that correct ?

Mirek

If you use RHEL 5 you need an active subscription to Red Hat Network with the additional GFS and Cluster Suite channels registered for your machine.