[Linux-cluster] cluster name length bug

[Patrick Caulfield]

German Staltari wrote:
> 
> Hi, while I was trying to setup a new cluster I've found a bug in the
> valid name length of a cluster.
> The MAX_CLUSTER_NAME_LEN is 16, but if I put a cluster name of 16 chars
> when a node tries to connect to the cluster the node is refused to
> connect  and in 'dmesg' you can see this:
> CMAN: attempt to join with cluster name 'qmail-be-cluster' refused
> CMAN: attempt to join with cluster name 'qmail-be-cluster' refused
> CMAN: attempt to join with cluster name 'qmail-be-cluster' refused
> CMAN: attempt to join with cluster name 'qmail-be-cluster' refused
> Searching through the code I found that It was here where the problem
> exists:
> -----------------------------------------------------------------------------
> 
>                /* Check the cluster name matches */
>                if (strcmp(cluster_name, joinmsg->clustername)) {
>                        printk(KERN_WARNING CMAN_NAME
>                               ": attempt to join with cluster name '%s'
> refused\n",
>                               joinmsg->clustername);
>                        return -1;
>                }
> ----------------------------------------------------------------------------
> 
> 
> The name of the cluster was the same in all nodes: qmail-be-cluster.
> It's easy to reproduce the problem. Just create a cluster with a name of
> 16 chars and then It's impossible to connect to the cluster.
> 
> This is my conf file in all nodes:
> 
> <?xml version="1.0"?>
> <cluster config_version="13" name="qmail-be-cluster">
>        <fence_daemon clean_start="1" post_fail_delay="0"
> post_join_delay="3"/>
>        <clusternodes>
>                <clusternode name="qmail-be-01" votes="1">
>                        <fence>
>                                <method name="1">
>                                        <device name="manopla"
> nodename="qmail-be-01"/>
>                                </method>
>                        </fence>
>                </clusternode>
>                <clusternode name="qmail-be-04" votes="1">
>                        <fence>
>                                <method name="1">
>                                        <device name="manopla"
> nodename="qmail-be-04"/>
>                                </method>
>                        </fence>
>                </clusternode>
>                <clusternode name="qmail-be-05" votes="1">
>                        <fence>
>                                <method name="1">
>                                        <device name="manopla"
> nodename="qmail-be-05"/>
>                                </method>
>                        </fence>
>                </clusternode>
>        </clusternodes>
>        <cman/>
>        <fencedevices>
>                <fencedevice agent="fence_manual" name="manopla"/>
>        </fencedevices>
>        <rm>
>                <failoverdomains/>
>                <resources/>
>        </rm>
> </cluster>
> 
> 
> I'm using Fedora Core 4 with this rpm's :
> 
> kernel-smp-2.6.14-1.1653_FC4
> GFS-6.1.0-3
> GFS-kernel-smp-2.6.11.8-20050601.152643.FC4.20
> cman-kernel-smp-2.6.11.5-20050601.152643.FC4.18
> cman-1.0.0-1
> ccs-1.0.0-1
> dlm-kernel-smp-2.6.11.5-20050601.152643.FC4.17
> dlm-1.0.0-3
> fence-1.32.1-1
> rgmanager-1.9.34-5
> lvm2-2.01.08-2.1
> lvm2-cluster-2.01.09-3.0
> 
> We need to put this on bugzilla, but I don't know how to do it. :(
> 


we know. It's "fixed" in later packages - the name is restricted to 15 chars !
-- 

patrick