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Re: [Linux-cluster] Linux-cluster Digest, Vol 75, Issue 21



 You are right. I was not having multicast group in third node when I
did netstat -gn, have added below config in cluster.conf and restarted
cluster and now I have multicast group on all nodes. Problem is packets
are being received at public network of third node unlike other two
nodes where they are being received at private network IP. Any inputs
how to change that?

Added to cluster.conf

<multicast addr="239.192.104.2"/>
                <cman/>

>From third node.

[root usrylxap235 ~]# ip addr list|grep eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
qlen 1000
    inet 192.168.0.7/24 brd 192.168.0.255 scope global eth0
[root usrylxap235 ~]# ip addr list|grep eth5
7: eth5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
qlen 1000
    inet 54.3.254.235/24 brd 54.3.254.255 scope global eth5

[root usrylxap235 ~]# tcpdump -i eth0 icmp
tcpdump: verbose output suppressed, use -v or -vv for full protocol
decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes

0 packets captured
1 packets received by filter
0 packets dropped by kernel

[root usrylxap235 ~]# tcpdump -i eth5 icmp
tcpdump: verbose output suppressed, use -v or -vv for full protocol
decode
listening on eth5, link-type EN10MB (Ethernet), capture size 96 bytes
17:48:19.292089 IP usrylxap237.merck.com > 239.192.104.2: ICMP echo
request, id 26924, seq 23, length 64
22 packets captured
22 packets received by filter
0 packets dropped by kernel

Appreciate your help.

Anoop

-----Original Message-----
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Sent: Tuesday, July 20, 2010 12:00 PM
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Subject: Linux-cluster Digest, Vol 75, Issue 21

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   1. Re: Linux-cluster Digest, Vol 75, Issue 19 (Dan Frincu)


----------------------------------------------------------------------

Message: 1
Date: Tue, 20 Jul 2010 11:57:13 +0300
From: Dan Frincu <dfrincu streamwide ro>
To: linux clustering <linux-cluster redhat com>
Subject: Re: [Linux-cluster] Linux-cluster Digest, Vol 75, Issue 19
Message-ID: <4C4564E9 1010404 streamwide ro>
Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"


Rajkumar, Anoop wrote:
>  
> Hi
>
> Cluster is using private subnet address as node name and cman shows
> following information on thir node.
>
> [root usrylxap235 ~]# cman_tool status
> Version: 6.1.0
> Config Version: 44
> Cluster Name: cluster1
> Cluster Id: 26777
> Cluster Member: Yes
> Cluster Generation: 88
> Membership state: Cluster-Member
> Nodes: 1
> Expected votes: 3
> Total votes: 1
> Quorum: 2 Activity blocked
> Active subsystems: 5
> Flags:
> Ports Bound: 0
> Node name: usrylxap235-1.merck.com
> Node ID: 3
> Multicast addresses: 239.192.104.2
> Node addresses: 192.168.0.7
>
> Two active nodes have following info.
>
> [root usrylxap237 net]# cman_tool status
> Version: 6.1.0
> Config Version: 44
> Cluster Name: cluster1
> Cluster Id: 26777
> Cluster Member: Yes
> Cluster Generation: 296
> Membership state: Cluster-Member
> Nodes: 2
> Expected votes: 3
> Total votes: 2
> Quorum: 2
> Active subsystems: 8
> Flags: Dirty
> Ports Bound: 0 177
> Node name: usrylxap237-1.merck.com
> Node ID: 1
> Multicast addresses: 239.192.104.2
> Node addresses: 192.168.0.2
>
> All the nodes have private network connected to foundry switch. How I
> make sure that multicast traffic is going through private network
which
> is eth5 for third node, eth0 for first and second node?
>   
netstat -gn shows multicast groups and the interfaces they're linked to.
Ping the multicast address from one node and run "tcpdump -ni ethx icmp"

on the other node to see if multicast traffic is reaching the node. Then

repeat the process in the other direction.

Must have icmp traffic allowed between nodes first. If you don't want to

test icmp and only want to test TCP/UDP, use netcat.

Regards,
Dan.
> Thanks
> Anoop 
> -----Original Message-----
> From: linux-cluster-bounces redhat com
> [mailto:linux-cluster-bounces redhat com] On Behalf Of
> linux-cluster-request redhat com
> Sent: Sunday, July 18, 2010 12:00 PM
> To: linux-cluster redhat com
> Subject: Linux-cluster Digest, Vol 75, Issue 19
>
> Send Linux-cluster mailing list submissions to
> 	linux-cluster redhat com
>
> To subscribe or unsubscribe via the World Wide Web, visit
> 	https://www.redhat.com/mailman/listinfo/linux-cluster
> or, via email, send a message with subject or body 'help' to
> 	linux-cluster-request redhat com
>
> You can reach the person managing the list at
> 	linux-cluster-owner redhat com
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Linux-cluster digest..."
>
>
> Today's Topics:
>
>    1. Re: Adding third node to existing cluster (Marti, Robert)
>    2. Re: How do i stop VM's on a failed node? (Volker Dormeyer)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 17 Jul 2010 22:10:52 -0500
> From: "Marti, Robert" <RJM002 shsu edu>
> To: linux clustering <linux-cluster redhat com>
> Subject: Re: [Linux-cluster] Adding third node to existing cluster
> Message-ID:
> 	<8FAC1E47484E43469AA28DBF35C955E4BDE0B47EAC EXMBX SHSU EDU>
> Content-Type: text/plain; charset="us-ascii"
>
>
>   
>> On Fri, Jul 16, 2010 at 2:06 AM, Rajkumar, Anoop
>>     
> <anoop_rajkumar merck com> wrote:
>   
>> Hi
>>
>> Here are the firewall settings
>>
>> #more /etc/sysconfig/iptables
>> # Generated by iptables-save v1.3.5 on Wed Jul 14 10:13:12 2010
>> *filter
>> :INPUT ACCEPT [2:186]
>> :FORWARD ACCEPT [0:0]
>> :OUTPUT ACCEPT [4:486]
>> -A INPUT -i eth5 -p udp -m udp --dport 5405 -j ACCEPT
>> -A INPUT -i eth5 -p udp -m udp --sport 5405 -j ACCEPT
>> -A INPUT -i eth0 -p tcp -m tcp --dport 14567 -j ACCEPT
>> -A INPUT -i eth0 -p tcp -m tcp --sport 14567 -j ACCEPT
>> -A INPUT -i eth0 -p tcp -m tcp --dport 16851 -j ACCEPT
>> -A INPUT -i eth0 -p tcp -m tcp --sport 16851 -j ACCEPT
>> -A INPUT -i eth5 -p udp -m udp --dport 50007 -j ACCEPT
>> -A INPUT -i eth5 -p udp -m udp --sport 50007 -j ACCEPT
>> -A INPUT -i eth5 -p tcp -m tcp --dport 11111 -j ACCEPT
>> -A INPUT -i eth5 -p tcp -m tcp --sport 11111 -j ACCEPT
>> -A INPUT -i eth5 -p tcp -m tcp --dport 21064 -j ACCEPT
>> -A INPUT -i eth5 -p tcp -m tcp --sport 21064 -j ACCEPT
>> -A INPUT -i eth5 -p tcp -m tcp --dport 50009 -j ACCEPT
>> -A INPUT -i eth5 -p tcp -m tcp --sport 50009 -j ACCEPT
>> -A INPUT -i eth5 -p tcp -m tcp --dport 50008 -j ACCEPT
>> -A INPUT -i eth5 -p tcp -m tcp --sport 50008 -j ACCEPT
>> -A INPUT -i eth5 -p tcp -m tcp --dport 50006 -j ACCEPT
>> -A INPUT -i eth5 -p tcp -m tcp --sport 50006 -j ACCEPT
>> -A INPUT -i eth5 -p tcp -m tcp --dport 41969 -j ACCEPT
>> -A INPUT -i eth5 -p tcp -m tcp --sport 41969 -j ACCEPT
>> -A INPUT -i eth5 -p tcp -m tcp --dport 41968 -j ACCEPT
>> -A INPUT -i eth5 -p tcp -m tcp --sport 41968 -j ACCEPT
>> -A INPUT -i eth5 -p tcp -m tcp --dport 41967 -j ACCEPT
>> -A INPUT -i eth5 -p tcp -m tcp --sport 41967 -j ACCEPT
>> -A INPUT -i eth5 -p tcp -m tcp --dport 41966 -j ACCEPT
>> -A INPUT -i eth5 -p tcp -m tcp --sport 41966 -j ACCEPT
>> -A OUTPUT -o eth5 -p udp -m udp --sport 5405 -j ACCEPT
>> -A OUTPUT -o eth5 -p udp -m udp --dport 5405 -j ACCEPT
>> -A OUTPUT -o eth0 -p tcp -m tcp --sport 14567 -j ACCEPT
>> -A OUTPUT -o eth0 -p tcp -m tcp --dport 14567 -j ACCEPT
>> -A OUTPUT -o eth0 -p tcp -m tcp --sport 16851 -j ACCEPT
>> -A OUTPUT -o eth0 -p tcp -m tcp --dport 16851 -j ACCEPT
>> -A OUTPUT -o eth5 -p udp -m udp --sport 50007 -j ACCEPT
>> -A OUTPUT -o eth5 -p udp -m udp --dport 50007 -j ACCEPT
>> -A OUTPUT -o eth5 -p tcp -m tcp --sport 11111 -j ACCEPT
>> -A OUTPUT -o eth5 -p tcp -m tcp --dport 11111 -j ACCEPT
>> -A OUTPUT -o eth5 -p tcp -m tcp --sport 21064 -j ACCEPT
>> -A OUTPUT -o eth5 -p tcp -m tcp --dport 21064 -j ACCEPT
>> -A OUTPUT -o eth5 -p tcp -m tcp --sport 50009 -j ACCEPT
>> -A OUTPUT -o eth5 -p tcp -m tcp --dport 50009 -j ACCEPT
>> -A OUTPUT -o eth5 -p tcp -m tcp --sport 50008 -j ACCEPT
>> -A OUTPUT -o eth5 -p tcp -m tcp --dport 50008 -j ACCEPT
>> -A OUTPUT -o eth5 -p tcp -m tcp --sport 50006 -j ACCEPT
>> -A OUTPUT -o eth5 -p tcp -m tcp --dport 50006 -j ACCEPT
>> -A OUTPUT -o eth5 -p tcp -m tcp --sport 41969 -j ACCEPT
>> -A OUTPUT -o eth5 -p tcp -m tcp --dport 41969 -j ACCEPT
>> -A OUTPUT -o eth5 -p tcp -m tcp --sport 41968 -j ACCEPT
>> -A OUTPUT -o eth5 -p tcp -m tcp --dport 41968 -j ACCEPT
>> -A OUTPUT -o eth5 -p tcp -m tcp --sport 41967 -j ACCEPT
>> -A OUTPUT -o eth5 -p tcp -m tcp --dport 41967 -j ACCEPT
>> -A OUTPUT -o eth5 -p tcp -m tcp --sport 41966 -j ACCEPT
>> -A OUTPUT -o eth5 -p tcp -m tcp --dport 41966 -j ACCEPT
>> COMMIT
>>
>> Here are the IP in the system,I am using eth5 (Which is in private
>>     
> network
>   
>> with other two nodes, connected to switch)
>>
>> [root usrylxap235 ~]# ip addr list
>> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
>>     link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
>>     inet 127.0.0.1/8 scope host lo
>>     inet6 ::1/128 scope host
>>        valid_lft forever preferred_lft forever
>> 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
>>     
> qlen
>   
>> 1000
>>     link/ether 00:1c:c4:f0:bd:d8 brd ff:ff:ff:ff:ff:ff
>>     inet 54.3.254.235/24 brd 54.3.254.255 scope global eth0
>>     inet6 fe80::21c:c4ff:fef0:bdd8/64 scope link
>>        valid_lft forever preferred_lft forever
>> 3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000
>>     link/ether 00:1c:c4:f0:bd:da brd ff:ff:ff:ff:ff:ff
>> 4: eth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000
>>     link/ether 00:1c:c4:5e:f8:d8 brd ff:ff:ff:ff:ff:ff
>> 5: eth3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000
>>     link/ether 00:1c:c4:5e:f8:da brd ff:ff:ff:ff:ff:ff
>> 6: eth4: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000
>>     link/ether 00:1e:0b:71:ac:6c brd ff:ff:ff:ff:ff:ff
>> 7: eth5: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast
>>     
> qlen
>   
>> 1000
>>     link/ether 00:1e:0b:71:ac:6e brd ff:ff:ff:ff:ff:ff
>>     inet 192.168.0.7/24 brd 192.168.0.255 scope global eth5
>>     inet6 fe80::21e:bff:fe71:ac6e/64 scope link
>>        valid_lft forever preferred_lft forever
>> 8: sit0: <NOARP> mtu 1480 qdisc noop
>>     link/sit 0.0.0.0 brd 0.0.0.0
>>
>> Thanks
>> Anoop
>>     
>
> Hi,
>
> Let's see if we can rule out security or network issues here. Are you
> able to allow all traffic for eth5 on all nodes? In addition, you may
> want to add a static multicast route to ensure the multicast traffic
> is going through eth5 on all nodes.
>
> Regards,
> Bernard
>
>
-----------------------------------------------------------------------
>
> He's essentially running a wide open firewall with those rules.
Default
> ACCEPT on all chains, and no DROPs or REJECTs.  It's not a firewall
> issue.  It may be multicast not going out the right interface,
however.
>
>
>
> ------------------------------
>
> Message: 2
> Date: Sun, 18 Jul 2010 11:28:53 +0200
> From: Volker Dormeyer <volker ixolution de>
> To: linux clustering <linux-cluster redhat com>
> Subject: Re: [Linux-cluster] How do i stop VM's on a failed node?
> Message-ID: <20100718092853 GA4159 dijkstra>
> Content-Type: text/plain; charset=us-ascii
>
> Hi,
>
> On Fri, Jul 16, 2010 at 01:21:57PM -0400,
> Nathan Lager <lagern lafayette edu> wrote:
>   
>> I have a 4-node cluster, running KVM, and a host of VM's.
>>
>> One of the nodes failed unexpectedly.  I'm having two issues.  First,
>> the VM's which were on that node are still reported as up and running
>>     
> on
>   
>> that node in clustat, and second, i'm unable to interact with the
>> cluster using clusvcadm.  Every command hangs.  I've tried disabling
>> these VM's, and the commands hang.
>>
>> How can i clear out this dead node, without having to forceably
>>     
> restart
>   
>> my entire cluster?
>>     
>
> To me, it sounds like fencing is not configured, properly.
>
> What has been logged on the remaining nodes? I would assume, they
tried
> to
> fence the failed node - but are not able to.
>
> Log-Snippets and Config would be helpful.
>
> Regards,
> Volker
>
>
>
> ------------------------------
>
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-- 
Dan FRINCU
Systems Engineer
CCNA, RHCE
Streamwide Romania

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