james pruett | 29 Mar 00:57 2015
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old page listing HA success-stories?

Hi,

I am looking for HA success stories written around year 2000.
Are those pages around anywhere ??
I sent in one and want to show it to some people in need of HA....

Thanks for any leads!

-Jim
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Uemit Arslan | 24 Mar 15:09 2015

/usr/sbin/stonith does not accept parameters as advertised ( carefully opened a bug 924010)


Hello colleagues, 

if some wants to test stonith and is unsure how to use parameters with stonith devices he checks which
parameters are available by doing: 

sles11ha2:~ # stonith -t external/libvirt   
usage: 
         stonith [-svh] -L 
         stonith [-svh] -t stonith-device-type -n 
         stonith [-svh] -t stonith-device-type -m 
         stonith [-svh] -t stonith-device-type {-p stonith-device-parameters | -F
stonith-device-parameters-file | -E | name=value...} [-c count] -lS 
         stonith [-svh] -t stonith-device-type {-p stonith-device-parameters | -F
stonith-device-parameters-file | -E | name=value...} [-c count] -T {reset|on|off} nodename 

stonith -t external/libvirt  -n 
hostlist  hypervisor_uri  reboot_method   

You would assume that you have to provide stonith params with "-p". 

I wanted  to test stonith mechanisms for qemu+libvirt and the stonith parameters with "-p".  

sles11ha2:~ # stonith -t external/libvirt -p "hostlist=sles11ha1:sles_hanode1
hypervisor_uri=qemu+tcp://147.2.90.22/system reset_method=power_cycle"  -T reset sles_hanode1 
external/libvirt[5462]: ERROR: Should never happen: Called for host sles_hanode1 but sles_hanode1 is
not in hostlist=sles11ha1:sles_hanode1. 
CRIT: external_reset_req: 'libvirt reset' for host sles_hanode1 failed with rc 1 

-->FAIL 
(Continue reading)

東一彦 | 25 Mar 01:49 2015
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Re: fence_ec2 agent

Hi Markus,

Thank you for the comment.

> Would it be possible, to implement this idea as an additional configuration method to the fence_ec2 agent?
I think that your idea is good.

So, I tries to implement it.
I'm going to change the fence_ec2(ec2) the following points.

  - the "tag" and the "port" options will be "not" required.

  - if the "port" option is not set, the 2nd argument of ec2 will use as the "port".
    - the 2nd argument of ec2 is "node to fence".

  - the "stat" and "status" action will be same the "monitor" action.
    (for do not use the "port" parameter in "stat" action.)

By the above modifications, If it is described uname in the Name tag,
the setting of the "tag" and "port" parameters are no longer necessary.

----
primitive prmStonith1-2 stonith:external/ec2 \
         params \
                 pcmk_off_timeout="120s" \
         op start interval="0s" timeout="60s" \
         op monitor interval="3600s" timeout="60s" \
         op stop interval="0s" timeout="60s"
----

(Continue reading)

Salim | 10 Mar 10:33 2015

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(Continue reading)

Willi Fehler | 6 Mar 09:12 2015
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CentOS 7 Pacemake/Corosync

Hi,

I'm trying to build a Pacemaker/Corosync Cluster on CentOS7. The default 
Corosync configuration with one ring is working but then I only have 1 
ring and no encryption.

RING ID 1
     id    = 10.10.10.1
     status    = ring 1 active with no faults

I've tried to activate the following configuration but it doesn't work.

[root <at> linsrv006 corosync]# cat /etc/corosync/corosync.conf
totem {
         version: 2
         secauth: on
         threads: 0
         rrp_mode: active
         interface {
                 ringnumber: 0
                 bindnetaddr: 192.168.0.0
                 mcastaddr: 226.94.42.7
                 mcastport: 5411
         }
         interface {
                 ringnumber: 1
                 bindnetaddr: 10.10.10.0
                 mcastaddr: 226.94.42.11
                 mcastport: 5419
         }
(Continue reading)

Lars Ellenberg | 27 Feb 16:52 2015

Please subscribe to users <at> clusterlabs.org. This Mailing List is considered deprecated.

One of the things that was agreed at the recent cluster summit was a
consolidation cluster related irc channels, mailing lists, and websites.

In keeping with this, the linux-ha mailing list should now be considered
deprecated.

We still want to hear your questions (and answers!), but you'll need to
subscribe to the 'users' list at:

  http://oss.clusterlabs.org/mailman/listinfo/users

The mailing list itself will automatically remind posters of this
(at most) once a week.

Apologies for the inconvenience.

	Lars Ellenberg

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jarek | 26 Feb 09:36 2015
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Automatic Postgres recovery

Hello!

I've replicated postgresql cluster with pacemaker and corosync.

Testing instance of this cluster works on virtual machines, and
sometimes after host restart, postgres remains unsychronized and I need
to manually setup slave database with pg_basebacup. Fortunately such
problem never happen to production cluster, but I can imagine, that in
case of power failure similar scenario can happen to it also.

Is there any way to configure it, so in case of serious slave failure,
it will automatically perform recovery process with pg_basebackup ?
best regards
Jarek

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Maily Peng | 25 Feb 11:47 2015

conditionnal start a resource


Hello,

I'd like to start a Dummy resource  only if a file exists , if not, the 
resource could not start.

Thank you .
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Markus Guertler | 24 Feb 23:22 2015

fence_ec2 agent

Dear list,
I was just trying to configure the fence_ec2 stonith agent from 2012, written by Andrew Beekhof. It looks
like, that this one not working anymore with newer stonith / cluster versions. Is there any other EC2
agent, that is still maintained?

If not, I'll write one myself. However, I'd like to check all options first.

Cheers,
Markus 

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Barry Haycock | 16 Feb 12:48 2015
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Maintaining TCP State and configuring Conntrackd


I am building a corosync/pacemaker/haproxy HA load balancer in Active/Active mode using ClusterIP. As
this built on RHEL 6.5 I am restricted to using PCS to configure the LB.

One of the requirements is to maintain TCP state so that TCP based syslog audit is not lost during a fail over. 

I have two questions: 

1) is it possible when using conntrackd to maintain TCP state to have a seamless transition to the remaining
LB should one of the servers be shutdown. The work group in question cannot afford to loose any messages
once the connection has commenced. Some machines will be using a reliable transmission method for syslog
such as RELP but others will be using raw TCP. 

My testing shows that when sending a large of raw TCP messages via a single connection, the syslog server
will loose messages when one of the LBs are shutdown or put into standby. The client machine will start
ARPing for the mac address assigned to the VIP till a connection is established with the remaining LB. This
can loose us up to 3 seconds worth of messages. In reality I don't expect such a large amount of traffic to be
generated via a single connection. But the work group will not accept the solution if we loose any
messages. 

Will this be a matter of managing the expectations of the work group, that during fail over, messages in
transit will be lost when using raw TCP?

2) I have been looking for instructions to implement conntrackd as a resource using PCS in order to maintain
TCP state and haven't had any luck. All instructions I have found implement conntrackd using cman. 
If anyone has an example for implementing conntrackd via pcs it would be much appreciated.

--

-- 

Barry
(Continue reading)

Vladislav Bogdanov | 13 Feb 15:03 2015

crmsh fails to stop already stopped resource

Hi,

Following fails with the current crmsh (e4b10ee).
# crm resource stop cl-http-lv
# crm resource stop cl-http-lv
ERROR: crm_diff apparently failed to produce the diff (rc=0)
ERROR: Failed to commit updates to cl-http-lv
# echo $?
1

Best,
Vladislav
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Gmane