[kwlug-disc] High Availability

[Joe Wennechuk]

So I was thinking there would be a command that I could issue to fallback

or some script that would handle the failback The master node is back up, but the service is still pointing to the slave.

----------------------------------------
> CC: kwlug-disc at kwlug.org
> From: jpoole at digitaljedi.ca
> Date: Thu, 20 Feb 2014 16:07:02 -0500
> To: kwlug-disc at kwlug.org
> Subject: Re: [kwlug-disc] High Availability
>
> From what I remember with heartbeat setups (a long long time ago) it was always a manual failback as to control split brain possibilities.
>
> Sent from my iPhone
>
>> On Feb 20, 2014, at 3:17 PM, Digimer <lists at alteeve.ca> wrote:
>>
>> Ok, so I asked on IRC for you. The person I was thinking of is only familiar with heartbeat v3. He thinks though that older heartbeat doesn't have a "fail-back" mode, it only moves in response to a node failure/withdraw.
>>
>> Of course, neither of us are sure on this.
>>
>> digimer
>>
>>> On 20/02/14 12:02 PM, Digimer wrote:
>>> I'm afraid that I last used heartbeat in 2007 or 2008. It's long
>>> deprecated and the use base is shrinking fast.
>>>
>>> I would suggest you jump on freenode.net, join #linux-ha and ask for
>>> help there. Also, you could try #drbd as LinBit, the company behind
>>> DRBD, maintains the heartbeat code base. There is one user there I know
>>> who is still familiar with heartbeat who might be able to help.
>>>
>>> In the meantime, I _strongly_ recommend starting the process of
>>> migrating the client to corosync + pacemaker. That's the new stack that
>>> everything is moving towards (even Red Hat is going there in RHEL 7 and
>>> dropping their own cman + rgmanager).
>>>
>>> digimer
>>>
>>>> On 20/02/14 11:15 AM, Joe Wennechuk wrote:
>>>> Ha resources on the slave is ..
>>>> OSCAR-SLAVE 10.240.7.190 tomcat6 smartlabs inadyn
>>>> MailTo::support at prylynx.com
>>>>
>>>> and on the master is ...
>>>> OSCAR-MASTER 10.240.7.190 tomcat6 smartlabs inadyn
>>>> MailTo::support at prylynx.com
>>>>
>>>>
>>>> ----------------------------------------
>>>>> From: youcanreachmehere at hotmail.com
>>>>> To: kwlug-disc at kwlug.org
>>>>> Subject: RE: [kwlug-disc] High Availability
>>>>> Date: Thu, 20 Feb 2014 11:11:57 -0500
>>>>>
>>>>> I have just acquired an already set up customer. It appears that it
>>>>> is using heartbeat.
>>>>>
>>>>> haresources on both machines is ....
>>>>> OSCAR-MASTER 10.240.7.190 tomcat6 smartlabs inadyn
>>>>> MailTo::support at prylynx.com
>>>>>
>>>>> and the ha.cf is ....
>>>>> logfile /var/log/ha-log
>>>>> logfacility local0
>>>>> keepalive 2
>>>>> udpport 694
>>>>> bcast eth0 # Linux
>>>>> auto_failback off
>>>>> node OSCAR-MASTER
>>>>> node OSCAR-SLAVE
>>>>>
>>>>> OSCAR-MASTER IP is 10.240.7.191
>>>>> OSCAR-SLAVE IP is 10.240.7.192
>>>>>
>>>>> The slave has the ball because if I ifconfig on the slave I get the
>>>>> following that shows the slave is now IT.
>>>>>
>>>>> eth0 Link encap:Ethernet HWaddr 10:9a:dd:5b:a3:81
>>>>> inet addr:10.240.7.192 Bcast:10.240.7.255 Mask:255.255.255.0
>>>>> inet6 addr: fe80::129a:ddff:fe5b:a381/64 Scope:Link
>>>>> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
>>>>> RX packets:25668625 errors:0 dropped:0 overruns:0 frame:0
>>>>> TX packets:24503891 errors:0 dropped:0 overruns:0 carrier:0
>>>>> collisions:0 txqueuelen:1000
>>>>> RX bytes:865187034 (865.1 MB) TX bytes:1338963431 (1.3 GB)
>>>>> Interrupt:21
>>>>>
>>>>> eth0:0 Link encap:Ethernet HWaddr 10:9a:dd:5b:a3:81
>>>>> inet addr:10.240.7.190 Bcast:10.240.7.255 Mask:255.255.255.0
>>>>> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
>>>>> Interrupt:21
>>>>>
>>>>>
>>>>>
>>>>> ----------------------------------------
>>>>>> Date: Thu, 20 Feb 2014 10:50:11 -0500
>>>>>> From: lists at alteeve.ca
>>>>>> To: kwlug-disc at kwlug.org
>>>>>> Subject: Re: [kwlug-disc] High Availability
>>>>>>
>>>>>>> On 20/02/14 10:32 AM, Joe Wennechuk wrote:
>>>>>>> I have a High Availability cluster, and the slave has taken over.
>>>>>>> The master is back up, but failback is not on. Is there any command
>>>>>>> to force the failback to the master?
>>>>>>
>>>>>> What cluster stack? How is it configured? What is the current reported
>>>>>> state?
>>>>>>
>>>>>> --
>>>>>> Digimer
>>>>>> Papers and Projects: https://alteeve.ca/w/
>>>>>> What if the cure for cancer is trapped in the mind of a person without
>>>>>> access to education?
>>>>>>
>>>>>>
>>>>>> _______________________________________________
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>>
>> --
>> Digimer
>> Papers and Projects: https://alteeve.ca/w/
>> What if the cure for cancer is trapped in the mind of a person without access to education?
>>
>>
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