[sheepdog-users] Several difficulties with sheepdog (from 0.4.0-0+tek2b-10 deb package)
icez at icez.net
Thu Jul 26 16:39:26 CEST 2012
sheepdog v0.4.0 change the storage backend from 'simple' to 'farm' so that
you required some manual task from 'good practices' (especially converting
the storage backend from simple to farm).
On Thu, Jul 26, 2012 at 9:27 PM, Bastian Scholz <nimrodxx at gmx.de> wrote:
> Sorry, if the mail arrives two times, used the wrong sender
> Hi David,
> at the moment I shut down the complete cluster before
> updating it (collie cluster shutdown)
> But I had some complete data losses too with the actual
> debian package. At the moment I try to understand, why
> this happens...
> Am 2012-07-26 15:54, schrieb David Douard:
>> I'm trying the latest deb package made by Jens, and I encounter
>> problems: I cannot make the cluster accept IO.
>> My main problem is that I find it very easy to loose my cluster; almost
>> every time I try to shutdown the cluster, it ends with a situation where
>> the cluster is corrupted (with "Failed to read object 805a6c0500000000
>> No object found" kind of messages).
>> I lost the data when I upgraded the deb packages for example, as I use
>> in this context a cssh session, so all nodes are upgraded at the same
>> time, and the upgrade provoque a restart of the sheepdog service.
>> Is this behavior somewhat expected, since I do not follow some kind of
>> "good practices"? What are theses good practices? Is sheepdog
>> "compatible" with sysadmin automating tools like puppet or salt (that do
>> propagate changes to several nodes at a time)? How can I configure
>> something like automatic shutdown on power outage (I'm using apcupsd)?
>> How do I restart my cluster after a shutdown? Can I just fire a "service
>> sheepdog start" in a cssh session?
>> I guess these questions are also somewhat related to the discussion
>> about the possibility to sheepdog to detect that a node is down for a
>> short while, and not really failed, etc.
>> So, how do you guys manage your sheepdog clusters so you don't loose
>> your data?
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