openstack/openstack-manuals
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Merge "Corrected emergency recovery of ring builder files procedure"

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Jenkins 2014-11-18 12:22:02 +00:00 committed by Gerrit Code Review
commit 41a6eb31c3
1 changed files with 10 additions and 7 deletions
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17
doc/common/section_objectstorage-troubleshoot.xml
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@ -71,11 +71,12 @@
>>> partitions = len(ring._replica2part2dev_id[0])
>>> replicas = len(ring._replica2part2dev_id)
>>> builder = RingBuilder(int(Math.log(partitions, 2)), replicas, 1)
>>> builder = RingBuilder(int(math.log(partitions, 2)), replicas, 1)
>>> builder.devs = ring.devs
>>> builder._replica2part2dev = ring.replica2part2dev_id
>>> builder._replica2part2dev = ring._replica2part2dev_id
>>> builder._last_part_moves_epoch = 0
>>> builder._last_part_moves = array('B', (0 for _ in xrange(self.parts)))
>>> from array import array
>>> builder._last_part_moves = array('B', (0 for _ in xrange(partitions)))
>>> builder._set_parts_wanted()
>>> for d in builder._iter_devs():
d['parts'] = 0
@ -85,15 +86,17 @@
<para>This is the extent of the recoverable fields. For
<literal>min_part_hours</literal> you'll either have to remember what the
value you used was, or just make up a new one.</para>
<programlisting language="python">
<programlisting language="python">
>>> builder.change_min_part_hours(24) # or whatever you want it to be</programlisting>
<para>Try some validation: if this doesn't raise an exception, you may feel some
hope. Not too much, though.</para>
<para>Next, validate the builder. If this raises an exception, check
your previous code. When it validates, you're ready to save the
builder and create a new account.builder.</para>
<programlisting language="python">>>> builder.validate()</programlisting>
<para>Save the builder.</para>
<programlisting language="python">
>>> import pickle
>>> pickle.dump(builder.to_dict(), open('account.builder', 'wb'), protocol=2)</programlisting>
>>> pickle.dump(builder.to_dict(), open('account.builder', 'wb'), protocol=2)
>>> exit ()</programlisting>
<para>You should now have a file called 'account.builder' in the current working
directory. Next, run <literal>swift-ring-builder account.builder write_ring</literal>
and compare the new account.ring.gz to the account.ring.gz that you started