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doc: update mon cluster rescue process for cuttlefish+

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Signed-off-by: Sage Weil <sage@inktank.com>
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Sage Weil 2013-05-21 14:45:29 -07:00
parent 132d5bf7f9
commit 5110497e31
1 changed files with 12 additions and 28 deletions
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doc/rados/operations/add-or-rm-mons.rst
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@ -159,49 +159,33 @@ This procedure removes a ``ceph-mon`` daemon from an unhealhty cluster--i.e.,
a cluster that has placement groups that are persistently not ``active + clean``.
#. Identify a surviving monitor. ::
#. Identify a surviving monitor and log in to that host. ::
ceph mon dump
#. Navigate to a surviving monitor's ``monmap`` directory. ::
ssh {mon-host}
cd /var/lib/ceph/mon/ceph-{mon-id}/monmap
#. List the directory contents and identify the last commmitted map.
Directory contents will show a numeric list of maps. ::
#. Stop the ``ceph-mon'' daemon and extract a copy of the monap file. ::
ls
1 2 3 4 5 first_committed last_committed last_pn latest
service ceph stop mon || stop ceph-mon-all
ceph-mon -i {mon-id} --extract-monmap {map-path}
# for example,
ceph-mon -i a --extract-monmap /tmp/monmap
#. Identify the most recently committed map. ::
sudo cat last_committed
#. Copy the most recently committed file to a temporary directory. ::
cp /var/lib/ceph/mon/ceph-{mon-id}/monmap/{last_committed} /tmp/surviving_map
#. Remove the non-surviving monitors. For example, if you have three monitors,
``mon.a``, ``mon.b``, and ``mon.c``, where only ``mon.a`` will survive, follow
the example below::
monmaptool /tmp/surviving_map --rm {mon-id}
#for example
monmaptool /tmp/surviving_map --rm b
monmaptool /tmp/surviving_map --rm c
#. Stop all monitors. ::
service ceph -a stop mon
monmaptool {map-path} --rm {mon-id}
# for example,
monmaptool /tmp/monmap --rm b
monmaptool /tmp/monmap --rm c
#. Inject the surviving map with the removed monitors into the surviving monitors.
For example, to inject a map into monitor ``mon.a``, follow the example below::
ceph-mon -i {mon-id} --inject-monmap {map-path}
#for example
ceph-mon -i a --inject-monmap /etc/surviving_map
# for example,
ceph-mon -i a --inject-monmap /tmp/monmap
.. _Changing a Monitor's IP address: