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Merge PR #20688 into wip-sage-testing-20180306.131906
* refs/pull/20688/head: doc: Drop the output of pg query doc: Update Monitoring OSDs and PGs Reviewed-by: Lenz Grimmer <lgrimmer@suse.com> Reviewed-by: Sage Weil <sage@redhat.com>
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@ -51,3 +51,4 @@ jtlayton Jeff Layton <jlayton@redhat.com>
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yuriw Yuri Weinstein <yweins@redhat.com>
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jecluis João Eduardo Luís <joao@suse.de>
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yunfeiguan Yunfei Guan <yunfei.guan@xtaotech.com>
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LenzGr Lenz Grimmer <lgrimmer@suse.com>
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@ -66,10 +66,10 @@ running, too. To see if all OSDs are running, execute::
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ceph osd stat
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The result should tell you the map epoch (eNNNN), the total number of OSDs (x),
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how many are ``up`` (y) and how many are ``in`` (z). ::
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The result should tell you the total number of OSDs (x),
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how many are ``up`` (y), how many are ``in`` (z) and the map epoch (eNNNN). ::
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eNNNN: x osds: y up, z in
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x osds: y up, z in; epoch: eNNNN
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If the number of OSDs that are ``in`` the cluster is more than the number of
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OSDs that are ``up``, execute the following command to identify the ``ceph-osd``
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@ -79,14 +79,12 @@ daemons that are not running::
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::
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dumped osdmap tree epoch 1
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# id weight type name up/down reweight
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-1 2 pool openstack
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-3 2 rack dell-2950-rack-A
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-2 2 host dell-2950-A1
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0 1 osd.0 up 1
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1 1 osd.1 down 1
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#ID CLASS WEIGHT TYPE NAME STATUS REWEIGHT PRI-AFF
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-1 2.00000 pool openstack
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-3 2.00000 rack dell-2950-rack-A
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-2 2.00000 host dell-2950-A1
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0 ssd 1.00000 osd.0 up 1.00000 1.00000
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1 ssd 1.00000 osd.1 down 1.00000 1.00000
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.. tip:: The ability to search through a well-designed CRUSH hierarchy may help
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you troubleshoot your cluster by identifying the physcial locations faster.
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@ -142,7 +140,7 @@ The result should tell you the osdmap epoch (eNNN), the placement group number
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({pg-num}), the OSDs in the Up Set (up[]), and the OSDs in the acting set
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(acting[]). ::
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osdmap eNNN pg {pg-num} -> up [0,1,2] acting [0,1,2]
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osdmap eNNN pg {raw-pg-num} ({pg-num}) -> up [0,1,2] acting [0,1,2]
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.. note:: If the Up Set and Acting Set do not match, this may be an indicator
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that the cluster rebalancing itself or of a potential problem with
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@ -207,16 +205,16 @@ placement groups, execute::
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ceph pg stat
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The result should tell you the placement group map version (vNNNNNN), the total
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number of placement groups (x), and how many placement groups are in a
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particular state such as ``active+clean`` (y). ::
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The result should tell you the total number of placement groups (x), how many
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placement groups are in a particular state such as ``active+clean`` (y) and the
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amount of data stored (z). ::
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vNNNNNN: x pgs: y active+clean; z bytes data, aa MB used, bb GB / cc GB avail
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x pgs: y active+clean; z bytes data, aa MB used, bb GB / cc GB avail
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.. note:: It is common for Ceph to report multiple states for placement groups.
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In addition to the placement group states, Ceph will also echo back the amount
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of data used (aa), the amount of storage capacity remaining (bb), and the total
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In addition to the placement group states, Ceph will also echo back the amount of
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storage capacity used (aa), the amount of storage capacity remaining (bb), and the total
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storage capacity for the placement group. These numbers can be important in a
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few cases:
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@ -255,113 +253,7 @@ To query a particular placement group, execute the following::
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Ceph will output the query in JSON format.
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.. code-block:: javascript
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{
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"state": "active+clean",
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"up": [
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1,
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0
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],
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"acting": [
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1,
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0
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],
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"info": {
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"pgid": "1.e",
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"last_update": "4'1",
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"last_complete": "4'1",
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"log_tail": "0'0",
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"last_backfill": "MAX",
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"purged_snaps": "[]",
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"history": {
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"epoch_created": 1,
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"last_epoch_started": 537,
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"last_epoch_clean": 537,
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"last_epoch_split": 534,
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"same_up_since": 536,
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"same_interval_since": 536,
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"same_primary_since": 536,
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"last_scrub": "4'1",
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"last_scrub_stamp": "2013-01-25 10:12:23.828174"
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},
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"stats": {
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"version": "4'1",
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"reported": "536'782",
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"state": "active+clean",
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"last_fresh": "2013-01-25 10:12:23.828271",
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"last_change": "2013-01-25 10:12:23.828271",
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"last_active": "2013-01-25 10:12:23.828271",
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"last_clean": "2013-01-25 10:12:23.828271",
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"last_unstale": "2013-01-25 10:12:23.828271",
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"mapping_epoch": 535,
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"log_start": "0'0",
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"ondisk_log_start": "0'0",
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"created": 1,
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"last_epoch_clean": 1,
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"parent": "0.0",
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"parent_split_bits": 0,
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"last_scrub": "4'1",
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"last_scrub_stamp": "2013-01-25 10:12:23.828174",
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"log_size": 128,
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"ondisk_log_size": 128,
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"stat_sum": {
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"num_bytes": 205,
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"num_objects": 1,
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"num_object_clones": 0,
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"num_object_copies": 0,
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"num_objects_missing_on_primary": 0,
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"num_objects_degraded": 0,
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"num_objects_unfound": 0,
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"num_read": 1,
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"num_read_kb": 0,
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"num_write": 3,
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"num_write_kb": 1
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},
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"stat_cat_sum": {
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},
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"up": [
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1,
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0
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],
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"acting": [
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1,
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0
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]
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},
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"empty": 0,
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"dne": 0,
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"incomplete": 0
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},
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"recovery_state": [
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{
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"name": "Started\/Primary\/Active",
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"enter_time": "2013-01-23 09:35:37.594691",
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"might_have_unfound": [
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],
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"scrub": {
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"scrub_epoch_start": "536",
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"scrub_active": 0,
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"scrub_block_writes": 0,
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"finalizing_scrub": 0,
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"scrub_waiting_on": 0,
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"scrub_waiting_on_whom": [
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]
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}
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},
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{
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"name": "Started",
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"enter_time": "2013-01-23 09:35:31.581160"
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}
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]
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}
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The following subsections describe common states in greater detail.
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The following subsections describe the common pg states in detail.
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Creating
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--------
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@ -571,7 +463,7 @@ calculates how to map the object to a `placement group`_, and then calculates
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how to assign the placement group to an OSD dynamically. To find the object
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location, all you need is the object name and the pool name. For example::
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ceph osd map {poolname} {object-name}
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ceph osd map {poolname} {object-name} [namespace]
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.. topic:: Exercise: Locate an Object
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@ -593,7 +485,7 @@ location, all you need is the object name and the pool name. For example::
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Ceph should output the object's location. For example::
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osdmap e537 pool 'data' (0) object 'test-object-1' -> pg 0.d1743484 (0.4) -> up [1,0] acting [1,0]
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osdmap e537 pool 'data' (0) object 'test-object-1' -> pg 0.d1743484 (0.4) -> up ([1,0], p0) acting ([1,0], p0)
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To remove the test object, simply delete it using the ``rados rm`` command.
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For example::
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