1MONMAPTOOL(8)                        Ceph                        MONMAPTOOL(8)
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NAME

6       monmaptool - ceph monitor cluster map manipulation tool
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SYNOPSIS

9       monmaptool <action> [options] mapfilename
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DESCRIPTION

13       monmaptool  is  a utility to create, view, and modify a monitor cluster
14       map for the Ceph distributed storage system. The monitor map  specifies
15       the  only  fixed  addresses  in the Ceph distributed system.  All other
16       daemons bind to arbitrary addresses and register  themselves  with  the
17       monitors.
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19       When creating a map with --create, a new monitor map with a new, random
20       UUID will be created. It should be followed by one or more monitor  ad‐
21       dresses.
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23       The  default  Ceph  monitor port for messenger protocol v1 is 6789, and
24       3300 for protocol v2.
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26       Multiple actions can be performed per invocation.
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OPTIONS

29       --print
30              print a plaintext dump of the map, after any  modifications  are
31              made.
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33       --feature-list [plain|parseable]
34              list the enabled features as well as the available ones.
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36              By default, a human readable output is produced.
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38       --create
39              create  a  new  monitor map with a new UUID (and with it, a new,
40              empty Ceph cluster).
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42       --clobber
43              allow monmaptool to create a new mapfilename in place of an  ex‐
44              isting map.
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46              Only useful when --create is used.
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48       --generate
49              generate a new monmap based on the values on the command line or
50              specified in the ceph configuration.  This is, in order of pref‐
51              erence,
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53                 1. --monmap filename to specify a monmap to load
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55                 2. --mon-host  'host1,ip2'  to  specify a list of hosts or ip
56                    addresses
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58                 3. [mon.foo] sections containing mon  addr  settings  in  the
59                    config.  Note that this method is not recommended and sup‐
60                    port will be removed in a future release.
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62       --filter-initial-members
63              filter the initial monmap by applying the  mon  initial  members
64              setting.  Monitors not present in that list will be removed, and
65              initial members not present in the map will be added with  dummy
66              addresses.
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68       --add name ip[:port]
69              add a monitor with the specified ip:port to the map.
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71              If the nautilus feature is set, and the port is not, the monitor
72              will be added for both messenger protocols.
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74       --addv name [protocol:ip:port[,...]]
75              add a monitor with the specified version:ip:port to the map.
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77       --rm name
78              remove the monitor with the specified name from the map.
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80       --fsid uuid
81              set the fsid to the given uuid.  If not specified with --create,
82              a random fsid will be generated.
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84       --feature-set value [--optional|--persistent]
85              enable a feature.
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87       --feature-unset value [--optional|--persistent]
88              disable a feature.
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90       --enable-all-features
91              enable all supported features.
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93       --set-min-mon-release release
94              set the min_mon_release.
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EXAMPLE

97       To create a new map with three monitors (for a fresh Ceph cluster):
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99          monmaptool --create --add nodeA 192.168.0.10 --add nodeB 192.168.0.11 \
100            --add nodeC 192.168.0.12 --enable-all-features --clobber monmap
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102       To display the contents of the map:
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104          monmaptool --print monmap
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106       To replace one monitor:
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108          monmaptool --rm nodeA monmap
109          monmaptool --add nodeA 192.168.0.9 monmap
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AVAILABILITY

112       monmaptool is part of Ceph, a massively scalable, open-source, distrib‐
113       uted  storage  system.  Please  refer  to  the  Ceph  documentation  at
114       http://ceph.com/docs for more information.
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SEE ALSO

117       ceph(8), crushtool(8),
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120       2010-2021,  Inktank Storage, Inc. and contributors. Licensed under Cre‐
121       ative Commons Attribution Share Alike 3.0 (CC-BY-SA-3.0)
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126dev                              Sep 28, 2021                    MONMAPTOOL(8)
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