1FUNC-BUILD-MAP(1)               func-build-map               FUNC-BUILD-MAP(1)
2
3
4

NAME

6       func-build-map -- Builds/augments delegation map of all available func
7       minions
8

SYNOPSIS

10       func-build-map [-a|--append] [-o|--onlyalive] [-v|--verbose]
11

DESCRIPTION

13       Func's delegation feature allows an overlord to execute commands
14       through proxies (minions which also run as overlords) to reduce XMLRPC
15       overhead and the amount of time required to execute commands over large
16       Func networks.
17
18       To accomplish this task, Func needs to know where each proxy and minion
19       sits in the Func network, and for the sake of expediency, this data is
20       stored within a map file on the overlord.
21
22       func-build-map, when run on an overlord, recursively probes through
23       one's Func network, discovering its topology.  When complete, it stores
24       a mapfile, encoded in YAML, in /var/lib/func/map.
25
26       If you utilize delegation frequently, we recommend running this tool as
27       a cron job to ensure that your mapfile remains up to date with changes
28       in your Func network topology.
29

DELEGATION

31       Run without arguments, func-build-map will rewrite any mapfile
32       currently sitting in /var/lib/func.
33
34       To delegate commands, this mapfile must be created and kept updated. It
35       is hence recommended to run this as a daily cron job on the highest
36       overlord.
37
38       Note: Minions not yet in the map file will not be reached by delegation
39       calls.
40

-a, --append

42       Combines new Func network topology data with data from the old map
43       file, performing a tree merge.  If this merge fails, it replaces the
44       old mapfile with a fresh version.
45

-o, --onlyalive

47       Pings all minions and proxies and returns a map containing those which
48       return those pings.  Useful for Func network diagnostics and for those
49       who maintain networks where minions are frequently switched on and off.
50

-v, --verbose

52       Gives additional information as to what func-build-map is doing
53

DELEGATES

55       To get started with delegation via the Python API, try the following
56       code:
57
58         import func.overlord.client as fc
59         my_overlord = fc.Overlord("<your glob>", delegate=True)
60
61       If you want to use an alternative delegation map file, you can add the
62       argument mapfile=<your mapfile location> to the Overlord constructor to
63       tell it to pull the mapping data out of it instead.
64
65       From this point, you can treat your delegating overlord object in the
66       same manner as a non-delegating overlord. Minions that exist under
67       multiple layers of overlords will appear as if they existed directly
68       beneath your master overlord, so make some function calls and play
69       around with it!
70

ADDITIONAL RESOURCES

72       See https://fedorahosted.org/func/ for more information.
73
74       For feature-specific info, visit
75       https://fedorahosted.org/func/wiki/DelegationModule.
76

SEE ALSO

78       func-create-module(1), func-transmit(1), func-inventory(1), func(1),
79       funcd(1).
80

AUTHOR

82       Steve Salevan <ssalevan@redhat.com>, Nima Talebi <nima@it.net.au>
83
84
85
86                                  2009-07-08                 FUNC-BUILD-MAP(1)