1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
.. index::
single: glossary
.. _glossary:
Glossary
--------
.. glossary::
assign
In the scheduler, this refers to associating a resource with a node. Do
not use *allocate* for this purpose.
bundle
The collective resource type associating instances of a container with
storage and networking. Do not use :term:`container` when referring to
the bundle as a whole.
cluster layer
The layer of the :term:`cluster stack` that provides membership and
messaging capabilities (such as Corosync).
cluster stack
The core components of a high-availability cluster: the
:term:`cluster layer` at the "bottom" of the stack, then Pacemaker, then
resource agents, and then the actual services managed by the cluster at
the "top" of the stack. Do not use *stack* for the cluster layer alone.
CPG
Corosync Process Group. This is the messaging layer in a Corosync-based
cluster. Pacemaker daemons use CPG to communicate with their counterparts
on other nodes.
container
This can mean either a container in the usual sense (whether as a
standalone resource or as part of a bundle), or as the container resource
meta-attribute (which does not necessarily reference a container in the
usual sense).
dangling migration
Live migration of a resource consists of a **migrate_to** action on the
source node, followed by a **migrate_from** on the target node, followed
by a **stop** on the source node. If the **migrate_to** and
**migrate_from** have completed successfully, but the **stop** has not
yet been done, the migration is considered to be *dangling*.
dependent
In colocation constraints, this refers to the resource located relative
to the :term:`primary` resource. Do not use *rh* or *right-hand* for this
purpose.
IPC
Inter-process communication. In Pacemaker, clients send requests to
daemons using libqb IPC.
message
This can refer to log messages, custom messages defined for a
**pcmk_output_t** object, or XML messages sent via :term:`CPG` or
:term:`IPC`.
metadata
In the context of options and resource agents, this refers to OCF-style
metadata. Do not use a hyphen except when referring to the OCF-defined
action name *meta-data*.
primary
In colocation constraints, this refers to the resource that the
:term:`dependent` resource is located relative to. Do not use *lh* or
*left-hand* for this purpose.
primitive
The fundamental resource type in Pacemaker. Do not use *native* for this
purpose.
score
An integer value constrained between **-PCMK_SCORE_INFINITY** and
**+PCMK_SCORE_INFINITY**. Certain strings (such as
**PCMK_VALUE_INFINITY**) parse as particular score values. Do not use
*weight* for this purpose.
self-fencing
When a node is chosen to execute its own fencing. Do not use *suicide*
for this purpose.
|
