openstack/ironic
Code Issues Proposed changes

Show transitions initiated by API requests

Browse Source 
This updates the state machine diagram and documentation to indicate
which transitions are initiated by API requests versus the ones that
are internally done by the conductor. Stable states are highlighted
a bit.

Change-Id: I1a2de81b14696286f1da47c06374ad235962c849
Closes-Bug: #1527316
This commit is contained in:
Ruby Loo 2015-12-17 16:25:56 +00:00
parent d489d28d87
commit 4f8b97dff6
3 changed files with 194 additions and 144 deletions
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8
doc/source/dev/states.rst
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@ -11,6 +11,12 @@ The diagram below shows the provisioning states that an Ironic node goes
through during the lifetime of a node. The diagram also depicts the events through during the lifetime of a node. The diagram also depicts the events
that transition the node to different states. that transition the node to different states.
Stable states are highlighted with a thicker border. All transitions from
stable states are initiated by API requests. There are a few other
API-initiated-transitions that are possible from non-stable states.
The events for these API-initiated transitions are indicated with '(via API)'.
Internally, the conductor initiates the other transitions (depicted in gray).
.. figure:: ../images/states.svg .. figure:: ../images/states.svg
:width: 660px :width: 660px
:align: left :align: left
@ -21,4 +27,4 @@ that transition the node to different states.
For more information about the states, see the specification located at For more information about the states, see the specification located at
`ironic-state-machine`_. `ironic-state-machine`_.
.. _ironic-state-machine: http://specs.openstack.org/openstack/ironic-specs/specs/kilo/new-ironic-state-machine.html .. _ironic-state-machine: http://specs.openstack.org/openstack/ironic-specs/specs/kilo-implemented/new-ironic-state-machine.html

278
doc/source/images/states.svg
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@ -4,295 +4,295 @@
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<!-- deploy failed&#45;&gt;deploying --> <!-- deploy failed&#45;&gt;deploying -->
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<!-- wait call&#45;back&#45;&gt;deploying --> <!-- wait call&#45;back&#45;&gt;deploying -->
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<!-- wait call&#45;back&#45;&gt;deploy failed --> <!-- wait call&#45;back&#45;&gt;deploy failed -->
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<!-- wait call&#45;back&#45;&gt;deleting --> <!-- wait call&#45;back&#45;&gt;deleting -->
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<!-- clean failed&#45;&gt;manageable --> <!-- clean failed&#45;&gt;manageable -->
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52
tools/states_to_dot.py
View File

@ -66,18 +66,62 @@ def main():
if options.filename is None: if options.filename is None:
options.filename = 'states.%s' % options.format options.filename = 'states.%s' % options.format
def node_attrs(state):
"""Attributes used for drawing the nodes (states).
The user can perform actions on stable states (and in a few other
cases), so we distinguish the stable states from the other states by
highlighting the node. Non-stable states are labelled with gray.
This is a callback method used by pydot.convert().
:param state: name of state
:returns: A dictionary with graphic attributes used for displaying
the state.
"""
attrs = map_color(state)
if source.is_stable(state):
attrs['penwidth'] = 1.7
else:
if 'fontcolor' not in attrs:
attrs['fontcolor'] = 'gray'
return attrs
def edge_attrs(start_state, event, end_state): def edge_attrs(start_state, event, end_state):
"""Attributes used for drawing the edges (transitions).
There are two types of transitions; the ones that the user can
initiate and the ones that are done internally by the conductor.
The user-initiated ones are shown with '(via API'); the others are
in gray.
This is a callback method used by pydot.convert().
:param start_state: name of the start state
:param event: the event, a string
:param end_state: name of the end state (unused)
:returns: A dictionary with graphic attributes used for displaying
the transition.
"""
if not options.labels:
return {}
translations = {'delete': 'deleted', 'deploy': 'active'}
attrs = {} attrs = {}
if options.labels: attrs['fontsize'] = 12
attrs['label'] = "on_%s" % event attrs['label'] = translations.get(event, event)
attrs.update(map_color(event)) if (source.is_stable(start_state) or 'fail' in start_state
or event in ('abort', 'delete')):
attrs['label'] += " (via API)"
else:
attrs['fontcolor'] = 'gray'
return attrs return attrs
source = states.machine source = states.machine
graph_name = '"Ironic states"' graph_name = '"Ironic states"'
graph_attrs = {'size': 0} graph_attrs = {'size': 0}
g = pydot.convert(source, graph_name, graph_attrs=graph_attrs, g = pydot.convert(source, graph_name, graph_attrs=graph_attrs,
node_attrs_cb=map_color, edge_attrs_cb=edge_attrs) node_attrs_cb=node_attrs, edge_attrs_cb=edge_attrs)
print_header(graph_name) print_header(graph_name)
print(g.to_string().strip()) print(g.to_string().strip())