The values and semantics of these flags should not be changed until the deprecated enum pe_ordering is dropped from the public API.
| Enumerator |
|---|
| pcmk__ar_none | No relation (compare with equality rather than bit set)
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| pcmk__ar_ordered | Actions are ordered (optionally, if no other flags are set)
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| pcmk__ar_if_first_unmigratable | Relation applies only if 'first' cannot be part of a live migration.
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| pcmk__ar_then_implies_first | If 'then' is required, 'first' becomes required (and becomes unmigratable if 'then' is); also, if 'first' is a stop of a blocked resource, 'then' becomes unrunnable
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| pcmk__ar_first_implies_then | If 'first' is required, 'then' becomes required; if 'first' is a stop of a blocked resource, 'then' becomes unrunnable
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| pcmk__ar_promoted_then_implies_first | If 'then' is required and for a promoted instance, 'first' becomes required (and becomes unmigratable if 'then' is)
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| pcmk__ar_unmigratable_then_blocks | 'first' is runnable only if 'then' is both runnable and migratable, and 'first' becomes required if 'then' is
|
| pcmk__ar_unrunnable_first_blocks | 'then' is runnable (and migratable) only if 'first' is runnable
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| pcmk__ar_first_else_then | If 'first' is unrunnable, 'then' becomes a real, unmigratable action.
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| pcmk__ar_first_implies_same_node_then | If 'first' is required, 'then' action for instance on same node is.
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| pcmk__ar_nested_remote_probe | Disable relation if 'first' is unrunnable and for an active resource, otherwise order actions and make 'then' unrunnable if 'first' is.
This is used to order a bundle replica's start of its container before a probe of its remote connection resource, in case the connection uses the REMOTE_CONTAINER_HACK to replace the connection address with where the container is running.
|
| pcmk__ar_intermediate_stop | If 'first' is for a blocked resource, make 'then' unrunnable.
If 'then' is required, make 'first' required, make 'first' unmigratable if 'then' is unmigratable, and make 'then' unrunnable if 'first' is unrunnable.
If 'then' is unrunnable and for the same resource as 'first', make 'first' required if it is runnable, and make 'first' unmigratable if 'then' is unmigratable.
This is used for "stop then start primitive" (restarts) and "stop group member then stop previous member".
|
| pcmk__ar_serialize | The actions must be serialized if in the same transition but can be in either order. (In practice, we always arrange them as 'first' then 'then', so they end up being essentially the same as optional orderings.)
Handle more intelligently – for example, we could schedule the action with the fewest inputs first, so we're more likely to execute at least one if there is a failure during the transition. Or, we could prefer certain action types over others, or base it on resource priority.
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| pcmk__ar_if_on_same_node | Relation applies only if actions are on same node.
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| pcmk__ar_then_implies_first_graphed | If 'then' is required, 'first' must be added to the transition graph.
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| pcmk__ar_first_implies_then_graphed | If 'first' is required and runnable, 'then' must be in graph.
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| pcmk__ar_asymmetric | User-configured asymmetric ordering.
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| pcmk__ar_if_on_same_node_or_target | Actions are ordered if on same node (or migration target for migrate_to)
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| pcmk__ar_min_runnable | 'then' action is runnable if certain number of 'first' instances are
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| pcmk__ar_if_required_on_same_node | Ordering applies only if 'first' is required and on same node as 'then'.
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| pcmk__ar_guest_allowed | Ordering applies even if 'first' runs on guest node created by 'then'.
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| pcmk__ar_then_cancels_first | If 'then' action becomes required, 'first' becomes optional.
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