24 lines
1.0 KiB
YAML
24 lines
1.0 KiB
YAML
---
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features:
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- |
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The ``ironic-conductor`` process now has a concept of an internal
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memory limit. The intent of this is to prevent the conductor from running
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the host out of memory when a large number of deployments have been
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requested.
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These settings can be tuned using
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``[DEFAULT]minimum_required_memory``,
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``[DEFAULT]mimimum_memory_wait_time``,
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``[DEFAULT]minimum_memory_wait_retries``, and
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``[DEFAULT]minimum_memory_warning_only``.
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Where possible, Ironic will attempt to wait out the time window, thus
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consuming the conductor worker thread which will resume if the memory
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becomes available. This will effectively rate limit concurrency.
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If raw image conversions with-in the conductor is required, and a
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situation exists where insufficient memory exists and it cannot be waited,
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the deployment operation will fail. For the ``iscsi`` deployment
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interface, which is the other location in ironic that may consume large
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amounts of memory, the conductor will wait until the next agent heartbeat.
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