ad9e9ca3f7
Fixes LP Bug#874580 - keyerror 'location' when fetch errors
Fixes LP Bug#817570 - Make new image cache a true extension
Fixes LP Bug#872372 - Image cache has virtually no unit test coverage
* Adds unit tests for the image cache (coverage goes from 26% to 100%)
* Removes caching logic from the images controller and places it into
a removeable transparent caching middleware
* Adds a functional test case that verifies caching of an image
and subsequent cache hits
* Removes the image_cache_enabled configuration variable, since it's
now enabled by simply including the cache in the application
pipeline
* Adds a singular glance-cache.conf to etc/ that replaces the
multiple glance-pruner.conf, glance-reaper.conf and
glance-prefetcher.conf files
* Adds documentation on enabling and configuring the image cache
TODO: Add documentation on the image cache utilities, like reaper,
prefetcher, etc.
Change-Id: I58845871deee26f81ffabe1750adc472ce5b3797
57 lines
1.8 KiB
Plaintext
57 lines
1.8 KiB
Plaintext
[DEFAULT]
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# Show more verbose log output (sets INFO log level output)
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verbose = True
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# Show debugging output in logs (sets DEBUG log level output)
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debug = False
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log_file = /var/log/glance/image-cache.log
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# Send logs to syslog (/dev/log) instead of to file specified by `log_file`
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use_syslog = False
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# Directory that the Image Cache writes data to
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image_cache_datadir = /var/lib/glance/image-cache/
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# Number of seconds after which we should consider an incomplete image to be
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# stalled and eligible for reaping
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image_cache_stall_timeout = 86400
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# image_cache_invalid_entry_grace_period - seconds
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#
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# If an exception is raised as we're writing to the cache, the cache-entry is
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# deemed invalid and moved to <image_cache_datadir>/invalid so that it can be
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# inspected for debugging purposes.
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#
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# This is number of seconds to leave these invalid images around before they
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# are elibible to be reaped.
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image_cache_invalid_entry_grace_period = 3600
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image_cache_max_size_bytes = 1073741824
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# Percentage of the cache that should be freed (in addition to the overage)
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# when the cache is pruned
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#
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# A percentage of 0% means we prune only as many files as needed to remain
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# under the cache's max_size. This is space efficient but will lead to
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# constant pruning as the size bounces just-above and just-below the max_size.
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#
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# To mitigate this 'thrashing', you can specify an additional amount of the
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# cache that should be tossed out on each prune.
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image_cache_percent_extra_to_free = 0.20
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# Address to find the registry server
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registry_host = 0.0.0.0
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# Port the registry server is listening on
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registry_port = 9191
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[app:glance-pruner]
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paste.app_factory = glance.image_cache.pruner:app_factory
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[app:glance-prefetcher]
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paste.app_factory = glance.image_cache.prefetcher:app_factory
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[app:glance-reaper]
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paste.app_factory = glance.image_cache.reaper:app_factory
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