-You can set the following environment variables when launching a container to change the A1 behavior:
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-1. ``A1_RMR_RETRY_TIMES``: the number of times failed rmr operations such as timeouts and send failures should be retried before A1 gives up and returns a 503. The default is ``4``.
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-2. ``INSTANCE_DELETE_NO_RESP_TTL``: Please refer to the delete flowchart in docs/; this is ``T1`` there. The default is 5 (seconds). Basically, the number of seconds that a1 waits to remove an instance from the database after a delete is called in the case that no downstream apps responded.
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-3. ``INSTANCE_DELETE_RESP_TTL``: Please refer to the delete flowchart in docs/; this is ``T2`` there. The default is 5 (seconds). Basically, the number of seconds that a1 waits to remove an instance from the database after a delete is called in the case that downstream apps responded.
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-4. ``USE_FAKE_SDL``: This allows testing of the A1 feature without a DBaaS SDL container. The default is False.
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-5. ``prometheus_multiproc_dir``: The directory where Prometheus gathers metrics. The default is /tmp.
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