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ecc070e974
- Attempt to add graceful reconfiguration for SRV based connections. On connection failure, the pool will be closed and reopened after fetching to get new SRV records. - When using SRV, use all return hosts in the PostgreSQL URL - If multiple requests hit a disconnect error, the reconnect logic will allow the first one in to reconnect and the others to wait
36 lines
2.8 KiB
ReStructuredText
36 lines
2.8 KiB
ReStructuredText
Configuration
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=============
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:py:mod:`sprockets-postgres <sprockets_postgres>` is configured via environment variables. The following table
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details the configuration options and their defaults.
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+---------------------------------+--------------------------------------------------+-----------+
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| Variable | Definition | Default |
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+=================================+==================================================+===========+
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| ``POSTGRES_URL`` | The PostgreSQL URL to connect to | |
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+---------------------------------+--------------------------------------------------+-----------+
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| ``POSTGRES_MAX_POOL_SIZE`` | Maximum connection count to Postgres per backend | ``10`` |
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+---------------------------------+--------------------------------------------------+-----------+
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| ``POSTGRES_MIN_POOL_SIZE`` | Minimum or starting pool size. | ``1`` |
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+---------------------------------+--------------------------------------------------+-----------+
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| ``POSTGRES_CONNECTION_TIMEOUT`` | The maximum time in seconds to spend attempting | ``10`` |
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| | to create a new connection. | |
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+---------------------------------+--------------------------------------------------+-----------+
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| ``POSTGRES_CONNECTION_TTL`` | Time-to-life in seconds for a pooled connection. | ``300`` |
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+---------------------------------+--------------------------------------------------+-----------+
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| ``POSTGRES_QUERY_TIMEOUT`` | Maximum execution time for a query in seconds. | ``60`` |
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+---------------------------------+--------------------------------------------------+-----------+
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| ``POSTGRES_HSTORE`` | Enable HSTORE support in the client. | ``FALSE`` |
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+---------------------------------+--------------------------------------------------+-----------+
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| ``POSTGRES_JSON`` | Enable JSON support in the client. | ``FALSE`` |
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+---------------------------------+--------------------------------------------------+-----------+
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| ``POSTGRES_UUID`` | Enable UUID support in the client. | ``TRUE`` |
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+---------------------------------+--------------------------------------------------+-----------+
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If ``POSTGRES_URL`` uses a scheme of ``postgresql+srv``, a SRV DNS lookup will be
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performed and the URL will be constructed containing all host and port combinations
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in priority and weighted order, utilizing `libpq's supoprt <https://www.postgresql.org/docs/12/libpq-connect.html>`_
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for multiple hosts in a URL.
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AWS's ECS service discovery does not follow the SRV standard, but creates SRV
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records. If ``POSTGRES_URL`` uses a scheme of ``aws+srv``, a SRV DNS lookup will be
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performed using the correct format for ECS service discovery.
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