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introduce PGBOUNCER_CONNECT_QUERY parameter to configure connect_query setting #95

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introduce PGBOUNCER_CONNECT_QUERY parameter to configure connect_query setting #95

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bb2d672
introduce PGBOUNCER_CONNECT_QUERY parameter to configure connect_quer…
Jan 29, 2018
23d19e4
document PGBOUNCER_CONNECT_QUERY in README
Jan 29, 2018
9ee3ed7
escape single quotes in connect_query
Jan 29, 2018
028672b
handle empty connect_query more gracefully
Feb 1, 2018
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1 change: 1 addition & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -146,5 +146,6 @@ and [stunnel](http://linux.die.net/man/8/stunnel) configurations to see what set
- `ENABLE_STUNNEL_AMAZON_RDS_FIX` Default is unset. Set this var if you are connecting to an Amazon RDS instance of postgres.
Adds `options = NO_TICKET` which is documented to make stunnel work correctly after a dyno resumes from sleep. Otherwise, the dyno will lose connectivity to RDS.
- `PGBOUNCER_IGNORE_STARTUP_PARAMETERS` Adds parameters to ignore when pgbouncer is starting. Some postgres libraries, like Go's pq, append this parameter, making it impossible to use this buildpack. Default is empty and the most common ignored parameter is `extra_float_digits`. Multiple parameters can be seperated via commas. Example: `PGBOUNCER_IGNORE_STARTUP_PARAMETERS="extra_float_digits, some_other_param"`
- `PGBOUNCER_CONNECT_QUERY` The query to be executed on newly created connections. This is useful for setting things like `statement_timeout`. e.g. `PGBOUNCER_CONNECT_QUERY="set statement_timeout to 10000"`

For more info, see [CONTRIBUTING.md](CONTRIBUTING.md)
7 changes: 6 additions & 1 deletion bin/gen-pgbouncer-conf.sh
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Expand Up @@ -92,8 +92,13 @@ EOFEOF
"$DB_USER" "$DB_MD5_PASS"
EOFEOF

CONNECT_QUERY_PARAM=''
if [[ "$PGBOUNCER_CONNECT_QUERY" ]]; then
CONNECT_QUERY_PARAM="connect_query='${PGBOUNCER_CONNECT_QUERY//\'/\'\'}'"
fi

cat >> /app/vendor/pgbouncer/pgbouncer.ini << EOFEOF
$CLIENT_DB_NAME= dbname=$DB_NAME port=610${n}
$CLIENT_DB_NAME= dbname=$DB_NAME port=610${n} $CONNECT_QUERY_PARAM
EOFEOF

let "n += 1"
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