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Exit if dockerized postgres is already running (#86)

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This creates the postgres container with a "postgres_<timestamp>" name.
This lets us check for an existing, running, postgres container and
exit early if it already exists. It's a little more clear/explicit than
the "port 5432 already in use" error message that results from rerunning
the script, and it addresses the gotcha in footnote 30
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dkulla01 2021-04-02 06:41:14 -04:00 committed by GitHub
parent 537f2e783e
commit ac90bcbb79
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9
scripts/init_db.sh
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@ -14,12 +14,21 @@ DB_PORT="${POSTGRES_PORT:=5432}"
# Allow to skip Docker if a dockerized Postgres database is already running # Allow to skip Docker if a dockerized Postgres database is already running
if [[ -z "${SKIP_DOCKER}" ]] if [[ -z "${SKIP_DOCKER}" ]]
then then
# if a postgres container is running, print instructions to kill it and exit
RUNNING_POSTGRES_CONTAINER=$(docker ps --filter 'name=postgres' --format '{{.ID}}')
if [[ -n $RUNNING_POSTGRES_CONTAINER ]]; then
echo >&2 "there is a postgres container already running, kill it with"
echo >&2 " docker kill ${RUNNING_POSTGRES_CONTAINER}"
exit 1
fi
# Launch postgres using Docker # Launch postgres using Docker
docker run \ docker run \
-e POSTGRES_USER=${DB_USER} \ -e POSTGRES_USER=${DB_USER} \
-e POSTGRES_PASSWORD=${DB_PASSWORD} \ -e POSTGRES_PASSWORD=${DB_PASSWORD} \
-e POSTGRES_DB=${DB_NAME} \ -e POSTGRES_DB=${DB_NAME} \
-p "${DB_PORT}":5432 \ -p "${DB_PORT}":5432 \
--name "postgres_$(date '+%s')" \
-d postgres \ -d postgres \
postgres -N 1000 postgres -N 1000
# ^ Increased maximum number of connections for testing purposes # ^ Increased maximum number of connections for testing purposes