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Copy pathdocker-ensure-initdb.sh
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executable file
·72 lines (59 loc) · 2.26 KB
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#!/usr/bin/env bash
set -Eeuo pipefail
#
# This script is intended for three main use cases:
#
# 1. (most importantly) as an example of how to use "docker-entrypoint.sh" to extend/reuse the initialization behavior
#
# 2. ("docker-ensure-initdb.sh") as a Kubernetes "init container" to ensure the provided database directory is initialized; see also "startup probes" for an alternative solution
# (no-op if database is already initialized)
#
# 3. ("docker-enforce-initdb.sh") as part of CI to ensure the database is fully initialized before use
# (error if database is already initialized)
#
source /usr/local/bin/docker-entrypoint.sh
# arguments to this script are assumed to be arguments to the "postgres" server (same as "docker-entrypoint.sh"), and most "docker-entrypoint.sh" functions assume "postgres" is the first argument (see "_main" over there)
if [ "$#" -eq 0 ] || [ "$1" != 'postgres' ]; then
set -- postgres "$@"
fi
# see also "_main" in "docker-entrypoint.sh"
docker_setup_env
# setup data directories and permissions (when run as root)
docker_create_db_directories
if [ "$(id -u)" = '0' ]; then
# then restart script as postgres user
exec gosu postgres "$BASH_SOURCE" "$@"
fi
# only run initialization on an empty data directory
if [ -z "$DATABASE_ALREADY_EXISTS" ]; then
docker_verify_minimum_env
docker_error_old_databases
# check dir permissions to reduce likelihood of half-initialized database
ls /docker-entrypoint-initdb.d/ > /dev/null
docker_init_database_dir
pg_setup_hba_conf "$@"
# PGPASSWORD is required for psql when authentication is required for 'local' connections via pg_hba.conf and is otherwise harmless
# e.g. when '--auth=md5' or '--auth-local=md5' is used in POSTGRES_INITDB_ARGS
export PGPASSWORD="${PGPASSWORD:-$POSTGRES_PASSWORD}"
docker_temp_server_start "$@"
docker_setup_db
docker_process_init_files /docker-entrypoint-initdb.d/*
docker_temp_server_stop
unset PGPASSWORD
else
self="$(basename "$0")"
case "$self" in
docker-ensure-initdb.sh)
echo >&2 "$self: note: database already initialized in '$PGDATA'!"
exit 0
;;
docker-enforce-initdb.sh)
echo >&2 "$self: error: (unexpected) database found in '$PGDATA'!"
exit 1
;;
*)
echo >&2 "$self: error: unknown file name: $self"
exit 99
;;
esac
fi