mirror of
https://github.com/docker-library/postgres.git
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c86568af4a
This mimics the behavior of `docker-entrypoint.sh` before it starts the PostgreSQL server.
It has three main goals/uses:
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)
72 lines
2.2 KiB
Bash
Executable File
72 lines
2.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -Eeuo pipefail
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#
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# This script is intended for three main use cases:
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#
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# 1. (most importantly) as an example of how to use "docker-entrypoint.sh" to extend/reuse the initialization behavior
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#
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# 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
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# (no-op if database is already initialized)
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#
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# 3. ("docker-enforce-initdb.sh") as part of CI to ensure the database is fully initialized before use
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# (error if database is already initialized)
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#
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source /usr/local/bin/docker-entrypoint.sh
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# 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)
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if [ "$#" -eq 0 ] || [ "$1" != 'postgres' ]; then
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set -- postgres "$@"
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fi
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# see also "_main" in "docker-entrypoint.sh"
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docker_setup_env
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# setup data directories and permissions (when run as root)
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docker_create_db_directories
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if [ "$(id -u)" = '0' ]; then
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# then restart script as postgres user
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exec gosu postgres "$BASH_SOURCE" "$@"
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fi
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# only run initialization on an empty data directory
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if [ -z "$DATABASE_ALREADY_EXISTS" ]; then
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docker_verify_minimum_env
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# check dir permissions to reduce likelihood of half-initialized database
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ls /docker-entrypoint-initdb.d/ > /dev/null
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docker_init_database_dir
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pg_setup_hba_conf "$@"
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# PGPASSWORD is required for psql when authentication is required for 'local' connections via pg_hba.conf and is otherwise harmless
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# e.g. when '--auth=md5' or '--auth-local=md5' is used in POSTGRES_INITDB_ARGS
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export PGPASSWORD="${PGPASSWORD:-$POSTGRES_PASSWORD}"
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docker_temp_server_start "$@"
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docker_setup_db
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docker_process_init_files /docker-entrypoint-initdb.d/*
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docker_temp_server_stop
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unset PGPASSWORD
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else
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self="$(basename "$0")"
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case "$self" in
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docker-ensure-initdb.sh)
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echo >&2 "$self: note: database already initialized in '$PGDATA'!"
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exit 0
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;;
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docker-enforce-initdb.sh)
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echo >&2 "$self: error: (unexpected) database found in '$PGDATA'!"
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exit 1
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;;
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*)
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echo >&2 "$self: error: unknown file name: $self"
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exit 99
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;;
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esac
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fi
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