Docker角色创建错误 - 角色___不存在

我是Docker的新手，我正试图用Postgres运行它 . 然后我尝试运行python测试用例，这些测试用例适用于其他人而不是我 .

以下错误告诉我Docker可能正在努力创建角色 foo ：

E sqlalchemy.exc.OperationalError：（psycopg2.OperationalError）致命：角色“foo”不存在

另一个错误：

E psycopg2.OperationalError：致命：角色“foo”不存在

Postgresql版本： mydb=# SELECT version(); ：

PostgreSQL 9.6.5 on x86_64-apple-darwin16.7.0, compiled by Apple LLVM version 8.1.0 (clang-802.0.42), 64-bit
(1 row)

Docker版本

Version 17.06.2-ce-mac27 (19124)

使用此脚本运行Docker：

docker run -p 5432:5432 --env POSTGRES_PASSWORD="bar" --env POSTGRES_USER="foo" --env POSTGRES_DB="mydb" postgres

脚本输出：如您所见，它表示 CREATE ROLE

The files belonging to this database system will be owned by user "postgres".
This user must also own the server process.

The database cluster will be initialized with locale "en_US.utf8".
The default database encoding has accordingly been set to "UTF8".
The default text search configuration will be set to "english".

Data page checksums are disabled.

fixing permissions on existing directory /var/lib/postgresql/data ... ok
creating subdirectories ... ok
selecting default max_connections ... 100
selecting default shared_buffers ... 128MB
selecting dynamic shared memory implementation ... posix
creating configuration files ... ok
running bootstrap script ... ok
performing post-bootstrap initialization ... ok
syncing data to disk ... ok

Success. You can now start the database server using:

    pg_ctl -D /var/lib/postgresql/data -l logfile start


WARNING: enabling "trust" authentication for local connections
You can change this by editing pg_hba.conf or using the option -A, or
--auth-local and --auth-host, the next time you run initdb.
waiting for server to start....LOG:  could not bind IPv6 socket: Cannot assign requested address
HINT:  Is another postmaster already running on port 5432? If not, wait a few seconds and retry.
LOG:  database system was shut down at 2017-09-26 21:28:17 UTC
LOG:  MultiXact member wraparound protections are now enabled
LOG:  database system is ready to accept connections
LOG:  autovacuum launcher started
 done
server started
CREATE DATABASE

CREATE ROLE


/usr/local/bin/docker-entrypoint.sh: ignoring /docker-entrypoint-initdb.d/*

LOG:  received fast shutdown request
LOG:  aborting any active transactions
LOG:  autovacuum launcher shutting down
waiting for server to shut down....LOG:  shutting down
LOG:  database system is shut down
 done
server stopped

PostgreSQL init process complete; ready for start up.

LOG:  database system was shut down at 2017-09-26 21:28:19 UTC
LOG:  MultiXact member wraparound protections are now enabled
LOG:  database system is ready to accept connections
LOG:  autovacuum launcher started

编辑

CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                     PORTS                    NAMES
bbab7eb98fcf        postgres            "docker-entrypoint..."   10 seconds ago      Up 11 seconds              0.0.0.0:5432->5432/tcp   hardcore_wilson
a6a1e2e313b8        postgres            "docker-entrypoint..."   16 minutes ago      Exited (0) 6 minutes ago                            nervous_banach