关于python：当运行postgres作为Docker服务时，“psql：fe_sendauth：没有提供密码”


“psql: fe_sendauth: no password supplied” when running postgres as a Docker service

我正在尝试使用以下docker-compose.yml运行以下Docker Compose多容器应用程序：

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version: '3'

services:
  postgres:
    image: postgres
    environment:
      - POSTGRES_USER=iperuser
      - POSTGRES_PASSWORD=iperpassword
      - PGDATA=/var/lib/postgresql/data/apks
      - POSTGRES_DB=iper_apks

  alchemy:
    build: ./alchemy
    environment:
      - PGHOST=postgres
      - PGPORT=5432
      - PGUSER=iperuser
    links:
      - postgres

我希望alchemy服务等待postgres准备好使用https://docs.docker.com/compose/startup-order/上的wait-for-postgres.sh脚本接受命令：

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#!/bin/bash
# wait-for-postgres.sh
# From https://docs.docker.com/compose/startup-order/

set -e

host="$1"
shift
cmd="$@"

until psql -h"$host" -U"postgres" -c '\l'; do
  >&2 echo"Postgres is unavailable - sleeping"
  sleep 1
done

>&2 echo"Postgres is up - executing command"
exec $cmd

alchemy服务的Dockerfile是

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FROM python
RUN apt-get update && apt-get install --assume-yes postgresql
RUN pip install sqlalchemy psycopg2
COPY . /alchemy
WORKDIR alchemy
RUN chmod +x wait-for-postgres.sh
CMD ["./wait-for-postgres.sh","postgres","python","apk_tables.py"]

我正在使用主机名postgres，因为这是与postgres Docker镜像对应的服务的名称。 问题是，如果我docker-compose build后跟docker-compose up，我会得到以下日志：

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Starting apkapi_postgres_1
Recreating apkapi_alchemy_1
Attaching to apkapi_postgres_1, apkapi_alchemy_1
postgres_1  | LOG:  database system was shut down at 2017-06-26 17:22:32 UTC
alchemy_1   | Password for user postgres:
postgres_1  | LOG:  MultiXact member wraparound protections are now enabled
alchemy_1   | psql: fe_sendauth: no password supplied
postgres_1  | LOG:  database system is ready to accept connections
alchemy_1   | Postgres is unavailable - sleeping
postgres_1  | LOG:  autovacuum launcher started
alchemy_1   | Password for user postgres:
alchemy_1   | psql: fe_sendauth: no password supplied
alchemy_1   | Postgres is unavailable - sleeping
alchemy_1   | Password for user postgres:
alchemy_1   | psql: fe_sendauth: no password supplied
alchemy_1   | Postgres is unavailable - sleeping

永远持续下去。

我怀疑wait-for-postgres.sh假设PostgreSQL在本地主机上运行，这是受信任的，而在不同主机上运行的数据库需要密码。 是这样的吗？ 如果是这样，我如何修改脚本以使其使用密码(在这种情况下，我认为是iperpassword)？

看起来您只需将密码传递到psql命令，以便它能够显示远程主机所需的密码。 以下问题给出了实现该目的的选项：Postgresql：用密码编写psql执行脚本

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