Question

根据https://hub.docker.com/_/postgres的“初始化脚本”部分，我在docker-entrypoint-initdb.d中有两个文件：

init-db.sh
backup.dump

init-db.sh包含：

rank()

它似乎执行了，但是出现服务器连接错误，因为似乎服务器尚未开始监听端口5432，如以下日志文件所示。

我在做什么错？我基本上想在postgres docker容器初始化并开始运行后恢复数据库。

如果容器在运行，如果我在终端会话中手动运行init-db.sh脚本，它将完全按照我的需要创建数据库...

#!/bin/sh
pg_restore -h localhost -p 5432 -U postgres -d postgres -v "/docker-entrypoint-initdb.d/backup.dump"
exit

docker-compose.yml：

2019-10-23T17:09:43.032659100Z /usr/local/bin/docker-entrypoint.sh: ignoring /docker-entrypoint-initdb.d/backup.dump
2019-10-23T17:09:43.032699100Z
2019-10-23T17:09:43.032704200Z /usr/local/bin/docker-entrypoint.sh: running /docker-entrypoint-initdb.d/init-db.sh
2019-10-23T17:09:43.069092100Z pg_restore: connecting to database for restore
2019-10-23T17:09:43.069518400Z pg_restore: error: connection to database "postgres" failed: could not connect to server: Connection refused
2019-10-23T17:09:43.069534000Z  Is the server running on host "localhost" (127.0.0.1) and accepting
2019-10-23T17:09:43.069538000Z  TCP/IP connections on port 5432?
2019-10-23T17:09:43.069540800Z could not connect to server: Cannot assign requested address
2019-10-23T17:09:43.069543700Z  Is the server running on host "localhost" (::1) and accepting
2019-10-23T17:09:43.069546600Z  TCP/IP connections on port 5432?
2019-10-23T17:09:45.514371200Z 2019-10-23 17:09:45.514 UTC [1] LOG:  starting PostgreSQL 12.0 (Debian 12.0-2.pgdg100+1) on x86_64-pc-linux-gnu, compiled by gcc (Debian 8.3.0-6) 8.3.0, 64-bit
2019-10-23T17:09:45.514563000Z 2019-10-23 17:09:45.514 UTC [1] LOG:  listening on IPv4 address "0.0.0.0", port 5432
2019-10-23T17:09:45.514629800Z 2019-10-23 17:09:45.514 UTC [1] LOG:  listening on IPv6 address "::", port 5432
2019-10-23T17:09:45.522068300Z 2019-10-23 17:09:45.521 UTC [1] LOG:  listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
2019-10-23T17:09:45.547131800Z 2019-10-23 17:09:45.547 UTC [23] LOG:  database system was interrupted; last known up at 2019-10-23 17:09:42 UTC
2019-10-23T17:09:45.977904500Z 2019-10-23 17:09:45.977 UTC [23] LOG:  database system was not properly shut down; automatic recovery in progress
2019-10-23T17:09:45.980523000Z 2019-10-23 17:09:45.980 UTC [23] LOG:  invalid record length at 0/16453B0: wanted 24, got 0
2019-10-23T17:09:45.980590000Z 2019-10-23 17:09:45.980 UTC [23] LOG:  redo is not required
2019-10-23T17:09:45.994889300Z 2019-10-23 17:09:45.994 UTC [1] LOG:  database system is ready to accept connections

docker-compose.override.yml：

version: '3.4'

networks:
  dev01:
    driver: bridge

services:
  webapplication2:
    image: ${DOCKER_REGISTRY-}webapplication2
    depends_on:
      - "pgdev01"
    build:
      context: .
      dockerfile: WebApplication2/Dockerfile
    networks:
     - dev01
  pgdev01:
    image: postgres 
    restart: always 
    volumes:
      - db_volume:/var/lib/postgresql/data
      - ./dbscripts/:/docker-entrypoint-initdb.d/
    networks:
      - dev01
volumes:
  db_volume:

Answer 1

您遇到此问题的原因是您在init-db.sh文件中包含了docker-entrypoint.sh。如果删除它，一切都会正常。

之所以会这样，是因为postgres图像提供的默认localhost文件将是empty out listen_addresses during the initialization phase。因此，它不会监听{{1}}。

披露：我为Enterprisedb (EDB)工作

Answer 2

更改

pg_restore -h localhost -p 5432 -U postgres -d postgres -v "/docker-entrypoint-initdb.d/backup.dump"

到

pg_restore -U postgres -d postgres -v "/docker-entrypoint-initdb.d/backup.dump"

解决了这个问题。我不知道为什么...基于日志的疯狂猜测显示无法使用主机和端口连接到Postgres ...

为什么docker-entrypoint-initdb.d中的脚本在数据库开始侦听导致pg_restore失败的连接之前运行？

2 个答案: