Answer a question

I am using postgresql with django in my project. I've got them in different containers and the problem is that i need to wait for postgres before running django. At this time i am doing it with sleep 5 in command.sh file for django container. I also found that netcat can do the trick but I would prefer way without additional packages. curl and wget can't do this because they do not support postgres protocol. Is there a way to do it?

Answers

Problem with your solution tiziano is that curl is not installed by default and i wanted to avoid installing additional stuff. Anyway i did what bereal said. Here is the script if anyone would need it.

import socket
import time
import os

port = int(os.environ["DB_PORT"]) # 5432

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
while True:
    try:
        s.connect(('myproject-db', port))
        s.close()
        break
    except socket.error as ex:
        time.sleep(0.1)
# postgresql # docker
Logo
PostgreSQL

PostgreSQL社区为您提供最前沿的新闻资讯和知识内容

更多推荐

PostgreSQL 计数查询效率,物化视图 [重复]

问题:PostgreSQL 计数查询效率,物化视图 [重复] 可能重复: PostgreSQL 计数查询优化 使用 PostgreSQL 9.2,我们试图弄清楚是否有一种方法可以跟踪查询的结果数量,并以有效的方式返回该数字。这个查询应该每秒执行几次(可能几十到几百甚至几千次)。我们现在的查询看起来像这样,但我们想知道这是否效率低下: -- Get # of rows that do not hav

avatar PostgreSQL

多对多中的唯一性

问题:多对多中的唯一性 我无法弄清楚谷歌的哪些术语,所以帮助标记这个问题或只是以相关问题的方式向我指出会有所帮助。 我相信我有一个典型的多对多关系: CREATE TABLE groups ( id integer PRIMARY KEY); CREATE TABLE elements ( id integer PRIMARY KEY); CREATE TABLE groups_elements

avatar PostgreSQL

Django 与 postgresql - manage.py syncdb 返回错误

问题:Django 与 postgresql - manage.py syncdb 返回错误 我从 Django 开始。我设置了一些使用 SQLite 工作的站点,但是在将 DB 引擎更改为 postgresql manage.py syncdb 后返回错误。我已经用谷歌搜索了 2 天,但对我仍然没有任何作用。Postgres 用户 'joe' 具有超级用户权限和本地 'joe ' 数据库存在。

avatar PostgreSQL