我正在编写一个基于Docker Compose的Web应用程序,它有许多后台系统 – 一个HTTP API,一个HTTP代理和一个队列.一切都在PHP的Alpine容器中,PHP 5.6或7.0.

我最初在API容器内的Supervisor中设置队列,工作正常.但是,Supervisor / Python使容器比它们应该更胖(80M而不是25M),所以我将队列移动到自己的容器中.它运行大约5分钟并退出以便重新启动,我在Supervisor中使用自动重启系统,所以我已经交换到Docker Compose中的重启系统.我正在使用Compose YAML格式的第2版.

当队列启动时,它会向stdout呈现一条简单的消息：

queue_instance     | Starting queue watcher (path=/remote/queue,proxying to proximate-proxy:8081)

最初我做docker-compose时这很好.但是,对于每次重新启动,我会收到其中三条消息,然后是五条,依此类推,没有限制.如果我执行docker ps,则表示只有一个队列正在运行：

halfer@machine:~/proximate-app$docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                    NAMES
a9c94558769d        proximate-app       "/tmp/container-st..."   2 hours ago         Up 2 hours          0.0.0.0:8084->8084/tcp   app_instance
7e48d6aec459        proximate-api       "sh /tmp/bin/web-s..."   2 hours ago         Up 2 hours          0.0.0.0:8080->8080/tcp   api_instance
86c564becadf        proximate-queue     "sh /var/app/bin/c..."   2 hours ago         Up About a minute                            queue_instance
20c2145f80e4        proximate-proxy     "sh /var/proxy/con..."   2 hours ago         Up 2 hours          0.0.0.0:8081->8081/tcp   proxy_instance

这是我的撰写文件：

version: '2'
services:

  proximate-app:
    container_name: "app_instance"
    image: proximate-app
    ports:
    - "8084:8084"
    links:
    - proximate-api

  # @todo Remove external ports once everything is happy
  proximate-api:
    container_name: "api_instance"
    image: proximate-api
    ports:
    - "8080:8080"
    links:
    - proximate-proxy
    - proximate-queue
    volumes:
    - proximate-volume:/remote/cache
    - proximate-q-volume:/remote/queue
    # Use time and TZ from the host,could alternatively use env vars and set it
    # manually in the container,see https://wiki.alpinelinux.org/wiki/Setting_the_timezone
    - /etc/localtime:/etc/localtime:ro
    - /etc/timezone:/etc/timezone:ro
    # Should perhaps pass this as a var to docker-compose so as not to hardwire it,# but it is fine for now
    environment:
    - PHP_TIMEZONE=Europe/London

  proximate-queue:
    container_name: "queue_instance"
    image: proximate-queue
    restart: always
    links:
    - proximate-proxy
    volumes:
    - proximate-volume:/remote/cache
    - proximate-q-volume:/remote/queue
    environment:
    - PROXY_ADDRESS=proximate-proxy:8081

  # @todo Remove external ports once everything is happy
  proximate-proxy:
    container_name: "proxy_instance"
    image: proximate-proxy
    ports:
    - "8081:8081"
    volumes:
    - proximate-volume:/remote/cache
    environment:
    - PROXY_LOG_PATH=/remote/cache/proxy.log

volumes:
  proximate-volume:
  proximate-q-volume:

相关容器是邻近队列.

我很确定我的容器本身不对这种奇怪负责.我的Dockerfile因此进入：

ENTRYPOINT ["sh","/var/app/bin/container-start.sh"]

而这只是调用启动脚本：

#!/bin/sh

PHP \
    /var/app/bin/queue.PHP \
    --queue-path /remote/queue \
    --proxy-address ${PROXY_ADDRESS}

哪个运行队列进程：

#!/usr/bin/env PHP
PHP

use Proximate\Service\File;
use Proximate\Service\SiteFetcher as SiteFetcherService;
use Proximate\Queue\Read as QueueReader;

$root = realpath(__DIR__ . '/..');
require_once $root . '/vendor/autoload.PHP';

$actions = getopt('p:q:',['proxy-address:','queue-path:']);

$queuePath = isset($actions['queue-path']) ? $actions['queue-path'] : (isset($actions['q']) ? $actions['q'] : null);
$proxyAddress = isset($actions['proxy-address']) ? $actions['proxy-address'] : (isset($actions['p']) ? $actions['p'] : null);

if (!$queuePath || !$proxyAddress)
{
    $command = __FILE__;
    die(
        sprintf("Syntax: %s --proxy-address 

halfer@machine:~/proximate-app$docker-compose up
Creating network "proximateapp_default" with the default driver
Creating proxy_instance
Creating queue_instance
Creating api_instance
Creating app_instance
Attaching to proxy_instance,queue_instance,api_instance,app_instance
proxy_instance     | Teeing proxy logs also to /remote/cache/proxy.log
proxy_instance     | [2017-05-10 09:18:42] stdout.INFO: Setting up queue at `/remote/cache/data` [] []
proxy_instance     | [2017-05-10 09:18:42] stdout.INFO: Starting proxy listener on 172.18.0.2:8081 [] []
queue_instance     | Starting queue watcher (path=/remote/queue,proxying to proximate-proxy:8081)
api_instance       | PHP 7.0.16 Development Server started at Wed May 10 10:19:00 2017
app_instance       | PHP 5.6.29 Development Server started at Wed May 10 09:19:10 2017
app_instance       | PHP 5.6.29 Development Server started at Wed May 10 09:19:10 2017
queue_instance exited with code 0
queue_instance     | Starting queue watcher (path=/remote/queue,proxying to proximate-proxy:8081)
queue_instance     | Starting queue watcher (path=/remote/queue,proxying to proximate-proxy:8081)
queue_instance exited with code 0
queue_instance     | Starting queue watcher (path=/remote/queue,proxying to proximate-proxy:8081)

halfer@machine:~/proximate-app$docker-compose up
Creating network "proximateapp_default" with the default driver
Creating proxy_instance
Creating queue_instance
Creating api_instance
Creating app_instance
Attaching to proxy_instance,app_instance
proxy_instance     | Teeing proxy logs also to /remote/cache/proxy.log
proxy_instance     | [2017-05-10 11:51:17] stdout.INFO: Setting up queue at `/remote/cache/data` [] []
proxy_instance     | [2017-05-10 11:51:17] stdout.INFO: Starting proxy listener on 172.18.0.2:8081 [] []
queue_instance     | Hello everyone! Time=Wed,10 May 2017 11:51:27 +0000. Microtime=1494417087.107185
api_instance       | PHP 7.0.16 Development Server started at Wed May 10 12:51:37 2017
app_instance       | PHP 5.6.29 Development Server started at Wed May 10 11:51:46 2017
app_instance       | PHP 5.6.29 Development Server started at Wed May 10 11:51:46 2017
queue_instance exited with code 0
queue_instance     | Hello everyone! Time=Wed,10 May 2017 11:51:27 +0000. Microtime=1494417087.107185
queue_instance     | Hello everyone! Time=Wed,10 May 2017 11:51:55 +0000. Microtime=1494417115.178871
queue_instance     | Hello everyone! Time=Wed,10 May 2017 11:52:22 +0000. Microtime=1494417142.409513
queue_instance exited with code 0
queue_instance     | Hello everyone! Time=Wed,10 May 2017 11:52:22 +0000. Microtime=1494417142.409513
queue_instance     | Hello everyone! Time=Wed,10 May 2017 11:52:49 +0000. Microtime=1494417169.612523
queue_instance     | Hello everyone! Time=Wed,10 May 2017 11:53:17 +0000. Microtime=1494417197.826749