我有一个任务,在Fargate上有两个容器:一个Java和一个php / nginx容器。
java容器将其内部端口80映射到外部端口8080,而php容器将其内部端口80映射到外部端口8081。
任务正在使用awsvpc网络模式。根据{{3}},一旦他们在Fargate上,他们就应该能够通过localhost相互通信。
我尝试通过使Java容器使用“ localhost:8081”向PHP容器发送请求来对此进行测试:
public boolean isPHPReachable() {
System.out.println("Attempting to make request to PHP");
try {
final URL url = new URL("http://localhost:8081/test");
final HttpURLConnection con = (HttpURLConnection) url.openConnection();
con.setRequestMethod("GET");
final int status = con.getResponseCode();
System.out.printf("Get request to PHP resulted in a %d: %s", status, con.getResponseMessage());
return status == 200;
} catch (final IOException err) {
err.printStackTrace();
return false;
}
它应该被击中的php代码是这样的:
<?php
if ($_GET['q'] === 'test') {
echo('healthy');
die;
}
“ q”由nginx设置(请参见下面的配置)。
但是,当Java尝试向PHP发送请求时,我看到cloudwatch日志显示错误:
22:55:04
Attempting to make request to PHP
22:55:04
java.net.ConnectException: Connection refused (Connection refused)
我试图直接联系PHP容器,但是超时。当我尝试使用Java时不会发生这种情况。
潜在问题1:Nginx配置错误
我怀疑这可能是nginx问题。但是,当我在本地计算机上创建PHP容器时,我无法重现该问题-当我ping localhost:8081时可以访问。
仅在Fargate中出现问题。
这是我的配置:
# For more information on configuration, see:
# * Official English Documentation: http://nginx.org/en/docs/
# * Official Russian Documentation: http://nginx.org/ru/docs/
user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;
# Load dynamic modules. See /usr/share/doc/nginx/README.dynamic.
include /usr/share/nginx/modules/*.conf;
events {
worker_connections 1024;
}
http {
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log /var/log/nginx/access.log main;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
types_hash_max_size 2048;
include /etc/nginx/mime.types;
default_type application/octet-stream;
# Load modular configuration files from the /etc/nginx/conf.d directory.
# See http://nginx.org/en/docs/ngx_core_module.html#include
# for more information.
include /etc/nginx/conf.d/*.conf;
server {
# Reject requests not matching any server block
listen 80 default_server;
server_name "";
return 410;
}
server {
listen 80;
root /var/www/public_html;
server_name localhost;
index index.php;
set_real_ip_from 0.0.0.0/0; # we trust that the webserver is firewalled
real_ip_header X-Forwarded-For;
set $webroot $document_root;
error_page 404 410 /404_empty.html;
autoindex off;
# Disable server signature
# (i.e. remove "nginx 1.10" or similar from error pages and response headers)
server_tokens off;
#################
# PHP locations #
#################
location / {
rewrite ^/(.*)$ /sites/all/index.php?q=$1;
error_page 404 /sites/all/index.php;
}
}
我认为情况并非如此。附加到此容器的安全组允许从任何目标到任何端口的入站TCP请求。它还允许所有出站请求。
有人发现眼前的问题吗?有调试提示吗?