我有几个 Docker 容器：php、nginx、mariadb、redis、adminer，并尝试使用 PhpStorm 和 Xdebug 调试一些 PHP 代码。
主机（联想 T490 笔记本电脑）：
$ hostname
T490
$ docker -v
Docker version 20.10.5, build 55c4c88
$ docker-compose -v
docker-compose version 1.24.1, build 4667896b
$ cat /etc/lsb-release
DISTRIB_ID=neon
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="KDE neon User Edition 5.21"
$ php -v
PHP 7.4.16 (cli) (built: Mar 5 2021 07:54:20) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
with Zend OPcache v7.4.16, Copyright (c), by Zend Technologies
$ lsof -i :9003 | grep LISTEN
java 14868 kane 48u IPv6 401093 0t0 TCP *:9003 (LISTEN)
$ cat /etc/hosts
127.0.0.1 localhost
127.0.1.1 T490
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
172.17.0.1 foo.pl adm.foo.pl api.foo.pl
PhpStorm 2020.3.3 配置：
Docker-compose.yml 文件
version: "3"
services:
php-7.4:
extra_hosts:
- "host.docker.internal:host-gateway"
build: ./docker-images/php-7.4
image: ap/php:7.4
container_name: foo-php-7.4
environment:
- GITHUB_API_TOKEN=${GITHUB_API_TOKEN}
- XDEBUG_IDEKEY=${XDEBUG_IDEKEY}
volumes:
- ~/.composer-docker/cache:/root/.composer/cache:delegated
- ~/.gitconfig:/root/.gitconfig
- ${WORKSPACE_DIR}:/var/www
- ~/.ssh:/root/ssh:ro
- ./docker/php/conf.d/xdebug.ini:/usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini
使用DockerFile安装XDebug，可以通过以下步骤实现：
RUN pecl install xdebug \
&& docker-php-ext-enable xdebug
.env
GITHUB_API_TOKEN=
WORKSPACE_DIR=/home/kane/workspace
XDEBUG_IDEKEY=PHPSTORM
COMPOSE_PROJECT_NAME=yii2fpm
COMPOSE_FILE=docker-compose.yml
X_LEGACY_GD_LIB=1
PHP_CGI_PASS=php-7.4:9000
NGINX_PORT=80
NGINX_SSL_PORT=443
DB_PORT=3306
ADMINER_PORT=8182
xdebug.ini
zend_extension=xdebug
[xdebug]
xdebug.mode=develop,debug
xdebug.client_host=172.17.0.1
xdebug.start_with_request = yes
在运行docker-compose up后，在容器中：
# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default T490 0.0.0.0 UG 0 0 0 eth0
172.18.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
# ping T490
PING T490 (127.0.1.1) 56(84) bytes of data.
64 bytes from T490 (127.0.1.1): icmp_seq=1 ttl=64 time=0.057 ms
# ping 172.17.0.1
PING 172.17.0.1 (172.17.0.1) 56(84) bytes of data.
64 bytes from 172.17.0.1: icmp_seq=1 ttl=64 time=0.145 ms
# telnet 172.17.0.1 9003
Trying 172.17.0.1...
# telnet T490 9003
Trying 127.0.1.1...
telnet: Unable to connect to remote host: Connection refused
# php -v
PHP 7.4.16 (cli) (built: Mar 13 2021 02:52:33) ( NTS )
Copyright (c) The PHP Group
Zend Engine v3.4.0, Copyright (c) Zend Technologies
with Zend OPcache v7.4.16, Copyright (c), by Zend Technologies
with Xdebug v3.0.3, Copyright (c) 2002-2021, by Derick Rethans
当我访问 http://adm.foo.pl/（使用cookie XDEBUG_SESSION:"PHPSTORM"）时，docker日志显示：
NOTICE: PHP message: Xdebug: [Step Debug] Time-out connecting to debugging client, waited: 200 ms. Tried: 172.17.0.1:9003 (through xdebug.client_host/xdebug.client_port) :-(
将xdebug.ini更改为以下内容后：
zend_extension=xdebug
[xdebug]
xdebug.mode=develop,debug
xdebug.discover_client_host = yes
xdebug.start_with_request = yes
原文：
提示信息: PHP信息: Xdebug: [Step Debug] 无法连接调试客户端。尝试：172.18.0.1:9003（从REMOTE_ADDR HTTP标头），localhost:9003（通过xdebug.client_host / xdebug.client_port回退）: -（
添加extra_host后，提示信息如下:
提示信息: PHP信息: Xdebug: [Step Debug] 连接调试客户端超时，等待时间为200毫秒。尝试：host.docker.internal:9003（通过xdebug.client_host/xdebug.client_port）: -(
请帮忙解决问题 :-)
telnet 172.17.0.1 9003是可以工作的。XDebug 日志显示[Step Debug] INFO: Client host discovered through HTTP header, connecting to 172.18.0.1:9003. [34] [Step Debug] INFO: Connected to debugging client: 172.18.0.1:9003 (from REMOTE_ADDR HTTP header). :-)- TomaszKanediscover_client_host的问题，在 Docker 中无法可靠工作。然后，除了ufw部分之外，您的初始设置也是正确的。 - Eugene Morozov