Docker部署Gitlab后，外部Nginx反向代理出现8080连接拒绝问题

部署环境与初始命令 #

我通过Docker部署GitLab EE，执行的部署命令如下：

sudo docker run --detach \
  --hostname git.xxx.com \
  --publish 8443:443 --publish 880:80 --publish 822:22 \
  --name gitlab \
  --restart always \
  --volume $GITLAB_HOME/config:/etc/gitlab \
  --volume $GITLAB_HOME/logs:/var/log/gitlab \
  --volume $GITLAB_HOME/data:/var/opt/gitlab \
  --shm-size 256m \
  gitlab/gitlab-ee:latest

外部Nginx配置修改 #

为替换容器内置的Nginx，使用自行安装的Nginx做反向代理，我在gitlab.rb中添加了以下配置：

# Define the external url
external_url 'http://git.stupidpz.com'

# Disable the built-in nginx
nginx['enable'] = false

# Disable the built-in puma
puma['enable'] = false

# Set the internal API URL
gitlab_rails['internal_api_url'] = 'http://git.stupidpz.com'

# Define the web server process user (ubuntu/nginx)
web_server['external_users'] = ['nginx']

错误日志 #

配置完成后GitLab无法访问，在/var/log/gitlab/gitlab_workhorse/current日志文件中发现重复的连接错误：

{"correlation_id":"","duration_ms":0,"error":"badgateway: failed to receive response: dial tcp 127.0.0.1:8080: connect: connection refused","level":"error","method":"GET","msg":"","time":"2023-01-25T20:57:21Z","uri":""}
{"correlation_id":"","duration_ms":0,"error":"badgateway: failed to receive response: dial tcp 127.0.0.1:8080: connect: connection refused","level":"error","method":"GET","msg":"","time":"2023-01-25T20:57:31Z","uri":""}
{"correlation_id":"","duration_ms":0,"error":"badgateway: failed to receive response: dial tcp 127.0.0.1:8080: connect: connection refused","level":"error","method":"GET","msg":"","time":"2023-01-25T20:57:41Z","uri":""}
{"correlation_id":"","duration_ms":0,"error":"badgateway: failed to receive response: dial tcp 127.0.0.1:8080: connect: connection refused","level":"error","method":"GET","msg":"","time":"2023-01-25T20:57:51Z","uri":""}

核心疑问 #

除修改gitlab.rb外未进行其他操作，想明确该错误中dial tcp 127.0.0.1:8080的来源是什么。

内容的提问来源于stack exchange，提问作者StupidPz