Docker plugin update broke site during latest update

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1

I ran the latest update. The update page 1st prompted me to update the Docker plugin. After doing so i got the message saying i’d need to rebuild the apps in the server as there was an issue with the site image, which seems to happen every 3 or 4 times i update.

In the server when trying to rebuild i get this error message:

x86_64 arch detected.

starting up existing container
+ /usr/bin/docker start app
Error response from daemon: driver failed programming external connectivity on endpoint app (83f3d2e718d3bedaac581e14f9ce21eed1c41564483523b3a7ae2a2af1baf6fe): Error starting userland proxy: listen tcp4 0.0.0.0:443: bind: address already in use
Error: failed to start containers: app

If i try discourse-doctor i get a similar message:

starting up existing container
+ /usr/bin/docker start app
Error response from daemon: driver failed programming external connectivity on endpoint app (8937ea42fba161e42f9ffde7b2958bdba6212f0030aaebbebfe15a1fe69a0156): Error starting userland proxy: listen tcp4 0.0.0.0:443: bind: address already in use
Error: failed to start containers: app
Failed to restart the container.

The site itself is throwing an SSL error.

Anyone know what might cause this?

2

You probably have another webserver or reverse proxy running on the server itself and that is occupying port 443

Can you share the output of

netstat -tulpn | grep 443

3

Thanks for your reply @itsbhanusharma

(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp        0      0 0.0.0.0:443             0.0.0.0:*               LISTEN

with sudo

sudo netstat -tulpn | grep 443
tcp        0      0 0.0.0.0:443             0.0.0.0:*               LISTEN      868/nginx: master p

I’ve tried removing all plugins as suggested, and ran discourse-doctor again but it won’t build and fire up.

4

Could you share your app.yml (redact any passwords & sensitive info)

In the meantime, try

sudo systemctl stop nginx

Then try rebuilding?

From what I can see, You somehow have an external nginx running on this server. Unless you’ve configured it to reverse proxy discourse, this is the cause of your failed rebuild.

5

Thank you so much @itsbhanusharma. That command, then rebuilding the app worked to get it live again. I have no idea what caused that issue.

6

If you didn’t install nginx on your server, You might want to do

sudo apt purge nginx*
sudo apt autoremove

To make sure nginx doesn’t start again.