I have Discourse installed in a Ubuntu 18.04 VPS following the standard install instructions. It’s been running well for a couple of years now, but when I went to my site this afternoon, the TLS cert was expired–and since it uses HSTS, that means I was completely locked out of the site. Easy enough, I thought, SSH into the server, install updates (just because), run ./launcher rebuild app, and she’ll be right, mate. Nope, it didn’t work that way; I got an “oops” page. So I decided to reboot the system, and now I’m getting a 502 page when I try to browse there. I can’t start app: root@talk:/var/discourse# ./launcher start app 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 (e5db356e19c947c3e1e20a337aea7ee4bdcfa9bc5f3eac485e76439f3ed3a0e9): Bind for 0.0.0.0:443 failed: port is already allocated Error: failed to start containers: app …and there is indeed something listening on port 443: root@talk:/var/discourse# netstat -tulpn Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 906/docker-proxy tcp 0 0 127.0.0.53:53 0.0.0.0:* LISTEN 427/systemd-resolve tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN 918/docker-proxy tcp 0 0 0.0.0.0:443 0.0.0.0:* LISTEN 892/docker-proxy tcp6 0 0 :::9936 :::* LISTEN 578/sshd udp 0 0 127.0.0.53:53 0.0.0.0:* 427/systemd-resolve I’m afraid I’m stumped–what should I check next?

Another thing you could check is whether a different Discourse container is running, e.g. import. Running the following command and if there are additional containers, looking at the status and ports columns will answer that: docker container ls

Has it need a long time since you did a rebuild? Were there any errors? Did it say something about upgrading postgres? Maybe rebuild again.

[image] pfaffman: Did it say something about upgrading postgres? I’ve been keeping the site up-to-date; I recall the postgres upgrade some time back and I handled that then. I don’t recall seeing anything about it this time around, but it’s easy enough to run another rebuild. But while doing that, I saw: [image] Simon_Manning: Another thing you could check is whether a different Discourse container is running, e.g. import. …and indeed import is running. So I stopped that, and once the rebuild finished, the site came back up. And the Let’s Encrypt cert is renewed (it seems several were issued today, which is a little troublesome), so all’s back now. Thanks for the quick response.

Site's down - app won't start, port 443 conflict?

Product Support Self-hosting

pfaffman (Jay Pfaffman) March 15, 2022, 12:04am 5

Then you want to.

  ./launcher destroy import

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Site's down - app won't start, port 443 conflict?

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