Nginx deployment issue

[ZiplEix]

What is the problem?

I mage a dockerfile to to deploy my flutter web site. To do this i use a multilayer dockerfile to build the web site and then serve it with nginx. like that :

...

FROM nginx:alpine
COPY --from=0 /app/build/web /usr/share/nginx/html

# config nginx lestener
RUN sed -i 's/listen       80;/listen       8080;/' /etc/nginx/conf.d/default.conf
COPY --from=0 /app/build/web /usr/share/nginx/html

# Expose port 80 and start Nginx server
EXPOSE 8080
CMD ["nginx", "-g", "daemon off;"]

On my computeur it work perfectly. But when I try to deploy it with cap rover y got this error log :

/docker-entrypoint.sh: Configuration complete; ready for start up
2024/04/30 20:49:13 [notice] 1#1: using the "epoll" event method
2024/04/30 20:49:13 [notice] 1#1: nginx/1.25.5
2024/04/30 20:49:13 [notice] 1#1: built by gcc 13.2.1 20231014 (Alpine 13.2.1_git20231014)
2024/04/30 20:49:13 [notice] 1#1: OS: Linux 5.4.0-162-generic
2024/04/30 20:49:13 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576
2024/04/30 20:49:13 [notice] 1#1: start worker processes
2024/04/30 20:49:13 [notice] 1#1: start worker process 28
2024/04/30 20:49:16 [notice] 1#1: signal 3 (SIGQUIT) received, shutting down
2024/04/30 20:49:16 [notice] 28#28: gracefully shutting down
2024/04/30 20:49:16 [notice] 28#28: exiting
2024/04/30 20:49:16 [notice] 28#28: exit
2024/04/30 20:49:16 [notice] 1#1: signal 3 (SIGQUIT) received, shutting down
2024/04/30 20:49:16 [notice] 29#29: gracefully shutting down
2024/04/30 20:49:16 [notice] 29#29: exiting
2024/04/30 20:49:16 [notice] 29#29: exit
2024/04/30 20:49:16 [notice] 1#1: signal 17 (SIGCHLD) received from 28
2024/04/30 20:49:16 [notice] 1#1: worker process 28 exited with code 0
2024/04/30 20:49:16 [notice] 1#1: exit
2024/04/30 20:49:16 [notice] 1#1: signal 17 (SIGCHLD) received from 29
2024/04/30 20:49:16 [notice] 1#1: worker process 29 exited with code 0
2024/04/30 20:49:16 [notice] 1#1: exit

I think that caprover shutdown the instance of nginx created by my dockerfile but I'm not realy shure and I don't know nginx very well. The other app that a deploy on my caprover work very well but they don't use nginx

The full log

/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
10-listen-on-ipv6-by-default.sh: info: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf
/docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
/docker-entrypoint.sh: Configuration complete; ready for start up
2024/04/30 20:38:47 [notice] 1#1: using the "epoll" event method
2024/04/30 20:38:47 [notice] 1#1: nginx/1.25.5
2024/04/30 20:38:47 [notice] 1#1: built by gcc 13.2.1 20231014 (Alpine 13.2.1_git20231014)
2024/04/30 20:38:47 [notice] 1#1: OS: Linux 5.4.0-162-generic
2024/04/30 20:38:47 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576
2024/04/30 20:38:47 [notice] 1#1: start worker processes
2024/04/30 20:38:47 [notice] 1#1: start worker process 29
/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf differs from the packaged version
/docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
/docker-entrypoint.sh: Configuration complete; ready for start up
2024/04/30 20:49:10 [notice] 1#1: using the "epoll" event method
2024/04/30 20:49:10 [notice] 1#1: nginx/1.25.5
2024/04/30 20:49:10 [notice] 1#1: built by gcc 13.2.1 20231014 (Alpine 13.2.1_git20231014)
2024/04/30 20:49:10 [notice] 1#1: OS: Linux 5.4.0-162-generic
2024/04/30 20:49:10 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576
2024/04/30 20:49:10 [notice] 1#1: start worker processes
2024/04/30 20:49:10 [notice] 1#1: start worker process 28
/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf differs from the packaged version
/docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
/docker-entrypoint.sh: Configuration complete; ready for start up
2024/04/30 20:49:13 [notice] 1#1: using the "epoll" event method
2024/04/30 20:49:13 [notice] 1#1: nginx/1.25.5
2024/04/30 20:49:13 [notice] 1#1: built by gcc 13.2.1 20231014 (Alpine 13.2.1_git20231014)
2024/04/30 20:49:13 [notice] 1#1: OS: Linux 5.4.0-162-generic
2024/04/30 20:49:13 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1048576:1048576
2024/04/30 20:49:13 [notice] 1#1: start worker processes
2024/04/30 20:49:13 [notice] 1#1: start worker process 28
2024/04/30 20:49:16 [notice] 1#1: signal 3 (SIGQUIT) received, shutting down
2024/04/30 20:49:16 [notice] 28#28: gracefully shutting down
2024/04/30 20:49:16 [notice] 28#28: exiting
2024/04/30 20:49:16 [notice] 28#28: exit
2024/04/30 20:49:16 [notice] 1#1: signal 3 (SIGQUIT) received, shutting down
2024/04/30 20:49:16 [notice] 29#29: gracefully shutting down
2024/04/30 20:49:16 [notice] 29#29: exiting
2024/04/30 20:49:16 [notice] 29#29: exit
2024/04/30 20:49:16 [notice] 1#1: signal 17 (SIGCHLD) received from 28
2024/04/30 20:49:16 [notice] 1#1: worker process 28 exited with code 0
2024/04/30 20:49:16 [notice] 1#1: exit
2024/04/30 20:49:16 [notice] 1#1: signal 17 (SIGCHLD) received from 29
2024/04/30 20:49:16 [notice] 1#1: worker process 29 exited with code 0
2024/04/30 20:49:16 [notice] 1#1: exit

If applicable, content of captain-definition file:

{
"schemaVersion": 2,
"dockerfilePath": "./Dockerfile"
}

Steps to reproduce the problem:

from what I see the probleme occurd every time nginx is involved in the dockerfile I want to deploy with caprover

Output of the following command on your server:

uname -a && lsb_release -a && free -h

[githubsaturn]

On my computeur it work perfectly. But when I try to deploy it with cap rover y got this error log :

Two things to try out:

1- Change your Dockerfile to bare minimum, deploy and see if it works:

FROM nginx:alpine
CMD ["nginx", "-g", "daemon off;"]

If it works, then try:

FROM nginx:alpine
RUN sed -i 's/listen       80;/listen       8080;/' /etc/nginx/conf.d/default.conf
EXPOSE 8080
CMD ["nginx", "-g", "daemon off;"]

If it works, then the problem is the part of the Dockerfile that you removed

2- Build an image locally on your computer and push the exact same image to a docker registry and use the exact same image on CapRover. Does this work?

[githubsaturn]

To add more context:
CapRover DOES NOT stop a container automatically in any scenario.