`reverse-proxy-1` keeps restarting

[christoph-maurer]

reverse_proxy-1  | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
reverse_proxy-1  | /docker-entrypoint.sh: Configuration complete; ready for start up
reverse_proxy-1  | 2026/06/19 13:04:10 [emerg] 1#1: host not found in upstream "backend" in /etc/nginx/conf.d/default.conf:140
reverse_proxy-1  | nginx: [emerg] host not found in upstream "backend" in /etc/nginx/conf.d/default.conf:140
reverse_proxy-1  | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
reverse_proxy-1  | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
reverse_proxy-1  | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
reverse_proxy-1  | 10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
reverse_proxy-1  | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf differs from the packaged version
reverse_proxy-1  | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh
reverse_proxy-1  | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
reverse_proxy-1  | 20-envsubst-on-templates.sh: Running envsubst on /etc/nginx/templates/default.conf.template to /etc/nginx/conf.d/default.conf
reverse_proxy-1  | 20-envsubst-on-templates.sh: Running envsubst on /etc/nginx/templates/security_headers.conf.template to /etc/nginx/conf.d/security_headers.conf
reverse_proxy-1  | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
reverse_proxy-1  | /docker-entrypoint.sh: Configuration complete; ready for start up
reverse_proxy-1  | 2026/06/19 13:04:17 [emerg] 1#1: host not found in upstream "backend" in /etc/nginx/conf.d/default.conf:140
reverse_proxy-1  | nginx: [emerg] host not found in upstream "backend" in /etc/nginx/conf.d/default.conf:140
reverse_proxy-1  | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
reverse_proxy-1  | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
reverse_proxy-1  | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
reverse_proxy-1  | 10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
reverse_proxy-1  | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf differs from the packaged version
reverse_proxy-1  | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh
reverse_proxy-1  | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
reverse_proxy-1  | 20-envsubst-on-templates.sh: Running envsubst on /etc/nginx/templates/default.conf.template to /etc/nginx/conf.d/default.conf
reverse_proxy-1  | 20-envsubst-on-templates.sh: Running envsubst on /etc/nginx/templates/security_headers.conf.template to /etc/nginx/conf.d/security_headers.conf
reverse_proxy-1  | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
reverse_proxy-1  | /docker-entrypoint.sh: Configuration complete; ready for start up
reverse_proxy-1  | 2026/06/19 13:04:30 [emerg] 1#1: host not found in upstream "backend" in /etc/nginx/conf.d/default.conf:140
reverse_proxy-1  | nginx: [emerg] host not found in upstream "backend" in /etc/nginx/conf.d/default.conf:140
reverse_proxy-1  | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
reverse_proxy-1  | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
reverse_proxy-1  | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
reverse_proxy-1  | 10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
reverse_proxy-1  | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf differs from the packaged version
reverse_proxy-1  | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh
reverse_proxy-1  | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
reverse_proxy-1  | 20-envsubst-on-templates.sh: Running envsubst on /etc/nginx/templates/default.conf.template to /etc/nginx/conf.d/default.conf
reverse_proxy-1  | 20-envsubst-on-templates.sh: Running envsubst on /etc/nginx/templates/security_headers.conf.template to /etc/nginx/conf.d/security_headers.conf
reverse_proxy-1  | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
reverse_proxy-1  | /docker-entrypoint.sh: Configuration complete; ready for start up
reverse_proxy-1  | 2026/06/19 13:04:56 [emerg] 1#1: host not found in upstream "backend" in /etc/nginx/conf.d/default.conf:140
reverse_proxy-1  | nginx: [emerg] host not found in upstream "backend" in /etc/nginx/conf.d/default.conf:140
reverse_proxy-1  | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
reverse_proxy-1  | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
reverse_proxy-1  | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
reverse_proxy-1  | 10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
reverse_proxy-1  | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf differs from the packaged version
reverse_proxy-1  | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh
reverse_proxy-1  | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
reverse_proxy-1  | 20-envsubst-on-templates.sh: Running envsubst on /etc/nginx/templates/default.conf.template to /etc/nginx/conf.d/default.conf
reverse_proxy-1  | 20-envsubst-on-templates.sh: Running envsubst on /etc/nginx/templates/security_headers.conf.template to /etc/nginx/conf.d/security_headers.conf
reverse_proxy-1  | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
reverse_proxy-1  | /docker-entrypoint.sh: Configuration complete; ready for start up
reverse_proxy-1  | 2026/06/19 13:05:47 [emerg] 1#1: host not found in upstream "backend" in /etc/nginx/conf.d/default.conf:140
reverse_proxy-1  | nginx: [emerg] host not found in upstream "backend" in /etc/nginx/conf.d/default.conf:140
reverse_proxy-1  | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
reverse_proxy-1  | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
reverse_proxy-1  | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
reverse_proxy-1  | 10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
reverse_proxy-1  | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf differs from the packaged version
reverse_proxy-1  | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh
reverse_proxy-1  | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
reverse_proxy-1  | 20-envsubst-on-templates.sh: Running envsubst on /etc/nginx/templates/default.conf.template to /etc/nginx/conf.d/default.conf
reverse_proxy-1  | 20-envsubst-on-templates.sh: Running envsubst on /etc/nginx/templates/security_headers.conf.template to /etc/nginx/conf.d/security_headers.conf
reverse_proxy-1  | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
reverse_proxy-1  | /docker-entrypoint.sh: Configuration complete; ready for start up
reverse_proxy-1  | 2026/06/19 13:06:48 [emerg] 1#1: host not found in upstream "backend" in /etc/nginx/conf.d/default.conf:140
reverse_proxy-1  | nginx: [emerg] host not found in upstream "backend" in /etc/nginx/conf.d/default.conf:140
reverse_proxy-1 exited with code 1 (restarting)
reverse_proxy-1  | /docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
reverse_proxy-1  | /docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
reverse_proxy-1  | /docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
reverse_proxy-1  | 10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
reverse_proxy-1  | 10-listen-on-ipv6-by-default.sh: info: /etc/nginx/conf.d/default.conf differs from the packaged version
reverse_proxy-1  | /docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh
reverse_proxy-1  | /docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
reverse_proxy-1  | 20-envsubst-on-templates.sh: Running envsubst on /etc/nginx/templates/default.conf.template to /etc/nginx/conf.d/default.conf
reverse_proxy-1  | 20-envsubst-on-templates.sh: Running envsubst on /etc/nginx/templates/security_headers.conf.template to /etc/nginx/conf.d/security_headers.conf
reverse_proxy-1  | /docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
reverse_proxy-1  | /docker-entrypoint.sh: Configuration complete; ready for start up
reverse_proxy-1  | 2026/06/19 13:07:48 [emerg] 1#1: host not found in upstream "backend" in /etc/nginx/conf.d/default.conf:140
reverse_proxy-1  | nginx: [emerg] host not found in upstream "backend" in /etc/nginx/conf.d/default.conf:140
reverse_proxy-1 exited with code 1 (restarting)

AI proposes to replace proxy_pass http://backend; by proxy_pass http://production; in /database_lokal/machine/nginx/templates/default.conf.template.

@simonwacker Do you agree?

After 15 minutes of restarting, the reverse-proxy-1 successfully became healthy.

[simonwacker]

Yes, sure, fixed in 5540f47 Please stop deploying after each of my commits and wait until I have deployed myself and fixed possible bugs that occur in production.