Undefined function fromYaml in the nginx.tmpl - docker-gen-auto exit

[mhdshakouri]

Hi @evertramos

I was trying to setup the nginx-proxy-automation on my new server but after pulling the package and executing the ./fresh-start.sh, the docker-gen-auto stopped and exited (and with only two running containers remaining - proxy-web-auto and letsencrypt-auto). Upon checking the Docker Compose logs, I founded the following error:
Unable to parse template: template: nginx.tmpl:572: function "fromYaml" not defined

So I had to use the previous version of the code (which I pulled a few months ago on another server, then used the fresh-start.sh), and now, it's working well.

Is this a real bug or did I make a mistake during the set up process?

Regards

[evertramos]

Hi @mhdshakouri,

What distribution are you using? Can you send the logs you got from running fresh-start.sh? It is in local folder or /var/log/basescript.

[mhdshakouri]

Hi,

I'm using the Ubuntu 24.04.2 LTS (GNU/Linux 6.8.0-58-generic x86_64).

I could not found the basecript in the /var/log, so I had to pulling and executing the proxy again to get some logs from the docker-compose , so the following lines are from the docker-compose of the proxy:

docker-gen-auto   | 2025/04/30 14:33:47 Unable to parse template: template: nginx.tmpl:572: function "fromYaml" not defined
docker-gen-auto exited with code 1
letsencrypt-auto  | Info: 4096 bits RFC7919 Diffie-Hellman group found, generation skipped.
letsencrypt-auto  | Reloading nginx docker-gen (using separate container docker-gen-auto)...
letsencrypt-auto  | Reloading nginx (using separate container cd4a5d870263c68e9d174e02f5441f92f66abb0aba2a63352085c2df02ff3cfd)...
proxy-web-auto    | 2025/04/30 14:33:47 [notice] 1#1: signal 1 (SIGHUP) received, reconfiguring
proxy-web-auto    | 2025/04/30 14:33:47 [notice] 1#1: reconfiguring
proxy-web-auto    | 2025/04/30 14:33:47 [notice] 1#1: using the "epoll" event method
proxy-web-auto    | 2025/04/30 14:33:47 [notice] 1#1: start worker processes
proxy-web-auto    | 2025/04/30 14:33:47 [notice] 1#1: start worker process 22
proxy-web-auto    | 2025/04/30 14:33:47 [notice] 1#1: start worker process 23
proxy-web-auto    | 2025/04/30 14:33:47 [notice] 1#1: start worker process 24
docker-gen-auto   | 2025/04/30 14:33:47 Unable to parse template: template: nginx.tmpl:572: function "fromYaml" not defined
docker-gen-auto exited with code 1
letsencrypt-auto  | Reloading nginx docker-gen (using separate container docker-gen-auto)...
letsencrypt-auto  | {"message":"cannot kill container: docker-gen-auto: container 86bb03d2e517f9e5a304c13b8d2cfbc6e6f7266ee7468295998505d102c0a18a is not running"}
letsencrypt-auto  | Reloading nginx (using separate container cd4a5d870263c68e9d174e02f5441f92f66abb0aba2a63352085c2df02ff3cfd)...
letsencrypt-auto  | 2025/04/30 14:33:47 Contents of /app/letsencrypt_service_data did not change. Skipping notification '/app/signal_le_service'
letsencrypt-auto  | 2025/04/30 14:33:47 Watching docker events
proxy-web-auto    | 2025/04/30 14:33:47 [notice] 21#21: gracefully shutting down
proxy-web-auto    | 2025/04/30 14:33:47 [notice] 21#21: exiting
proxy-web-auto    | 2025/04/30 14:33:47 [notice] 21#21: exit
proxy-web-auto    | 2025/04/30 14:33:47 [notice] 19#19: gracefully shutting down
proxy-web-auto    | 2025/04/30 14:33:47 [notice] 19#19: exiting

Regards.

[evertramos]

Could you update and run one more time? I updated the latest container version in .env (

nginx-proxy-automation/bin/.env

Line 25 in c68d430

DEFAULT_DOCKER_GEN_IMAGE_VERSION="0.14"

).

git pull
./bin/fresh-start.sh

[OliverTempel]

Fixed it for me