custome template does not apply

[zffocussss]

I used docker build --build-arg TEMPLATE="custom_nginx.template".but kong is still running with /usr/local/openresty/nginx/sbin/nginx -p /usr/local/kong -c nginx.conf instead with --nginx-conf=/custom_nginx.conf.

KONG_BASE image
kong:latest
build cmd
docker build . --build-arg PLUGINS="kong-plugin-url-rewrite" --tag "$IMAGE_NAME"
--build-arg TEMPLATE="custom_nginx.template"

can somebodys help me on it?

[Tieske]

what docker file are you using?

[zffocussss]

what docker file are you using?

I just add a location block in the template

 location /robots.txt {
            return 200 'User-agent: *\nDisallow: /';
        }

but it did not work.I want to make kong it self as a nginx service,not only proxy server

[Tieske]

@zffocussss so were you using https://github.com/Kong/docker-kong/tree/master/customize ?

[hutchic]

possibly related: #331

[zffocussss]

@zffocussss so were you using https://github.com/Kong/docker-kong/tree/master/customize ?

yes.I find the it did not work when I use kong:latest as the base image in the Dockerfile.
but it can work when I use kong:1.4.
it is stange

[zffocussss]

possibly related: #331

Thanks,I ever met this issue.apk update failed permission denied.but it is not related in this case

[Tieske]

My results (adding here as I go):

Configure the test setup:

docker network create kong-net
docker run -d --name kong-database \
               --network=kong-net \
               -p 5432:5432 \
               -e "POSTGRES_USER=kong" \
               -e "POSTGRES_DB=kong" \
               postgres:9.6
docker run --rm \
     --network=kong-net \
     -e "KONG_DATABASE=postgres" \
     -e "KONG_PG_HOST=kong-database" \
     kong:latest kong migrations bootstrap

[Tieske]

created a 1.5.0 template file; templates/nginx150.conf and added a "--" (double dash) somewhere, to make it an invalid file.

Then I did:

docker run --rm \
     --network=kong-net \
     -e "KONG_DATABASE=postgres" \
     -e "KONG_PG_HOST=kong-database" \
     kong:1.5.0-alpine kong migrations reset -y && \
docker run --rm \
     --network=kong-net \
     -e "KONG_DATABASE=postgres" \
     -e "KONG_PG_HOST=kong-database" \
     kong:1.5.0-alpine kong migrations bootstrap && \
docker build . \
    --build-arg KONG_BASE=kong:1.5.0-alpine \
    --build-arg PLUGINS="kong-plugin-url-rewrite" \
    --tag "custom" \
    --build-arg TEMPLATE="templates/nginx150.conf" && \
docker run --rm \
     --network=kong-net \
     -e "KONG_DATABASE=postgres" \
     -e "KONG_PG_HOST=kong-database" \
    custom

The final output is the expected error:

Successfully tagged custom:latest
Error: could not prepare Kong prefix at /usr/local/kong: nginx configuration is invalid (exit code 1):
nginx: [emerg] unknown directive "--}" in /usr/local/kong/nginx.conf:14
nginx: configuration file /usr/local/kong/nginx.conf test failed

It fails on the extra "--" I injected, but this shows that it actually works on 1.5.0, since it was apparently trying to use my corrupted file

[Tieske]

created a 2.0 template file; templates/nginx20.conf and added a "--" (double dash) somewhere, to make it an invalid file.

Then I did:

docker run --rm \
     --network=kong-net \
     -e "KONG_DATABASE=postgres" \
     -e "KONG_PG_HOST=kong-database" \
     kong:2.0.1-alpine kong migrations reset -y && \
docker run --rm \
     --network=kong-net \
     -e "KONG_DATABASE=postgres" \
     -e "KONG_PG_HOST=kong-database" \
     kong:2.0.1-alpine kong migrations bootstrap && \
docker build . \
    --build-arg KONG_BASE=kong:2.0.1-alpine \
    --build-arg PLUGINS="kong-plugin-url-rewrite" \
    --tag "custom" \
    --build-arg TEMPLATE="templates/nginx20.conf" && \
docker run --rm \
     --network=kong-net \
     -e "KONG_DATABASE=postgres" \
     -e "KONG_PG_HOST=kong-database" \
    custom

But this time the final result is Kong actually starting;

Successfully tagged custom:latest
2020/02/08 14:54:23 [notice] 1#0: using the "epoll" event method
2020/02/08 14:54:23 [notice] 1#0: openresty/1.15.8.2
2020/02/08 14:54:23 [notice] 1#0: built by gcc 9.2.0 (Alpine 9.2.0)
2020/02/08 14:54:23 [notice] 1#0: OS: Linux 4.19.76-linuxkit
2020/02/08 14:54:23 [notice] 1#0: getrlimit(RLIMIT_NOFILE): 1048576:1048576
2020/02/08 14:54:23 [notice] 1#0: start worker processes
2020/02/08 14:54:23 [notice] 1#0: start worker process 22
2020/02/08 14:54:23 [notice] 1#0: start worker process 23

[Tieske]

inside the running container the files (custom_nginx.conf, and old_entrypoint.sh)are there, so everything seems in place:

/ $ ls /
bin                   etc                   mnt                   root                  sys
custom_nginx.conf     home                  old-entrypoint.sh     run                   tmp
dev                   lib                   opt                   sbin                  usr
docker-entrypoint.sh  media                 proc                  srv                   var
/ $

[Tieske]

Checking the old-entrypoint.sh:

/ $ cat old-entrypoint.sh
#!/bin/sh
set -e

export KONG_NGINX_DAEMON=off

if [[ "$1" == "kong" ]]; then
  PREFIX=${KONG_PREFIX:=/usr/local/kong}

  if [[ "$2" == "docker-start" ]]; then
    kong prepare -p "$PREFIX"

    ln -sf /dev/stdout $PREFIX/logs/access.log
    ln -sf /dev/stdout $PREFIX/logs/admin_access.log
    ln -sf /dev/stderr $PREFIX/logs/error.log

    exec /usr/local/openresty/nginx/sbin/nginx \
      -p "$PREFIX" \
      -c nginx.conf
  fi
fi

exec "$@"
/ $

Shows the problem, since the commandline is no longer passed along, because this line lost the final part "$@".