Fabio/nginx-proxy-auto-docker
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prepend the generated nginx config file with a warning when $CurrentContainer is null

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One case where `$CurrentContainer` ends up being `null` is when you use the template from a separated container having no exposed port and you call the docker-gen process with the `-only-exposed` option.

----

Example compose file to reproduce the case:

    version: '2'

    networks:
      default: {}

    volumes:
      nginx_conf: {}
      nginx_certs: {}

    services:
      nginx:
        image: nginx
        container_name: nginx
        volumes:
          - nginx_conf:/etc/nginx/conf.d
          - nginx_certs:/etc/nginx/certs

      dockergen:
        image: jwilder/docker-gen
        command: -notify-sighup nginx -only-exposed -watch /etc/docker-gen/templates/nginx.tmpl /etc/nginx/conf.d/default.conf
        volumes_from:
          - nginx
        volumes:
          - /var/run/docker.sock:/tmp/docker.sock:ro
          - nginx_conf:/etc/nginx/conf.d
          - nginx_certs:/etc/nginx/certs
          - ./nginx.tmpl:/etc/docker-gen/templates/nginx.tmpl
This commit is contained in:
Thomas LEVEIL 2017-02-27 00:56:40 +01:00
parent 6554a1cf28
commit 58f71d7907
1 changed files with 17 additions and 0 deletions
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17
nginx.tmpl
View file

@ -1,5 +1,22 @@
{{ $CurrentContainer := where $ "ID" .Docker.CurrentContainerID | first }}
{{/* When docker-gen is running from a separated container and with the
-only-exposed (or -only-published) option, the template won't be provided
with the current (docker-gen) container info, making $currentContainer `null`.
*/}}
{{ if not $CurrentContainer }}
###############################################################################
# #
# Are you using using jwilder/nginx-proxy's nginx.tmpl with docker-gen #
# running in a separated container? #
# #
# Consider removing the docker-gen `-only-exposed` option and make sure #
# the docker-gen container has access to the same networks as the nginx #
# container. #
# #
###############################################################################
{{ end }}
{{ define "upstream" }}
{{ if .Address }}
{{/* If we got the containers from swarm and this container's port is published to host, use host IP:PORT */}}