[extensions-web] docker: substitute $EGO_NODE_ADDRESS at runtime instead of build time

[Yuri Konotopov <ykonotopov src gnome org>]

commit b315cdbb21e8d029be1551f918f72ec1ebdca9d2
Author: Yuri Konotopov <ykonotopov gnome org>
Date:   Fri Jan 11 21:10:42 2019 +0400

    docker: substitute $EGO_NODE_ADDRESS at runtime instead of build time

 openshift/docker/docker-compose.yml           |  1 +
 openshift/docker/nginx/Dockerfile             |  9 +++++----
 openshift/templates/extensions-web-nginx.json | 21 ++++++++++++++-------
 3 files changed, 20 insertions(+), 11 deletions(-)
---
diff --git a/openshift/docker/docker-compose.yml b/openshift/docker/docker-compose.yml
index 43abc29..ebe70d4 100644
--- a/openshift/docker/docker-compose.yml
+++ b/openshift/docker/docker-compose.yml
@@ -39,6 +39,7 @@ services:
     build:
       context: nginx
       dockerfile: Dockerfile
+    command: bash -c "envsubst '$$EGO_NODE_ADDRESS' < /etc/nginx/nginx.conf.template > /etc/nginx/nginx.conf 
&& nginx -g 'daemon off;'"
     environment:
       EGO_NODE_ADDRESS: extensions-web
     restart: always
diff --git a/openshift/docker/nginx/Dockerfile b/openshift/docker/nginx/Dockerfile
index ed8c8f7..8869f5b 100644
--- a/openshift/docker/nginx/Dockerfile
+++ b/openshift/docker/nginx/Dockerfile
@@ -2,13 +2,14 @@ FROM nginx:stable
 
 MAINTAINER Yuri Konotopov <ykonotopov gnome org>
 
-COPY nginx.conf /tmp
+COPY nginx.conf /etc/nginx/nginx.conf.template
 
 RUN set -ex \
-       && envsubst '$EGO_NODE_ADDRESS' < /tmp/nginx.conf > /etc/nginx/nginx.conf \
-       && rm /tmp/nginx.conf \
        && mkdir -p /extensions-web/www \
        && chmod g+rwX -R /extensions-web/www \
        && chmod g+rwX -R /var/log/nginx \
        && chmod g+rwX -R /var/cache/nginx \
-       && chmod g+rwX -R /var/run
+       && chmod g+rwX -R /var/run \
+       && touch /etc/nginx/nginx.conf \
+       && chmod g+rw /etc/nginx/nginx.conf \
+       && chmod g+rw /etc/nginx/nginx.conf.template
diff --git a/openshift/templates/extensions-web-nginx.json b/openshift/templates/extensions-web-nginx.json
index e77e33b..2e9a01a 100644
--- a/openshift/templates/extensions-web-nginx.json
+++ b/openshift/templates/extensions-web-nginx.json
@@ -267,13 +267,7 @@
             "from": {
               "kind": "ImageStreamTag",
               "name": "nginx:stable"
-            },
-            "env": [
-              {
-                "name": "EGO_NODE_ADDRESS",
-                "value": "${EGO_NODE_ADDRESS}"
-              }
-            ]
+            }
           }
         },
         "output": {
@@ -497,6 +491,19 @@
               {
                 "name": "frontend",
                 "image": "${DEFAULT_DOCKER_REGISTRY}/${NAME}/frontend:latest",
+                "command": [
+                    "bash"
+                ],
+                "args": [
+                    "-c",
+                    "envsubst '$EGO_NODE_ADDRESS' < /etc/nginx/nginx.conf.template > /etc/nginx/nginx.conf 
&& nginx -g 'daemon off;'"
+                ],
+                "env": [
+                  {
+                    "name": "EGO_NODE_ADDRESS",
+                    "value": "${EGO_NODE_ADDRESS}"
+                  }
+                ],
                 "ports": [
                   {
                     "containerPort": 8080