Expose httpd.listenUrl as an environment variable httpd.listenUrl is exposed via the HTTPD_LISTEN_URL environment variable Change-Id: I8e3538268d7bed950cf88a4b39544dbc76b63b07

diff --git a/README.md b/README.md
index 2fac467..094bad6 100644
--- a/README.md
+++ b/README.md

@@ -85,6 +85,14 @@
 
 Run ```docker-compose up``` to trigger the build and execution of your custom Gerrit docker setup.
 
+## Environment variables
+
+This is a list of available environment variables to change the Gerrit configuration:
+
+* `CANONICAL_WEB_URL`: Optional. Set the `gerrit.canonicalWebUrl` parameter in `gerrit.config`.
+Defaults to `http://<image_hostname>`
+* `HTTPD_LISTEN_URL`: Optional. Override the `httpd.listenUrl` parameter in `gerrit.config`.
+
 ## Using Gerrit in production
 
 When running Gerrit on Docker in production, it is a good idea to rely on a physical external

diff --git a/centos/7/Dockerfile b/centos/7/Dockerfile
index 09bf078..5551719 100644
--- a/centos/7/Dockerfile
+++ b/centos/7/Dockerfile

@@ -18,6 +18,7 @@
 USER gerrit
 
 ENV CANONICAL_WEB_URL=
+ENV HTTPD_LISTEN_URL=
 
 # Allow incoming traffic
 EXPOSE 29418 8080

diff --git a/centos/7/Dockerfile-dev b/centos/7/Dockerfile-dev
index 2c2ee44..dfba96d 100644
--- a/centos/7/Dockerfile-dev
+++ b/centos/7/Dockerfile-dev

@@ -26,6 +26,7 @@
     git config --add -f /var/gerrit/etc/gerrit.config container.javaOptions "-Djava.security.egd=file:/dev/./urandom"
 
 ENV CANONICAL_WEB_URL=
+ENV HTTPD_LISTEN_URL=
 
 # Allow incoming traffic
 EXPOSE 29418 8080

diff --git a/centos/7/entrypoint.sh b/centos/7/entrypoint.sh
index cb459b5..bf40fc8 100755
--- a/centos/7/entrypoint.sh
+++ b/centos/7/entrypoint.sh

@@ -9,6 +9,10 @@
 fi
 
 git config -f /var/gerrit/etc/gerrit.config gerrit.canonicalWebUrl "${CANONICAL_WEB_URL:-http://$HOSTNAME}"
+if [ ${HTTPD_LISTEN_URL} ];
+then
+  git config -f /var/gerrit/etc/gerrit.config httpd.listenUrl ${HTTPD_LISTEN_URL}
+fi
 
 if [ "$1" != "init" ]
 then

diff --git a/ubuntu/18/Dockerfile b/ubuntu/18/Dockerfile
index f945529..f3e3008 100644
--- a/ubuntu/18/Dockerfile
+++ b/ubuntu/18/Dockerfile

@@ -24,6 +24,7 @@
 USER gerrit
 
 ENV CANONICAL_WEB_URL=
+ENV HTTPD_LISTEN_URL=
 
 # Allow incoming traffic
 EXPOSE 29418 8080

diff --git a/ubuntu/18/Dockerfile-dev b/ubuntu/18/Dockerfile-dev
index 761b9d6..a0a35ae 100644
--- a/ubuntu/18/Dockerfile-dev
+++ b/ubuntu/18/Dockerfile-dev

@@ -24,6 +24,7 @@
     git config --add -f /var/gerrit/etc/gerrit.config container.javaOptions "-Djava.security.egd=file:/dev/./urandom"
 
 ENV CANONICAL_WEB_URL=
+ENV HTTPD_LISTEN_URL=
 
 # Allow incoming traffic
 EXPOSE 29418 8080

diff --git a/ubuntu/18/entrypoint.sh b/ubuntu/18/entrypoint.sh
index cb459b5..bf40fc8 100755
--- a/ubuntu/18/entrypoint.sh
+++ b/ubuntu/18/entrypoint.sh

@@ -9,6 +9,10 @@
 fi
 
 git config -f /var/gerrit/etc/gerrit.config gerrit.canonicalWebUrl "${CANONICAL_WEB_URL:-http://$HOSTNAME}"
+if [ ${HTTPD_LISTEN_URL} ];
+then
+  git config -f /var/gerrit/etc/gerrit.config httpd.listenUrl ${HTTPD_LISTEN_URL}
+fi
 
 if [ "$1" != "init" ]
 then