Here's the proposal patch
From 92eaf0278ff14f67255e03ee0f2f9536c83f64d1 Mon Sep 17 00:00:00 2001
From: Eric Desrochers <eric.desroch...@canonical.com>
Date: Mon, 21 Oct 2019 21:08:44 -0400
Subject: [PATCH] Allow nginx to start on ipv6 disabled system
---
debian/changelog | 7 ++
.../sites-available/{default => default-ipv6} | 0
debian/conf/sites-available/default-noipv6 | 91 +++++++++++++++++++
debian/nginx-common.postinst | 11 ++-
4 files changed, 107 insertions(+), 2 deletions(-)
rename debian/conf/sites-available/{default => default-ipv6} (100%)
create mode 100644 debian/conf/sites-available/default-noipv6
diff --git a/debian/changelog b/debian/changelog
index a692f86..da11559 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,10 @@
+nginx (1.16.1-3) unstable; urgency=medium
+
+ * Allow nginx to start and complete the install
+ on ipv6 disabled system (Closes: #942817)
+
+ -- Eric Desrochers <eric.desroch...@canonical.com> Mon, 21 Oct 2019 21:06:25 -0400
+
nginx (1.16.1-2) unstable; urgency=medium
* http-lua: Downgrade to 0.10.13 (Closes: #941917)
diff --git a/debian/conf/sites-available/default b/debian/conf/sites-available/default-ipv6
similarity index 100%
rename from debian/conf/sites-available/default
rename to debian/conf/sites-available/default-ipv6
diff --git a/debian/conf/sites-available/default-noipv6 b/debian/conf/sites-available/default-noipv6
new file mode 100644
index 0000000..ba91b6b
--- /dev/null
+++ b/debian/conf/sites-available/default-noipv6
@@ -0,0 +1,91 @@
+##
+# You should look at the following URL's in order to grasp a solid understanding
+# of Nginx configuration files in order to fully unleash the power of Nginx.
+# https://www.nginx.com/resources/wiki/start/
+# https://www.nginx.com/resources/wiki/start/topics/tutorials/config_pitfalls/
+# https://wiki.debian.org/Nginx/DirectoryStructure
+#
+# In most cases, administrators will remove this file from sites-enabled/ and
+# leave it as reference inside of sites-available where it will continue to be
+# updated by the nginx packaging team.
+#
+# This file will automatically load configuration files provided by other
+# applications, such as Drupal or Wordpress. These applications will be made
+# available underneath a path with that package name, such as /drupal8.
+#
+# Please see /usr/share/doc/nginx-doc/examples/ for more detailed examples.
+##
+
+# Default server configuration
+#
+server {
+ listen 80 default_server;
+ #listen [::]:80 default_server;
+
+ # SSL configuration
+ #
+ # listen 443 ssl default_server;
+ # listen [::]:443 ssl default_server;
+ #
+ # Note: You should disable gzip for SSL traffic.
+ # See: https://bugs.debian.org/773332
+ #
+ # Read up on ssl_ciphers to ensure a secure configuration.
+ # See: https://bugs.debian.org/765782
+ #
+ # Self signed certs generated by the ssl-cert package
+ # Don't use them in a production server!
+ #
+ # include snippets/snakeoil.conf;
+
+ root /var/www/html;
+
+ # Add index.php to the list if you are using PHP
+ index index.html index.htm index.nginx-debian.html;
+
+ server_name _;
+
+ location / {
+ # First attempt to serve request as file, then
+ # as directory, then fall back to displaying a 404.
+ try_files $uri $uri/ =404;
+ }
+
+ # pass PHP scripts to FastCGI server
+ #
+ #location ~ \.php$ {
+ # include snippets/fastcgi-php.conf;
+ #
+ # # With php-fpm (or other unix sockets):
+ # fastcgi_pass unix:/run/php/php7.3-fpm.sock;
+ # # With php-cgi (or other tcp sockets):
+ # fastcgi_pass 127.0.0.1:9000;
+ #}
+
+ # deny access to .htaccess files, if Apache's document root
+ # concurs with nginx's one
+ #
+ #location ~ /\.ht {
+ # deny all;
+ #}
+}
+
+
+# Virtual Host configuration for example.com
+#
+# You can move that to a different file under sites-available/ and symlink that
+# to sites-enabled/ to enable it.
+#
+#server {
+# listen 80;
+# listen [::]:80;
+#
+# server_name example.com;
+#
+# root /var/www/example.com;
+# index index.html;
+#
+# location / {
+# try_files $uri $uri/ =404;
+# }
+#}
diff --git a/debian/nginx-common.postinst b/debian/nginx-common.postinst
index f83032d..3dae290 100644
--- a/debian/nginx-common.postinst
+++ b/debian/nginx-common.postinst
@@ -47,10 +47,17 @@ case "$1" in
# If a symlink doesn't exist and can be created, then create it.
if [ -z $2 ] && [ ! -e /etc/nginx/sites-enabled/default ] &&
- [ -d /etc/nginx/sites-enabled ] && [ -d /etc/nginx/sites-available ]; then
- ln -s /etc/nginx/sites-available/default /etc/nginx/sites-enabled/default
+ [ -d /etc/nginx/sites-enabled ] && [ -d /etc/nginx/sites-available ] &&
+ [ ! -f /proc/net/if_inet6 ]; then
+ ln -s /etc/nginx/sites-available/default-noipv6 /etc/nginx/sites-enabled/default
fi
+ if [ -z $2 ] && [ ! -e /etc/nginx/sites-enabled/default ] &&
+ [ -d /etc/nginx/sites-enabled ] && [ -d /etc/nginx/sites-available ] &&
+ [ -f /proc/net/if_inet6 ]; then
+ ln -s /etc/nginx/sites-available/default-ipv6 /etc/nginx/sites-enabled/default
+ fi
+
# Create a default index page when not already present.
if [ ! -e /var/www/html/index.nginx-debian.html ]; then
cp /usr/share/nginx/html/index.html /var/www/html/index.nginx-debian.html
--
2.17.1
