Add mechanism for patching files in containers

This patch adds a way to patch files in a Docker
image built by Kolla. This is very useful for several
reasons, specifically:

- Custom modifications
- The stable branch of some library has a fix but no pip
  package has been released
- Eliminates the need to package your own pip packages
- Eliminates the need to invent your own versioning to prevent
  upstream versioning
- Eliminates the need to manage a pip server
- In other words, it eliminates the need to get a wheel into
  the image and install it manually using any method not
  previously mentioned

It is also highly desirable because, although Kolla can replace
the source for a service with a custom URL for a tarball or its
own Git repo, it cannot do this for dependencies pulled from pip.

I would also like to point out that this is a feature with its own
code path and works only if the user "inserts" a patch into the folder
patches/docker-image/something.patch and creates an analogous series
file for patch source code.

Simply said, this code will never interfere with the upstream build process
since this feature is not intended for use in upstream.
It is rather meant for downstream users who know what they are doing.
Now they just have an option to patch their images.

Everything works on all layers of the Docker image and stores a report
of applied patches which can then be seen in /etc.

This mechanism is similar as debian patch quilt.

Change-Id: I61d0790c5d4d070b7ea9e8c99c0a76ff5d22bf9d

11 files changed, 22 insertions, 0 deletions

diff --git a/docker/nova/nova-api/Dockerfile.j2 b/docker/nova/nova-api/Dockerfile.j2
index 395555564..01399edca 100644
--- a/docker/nova/nova-api/Dockerfile.j2
+++ b/docker/nova/nova-api/Dockerfile.j2
@@ -14,5 +14,7 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
 COPY extend_start.sh /usr/local/bin/kolla_nova_extend_start
 RUN chmod 644 /usr/local/bin/kolla_nova_extend_start
 
+{{ macros.kolla_patch_sources() }}
+
 {% block nova_api_footer %}{% endblock %}
 {% block footer %}{% endblock %}
diff --git a/docker/nova/nova-base/Dockerfile.j2 b/docker/nova/nova-base/Dockerfile.j2
index f6556045d..8f42da4e7 100644
--- a/docker/nova/nova-base/Dockerfile.j2
+++ b/docker/nova/nova-base/Dockerfile.j2
@@ -80,4 +80,6 @@ RUN ln -s nova-base-source/* nova \
     && touch /usr/local/bin/kolla_nova_extend_start \
     && chmod 644 /usr/local/bin/kolla_extend_start /usr/local/bin/kolla_nova_extend_start
 
+{{ macros.kolla_patch_sources() }}
+
 {% block nova_base_footer %}{% endblock %}
diff --git a/docker/nova/nova-compute-ironic/Dockerfile.j2 b/docker/nova/nova-compute-ironic/Dockerfile.j2
index e5d42e4e6..56d1f0abd 100644
--- a/docker/nova/nova-compute-ironic/Dockerfile.j2
+++ b/docker/nova/nova-compute-ironic/Dockerfile.j2
@@ -11,6 +11,8 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
 
 {{ macros.install_packages(nova_compute_ironic_packages | customizable("packages")) }}
 
+{{ macros.kolla_patch_sources() }}
+
 {% block nova_compute_ironic_footer %}{% endblock %}
 {% block footer %}{% endblock %}
 
diff --git a/docker/nova/nova-compute/Dockerfile.j2 b/docker/nova/nova-compute/Dockerfile.j2
index b3ea61ffd..4a50e8a83 100644
--- a/docker/nova/nova-compute/Dockerfile.j2
+++ b/docker/nova/nova-compute/Dockerfile.j2
@@ -110,6 +110,8 @@ RUN {{ macros.install_pip(nova_compute_pip_packages | customizable("pip_packages
     && chmod 644 /usr/local/bin/kolla_nova_extend_start \
     && rm -f /etc/machine-id
 
+{{ macros.kolla_patch_sources() }}
+
 {% block nova_compute_footer %}{% endblock %}
 {% block footer %}{% endblock %}
 
diff --git a/docker/nova/nova-conductor/Dockerfile.j2 b/docker/nova/nova-conductor/Dockerfile.j2
index 1b297a9cd..f91cc76c6 100644
--- a/docker/nova/nova-conductor/Dockerfile.j2
+++ b/docker/nova/nova-conductor/Dockerfile.j2
@@ -10,6 +10,8 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
 COPY extend_start.sh /usr/local/bin/kolla_nova_extend_start
 RUN chmod 644 /usr/local/bin/kolla_nova_extend_start
 
+{{ macros.kolla_patch_sources() }}
+
 {% block nova_conductor_footer %}{% endblock %}
 {% block footer %}{% endblock %}
 
diff --git a/docker/nova/nova-libvirt/Dockerfile.j2 b/docker/nova/nova-libvirt/Dockerfile.j2
index 811916191..2cd88f0a7 100644
--- a/docker/nova/nova-libvirt/Dockerfile.j2
+++ b/docker/nova/nova-libvirt/Dockerfile.j2
@@ -89,5 +89,7 @@ RUN rm -f /etc/libvirt/qemu/networks/default.xml /etc/libvirt/qemu/networks/auto
 COPY extend_start.sh /usr/local/bin/kolla_extend_start
 RUN chmod 644 /usr/local/bin/kolla_extend_start
 
+{{ macros.kolla_patch_sources() }}
+
 {% block nova_libvirt_footer %}{% endblock %}
 {% block footer %}{% endblock %}
diff --git a/docker/nova/nova-novncproxy/Dockerfile.j2 b/docker/nova/nova-novncproxy/Dockerfile.j2
index 3fc35e71f..208637b9a 100644
--- a/docker/nova/nova-novncproxy/Dockerfile.j2
+++ b/docker/nova/nova-novncproxy/Dockerfile.j2
@@ -13,6 +13,8 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
 
 {{ macros.install_packages(nova_novncproxy_packages | customizable("packages")) }}
 
+{{ macros.kolla_patch_sources() }}
+
 {% block nova_novncproxy_footer %}{% endblock %}
 {% block footer %}{% endblock %}
 
diff --git a/docker/nova/nova-scheduler/Dockerfile.j2 b/docker/nova/nova-scheduler/Dockerfile.j2
index 765dc3840..16d8aba10 100644
--- a/docker/nova/nova-scheduler/Dockerfile.j2
+++ b/docker/nova/nova-scheduler/Dockerfile.j2
@@ -7,6 +7,8 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
 
 {% import "macros.j2" as macros with context %}
 
+{{ macros.kolla_patch_sources() }}
+
 {% block nova_scheduler_footer %}{% endblock %}
 {% block footer %}{% endblock %}
 
diff --git a/docker/nova/nova-serialproxy/Dockerfile.j2 b/docker/nova/nova-serialproxy/Dockerfile.j2
index 2c20ffdb8..62e859efa 100644
--- a/docker/nova/nova-serialproxy/Dockerfile.j2
+++ b/docker/nova/nova-serialproxy/Dockerfile.j2
@@ -7,6 +7,8 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
 
 {% import "macros.j2" as macros with context %}
 
+{{ macros.kolla_patch_sources() }}
+
 {% block nova_serialproxy_footer %}{% endblock %}
 {% block footer %}{% endblock %}
 
diff --git a/docker/nova/nova-spicehtml5proxy/Dockerfile.j2 b/docker/nova/nova-spicehtml5proxy/Dockerfile.j2
index e37af27df..fe7a671b4 100644
--- a/docker/nova/nova-spicehtml5proxy/Dockerfile.j2
+++ b/docker/nova/nova-spicehtml5proxy/Dockerfile.j2
@@ -25,6 +25,8 @@ LABEL maintainer="{{ maintainer }}" name="{{ image_name }}" build-date="{{ build
 
 {{ macros.install_packages(nova_spicehtml5proxy_packages | customizable("packages")) }}
 
+{{ macros.kolla_patch_sources() }}
+
 {% block nova_spicehtml5proxy_footer %}{% endblock %}
 {% block footer %}{% endblock %}
 
diff --git a/docker/nova/nova-ssh/Dockerfile.j2 b/docker/nova/nova-ssh/Dockerfile.j2
index 605fa9883..c1ee000cb 100644
--- a/docker/nova/nova-ssh/Dockerfile.j2
+++ b/docker/nova/nova-ssh/Dockerfile.j2
@@ -27,5 +27,7 @@ COPY extend_start.sh /usr/local/bin/kolla_extend_start
 RUN sed -ri 's/session(\s+)required(\s+)pam_loginuid.so/session\1optional\2pam_loginuid.so/' /etc/pam.d/sshd \
     && chmod 644 /usr/local/bin/kolla_extend_start
 
+{{ macros.kolla_patch_sources() }}
+
 {% block nova_ssh_footer %}{% endblock %}
 {% block footer %}{% endblock %}