Fix socket growth on system application operations

There is an issue whereby docker exec_run commands do not close the TCP socket.
Thus on each kube application operation, such as application-apply, the docker
exec_run consumes 4 TCP sockets per iteration.  Thus, when it hits limit
of 1024 sockets, system can no longer perform application operations.

This updates the python-docker package. The source code was already in the
cengn mirror; and this update adds a patch to finally close socket in
docker client.

Tests performed:
Install AIO, Storage labs.
system application-upload stx-openstack, apply, remove
system application apply stress test of over 300 iterations
and verify no growth in sockets held by sysinv-conductor.

Change-Id: I21b9e486af1e3bb3b82fd79c3e3662c97b53b732
Closes-Bug: 1838088
Depends-On: https://review.opendev.org/#/c/675686/
Signed-off-by: John Kung <john.kung@windriver.com>

centos_pkg_dirs

@@ -83,6 +83,7 @@ kernel/kernel-modules/mlnx-ofa_kernel
 networking/mellanox/rdma-core
 monitoring/collectd-extensions
 monitoring/influxdb-extensions
+docker/python-docker
 kubernetes/kubernetes
 kubernetes/docker-distribution
 kubernetes/etcd

docker/python-docker/centos/build_srpm.data

@@ -0,0 +1 @@
+TIS_PATCH_VER=1

docker/python-docker/centos/meta_patches/0001-Add-package-versioning.patch

@@ -0,0 +1,25 @@
+From 9bc57c6963fcea63a7793633339e5692ec3e2252 Mon Sep 17 00:00:00 2001
+From: John Kung <john.kung@windriver.com>
+Date: Wed, 7 Aug 2019 13:35:22 -0400
+Subject: [PATCH 1/1] Add package versioning patch
+
+---
+ SPECS/python-docker.spec | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/SPECS/python-docker.spec b/SPECS/python-docker.spec
+index 5ebf252..92420e3 100644
+--- a/SPECS/python-docker.spec
++++ b/SPECS/python-docker.spec
+@@ -18,7 +18,7 @@
+ 
+ Name:           python-%{srcname}
+ Version:        3.3.0
+-Release:        1%{?dist}
++Release:        1.el7%{?_tis_dist}.%{tis_patch_ver}
+ Summary:        A Python library for the Docker Engine API
+ License:        ASL 2.0
+ URL:            https://pypi.python.org/pypi/%{srcname}
+-- 
+1.8.3.1
+

docker/python-docker/centos/meta_patches/0002-Update-spec-include-stx-patches.patch

@@ -0,0 +1,35 @@
+From a0c3f898cabd79b07cc6cc52245de712ee7b46bd Mon Sep 17 00:00:00 2001
+From: John Kung <john.kung@windriver.com>
+Date: Wed, 7 Aug 2019 15:01:11 -0400
+Subject: [PATCH 1/1] Update-spec-include-stx-patches
+
+---
+ SPECS/python-docker.spec | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/SPECS/python-docker.spec b/SPECS/python-docker.spec
+index 92420e3..9a05819 100644
+--- a/SPECS/python-docker.spec
++++ b/SPECS/python-docker.spec
+@@ -29,6 +29,7 @@ Source0:        https://files.pythonhosted.org/packages/source/d/%{srcname}/%{sr
+ # work in RHEL.  This patch converts those environment markers into simple if
+ # statements.
+ Patch1: remove-environment-markers.patch
++Patch2: 0001-Update-client-close-socket.patch
+ 
+ BuildArch:      noarch
+ 
+@@ -138,7 +139,9 @@ run containers, manage containers, manage Swarms, etc.
+ %endif # with_python3
+ 
+ %prep
+-%autosetup -n %{srcname}-%{version} -p 1
++%setup -q -n %{srcname}-%{version}
++%patch2 -p1
++
+ rm -fr docker.egg-info
+ 
+ %build
+-- 
+1.8.3.1
+

docker/python-docker/centos/meta_patches/PATCH_ORDER

@@ -0,0 +1,2 @@
+0001-Add-package-versioning.patch
+0002-Update-spec-include-stx-patches.patch

docker/python-docker/centos/patches/0001-Update-client-close-socket.patch

@@ -0,0 +1,28 @@
+From cbe001760e9893015b1576cba05ebce0938038e4 Mon Sep 17 00:00:00 2001
+From: John Kung <john.kung@windriver.com>
+Date: Wed, 7 Aug 2019 14:06:04 -0400
+Subject: [PATCH 1/1] Update client close socket
+
+---
+ docker/api/client.py | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/docker/api/client.py b/docker/api/client.py
+index 13c292a..7df5eb1 100644
+--- a/docker/api/client.py
++++ b/docker/api/client.py
+@@ -370,7 +370,10 @@ class APIClient(
+         if stream:
+             return gen
+         else:
+-            return six.binary_type().join(gen)
++            try:
++                return six.binary_type().join(gen)
++            finally:
++                response.close()
+ 
+     def _disable_socket_timeout(self, socket):
+         """ Depending on the combination of python version and whether we're
+-- 
+1.8.3.1
+

docker/python-docker/centos/srpm_path

@@ -0,0 +1 @@
+mirror:Source/python-docker-3.3.0-1.el7.src.rpm