Update pip primary and fallback URL's, and set version

This patch updates the primary and secondary locations for
downloading the get-pip.py script and also sets the
installation process to ensure that a known, stable
version of pip is installed.

Change-Id: Ib463f61b1ad44aec0e3953a89d58596c3e87f2e0

defaults/main.yml

@@ -14,9 +14,9 @@
 # limitations under the License.
 
 ## Path to pip download/installation script.
-pip_upstream_repo_url: https://raw.github.com/pypa/pip/7.1.1/contrib
-pip_get_pip_url: "{{ pip_upstream_repo_url }}/get-pip.py"
-pip_get_pip_fallback_url: https://bootstrap.pypa.io/get-pip.py
+pip_upstream_url: https://bootstrap.pypa.io/get-pip.py
+pip_fallback_url: https://raw.githubusercontent.com/pypa/get-pip/master/get-pip.py
+pip_version: "7.1.2"
 
 # Additional options that you might want to pass to "get-pip.py" when installing pip.
 # Default `pip_get_pip_options` is an empty string.

tasks/main.yml

@@ -40,7 +40,7 @@
 
 - name: Get Modern PIP
   get_url:
-    url: "{{ pip_get_pip_url }}"
+    url: "{{ pip_upstream_url }}"
     dest: "/opt/get-pip.py"
     force: "yes"
     validate_certs: "yes"
@@ -55,7 +55,7 @@
 
 - name: Get Modern PIP using fallback URL
   get_url:
-    url: "{{ pip_get_pip_fallback_url }}"
+    url: "{{ pip_fallback_url }}"
     dest: "/opt/get-pip.py"
     force: "yes"
     validate_certs: "yes"
@@ -69,7 +69,7 @@
     - pip-install
 
 - name: Install PIP
-  shell: "python /opt/get-pip.py {{ pip_get_pip_options }}"
+  shell: "python /opt/get-pip.py {{ pip_get_pip_options }} 'pip=={{ pip_version }}'"
   ignore_errors: true
   register: pip_install
   until: pip_install | success
@@ -79,7 +79,7 @@
     - pip-install
 
 - name: Install PIP (fall back mode)
-  shell: "python /opt/get-pip.py --isolated"
+  shell: "python /opt/get-pip.py --isolated {{ pip_get_pip_options }} 'pip=={{ pip_version }}'"
   when: pip_install.rc != 0
   register: pip_install_fall_back
   until: pip_install_fall_back | success