Unify extra package download with other OSA roles

Convert the extra package download tasks to use the same pattern as
other roles, including validating the checksum of the download.

Change-Id: I72891a3321eda65ef802bcbc5073251fc2fb9a03

defaults/main.yml

@@ -68,7 +68,16 @@ haproxy_ssl_self_signed_subject: "/C=US/ST=Texas/L=San Antonio/O=IT/CN={{ extern
 haproxy_ssl_cipher_suite: "{{ ssl_cipher_suite | default('ECDH+AESGCM:DH+AESGCM:ECDH+AES256:DH+AES256:ECDH+AES128:DH+AES:RSA+AESGCM:RSA+AES:!aNULL:!MD5:!DSS') }}"
 haproxy_ssl_bind_options: "no-sslv3"
 
+# hatop extra package URL and checksum
 haproxy_hatop_download_url: "https://storage.googleapis.com/google-code-archive-downloads/v2/code.google.com/hatop/hatop-0.7.7.tar.gz"
+haproxy_hatop_download_checksum: "sha256:0b9fc1b84ce4e469a069e3a3c7c1b5eea10e6bb24bc66bd32af453acd54636ab"
+
+# Where the extra package download is executed from.
+# Options are ['deployment-host', 'target-host']
+haproxy_hatop_downloader: "deployment-host"
+
+# The location where the extra packages are downloaded to
+haproxy_hatop_download_path: "/opt/cache/files"
 
 ## haproxy default
 # Set the number of retries to perform on a server after a connection failure

tasks/haproxy_install.yml

@@ -24,25 +24,27 @@
   retries: 5
   delay: 2
 
-- name: Download HATop
-  local_action:
-    module: get_url
-    url: "{{ haproxy_hatop_download_url }}"
-    dest: "/tmp/{{ haproxy_hatop_download_url | basename }}"
-    force: yes
-    validate_certs: "{{ haproxy_hatop_download_validate_certs }}"
-  run_once: True
-  vars:
-    ansible_python_interpreter: "/usr/bin/python"
-
-- name: Create HATop directory
+- name: Ensure haproxy_hatop_download_path exists
   file:
-    path: "/opt/{{ haproxy_hatop_download_url | basename | replace('.tar.gz', '') }}"
+    path: "{{ haproxy_hatop_download_path }}"
     state: directory
+  delegate_to: "{{ (haproxy_hatop_downloader == 'deployment-host') | ternary('localhost', omit) }}"
+
+- name: Download extra package
+  get_url:
+    url: "{{ haproxy_hatop_download_url }}"
+    dest: "{{ haproxy_hatop_download_path }}"
+    validate_certs: "{{ haproxy_hatop_download_validate_certs }}"
+  register: fetch_url
+  until: fetch_url | success
+  retries: 3
+  delay: 10
+  delegate_to: "{{ (haproxy_hatop_downloader == 'deployment-host') | ternary('localhost', omit) }}"
 
 - name: Unarchive HATop
   unarchive:
-    src: "/tmp/{{ haproxy_hatop_download_url | basename }}"
+    src: "{{ haproxy_hatop_download_path }}/{{ haproxy_hatop_download_url | basename }}"
+    remote_src: "{{ (haproxy_hatop_downloader == 'deployment-host') | ternary('no', 'yes') }}"
     dest: "/opt"
 
 - name: Install HATop