playbook: Include proof of concept of upgrader role

playbook/roles/upgrader/files/download-upgrader-playbook

+#!/bin/bash
+
+if [ ! -f /etc/opt/slapcache.cfg ]; then
+  slapcache-conf
+fi
+
+DFILE="/opt/upgrader/"
+TFILE="archive.tar.gz"
+
+mkdir -p $DFILE
+cd $DFILE
+
+slapcache-download --destination=$TFILE
+tar -xzvf $TFILE
+
+md5sum $TFILE > "/opt/upgrader/next-upgrader-md5sum"

playbook/roles/upgrader/tasks/main.yml

+---
+  - file: path=/opt/upgrader/ state=directory mode=0755
+
+  - shell: rm -rf /opt/upgrader/playbook/
+  
+  - file: path=/opt/upgrader/playbook/ state=directory mode=0755
+
+  - name: Periodically download the latest playbook 
+    shell: slapcache-download --destination=/opt/upgrader/archive.tar.gz
+
+  - name: Uncompress
+    unarchive: src=/opt/upgrader/archive.tar.gz dest=/opt/upgrader/playbook/
+
+  - name: Save new archive MD5
+    stat: path=/opt/upgrader/archive.tar.gz
+    register:
+      archive
+
+  - name: Update playbook md5
+    shell: echo {{ archive.stat.md5 }} > /opt/upgrader/next-upgrade-signature
+
+  - name: Stat Current Upgrade Signature
+    file: path=/opt/upgrader/current-upgrade-signature state=touch mode="0666" 
+
+  - name: Get /opt/upgrader/next-upgrade-signature content
+    shell: cat /opt/upgrader/next-upgrade-signature
+    register: 
+      next_upgrade_signature
+
+  - name: Get /opt/upgrader/current-upgrade-signature content
+    shell: cat /opt/upgrader/current-upgrade-signature
+    register:
+      current_upgrade_signature
+
+  - name: Do upgrade
+    shell: ansible-playbook {{ upgrader_playbook }} -i hosts >> /opt/upgrader/latest_upgrade.log 
+    when: lookup('file', '/opt/upgrader/next-upgrade-signature') != lookup('file', '/opt/upgrader/current-upgrade-signature')
+    args:
+      chdir: /opt/upgrader/playbook/
+
+  - name: Upgrade Current Upgrade Signature
+    shell: cat /opt/upgrader/next-upgrade-signature > /opt/upgrader/current-upgrade-signature 
+    when: lookup('file', '/opt/upgrader/next-upgrade-signature') != lookup('file', '/opt/upgrader/current-upgrade-signature')
+
+  - name: Set Cron  
+    cron: name="Launch Upgrader" minute="0" hour="*/3" job='ansible-playbook upgrader-run.yml --with-vars "upgrader-playbook={{ upgrader_playbook }}" -i hosts >> /opt/upgrader/latest_upgrade.log' 

playbook/upgrader-run.yml

+- name: a play that runs entirely on the ansible host
+  hosts: 127.0.0.1
+  connection: local
+
+  roles:
+    - upgrader
+

playbook/vifib-upgrade.yml

+- name: a play that runs entirely on the ansible host
+  hosts: 127.0.0.1
+  connection: local
+
+  vars:
+    - upgrader-playbook: vifib-upgrader.yml
+    - computer_name: noname
+    - slapostoken: notoken 
+
+  vars_files:
+    - settings/vifib.yml
+
+  roles:
+    - { role: re6stnet-legacy, package_state: latest }
+    - { role: slapos, package_state: latest }
+    - { role: package, package_name: ntp, package_state: latest }
+    - { role: package, package_name: ntp, package_state: latest }
+    - vifib-server
+    - upgrader

playbook/vifib.yml

@@ -2,6 +2,9 @@
   hosts: 127.0.0.1
   connection: local
 
+  vars:
+    - upgrader-playbook: vifib-upgrader.yml
+
   vars_files:
     - settings/vifib.yml
 
@@ -21,4 +24,4 @@
     - { role: slapos, package_state: present } 
     - { role: package, package_name: ntp, package_state: present }
     - vifib-server
-
+    - upgrader