Setup logging in the appliance

The appliance currently tries to log to /tmp/gunicorn.log, but thats
misconfigured.  This sets gunicorn up to log to /var/log/akanda/ for
both access and error logs and installs and configures logrotate for
those files.

Change-Id: Ie75f305860a0c5204ec8fe5b1af0de03826aa880

ansible/tasks/akanda.yml

@@ -5,6 +5,7 @@
   with_items:
     - python-pip
     - python-dev
+    - logrotate
 
 - name: copy akanda-appliance code
   synchronize: src={{ playbook_dir }}/.. dest=/tmp/akanda-appliance
@@ -18,6 +19,12 @@
 - name: install akanda-appliance
   command: python setup.py install chdir=/tmp/akanda-appliance
 
+- name: install akanda gunicorn logging directory
+  file: path=/var/log/akanda state=directory
+
+- name: install akanda logrotate config
+  template: src=logrotate.j2 dest=/etc/logrotate.d/akanda
+
 - name: install gunicorn config file
   template: src=gunicorn.j2 dest=/etc/akanda_gunicorn_config
 

ansible/templates/gunicorn.j2

@@ -7,4 +7,5 @@ worker_class ="sync"
 debug = False
 daemon = True
 pidfile = "/var/run/gunicorn.pid"
-errorfile = "/tmp/gunicorn.log"
+errorlog = "/var/log/akanda/gunicorn_error.log"
+accesslog = "/var/log/akanda/gunicorn_access.log"

ansible/templates/logrotate.j2

@@ -0,0 +1,10 @@
+/var/log/akanda/*.log {
+        weekly
+        rotate 7
+        compress
+        missingok
+        create 644 root root
+        postrotate
+            kill -USR1 `cat /var/run/gunicorn.pid`
+        endscript
+}