Merge lp:~louis/charms/precise/rsyslog/trunk into lp:charms/rsyslog

[Louis Bouchard]

Added config parameters to control logrotate

[Marco Ceppi (marcoceppi)]

LGTM

review: Approve

=== added file 'config.yaml'
--- config.yaml	1970-01-01 00:00:00 +0000
+++ config.yaml	2014-03-17 10:46:51 +0000
@@ -0,0 +1,9 @@
+options:
+  syslog_rotate:
+    type: int
+    default: 7
+    description: "Number of days to rotate /var/log/syslog file"
+  messages_rotate:
+    type: int
+    default: 4
+    description: "Number of days to rotate /var/log/messages and other associated files"

=== added file 'hooks/config-changed'
--- hooks/config-changed	1970-01-01 00:00:00 +0000
+++ hooks/config-changed	2014-03-17 10:46:51 +0000
@@ -0,0 +1,39 @@
+#!/usr/bin/env python
+
+import re
+import subprocess
+import json
+
+
+def juju_log(message=None):
+    return (subprocess.call(['juju-log', str(message)]) == 0)
+
+log_rotate_conf = '/etc/logrotate.d/rsyslog'
+
+config_cmd_line = ['config-get', '--format=json']
+
+syslog_rotate_interval = str(json.loads(subprocess.check_output(
+    config_cmd_line + ['syslog_rotate'])))
+messages_rotate_interval = str(json.loads(subprocess.check_output(
+    config_cmd_line + ['messages_rotate'])))
+
+with open(log_rotate_conf, mode='r') as config_file:
+    config = config_file.readlines()
+    config_file.close()
+
+    param_index = config.index('/var/log/syslog\n')
+    replace_pattern = syslog_rotate_interval + '\n'
+    config[param_index+2] = re.sub(r'\d*\n$',
+                                   replace_pattern, config[param_index+2])
+    juju_log("syslog_rotate_interval set to %s" % syslog_rotate_interval)
+
+    param_index = config.index('/var/log/messages\n')
+    replace_pattern = messages_rotate_interval + '\n'
+    config[param_index+2] = re.sub(r'\d*\n$',
+                                   replace_pattern, config[param_index+2])
+    juju_log("messages_rotate_interval set to %s" % messages_rotate_interval)
+
+with open(log_rotate_conf, mode='w') as config_file:
+    for line in config:
+        config_file.write(line)
+    config_file.close