slapos.package: Include promise for setup limits

slapos/package/promise/limits.py

+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+##############################################################################
+#
+# Copyright (c) 2012-2014 Vifib SARL and Contributors.
+# All Rights Reserved.
+#
+# WARNING: This program as such is intended to be used by professional
+# programmers who take the whole responsibility of assessing all potential
+# consequences resulting from its eventual inadequacies and bugs
+# End users who are looking for a ready-to-use solution with commercial
+# guarantees and support are strongly advised to contract a Free Software
+# Service Company
+#
+# This program is Free Software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 3
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+##############################################################################
+
+from slapos.package.base_promise import BasePromise
+import os
+import pkg_resources
+
+
+class Promise(BasePromise):
+
+  configuration_file_path = '/etc/security/limits.conf' 
+
+  def _getLimitsTemplate(self):
+    return pkg_resources.resource_stream(__name__,
+                         'template/limits.conf.in').read()
+
+  def checkConsistency(self, fixit=0, **kw):
+    is_ok = False
+
+    if os.path.exists(self.configuration_file_path):
+       expected_limit = self._getLimitsTemplate()
+       with open(self.configuration_file_path, 'r') as limits_conf:
+         is_ok = expected_limit == limits_conf.read()
+
+    if not is_ok and fixit:
+      return self.fixConsistency(**kw)
+
+    return is_ok
+
+  def fixConsistency(self, **kw):
+    """Configures hostname daemon"""
+
+    self.log("Update limits : %s" % self.configuration_file_path)
+    if os.path.exists(self.configuration_file_path):
+      shutil.copy(self.configuration_file_path, 
+        "%s.%s" % (self.configuration_file_path, time.time()))
+    
+    with open(self.configuration_file_path, 'w') as limits_conf:
+      limits_conf.write(self._getLimitsTemplate())
+
+    return self.checkConsistency(fixit=0, **kw)
+

slapos/package/promise/template/limits.conf.in

+*                hard    nproc           8096
+*                soft    nproc           1024
+*                hard    nofile          32768
+*                soft    nofile          32768
+root             hard    nofile          65535
+root             soft    nofile          65535

slapos/package/test/test_promise_limit.py

+# -*- coding: utf-8 -*-
+##############################################################################
+#
+# Copyright (c) 2012-2014 Vifib SARL and Contributors.
+# All Rights Reserved.
+#
+# WARNING: This program as such is intended to be used by professional
+# programmers who take the whole responsibility of assessing all potential
+# consequences resulting from its eventual inadequacies and bugs
+# End users who are looking for a ready-to-use solution with commercial
+# guarantees and support are strongly advised to contract a Free Software
+# Service Company
+#
+# This program is Free Software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 3
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+##############################################################################
+
+from slapos.package.promise import limits
+import os
+import pkg_resources
+import unittest
+
+def _fake_call(self, *args, **kw):
+  self.last_call = (args, kw)
+
+class testLimitsTestCase(unittest.TestCase):
+
+  def setUp(self):
+    limits.Promise._call = _fake_call
+    if os.path.exists("/tmp/test_promise_testing_limits.conf"):
+      os.remove("/tmp/test_promise_testing_limits.conf")
+
+  def testLimitsCheckConsistency(self):
+    promise = limits.Promise()
+    promise.configuration_file_path = "/tmp/test_promise_testing_limits.conf"
+
+    self.assertFalse(promise.checkConsistency())
+
+    open(promise.configuration_file_path, "w").write("# Something")
+
+    self.assertFalse(promise.checkConsistency())
+
+  def testLimitsFixConsistency(self):
+    limits.Promise._call = _fake_call
+    promise = limits.Promise()
+    promise.configuration_file_path = "/tmp/test_promise_testing_limits.conf"
+
+    self.assertFalse(promise.checkConsistency())
+    self.assertTrue(promise.fixConsistency())
+    self.assertTrue(promise.checkConsistency())
+
+    self.assertTrue(os.path.exists(promise.configuration_file_path))
+    limit_content = open(promise.configuration_file_path, "r").read()
+    self.assertEquals(limit_content, pkg_resources.resource_stream(limits.__name__,
+                                             'template/limits.conf.in').read())