icinga2/lib/icinga/hostgroup.cpp

142 lines
4.4 KiB
C++

/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012-2014 Icinga Development Team (http://www.icinga.org) *
* *
* 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 2 *
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#include "icinga/hostgroup.hpp"
#include "config/objectrule.hpp"
#include "base/dynamictype.hpp"
#include "base/logger_fwd.hpp"
#include "base/objectlock.hpp"
#include "base/context.hpp"
#include "base/workqueue.hpp"
#include <boost/foreach.hpp>
using namespace icinga;
REGISTER_TYPE(HostGroup);
INITIALIZE_ONCE(&HostGroup::RegisterObjectRuleHandler);
void HostGroup::RegisterObjectRuleHandler(void)
{
ObjectRule::RegisterType("HostGroup", &HostGroup::EvaluateObjectRules);
}
bool HostGroup::EvaluateObjectRuleOne(const Host::Ptr host, const ObjectRule& rule)
{
DebugInfo di = rule.GetDebugInfo();
std::ostringstream msgbuf;
msgbuf << "Evaluating 'object' rule (" << di << ")";
CONTEXT(msgbuf.str());
Dictionary::Ptr locals = make_shared<Dictionary>();
locals->Set("host", host);
if (!rule.EvaluateFilter(locals))
return false;
std::ostringstream msgbuf2;
msgbuf2 << "Assigning membership for group '" << rule.GetName() << "' to host '" << host->GetName() << "' for rule " << di;
Log(LogDebug, "HostGroup", msgbuf2.str());
String group_name = rule.GetName();
HostGroup::Ptr group = HostGroup::GetByName(group_name);
if (!group) {
Log(LogCritical, "HostGroup", "Invalid membership assignment. Group '" + group_name + "' does not exist.");
return false;
}
/* assign host group membership */
group->ResolveGroupMembership(host, true);
/* update groups attribute for apply */
host->AddGroup(group_name);
return true;
}
void HostGroup::EvaluateObjectRule(const ObjectRule& rule)
{
BOOST_FOREACH(const Host::Ptr& host, DynamicType::GetObjects<Host>()) {
CONTEXT("Evaluating group membership in '" + rule.GetName() + "' for host '" + host->GetName() + "'");
EvaluateObjectRuleOne(host, rule);
}
}
void HostGroup::EvaluateObjectRules(const std::vector<ObjectRule>& rules)
{
ParallelWorkQueue upq;
BOOST_FOREACH(const ObjectRule& rule, rules) {
upq.Enqueue(boost::bind(HostGroup::EvaluateObjectRule, boost::cref(rule)));
}
upq.Join();
}
std::set<Host::Ptr> HostGroup::GetMembers(void) const
{
boost::mutex::scoped_lock lock(m_HostGroupMutex);
return m_Members;
}
void HostGroup::AddMember(const Host::Ptr& host)
{
boost::mutex::scoped_lock lock(m_HostGroupMutex);
m_Members.insert(host);
}
void HostGroup::RemoveMember(const Host::Ptr& host)
{
boost::mutex::scoped_lock lock(m_HostGroupMutex);
m_Members.erase(host);
}
bool HostGroup::ResolveGroupMembership(Host::Ptr const& host, bool add, int rstack) {
if (add && rstack > 20) {
Log(LogWarning, "HostGroup", "Too many nested groups for group '" + GetName() + "': Host '" +
host->GetName() + "' membership assignment failed.");
return false;
}
Array::Ptr groups = GetGroups();
if (groups && groups->GetLength() > 0) {
ObjectLock olock(groups);
BOOST_FOREACH(const String& name, groups) {
HostGroup::Ptr group = HostGroup::GetByName(name);
if (group && !group->ResolveGroupMembership(host, add, rstack + 1))
return false;
}
}
if (add)
AddMember(host);
else
RemoveMember(host);
return true;
}