1 /* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
2
3 #include "icinga/dependency.hpp"
4 #include "icinga/service.hpp"
5 #include "config/configitembuilder.hpp"
6 #include "config/applyrule.hpp"
7 #include "base/initialize.hpp"
8 #include "base/configtype.hpp"
9 #include "base/logger.hpp"
10 #include "base/context.hpp"
11 #include "base/workqueue.hpp"
12 #include "base/exception.hpp"
13
14 using namespace icinga;
15
__anonb55e742e0102() 16 INITIALIZE_ONCE([]() {
17 ApplyRule::RegisterType("Dependency", { "Host", "Service" });
18 });
19
EvaluateApplyRuleInstance(const Checkable::Ptr & checkable,const String & name,ScriptFrame & frame,const ApplyRule & rule)20 bool Dependency::EvaluateApplyRuleInstance(const Checkable::Ptr& checkable, const String& name, ScriptFrame& frame, const ApplyRule& rule)
21 {
22 if (!rule.EvaluateFilter(frame))
23 return false;
24
25 DebugInfo di = rule.GetDebugInfo();
26
27 #ifdef _DEBUG
28 Log(LogDebug, "Dependency")
29 << "Applying dependency '" << name << "' to object '" << checkable->GetName() << "' for rule " << di;
30 #endif /* _DEBUG */
31
32 ConfigItemBuilder builder{di};
33 builder.SetType(Dependency::TypeInstance);
34 builder.SetName(name);
35 builder.SetScope(frame.Locals->ShallowClone());
36 builder.SetIgnoreOnError(rule.GetIgnoreOnError());
37
38 Host::Ptr host;
39 Service::Ptr service;
40 tie(host, service) = GetHostService(checkable);
41
42 builder.AddExpression(new SetExpression(MakeIndexer(ScopeThis, "parent_host_name"), OpSetLiteral, MakeLiteral(host->GetName()), di));
43 builder.AddExpression(new SetExpression(MakeIndexer(ScopeThis, "child_host_name"), OpSetLiteral, MakeLiteral(host->GetName()), di));
44
45 if (service)
46 builder.AddExpression(new SetExpression(MakeIndexer(ScopeThis, "child_service_name"), OpSetLiteral, MakeLiteral(service->GetShortName()), di));
47
48 String zone = checkable->GetZoneName();
49
50 if (!zone.IsEmpty())
51 builder.AddExpression(new SetExpression(MakeIndexer(ScopeThis, "zone"), OpSetLiteral, MakeLiteral(zone), di));
52
53 builder.AddExpression(new SetExpression(MakeIndexer(ScopeThis, "package"), OpSetLiteral, MakeLiteral(rule.GetPackage()), di));
54
55 builder.AddExpression(new ImportDefaultTemplatesExpression());
56
57 builder.AddExpression(new OwnedExpression(rule.GetExpression()));
58
59 ConfigItem::Ptr dependencyItem = builder.Compile();
60 dependencyItem->Register();
61
62 return true;
63 }
64
EvaluateApplyRule(const Checkable::Ptr & checkable,const ApplyRule & rule)65 bool Dependency::EvaluateApplyRule(const Checkable::Ptr& checkable, const ApplyRule& rule)
66 {
67 DebugInfo di = rule.GetDebugInfo();
68
69 std::ostringstream msgbuf;
70 msgbuf << "Evaluating 'apply' rule (" << di << ")";
71 CONTEXT(msgbuf.str());
72
73 Host::Ptr host;
74 Service::Ptr service;
75 tie(host, service) = GetHostService(checkable);
76
77 ScriptFrame frame(true);
78 if (rule.GetScope())
79 rule.GetScope()->CopyTo(frame.Locals);
80 frame.Locals->Set("host", host);
81 if (service)
82 frame.Locals->Set("service", service);
83
84 Value vinstances;
85
86 if (rule.GetFTerm()) {
87 try {
88 vinstances = rule.GetFTerm()->Evaluate(frame);
89 } catch (const std::exception&) {
90 /* Silently ignore errors here and assume there are no instances. */
91 return false;
92 }
93 } else {
94 vinstances = new Array({ "" });
95 }
96
97 bool match = false;
98
99 if (vinstances.IsObjectType<Array>()) {
100 if (!rule.GetFVVar().IsEmpty())
101 BOOST_THROW_EXCEPTION(ScriptError("Dictionary iterator requires value to be a dictionary.", di));
102
103 Array::Ptr arr = vinstances;
104
105 ObjectLock olock(arr);
106 for (const Value& instance : arr) {
107 String name = rule.GetName();
108
109 if (!rule.GetFKVar().IsEmpty()) {
110 frame.Locals->Set(rule.GetFKVar(), instance);
111 name += instance;
112 }
113
114 if (EvaluateApplyRuleInstance(checkable, name, frame, rule))
115 match = true;
116 }
117 } else if (vinstances.IsObjectType<Dictionary>()) {
118 if (rule.GetFVVar().IsEmpty())
119 BOOST_THROW_EXCEPTION(ScriptError("Array iterator requires value to be an array.", di));
120
121 Dictionary::Ptr dict = vinstances;
122
123 for (const String& key : dict->GetKeys()) {
124 frame.Locals->Set(rule.GetFKVar(), key);
125 frame.Locals->Set(rule.GetFVVar(), dict->Get(key));
126
127 if (EvaluateApplyRuleInstance(checkable, rule.GetName() + key, frame, rule))
128 match = true;
129 }
130 }
131
132 return match;
133 }
134
EvaluateApplyRules(const Host::Ptr & host)135 void Dependency::EvaluateApplyRules(const Host::Ptr& host)
136 {
137 CONTEXT("Evaluating 'apply' rules for host '" + host->GetName() + "'");
138
139 for (ApplyRule& rule : ApplyRule::GetRules("Dependency")) {
140 if (rule.GetTargetType() != "Host")
141 continue;
142
143 if (EvaluateApplyRule(host, rule))
144 rule.AddMatch();
145 }
146 }
147
EvaluateApplyRules(const Service::Ptr & service)148 void Dependency::EvaluateApplyRules(const Service::Ptr& service)
149 {
150 CONTEXT("Evaluating 'apply' rules for service '" + service->GetName() + "'");
151
152 for (ApplyRule& rule : ApplyRule::GetRules("Dependency")) {
153 if (rule.GetTargetType() != "Service")
154 continue;
155
156 if (EvaluateApplyRule(service, rule))
157 rule.AddMatch();
158 }
159 }
160