1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
#include "PrometheusMetricsWriter.h"
#include <IO/WriteHelpers.h>
#include <Common/StatusInfo.h>
#include <regex> /// TODO: this library is harmful.
#include <algorithm>
namespace
{
template <typename T>
void writeOutLine(DB::WriteBuffer & wb, T && val)
{
DB::writeText(std::forward<T>(val), wb);
DB::writeChar('\n', wb);
}
template <typename T, typename... TArgs>
void writeOutLine(DB::WriteBuffer & wb, T && val, TArgs &&... args)
{
DB::writeText(std::forward<T>(val), wb);
DB::writeChar(' ', wb);
writeOutLine(wb, std::forward<TArgs>(args)...);
}
/// Returns false if name is not valid
bool replaceInvalidChars(std::string & metric_name)
{
/// dirty solution
metric_name = std::regex_replace(metric_name, std::regex("[^a-zA-Z0-9_:]"), "_");
metric_name = std::regex_replace(metric_name, std::regex("^[^a-zA-Z]*"), "");
return !metric_name.empty();
}
void convertHelpToSingleLine(std::string & help)
{
std::replace(help.begin(), help.end(), '\n', ' ');
}
}
namespace DB
{
PrometheusMetricsWriter::PrometheusMetricsWriter(
const Poco::Util::AbstractConfiguration & config, const std::string & config_name,
const AsynchronousMetrics & async_metrics_)
: async_metrics(async_metrics_)
, send_events(config.getBool(config_name + ".events", true))
, send_metrics(config.getBool(config_name + ".metrics", true))
, send_asynchronous_metrics(config.getBool(config_name + ".asynchronous_metrics", true))
, send_status_info(config.getBool(config_name + ".status_info", true))
{
}
void PrometheusMetricsWriter::write(WriteBuffer & wb) const
{
if (send_events)
{
for (ProfileEvents::Event i = ProfileEvents::Event(0), end = ProfileEvents::end(); i < end; ++i)
{
const auto counter = ProfileEvents::global_counters[i].load(std::memory_order_relaxed);
std::string metric_name{ProfileEvents::getName(static_cast<ProfileEvents::Event>(i))};
std::string metric_doc{ProfileEvents::getDocumentation(static_cast<ProfileEvents::Event>(i))};
convertHelpToSingleLine(metric_doc);
if (!replaceInvalidChars(metric_name))
continue;
std::string key{profile_events_prefix + metric_name};
writeOutLine(wb, "# HELP", key, metric_doc);
writeOutLine(wb, "# TYPE", key, "counter");
writeOutLine(wb, key, counter);
}
}
if (send_metrics)
{
for (size_t i = 0, end = CurrentMetrics::end(); i < end; ++i)
{
const auto value = CurrentMetrics::values[i].load(std::memory_order_relaxed);
std::string metric_name{CurrentMetrics::getName(static_cast<CurrentMetrics::Metric>(i))};
std::string metric_doc{CurrentMetrics::getDocumentation(static_cast<CurrentMetrics::Metric>(i))};
convertHelpToSingleLine(metric_doc);
if (!replaceInvalidChars(metric_name))
continue;
std::string key{current_metrics_prefix + metric_name};
writeOutLine(wb, "# HELP", key, metric_doc);
writeOutLine(wb, "# TYPE", key, "gauge");
writeOutLine(wb, key, value);
}
}
if (send_asynchronous_metrics)
{
auto async_metrics_values = async_metrics.getValues();
for (const auto & name_value : async_metrics_values)
{
std::string key{asynchronous_metrics_prefix + name_value.first};
if (!replaceInvalidChars(key))
continue;
auto value = name_value.second;
std::string metric_doc{value.documentation};
convertHelpToSingleLine(metric_doc);
// TODO: add HELP section? asynchronous_metrics contains only key and value
writeOutLine(wb, "# HELP", key, metric_doc);
writeOutLine(wb, "# TYPE", key, "gauge");
writeOutLine(wb, key, value.value);
}
}
if (send_status_info)
{
for (size_t i = 0, end = CurrentStatusInfo::end(); i < end; ++i)
{
std::lock_guard lock(CurrentStatusInfo::locks[static_cast<CurrentStatusInfo::Status>(i)]);
std::string metric_name{CurrentStatusInfo::getName(static_cast<CurrentStatusInfo::Status>(i))};
std::string metric_doc{CurrentStatusInfo::getDocumentation(static_cast<CurrentStatusInfo::Status>(i))};
convertHelpToSingleLine(metric_doc);
if (!replaceInvalidChars(metric_name))
continue;
std::string key{current_status_prefix + metric_name};
writeOutLine(wb, "# HELP", key, metric_doc);
writeOutLine(wb, "# TYPE", key, "gauge");
for (const auto & value: CurrentStatusInfo::values[i])
{
for (const auto & enum_value: CurrentStatusInfo::getAllPossibleValues(static_cast<CurrentStatusInfo::Status>(i)))
{
DB::writeText(key, wb);
DB::writeChar('{', wb);
DB::writeText(key, wb);
DB::writeChar('=', wb);
writeDoubleQuotedString(enum_value.first, wb);
DB::writeText(",name=", wb);
writeDoubleQuotedString(value.first, wb);
DB::writeText("} ", wb);
DB::writeText(value.second == enum_value.second, wb);
DB::writeChar('\n', wb);
}
}
}
}
}
}
|
