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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
// SPDX-License-Identifier: GPL-3.0-or-later
#include "pubsub.h"
/**
* Initialize Pub/Sub connector instance
*
* @param instance an instance data structure.
* @return Returns 0 on success, 1 on failure.
*/
int init_pubsub_instance(struct instance *instance)
{
instance->worker = pubsub_connector_worker;
instance->start_batch_formatting = NULL;
instance->start_host_formatting = format_host_labels_json_plaintext;
instance->start_chart_formatting = NULL;
if (EXPORTING_OPTIONS_DATA_SOURCE(instance->config.options) == EXPORTING_SOURCE_DATA_AS_COLLECTED)
instance->metric_formatting = format_dimension_collected_json_plaintext;
else
instance->metric_formatting = format_dimension_stored_json_plaintext;
instance->end_chart_formatting = NULL;
instance->end_host_formatting = flush_host_labels;
instance->end_batch_formatting = NULL;
instance->prepare_header = NULL;
instance->check_response = NULL;
instance->buffer = (void *)buffer_create(0);
if (!instance->buffer) {
error("EXPORTING: cannot create buffer for Pub/Sub exporting connector instance %s", instance->config.name);
return 1;
}
uv_mutex_init(&instance->mutex);
uv_cond_init(&instance->cond_var);
struct pubsub_specific_data *connector_specific_data = callocz(1, sizeof(struct pubsub_specific_data));
instance->connector_specific_data = (void *)connector_specific_data;
struct pubsub_specific_config *connector_specific_config =
(struct pubsub_specific_config *)instance->config.connector_specific_config;
char error_message[ERROR_LINE_MAX + 1] = "";
if (pubsub_init(
(void *)connector_specific_data, error_message, instance->config.destination,
connector_specific_config->credentials_file, connector_specific_config->project_id,
connector_specific_config->topic_id)) {
error(
"EXPORTING: Cannot initialize a Pub/Sub publisher for instance %s: %s",
instance->config.name, error_message);
return 1;
}
return 0;
}
/**
* Clean a PubSub connector instance
*
* @param instance an instance data structure.
*/
void clean_pubsub_instance(struct instance *instance)
{
info("EXPORTING: cleaning up instance %s ...", instance->config.name);
struct pubsub_specific_data *connector_specific_data =
(struct pubsub_specific_data *)instance->connector_specific_data;
pubsub_cleanup(connector_specific_data);
freez(connector_specific_data);
buffer_free(instance->buffer);
struct pubsub_specific_config *connector_specific_config =
(struct pubsub_specific_config *)instance->config.connector_specific_config;
freez(connector_specific_config->credentials_file);
freez(connector_specific_config->project_id);
freez(connector_specific_config->topic_id);
freez(connector_specific_config);
info("EXPORTING: instance %s exited", instance->config.name);
instance->exited = 1;
return;
}
/**
* Pub/Sub connector worker
*
* Runs in a separate thread for every instance.
*
* @param instance_p an instance data structure.
*/
void pubsub_connector_worker(void *instance_p)
{
struct instance *instance = (struct instance *)instance_p;
struct pubsub_specific_config *connector_specific_config = instance->config.connector_specific_config;
struct pubsub_specific_data *connector_specific_data = instance->connector_specific_data;
while (!instance->engine->exit) {
struct stats *stats = &instance->stats;
char error_message[ERROR_LINE_MAX + 1] = "";
uv_mutex_lock(&instance->mutex);
while (!instance->data_is_ready)
uv_cond_wait(&instance->cond_var, &instance->mutex);
instance->data_is_ready = 0;
if (unlikely(instance->engine->exit)) {
uv_mutex_unlock(&instance->mutex);
break;
}
// reset the monitoring chart counters
stats->received_bytes =
stats->sent_bytes =
stats->sent_metrics =
stats->lost_metrics =
stats->receptions =
stats->transmission_successes =
stats->transmission_failures =
stats->data_lost_events =
stats->lost_bytes =
stats->reconnects = 0;
BUFFER *buffer = (BUFFER *)instance->buffer;
size_t buffer_len = buffer_strlen(buffer);
stats->buffered_bytes = buffer_len;
if (pubsub_add_message(instance->connector_specific_data, (char *)buffer_tostring(buffer))) {
error("EXPORTING: Instance %s: Cannot add data to a message", instance->config.name);
stats->data_lost_events++;
stats->lost_metrics += stats->buffered_metrics;
stats->lost_bytes += buffer_len;
goto cleanup;
}
debug(
D_EXPORTING, "EXPORTING: pubsub_publish(): project = %s, topic = %s, buffer = %zu",
connector_specific_config->project_id, connector_specific_config->topic_id, buffer_len);
if (pubsub_publish((void *)connector_specific_data, error_message, stats->buffered_metrics, buffer_len)) {
error("EXPORTING: Instance: %s: Cannot publish a message: %s", instance->config.name, error_message);
stats->transmission_failures++;
stats->data_lost_events++;
stats->lost_metrics += stats->buffered_metrics;
stats->lost_bytes += buffer_len;
goto cleanup;
}
stats->sent_bytes = buffer_len;
stats->transmission_successes++;
size_t sent_metrics = 0, lost_metrics = 0, sent_bytes = 0, lost_bytes = 0;
if (unlikely(pubsub_get_result(
connector_specific_data, error_message, &sent_metrics, &sent_bytes, &lost_metrics, &lost_bytes))) {
// oops! we couldn't send (all or some of the) data
error("EXPORTING: %s", error_message);
error(
"EXPORTING: failed to write data to service '%s'. Willing to write %zu bytes, wrote %zu bytes.",
instance->config.destination, lost_bytes, sent_bytes);
stats->transmission_failures++;
stats->data_lost_events++;
stats->lost_metrics += lost_metrics;
stats->lost_bytes += lost_bytes;
} else {
stats->receptions++;
stats->sent_metrics = sent_metrics;
}
cleanup:
send_internal_metrics(instance);
buffer_flush(buffer);
stats->buffered_metrics = 0;
uv_mutex_unlock(&instance->mutex);
#ifdef UNIT_TESTING
return;
#endif
}
clean_pubsub_instance(instance);
}
|
