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cloudwatch_api.c
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cloudwatch_api.c
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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Fluent Bit
* ==========
* Copyright (C) 2015-2024 The Fluent Bit Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <fluent-bit/flb_compat.h>
#include <fluent-bit/flb_info.h>
#include <fluent-bit/flb_output.h>
#include <fluent-bit/flb_utils.h>
#include <fluent-bit/flb_slist.h>
#include <fluent-bit/flb_time.h>
#include <fluent-bit/flb_pack.h>
#include <fluent-bit/flb_macros.h>
#include <fluent-bit/flb_config_map.h>
#include <fluent-bit/flb_output_plugin.h>
#include <fluent-bit/flb_log_event_decoder.h>
#include <fluent-bit/flb_sds.h>
#include <fluent-bit/flb_aws_credentials.h>
#include <fluent-bit/flb_aws_util.h>
#include <fluent-bit/flb_mem.h>
#include <fluent-bit/flb_info.h>
#include <fluent-bit/flb_http_client.h>
#include <fluent-bit/flb_utils.h>
#include <fluent-bit/flb_intermediate_metric.h>
#include <fluent-bit/flb_metrics.h>
#include <monkey/mk_core.h>
#include <msgpack.h>
#include <string.h>
#include <stdio.h>
#ifndef FLB_SYSTEM_WINDOWS
#include <unistd.h>
#endif
#include "cloudwatch_api.h"
#define ERR_CODE_ALREADY_EXISTS "ResourceAlreadyExistsException"
#define ERR_CODE_NOT_FOUND "ResourceNotFoundException"
#define AMZN_REQUEST_ID_HEADER "x-amzn-RequestId"
#define ONE_DAY_IN_MILLISECONDS 86400000
#define FOUR_HOURS_IN_SECONDS 14400
static struct flb_aws_header create_group_header = {
.key = "X-Amz-Target",
.key_len = 12,
.val = "Logs_20140328.CreateLogGroup",
.val_len = 28,
};
static struct flb_aws_header put_retention_policy_header = {
.key = "X-Amz-Target",
.key_len = 12,
.val = "Logs_20140328.PutRetentionPolicy",
.val_len = 32,
};
static struct flb_aws_header create_stream_header = {
.key = "X-Amz-Target",
.key_len = 12,
.val = "Logs_20140328.CreateLogStream",
.val_len = 29,
};
static struct flb_aws_header put_log_events_header[] = {
{
.key = "X-Amz-Target",
.key_len = 12,
.val = "Logs_20140328.PutLogEvents",
.val_len = 26,
},
{
.key = "x-amzn-logs-format",
.key_len = 18,
.val = "",
.val_len = 0,
},
};
int plugin_under_test()
{
if (getenv("FLB_CLOUDWATCH_PLUGIN_UNDER_TEST") != NULL) {
return FLB_TRUE;
}
return FLB_FALSE;
}
char *mock_error_response(char *error_env_var)
{
char *err_val = NULL;
char *error = NULL;
int len = 0;
err_val = getenv(error_env_var);
if (err_val != NULL && strlen(err_val) > 0) {
error = flb_malloc(strlen(err_val) + sizeof(char));
if (error == NULL) {
flb_errno();
return NULL;
}
len = strlen(err_val);
memcpy(error, err_val, len);
error[len] = '\0';
return error;
}
return NULL;
}
struct flb_http_client *mock_http_call(char *error_env_var, char *api)
{
/* create an http client so that we can set the response */
struct flb_http_client *c = NULL;
char *error = mock_error_response(error_env_var);
c = flb_calloc(1, sizeof(struct flb_http_client));
if (!c) {
flb_errno();
flb_free(error);
return NULL;
}
mk_list_init(&c->headers);
if (error != NULL) {
c->resp.status = 400;
/* resp.data is freed on destroy, payload is supposed to reference it */
c->resp.data = error;
c->resp.payload = c->resp.data;
c->resp.payload_size = strlen(error);
}
else {
c->resp.status = 200;
c->resp.payload = "";
c->resp.payload_size = 0;
if (strcmp(api, "PutLogEvents") == 0) {
/* mocked success response */
c->resp.payload = "{\"nextSequenceToken\": \""
"49536701251539826331025683274032969384950891766572122113\"}";
c->resp.payload_size = strlen(c->resp.payload);
}
else {
c->resp.payload = "";
c->resp.payload_size = 0;
}
}
return c;
}
int compare_events(const void *a_arg, const void *b_arg)
{
struct cw_event *r_a = (struct cw_event *) a_arg;
struct cw_event *r_b = (struct cw_event *) b_arg;
if (r_a->timestamp < r_b->timestamp) {
return -1;
}
else if (r_a->timestamp == r_b->timestamp) {
return 0;
}
else {
return 1;
}
}
static inline int try_to_write(char *buf, int *off, size_t left,
const char *str, size_t str_len)
{
if (str_len <= 0){
str_len = strlen(str);
}
if (left <= *off+str_len) {
return FLB_FALSE;
}
memcpy(buf+*off, str, str_len);
*off += str_len;
return FLB_TRUE;
}
/*
* Writes the "header" for a put log events payload
*/
static int init_put_payload(struct flb_cloudwatch *ctx, struct cw_flush *buf,
struct log_stream *stream, int *offset)
{
if (!try_to_write(buf->out_buf, offset, buf->out_buf_size,
"{\"logGroupName\":\"", 17)) {
goto error;
}
if (!try_to_write(buf->out_buf, offset, buf->out_buf_size,
stream->group, 0)) {
goto error;
}
if (!try_to_write(buf->out_buf, offset, buf->out_buf_size,
"\",\"logStreamName\":\"", 19)) {
goto error;
}
if (!try_to_write(buf->out_buf, offset, buf->out_buf_size,
stream->name, 0)) {
goto error;
}
if (!try_to_write(buf->out_buf, offset, buf->out_buf_size,
"\",", 2)) {
goto error;
}
if (!try_to_write(buf->out_buf, offset, buf->out_buf_size,
"\"logEvents\":[", 13)) {
goto error;
}
return 0;
error:
return -1;
}
/*
* Writes a log event to the output buffer
*/
static int write_event(struct flb_cloudwatch *ctx, struct cw_flush *buf,
struct cw_event *event, int *offset)
{
char ts[50];
if (!snprintf(ts, 50, "%llu", event->timestamp)) {
goto error;
}
if (!try_to_write(buf->out_buf, offset, buf->out_buf_size,
"{\"timestamp\":", 13)) {
goto error;
}
if (!try_to_write(buf->out_buf, offset, buf->out_buf_size,
ts, 0)) {
goto error;
}
if (!try_to_write(buf->out_buf, offset, buf->out_buf_size,
",\"message\":\"", 12)) {
goto error;
}
if (!try_to_write(buf->out_buf, offset, buf->out_buf_size,
event->json, event->len)) {
goto error;
}
if (!try_to_write(buf->out_buf, offset, buf->out_buf_size,
"\"}", 2)) {
goto error;
}
return 0;
error:
return -1;
}
/* Terminates a PutLogEvents payload */
static int end_put_payload(struct flb_cloudwatch *ctx, struct cw_flush *buf,
int *offset)
{
if (!try_to_write(buf->out_buf, offset, buf->out_buf_size,
"]}", 2)) {
return -1;
}
buf->out_buf[*offset] = '\0';
return 0;
}
static unsigned long long stream_time_span(struct log_stream *stream,
struct cw_event *event)
{
if (stream->oldest_event == 0 || stream->newest_event == 0) {
return 0;
}
if (stream->oldest_event > event->timestamp) {
return stream->newest_event - event->timestamp;
}
else if (stream->newest_event < event->timestamp) {
return event->timestamp - stream->oldest_event;
}
return stream->newest_event - stream->oldest_event;
}
/* returns FLB_TRUE if time span is less than 24 hours, FLB_FALSE if greater */
static int check_stream_time_span(struct log_stream *stream,
struct cw_event *event)
{
unsigned long long span = stream_time_span(stream, event);
if (span < ONE_DAY_IN_MILLISECONDS) {
return FLB_TRUE;
}
return FLB_FALSE;
}
/* sets the oldest_event and newest_event fields */
static void set_stream_time_span(struct log_stream *stream, struct cw_event *event)
{
if (stream->oldest_event == 0 || stream->oldest_event > event->timestamp) {
stream->oldest_event = event->timestamp;
}
if (stream->newest_event == 0 || stream->newest_event < event->timestamp) {
stream->newest_event = event->timestamp;
}
}
/*
* Truncate log if needed. If truncated, only `written` is modified
* returns FLB_TRUE if truncated
*/
static int truncate_log(const struct flb_cloudwatch *ctx, const char *log_buffer,
size_t *written) {
size_t trailing_backslash_count = 0;
if (*written > MAX_EVENT_LEN) {
flb_plg_warn(ctx->ins, "[size=%zu] Truncating event which is larger than "
"max size allowed by CloudWatch", *written);
*written = MAX_EVENT_LEN;
/* remove trailing unescaped backslash if inadvertently synthesized */
while (trailing_backslash_count < *written &&
log_buffer[(*written - 1) - trailing_backslash_count] == '\\') {
trailing_backslash_count++;
}
if (trailing_backslash_count % 2 == 1) {
/* odd number of trailing backslashes, remove unpaired backslash */
(*written)--;
}
return FLB_TRUE;
}
return FLB_FALSE;
}
/*
* Processes the msgpack object
* -1 = failure, record not added
* 0 = success, record added
* 1 = we ran out of space, send and retry
* 2 = record could not be processed, discard it
* Returns 0 on success, -1 on general errors,
* and 1 if we ran out of space to write the event
* which means a send must occur
*/
int process_event(struct flb_cloudwatch *ctx, struct cw_flush *buf,
const msgpack_object *obj, struct flb_time *tms)
{
size_t written;
int ret;
size_t size;
int offset = 0;
struct cw_event *event;
char *tmp_buf_ptr;
tmp_buf_ptr = buf->tmp_buf + buf->tmp_buf_offset;
ret = flb_msgpack_to_json(tmp_buf_ptr,
buf->tmp_buf_size - buf->tmp_buf_offset,
obj);
if (ret <= 0) {
/*
* failure to write to buffer,
* which means we ran out of space, and must send the logs
*/
return 1;
}
written = (size_t) ret;
/* Discard empty messages (written == 2 means '""') */
if (written <= 2) {
flb_plg_debug(ctx->ins, "Found empty log message");
return 2;
}
/* the json string must be escaped, unless the log_key option is used */
if (ctx->log_key == NULL) {
/*
* check if event_buf is initialized and big enough
* If all chars need to be hex encoded (impossible), 6x space would be
* needed
*/
size = written * 6;
if (buf->event_buf == NULL || buf->event_buf_size < size) {
flb_free(buf->event_buf);
buf->event_buf = flb_malloc(size);
buf->event_buf_size = size;
if (buf->event_buf == NULL) {
flb_errno();
return -1;
}
}
offset = 0;
if (!flb_utils_write_str(buf->event_buf, &offset, size,
tmp_buf_ptr, written)) {
return -1;
}
written = offset;
tmp_buf_ptr = buf->tmp_buf + buf->tmp_buf_offset;
if ((buf->tmp_buf_size - buf->tmp_buf_offset) < written) {
/* not enough space, send logs */
return 1;
}
/* truncate log, if needed */
truncate_log(ctx, buf->event_buf, &written);
/* copy serialized json to tmp_buf */
if (!strncpy(tmp_buf_ptr, buf->event_buf, written)) {
return -1;
}
}
else {
/*
* flb_msgpack_to_json will encase the value in quotes
* We don't want that for log_key, so we ignore the first
* and last character
*/
written -= 2;
tmp_buf_ptr++; /* pass over the opening quote */
buf->tmp_buf_offset++; /* advance tmp_buf past opening quote */
/* truncate log, if needed */
truncate_log(ctx, tmp_buf_ptr, &written);
}
/* add log to events list */
buf->tmp_buf_offset += written;
event = &buf->events[buf->event_index];
event->json = tmp_buf_ptr;
event->len = written;
event->timestamp = (unsigned long long) (tms->tm.tv_sec * 1000ull +
tms->tm.tv_nsec/1000000);
return 0;
}
/* Resets or inits a cw_flush struct */
void reset_flush_buf(struct flb_cloudwatch *ctx, struct cw_flush *buf) {
buf->event_index = 0;
buf->tmp_buf_offset = 0;
buf->event_index = 0;
buf->data_size = PUT_LOG_EVENTS_HEADER_LEN + PUT_LOG_EVENTS_FOOTER_LEN;
if (buf->current_stream != NULL) {
buf->data_size += strlen(buf->current_stream->name);
buf->data_size += strlen(buf->current_stream->group);
}
}
/* sorts events, constructs a put payload, and then sends */
int send_log_events(struct flb_cloudwatch *ctx, struct cw_flush *buf) {
int ret;
int offset;
int i;
struct cw_event *event;
if (buf->event_index <= 0) {
return 0;
}
/* events must be sorted by timestamp in a put payload */
qsort(buf->events, buf->event_index, sizeof(struct cw_event), compare_events);
retry:
buf->current_stream->newest_event = 0;
buf->current_stream->oldest_event = 0;
offset = 0;
ret = init_put_payload(ctx, buf, buf->current_stream, &offset);
if (ret < 0) {
flb_plg_error(ctx->ins, "Failed to initialize PutLogEvents payload");
return -1;
}
for (i = 0; i < buf->event_index; i++) {
event = &buf->events[i];
ret = write_event(ctx, buf, event, &offset);
if (ret < 0) {
flb_plg_error(ctx->ins, "Failed to write log event %d to "
"payload buffer", i);
return -1;
}
if (i != (buf->event_index - 1)) {
if (!try_to_write(buf->out_buf, &offset, buf->out_buf_size,
",", 1)) {
flb_plg_error(ctx->ins, "Could not terminate log event with ','");
return -1;
}
}
}
ret = end_put_payload(ctx, buf, &offset);
if (ret < 0) {
flb_plg_error(ctx->ins, "Could not complete PutLogEvents payload");
return -1;
}
flb_plg_debug(ctx->ins, "cloudwatch:PutLogEvents: events=%d, payload=%d bytes", i, offset);
ret = put_log_events(ctx, buf, buf->current_stream, (size_t) offset);
if (ret < 0) {
flb_plg_error(ctx->ins, "Failed to send log events");
return -1;
}
else if (ret > 0) {
goto retry;
}
return 0;
}
/*
* Processes the msgpack object, sends the current batch if needed
* -1 = failure, event not added
* 0 = success, event added
* 1 = event been skipped
* Returns 0 on success, -1 on general errors,
* and 1 if we found a empty event or a large event.
*/
int add_event(struct flb_cloudwatch *ctx, struct cw_flush *buf,
struct log_stream *stream,
const msgpack_object *obj, struct flb_time *tms)
{
int ret;
struct cw_event *event;
int retry_add = FLB_FALSE;
int event_bytes = 0;
if (buf->event_index > 0 && buf->current_stream != stream) {
/* we already have events for a different stream, send them first */
retry_add = FLB_TRUE;
goto send;
}
retry_add_event:
buf->current_stream = stream;
retry_add = FLB_FALSE;
if (buf->event_index == 0) {
/* init */
reset_flush_buf(ctx, buf);
}
ret = process_event(ctx, buf, obj, tms);
if (ret < 0) {
return -1;
}
else if (ret == 1) {
if (buf->event_index <= 0) {
/* somehow the record was larger than our entire request buffer */
flb_plg_warn(ctx->ins, "Discarding massive log record");
return 1; /* discard this record and return to caller */
}
/* send logs and then retry the add */
retry_add = FLB_TRUE;
goto send;
}
else if (ret == 2) {
/*
* discard this record and return to caller
* only happens for empty records in this plugin
*/
return 1;
}
event = &buf->events[buf->event_index];
event_bytes = event->len + PUT_LOG_EVENTS_PER_EVENT_LEN;
if (check_stream_time_span(stream, event) == FLB_FALSE) {
/* do not send this event */
retry_add = FLB_TRUE;
goto send;
}
if ((buf->data_size + event_bytes) > PUT_LOG_EVENTS_PAYLOAD_SIZE) {
if (buf->event_index <= 0) {
/* somehow the record was larger than our entire request buffer */
flb_plg_warn(ctx->ins, "Discarding massive log record");
return 0; /* discard this record and return to caller */
}
/* do not send this event */
retry_add = FLB_TRUE;
goto send;
}
buf->data_size += event_bytes;
set_stream_time_span(stream, event);
buf->event_index++;
if (buf->event_index == MAX_EVENTS_PER_PUT) {
goto send;
}
/* send is not needed yet, return to caller */
return 0;
send:
ret = send_log_events(ctx, buf);
reset_flush_buf(ctx, buf);
if (ret < 0) {
return -1;
}
if (retry_add == FLB_TRUE) {
goto retry_add_event;
}
return 0;
}
int should_add_to_emf(struct flb_intermediate_metric *an_item)
{
/* Valid for cpu plugin */
if (strncmp(an_item->key.via.str.ptr, "cpu_", 4) == 0
|| strncmp(an_item->key.via.str.ptr, "user_p", 6) == 0
|| strncmp(an_item->key.via.str.ptr, "system_p", 8) == 0) {
return 1;
}
/* Valid for mem plugin */
if (strncmp(an_item->key.via.str.ptr, "Mem.total", 9) == 0
|| strncmp(an_item->key.via.str.ptr, "Mem.used", 8) == 0
|| strncmp(an_item->key.via.str.ptr, "Mem.free", 8) == 0
|| strncmp(an_item->key.via.str.ptr, "Swap.total", 10) == 0
|| strncmp(an_item->key.via.str.ptr, "Swap.used", 9) == 0
|| strncmp(an_item->key.via.str.ptr, "Swap.free", 9) == 0) {
return 1;
}
return 0;
}
int pack_emf_payload(struct flb_cloudwatch *ctx,
struct mk_list *flb_intermediate_metrics,
const char *input_plugin,
struct flb_time tms,
msgpack_sbuffer *mp_sbuf,
msgpack_unpacked *mp_result,
msgpack_object *emf_payload)
{
int total_items = mk_list_size(flb_intermediate_metrics) + 1;
struct mk_list *metric_temp;
struct mk_list *metric_head;
struct flb_intermediate_metric *an_item;
msgpack_unpack_return mp_ret;
/* Serialize values into the buffer using msgpack_sbuffer_write */
msgpack_packer mp_pck;
msgpack_packer_init(&mp_pck, mp_sbuf, msgpack_sbuffer_write);
msgpack_pack_map(&mp_pck, total_items);
/* Pack the _aws map */
msgpack_pack_str(&mp_pck, 4);
msgpack_pack_str_body(&mp_pck, "_aws", 4);
msgpack_pack_map(&mp_pck, 2);
msgpack_pack_str(&mp_pck, 9);
msgpack_pack_str_body(&mp_pck, "Timestamp", 9);
msgpack_pack_long_long(&mp_pck, tms.tm.tv_sec * 1000L);
msgpack_pack_str(&mp_pck, 17);
msgpack_pack_str_body(&mp_pck, "CloudWatchMetrics", 17);
msgpack_pack_array(&mp_pck, 1);
msgpack_pack_map(&mp_pck, 3);
msgpack_pack_str(&mp_pck, 9);
msgpack_pack_str_body(&mp_pck, "Namespace", 9);
if (ctx->metric_namespace) {
msgpack_pack_str(&mp_pck, flb_sds_len(ctx->metric_namespace));
msgpack_pack_str_body(&mp_pck, ctx->metric_namespace,
flb_sds_len(ctx->metric_namespace));
}
else {
msgpack_pack_str(&mp_pck, 18);
msgpack_pack_str_body(&mp_pck, "fluent-bit-metrics", 18);
}
msgpack_pack_str(&mp_pck, 10);
msgpack_pack_str_body(&mp_pck, "Dimensions", 10);
struct mk_list *head, *inner_head;
struct flb_split_entry *dimension_list, *entry;
struct mk_list *csv_values;
if (ctx->metric_dimensions) {
msgpack_pack_array(&mp_pck, mk_list_size(ctx->metric_dimensions));
mk_list_foreach(head, ctx->metric_dimensions) {
dimension_list = mk_list_entry(head, struct flb_split_entry, _head);
csv_values = flb_utils_split(dimension_list->value, ',', 256);
msgpack_pack_array(&mp_pck, mk_list_size(csv_values));
mk_list_foreach(inner_head, csv_values) {
entry = mk_list_entry(inner_head, struct flb_split_entry, _head);
msgpack_pack_str(&mp_pck, entry->len);
msgpack_pack_str_body(&mp_pck, entry->value, entry->len);
}
flb_utils_split_free(csv_values);
}
}
else {
msgpack_pack_array(&mp_pck, 0);
}
msgpack_pack_str(&mp_pck, 7);
msgpack_pack_str_body(&mp_pck, "Metrics", 7);
if (strcmp(input_plugin, "cpu") == 0) {
msgpack_pack_array(&mp_pck, 3);
}
else if (strcmp(input_plugin, "mem") == 0) {
msgpack_pack_array(&mp_pck, 6);
}
else {
msgpack_pack_array(&mp_pck, 0);
}
mk_list_foreach_safe(metric_head, metric_temp, flb_intermediate_metrics) {
an_item = mk_list_entry(metric_head, struct flb_intermediate_metric, _head);
if (should_add_to_emf(an_item) == 1) {
msgpack_pack_map(&mp_pck, 2);
msgpack_pack_str(&mp_pck, 4);
msgpack_pack_str_body(&mp_pck, "Name", 4);
msgpack_pack_object(&mp_pck, an_item->key);
msgpack_pack_str(&mp_pck, 4);
msgpack_pack_str_body(&mp_pck, "Unit", 4);
msgpack_pack_str(&mp_pck, strlen(an_item->metric_unit));
msgpack_pack_str_body(&mp_pck, an_item->metric_unit,
strlen(an_item->metric_unit));
}
}
/* Pack the metric values for each record */
mk_list_foreach_safe(metric_head, metric_temp, flb_intermediate_metrics) {
an_item = mk_list_entry(metric_head, struct flb_intermediate_metric, _head);
msgpack_pack_object(&mp_pck, an_item->key);
msgpack_pack_object(&mp_pck, an_item->value);
}
/*
* Deserialize the buffer into msgpack_object instance.
*/
mp_ret = msgpack_unpack_next(mp_result, mp_sbuf->data, mp_sbuf->size, NULL);
if (mp_ret != MSGPACK_UNPACK_SUCCESS) {
flb_plg_error(ctx->ins, "msgpack_unpack returned non-success value %i", mp_ret);
return -1;
}
*emf_payload = mp_result->data;
return 0;
}
static int process_log_events(struct flb_cloudwatch *ctx, const char *input_plugin,
struct cw_flush *buf, flb_sds_t tag,
const char *data, size_t bytes)
{
int i = 0;
size_t map_size;
msgpack_object map;
msgpack_object_kv *kv;
msgpack_object key;
msgpack_object val;
msgpack_unpacked mp_emf_result;
msgpack_object emf_payload;
/* msgpack::sbuffer is a simple buffer implementation. */
msgpack_sbuffer mp_sbuf;
struct log_stream *stream;
char *key_str = NULL;
size_t key_str_size = 0;
int j;
int ret;
int check = FLB_FALSE;
int found = FLB_FALSE;
/* Added for EMF support */
struct flb_intermediate_metric *metric;
struct mk_list *tmp;
struct mk_list *head;
struct flb_intermediate_metric *an_item;
int intermediate_metric_type;
char *intermediate_metric_unit;
struct flb_log_event_decoder log_decoder;
struct flb_log_event log_event;
ret = flb_log_event_decoder_init(&log_decoder, (char *) data, bytes);
if (ret != FLB_EVENT_DECODER_SUCCESS) {
flb_plg_error(ctx->ins,
"Log event decoder initialization error : %d", ret);
return -1;
}
if (strncmp(input_plugin, "cpu", 3) == 0) {
intermediate_metric_type = GAUGE;
intermediate_metric_unit = PERCENT;
}
else if (strncmp(input_plugin, "mem", 3) == 0) {
intermediate_metric_type = GAUGE;
intermediate_metric_unit = BYTES;
}
/* unpack msgpack */
while ((ret = flb_log_event_decoder_next(
&log_decoder,
&log_event)) == FLB_EVENT_DECODER_SUCCESS) {
/* Get the record/map */
map = *log_event.body;
map_size = map.via.map.size;
stream = get_log_stream(ctx, tag, map);
if (!stream) {
flb_plg_debug(ctx->ins, "Couldn't determine log group & stream for record with tag %s", tag);
goto error;
}
if (ctx->log_key) {
key_str = NULL;
key_str_size = 0;
check = FLB_FALSE;
found = FLB_FALSE;
kv = map.via.map.ptr;
for(j=0; j < map_size; j++) {
key = (kv+j)->key;
if (key.type == MSGPACK_OBJECT_BIN) {
key_str = (char *) key.via.bin.ptr;
key_str_size = key.via.bin.size;
check = FLB_TRUE;
}
if (key.type == MSGPACK_OBJECT_STR) {
key_str = (char *) key.via.str.ptr;
key_str_size = key.via.str.size;
check = FLB_TRUE;
}
if (check == FLB_TRUE) {
if (strncmp(ctx->log_key, key_str, key_str_size) == 0) {
found = FLB_TRUE;
val = (kv+j)->val;
ret = add_event(ctx, buf, stream, &val,
&log_event.timestamp);
if (ret < 0 ) {
goto error;
}
}
}
}
if (found == FLB_FALSE) {
flb_plg_error(ctx->ins, "Could not find log_key '%s' in record",
ctx->log_key);
}
if (ret == 0) {
i++;
}
continue;
}
if (strncmp(input_plugin, "cpu", 3) == 0
|| strncmp(input_plugin, "mem", 3) == 0) {
/* Added for EMF support: Construct a list */
struct mk_list flb_intermediate_metrics;
mk_list_init(&flb_intermediate_metrics);
kv = map.via.map.ptr;
/*
* Iterate through the record map, extract intermediate metric data,
* and add to the list.
*/
for (i = 0; i < map_size; i++) {
metric = flb_calloc(1, sizeof(struct flb_intermediate_metric));
if (!metric) {
goto error;
}
metric->key = (kv + i)->key;
metric->value = (kv + i)->val;
metric->metric_type = intermediate_metric_type;
metric->metric_unit = intermediate_metric_unit;
metric->timestamp = log_event.timestamp;
mk_list_add(&metric->_head, &flb_intermediate_metrics);
}
/* The msgpack object is only valid during the lifetime of the
* sbuffer & the unpacked result.
*/
msgpack_sbuffer_init(&mp_sbuf);
msgpack_unpacked_init(&mp_emf_result);
ret = pack_emf_payload(ctx,
&flb_intermediate_metrics,
input_plugin,
log_event.timestamp,
&mp_sbuf,
&mp_emf_result,
&emf_payload);
/* free the intermediate metric list */
mk_list_foreach_safe(head, tmp, &flb_intermediate_metrics) {
an_item = mk_list_entry(head, struct flb_intermediate_metric, _head);
mk_list_del(&an_item->_head);
flb_free(an_item);
}
if (ret != 0) {
flb_plg_error(ctx->ins, "Failed to convert EMF metrics to msgpack object. ret=%i", ret);
msgpack_unpacked_destroy(&mp_emf_result);
msgpack_sbuffer_destroy(&mp_sbuf);
goto error;
}
ret = add_event(ctx, buf, stream, &emf_payload,
&log_event.timestamp);
msgpack_unpacked_destroy(&mp_emf_result);
msgpack_sbuffer_destroy(&mp_sbuf);
} else {
ret = add_event(ctx, buf, stream, &map,
&log_event.timestamp);
}
if (ret < 0 ) {
goto error;
}
if (ret == 0) {
i++;
}
}
flb_log_event_decoder_destroy(&log_decoder);
return i;
error:
flb_log_event_decoder_destroy(&log_decoder);
return -1;
}
static int process_metric_events(struct flb_cloudwatch *ctx, const char *input_plugin,
struct cw_flush *buf, flb_sds_t tag,
const char *data, size_t bytes)
{
int i = 0;
int ret;
msgpack_object map;
msgpack_unpacked mp_emf_result;
struct log_stream *stream;
size_t off = 0;
struct cmt *cmt;
char *mp_buf = NULL;