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netdata/aclk/aclk_query.c

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// SPDX-License-Identifier: GPL-3.0-or-later
#include "aclk_query.h"
#include "aclk_stats.h"
#include "aclk_tx_msgs.h"
#define ACLK_QUERY_THREAD_NAME "ACLK_Query"
#define WEB_HDR_ACCEPT_ENC "Accept-Encoding:"
pthread_cond_t query_cond_wait = PTHREAD_COND_INITIALIZER;
pthread_mutex_t query_lock_wait = PTHREAD_MUTEX_INITIALIZER;
#define QUERY_THREAD_LOCK pthread_mutex_lock(&query_lock_wait)
#define QUERY_THREAD_UNLOCK pthread_mutex_unlock(&query_lock_wait)
static usec_t aclk_web_api_v1_request(RRDHOST *host, struct web_client *w, char *url)
{
usec_t t;
t = now_monotonic_high_precision_usec();
w->response.code = web_client_api_request_v1(host, w, url);
t = now_monotonic_high_precision_usec() - t;
if (aclk_stats_enabled) {
ACLK_STATS_LOCK;
aclk_metrics_per_sample.cloud_q_process_total += t;
aclk_metrics_per_sample.cloud_q_process_count++;
if (aclk_metrics_per_sample.cloud_q_process_max < t)
aclk_metrics_per_sample.cloud_q_process_max = t;
ACLK_STATS_UNLOCK;
}
return t;
}
static RRDHOST *node_id_2_rrdhost(const char *node_id)
{
int res;
uuid_t node_id_bin, host_id_bin;
RRDHOST *host = find_host_by_node_id((char *)node_id);
if (host)
return host;
char host_id[UUID_STR_LEN];
if (uuid_parse(node_id, node_id_bin)) {
error("Couldn't parse UUID %s", node_id);
return NULL;
}
if ((res = get_host_id(&node_id_bin, &host_id_bin))) {
error("node not found rc=%d", res);
return NULL;
}
uuid_unparse_lower(host_id_bin, host_id);
return rrdhost_find_by_guid(host_id);
}
#define NODE_ID_QUERY "/node/"
// TODO this function should be quarantied and written nicely
// lots of skeletons from initial ACLK Legacy impl.
// quick and dirty from the start
static int http_api_v2(struct aclk_query_thread *query_thr, aclk_query_t query)
{
int retval = 0;
usec_t t;
BUFFER *local_buffer = NULL;
BUFFER *log_buffer = buffer_create(NETDATA_WEB_REQUEST_URL_SIZE);
RRDHOST *query_host = localhost;
#ifdef NETDATA_WITH_ZLIB
int z_ret;
BUFFER *z_buffer = buffer_create(NETDATA_WEB_RESPONSE_INITIAL_SIZE);
char *start, *end;
#endif
struct web_client *w = (struct web_client *)callocz(1, sizeof(struct web_client));
w->response.data = buffer_create(NETDATA_WEB_RESPONSE_INITIAL_SIZE);
w->response.header = buffer_create(NETDATA_WEB_RESPONSE_HEADER_SIZE);
w->response.header_output = buffer_create(NETDATA_WEB_RESPONSE_HEADER_SIZE);
strcpy(w->origin, "*"); // Simulate web_client_create_on_fd()
w->cookie1[0] = 0; // Simulate web_client_create_on_fd()
w->cookie2[0] = 0; // Simulate web_client_create_on_fd()
w->acl = 0x1f;
buffer_strcat(log_buffer, query->data.http_api_v2.query);
size_t size = 0;
size_t sent = 0;
w->tv_in = query->created_tv;
now_realtime_timeval(&w->tv_ready);
if (query->timeout) {
int in_queue = (int) (dt_usec(&w->tv_in, &w->tv_ready) / 1000);
if (in_queue > query->timeout) {
log_access("QUERY CANCELED: QUEUE TIME EXCEEDED %d ms (LIMIT %d ms)", in_queue, query->timeout);
retval = 1;
w->response.code = HTTP_RESP_BACKEND_FETCH_FAILED;
aclk_http_msg_v2_err(query_thr->client, query->callback_topic, query->msg_id, w->response.code, CLOUD_EC_SND_TIMEOUT, CLOUD_EMSG_SND_TIMEOUT, NULL, 0);
goto cleanup;
}
}
RRDHOST *temp_host = NULL;
if (!strncmp(query->data.http_api_v2.query, NODE_ID_QUERY, strlen(NODE_ID_QUERY))) {
char *node_uuid = query->data.http_api_v2.query + strlen(NODE_ID_QUERY);
char nodeid[UUID_STR_LEN];
if (strlen(node_uuid) < (UUID_STR_LEN - 1)) {
error_report(CLOUD_EMSG_MALFORMED_NODE_ID);
retval = 1;
w->response.code = 404;
aclk_http_msg_v2_err(query_thr->client, query->callback_topic, query->msg_id, w->response.code, CLOUD_EC_MALFORMED_NODE_ID, CLOUD_EMSG_MALFORMED_NODE_ID, NULL, 0);
goto cleanup;
}
strncpyz(nodeid, node_uuid, UUID_STR_LEN - 1);
query_host = node_id_2_rrdhost(nodeid);
if (!query_host) {
temp_host = sql_create_host_by_uuid(nodeid);
if (!temp_host) {
error_report("Host with node_id \"%s\" not found! Returning 404 to Cloud!", nodeid);
retval = 1;
w->response.code = 404;
aclk_http_msg_v2_err(query_thr->client, query->callback_topic, query->msg_id, w->response.code, CLOUD_EC_NODE_NOT_FOUND, CLOUD_EMSG_NODE_NOT_FOUND, NULL, 0);
goto cleanup;
}
}
}
char *mysep = strchr(query->data.http_api_v2.query, '?');
if (mysep) {
url_decode_r(w->decoded_query_string, mysep, NETDATA_WEB_REQUEST_URL_SIZE + 1);
*mysep = '\0';
} else
url_decode_r(w->decoded_query_string, query->data.http_api_v2.query, NETDATA_WEB_REQUEST_URL_SIZE + 1);
mysep = strrchr(query->data.http_api_v2.query, '/');
if (aclk_stats_enabled) {
ACLK_STATS_LOCK;
int stat_idx = aclk_cloud_req_http_type_to_idx(mysep ? mysep + 1 : "other");
aclk_metrics_per_sample.cloud_req_http_by_type[stat_idx]++;
ACLK_STATS_UNLOCK;
}
// execute the query
t = aclk_web_api_v1_request(query_host ? query_host : temp_host, w, mysep ? mysep + 1 : "noop");
free_temporary_host(temp_host);
size = (w->mode == WEB_CLIENT_MODE_FILECOPY) ? w->response.rlen : w->response.data->len;
sent = size;
#ifdef NETDATA_WITH_ZLIB
// check if gzip encoding can and should be used
if ((start = strstr((char *)query->data.http_api_v2.payload, WEB_HDR_ACCEPT_ENC))) {
start += strlen(WEB_HDR_ACCEPT_ENC);
end = strstr(start, "\x0D\x0A");
start = strstr(start, "gzip");
if (start && start < end) {
w->response.zstream.zalloc = Z_NULL;
w->response.zstream.zfree = Z_NULL;
w->response.zstream.opaque = Z_NULL;
if(deflateInit2(&w->response.zstream, web_gzip_level, Z_DEFLATED, 15 + 16, 8, web_gzip_strategy) == Z_OK) {
w->response.zinitialized = 1;
w->response.zoutput = 1;
} else
error("Failed to initialize zlib. Proceeding without compression.");
}
}
if (w->response.data->len && w->response.zinitialized) {
w->response.zstream.next_in = (Bytef *)w->response.data->buffer;
w->response.zstream.avail_in = w->response.data->len;
do {
w->response.zstream.avail_out = NETDATA_WEB_RESPONSE_ZLIB_CHUNK_SIZE;
w->response.zstream.next_out = w->response.zbuffer;
z_ret = deflate(&w->response.zstream, Z_FINISH);
if(z_ret < 0) {
if(w->response.zstream.msg)
error("Error compressing body. ZLIB error: \"%s\"", w->response.zstream.msg);
else
error("Unknown error during zlib compression.");
retval = 1;
w->response.code = 500;
aclk_http_msg_v2_err(query_thr->client, query->callback_topic, query->msg_id, w->response.code, CLOUD_EC_ZLIB_ERROR, CLOUD_EMSG_ZLIB_ERROR, NULL, 0);
goto cleanup;
}
int bytes_to_cpy = NETDATA_WEB_RESPONSE_ZLIB_CHUNK_SIZE - w->response.zstream.avail_out;
buffer_need_bytes(z_buffer, bytes_to_cpy);
memcpy(&z_buffer->buffer[z_buffer->len], w->response.zbuffer, bytes_to_cpy);
z_buffer->len += bytes_to_cpy;
} while(z_ret != Z_STREAM_END);
// so that web_client_build_http_header
// puts correct content length into header
buffer_free(w->response.data);
w->response.data = z_buffer;
z_buffer = NULL;
}
#endif
w->response.data->date = w->tv_ready.tv_sec;
web_client_build_http_header(w);
local_buffer = buffer_create(NETDATA_WEB_RESPONSE_INITIAL_SIZE);
local_buffer->contenttype = CT_APPLICATION_JSON;
buffer_strcat(local_buffer, w->response.header_output->buffer);
if (w->response.data->len) {
#ifdef NETDATA_WITH_ZLIB
if (w->response.zinitialized) {
buffer_need_bytes(local_buffer, w->response.data->len);
memcpy(&local_buffer->buffer[local_buffer->len], w->response.data->buffer, w->response.data->len);
local_buffer->len += w->response.data->len;
sent = sent - size + w->response.data->len;
} else {
#endif
buffer_strcat(local_buffer, w->response.data->buffer);
#ifdef NETDATA_WITH_ZLIB
}
#endif
}
// send msg.
aclk_http_msg_v2(query_thr->client, query->callback_topic, query->msg_id, t, query->created, w->response.code, local_buffer->buffer, local_buffer->len);
struct timeval tv;
cleanup:
now_realtime_timeval(&tv);
log_access("%llu: %d '[ACLK]:%d' '%s' (sent/all = %zu/%zu bytes %0.0f%%, prep/sent/total = %0.2f/%0.2f/%0.2f ms) %d '%s'",
w->id
, gettid()
, query_thr->idx
, "DATA"
, sent
, size
, size > sent ? -(((size - sent) / (double)size) * 100.0) : ((size > 0) ? (((sent - size ) / (double)size) * 100.0) : 0.0)
, dt_usec(&w->tv_ready, &w->tv_in) / 1000.0
, dt_usec(&tv, &w->tv_ready) / 1000.0
, dt_usec(&tv, &w->tv_in) / 1000.0
, w->response.code
, strip_control_characters((char *)buffer_tostring(log_buffer))
);
#ifdef NETDATA_WITH_ZLIB
if(w->response.zinitialized)
deflateEnd(&w->response.zstream);
buffer_free(z_buffer);
#endif
buffer_free(w->response.data);
buffer_free(w->response.header);
buffer_free(w->response.header_output);
freez(w);
buffer_free(local_buffer);
buffer_free(log_buffer);
return retval;
}
static int send_bin_msg(struct aclk_query_thread *query_thr, aclk_query_t query)
{
// this will be simplified when legacy support is removed
aclk_send_bin_message_subtopic_pid(query_thr->client, query->data.bin_payload.payload, query->data.bin_payload.size, query->data.bin_payload.topic, query->data.bin_payload.msg_name);
return 0;
}
const char *aclk_query_get_name(aclk_query_type_t qt)
{
switch (qt) {
case HTTP_API_V2: return "http_api_request_v2";
case REGISTER_NODE: return "register_node";
case NODE_STATE_UPDATE: return "node_state_update";
case CHART_DIMS_UPDATE: return "chart_and_dim_update";
case CHART_CONFIG_UPDATED: return "chart_config_updated";
case CHART_RESET: return "reset_chart_messages";
case RETENTION_UPDATED: return "update_retention_info";
case UPDATE_NODE_INFO: return "update_node_info";
case ALARM_LOG_HEALTH: return "alarm_log_health";
case ALARM_PROVIDE_CFG: return "provide_alarm_config";
case ALARM_SNAPSHOT: return "alarm_snapshot";
case UPDATE_NODE_COLLECTORS: return "update_node_collectors";
case PROTO_BIN_MESSAGE: return "generic_binary_proto_message";
default:
error_report("Unknown query type used %d", (int) qt);
return "unknown";
}
}
static void aclk_query_process_msg(struct aclk_query_thread *query_thr, aclk_query_t query)
{
if (query->type == UNKNOWN || query->type >= ACLK_QUERY_TYPE_COUNT) {
error_report("Unknown query in query queue. %u", query->type);
aclk_query_free(query);
return;
}
worker_is_busy(query->type);
if (query->type == HTTP_API_V2) {
debug(D_ACLK, "Processing Queued Message of type: \"http_api_request_v2\"");
http_api_v2(query_thr, query);
} else {
debug(D_ACLK, "Processing Queued Message of type: \"%s\"", query->data.bin_payload.msg_name);
send_bin_msg(query_thr, query);
}
if (aclk_stats_enabled) {
ACLK_STATS_LOCK;
aclk_metrics_per_sample.queries_dispatched++;
aclk_queries_per_thread[query_thr->idx]++;
aclk_metrics_per_sample.queries_per_type[query->type]++;
ACLK_STATS_UNLOCK;
}
aclk_query_free(query);
worker_is_idle();
}
/* Processes messages from queue. Compete for work with other threads
*/
int aclk_query_process_msgs(struct aclk_query_thread *query_thr)
{
aclk_query_t query;
while ((query = aclk_queue_pop()))
aclk_query_process_msg(query_thr, query);
return 0;
}
static void worker_aclk_register(void) {
worker_register("ACLKQUERY");
for (int i = 1; i < ACLK_QUERY_TYPE_COUNT; i++) {
worker_register_job_name(i, aclk_query_get_name(i));
}
}
/**
* Main query processing thread
*/
void *aclk_query_main_thread(void *ptr)
{
worker_aclk_register();
struct aclk_query_thread *query_thr = ptr;
while (!netdata_exit) {
aclk_query_process_msgs(query_thr);
worker_is_idle();
QUERY_THREAD_LOCK;
if (unlikely(pthread_cond_wait(&query_cond_wait, &query_lock_wait)))
sleep_usec(USEC_PER_SEC * 1);
QUERY_THREAD_UNLOCK;
}
worker_unregister();
return NULL;
}
#define TASK_LEN_MAX 22
void aclk_query_threads_start(struct aclk_query_threads *query_threads, mqtt_wss_client client)
{
info("Starting %d query threads.", query_threads->count);
char thread_name[TASK_LEN_MAX];
query_threads->thread_list = callocz(query_threads->count, sizeof(struct aclk_query_thread));
for (int i = 0; i < query_threads->count; i++) {
query_threads->thread_list[i].idx = i; //thread needs to know its index for statistics
if(unlikely(snprintfz(thread_name, TASK_LEN_MAX, "%s_%d", ACLK_QUERY_THREAD_NAME, i) < 0))
error("snprintf encoding error");
netdata_thread_create(
&query_threads->thread_list[i].thread, thread_name, NETDATA_THREAD_OPTION_JOINABLE, aclk_query_main_thread,
&query_threads->thread_list[i]);
query_threads->thread_list[i].client = client;
}
}
void aclk_query_threads_cleanup(struct aclk_query_threads *query_threads)
{
if (query_threads && query_threads->thread_list) {
for (int i = 0; i < query_threads->count; i++) {
netdata_thread_join(query_threads->thread_list[i].thread, NULL);
}
freez(query_threads->thread_list);
}
aclk_queue_lock();
aclk_queue_flush();
}
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