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// SPDX-License-Identifier: GPL-3.0-or-later
//
// Created by Christopher on 11/12/18.
//
#include "health_cmdapi.h"
/**
* Free Silencers
*
* Clean the silencer structure
*
* @param t is the structure that will be cleaned.
*/
void free_silencers(SILENCER *t) {
if (!t) return;
if (t->next) free_silencers(t->next);
netdata_log_debug(D_HEALTH, "HEALTH command API: Freeing silencer %s:%s:%s:%s", t->alarms,
t->charts, t->contexts, t->hosts);
simple_pattern_free(t->alarms_pattern);
simple_pattern_free(t->charts_pattern);
simple_pattern_free(t->contexts_pattern);
simple_pattern_free(t->hosts_pattern);
freez(t->alarms);
freez(t->charts);
freez(t->contexts);
freez(t->hosts);
freez(t);
return;
}
/**
* Silencers to JSON Entry
*
* Fill the buffer with the other values given.
*
* @param wb a pointer to the output buffer
* @param var the json variable
* @param val the json value
* @param hasprev has it a previous value?
*
* @return
*/
int health_silencers2json_entry(BUFFER *wb, char* var, char* val, int hasprev) {
if (val) {
buffer_sprintf(wb, "%s\n\t\t\t\"%s\": \"%s\"", (hasprev)?",":"", var, val);
return 1;
} else {
return hasprev;
}
}
/**
* Silencer to JSON
*
* Write the silencer values using JSON format inside a buffer.
*
* @param wb is the buffer to write the silencers.
*/
void health_silencers2json(BUFFER *wb) {
buffer_sprintf(wb, "{\n\t\"all\": %s,"
"\n\t\"type\": \"%s\","
"\n\t\"silencers\": [",
(silencers->all_alarms)?"true":"false",
(silencers->stype == STYPE_NONE)?"None":((silencers->stype == STYPE_DISABLE_ALARMS)?"DISABLE":"SILENCE"));
SILENCER *silencer;
int i = 0, j = 0;
for(silencer = silencers->silencers; silencer ; silencer = silencer->next) {
if(likely(i)) buffer_strcat(wb, ",");
buffer_strcat(wb, "\n\t\t{");
j=health_silencers2json_entry(wb, HEALTH_ALARM_KEY, silencer->alarms, j);
j=health_silencers2json_entry(wb, HEALTH_CHART_KEY, silencer->charts, j);
j=health_silencers2json_entry(wb, HEALTH_CONTEXT_KEY, silencer->contexts, j);
j=health_silencers2json_entry(wb, HEALTH_HOST_KEY, silencer->hosts, j);
j=0;
buffer_strcat(wb, "\n\t\t}");
i++;
}
if(likely(i)) buffer_strcat(wb, "\n\t");
buffer_strcat(wb, "]\n}\n");
}
/**
* Silencer to FILE
*
* Write the silencer buffer to a file.
* @param wb
*/
void health_silencers2file(BUFFER *wb) {
if (wb->len == 0) return;
FILE *fd = fopen(silencers_filename, "wb");
if(fd) {
size_t written = (size_t)fprintf(fd, "%s", wb->buffer) ;
if (written == wb->len ) {
netdata_log_info("Silencer changes written to %s", silencers_filename);
}
fclose(fd);
return;
}
netdata_log_error("Silencer changes could not be written to %s. Error %s", silencers_filename, strerror(errno));
}
/**
* Request V1 MGMT Health
*
* Function called by api to management the health.
*
* @param host main structure with client information!
* @param w is the structure with all information of the client request.
* @param url is the url that netdata is working
*
* @return It returns 200 on success and another code otherwise.
*/
int web_client_api_request_v1_mgmt_health(RRDHOST *host, struct web_client *w, char *url) {
int ret;
(void) host;
BUFFER *wb = w->response.data;
buffer_flush(wb);
wb->content_type = CT_TEXT_PLAIN;
buffer_flush(w->response.data);
//Local instance of the silencer
SILENCER *silencer = NULL;
int config_changed = 1;
if (!w->auth_bearer_token) {
buffer_strcat(wb, HEALTH_CMDAPI_MSG_AUTHERROR);
ret = HTTP_RESP_FORBIDDEN;
} else {
netdata_log_debug(D_HEALTH, "HEALTH command API: Comparing secret '%s' to '%s'", w->auth_bearer_token, api_secret);
if (strcmp(w->auth_bearer_token, api_secret)) {
buffer_strcat(wb, HEALTH_CMDAPI_MSG_AUTHERROR);
ret = HTTP_RESP_FORBIDDEN;
} else {
while (url) {
char *value = strsep_skip_consecutive_separators(&url, "&");
if (!value || !*value) continue;
char *key = strsep_skip_consecutive_separators(&value, "=");
if (!key || !*key) continue;
if (!value || !*value) continue;
netdata_log_debug(D_WEB_CLIENT, "%llu: API v1 health query param '%s' with value '%s'", w->id, key, value);
// name and value are now the parameters
if (!strcmp(key, "cmd")) {
if (!strcmp(value, HEALTH_CMDAPI_CMD_SILENCEALL)) {
silencers->all_alarms = 1;
silencers->stype = STYPE_SILENCE_NOTIFICATIONS;
buffer_strcat(wb, HEALTH_CMDAPI_MSG_SILENCEALL);
} else if (!strcmp(value, HEALTH_CMDAPI_CMD_DISABLEALL)) {
silencers->all_alarms = 1;
silencers->stype = STYPE_DISABLE_ALARMS;
buffer_strcat(wb, HEALTH_CMDAPI_MSG_DISABLEALL);
} else if (!strcmp(value, HEALTH_CMDAPI_CMD_SILENCE)) {
silencers->stype = STYPE_SILENCE_NOTIFICATIONS;
buffer_strcat(wb, HEALTH_CMDAPI_MSG_SILENCE);
} else if (!strcmp(value, HEALTH_CMDAPI_CMD_DISABLE)) {
silencers->stype = STYPE_DISABLE_ALARMS;
buffer_strcat(wb, HEALTH_CMDAPI_MSG_DISABLE);
} else if (!strcmp(value, HEALTH_CMDAPI_CMD_RESET)) {
silencers->all_alarms = 0;
silencers->stype = STYPE_NONE;
free_silencers(silencers->silencers);
silencers->silencers = NULL;
buffer_strcat(wb, HEALTH_CMDAPI_MSG_RESET);
} else if (!strcmp(value, HEALTH_CMDAPI_CMD_LIST)) {
w->response.data->content_type = CT_APPLICATION_JSON;
health_silencers2json(wb);
config_changed=0;
}
} else {
silencer = health_silencers_addparam(silencer, key, value);
}
}
if (likely(silencer)) {
health_silencers_add(silencer);
buffer_strcat(wb, HEALTH_CMDAPI_MSG_ADDED);
if (silencers->stype == STYPE_NONE) {
buffer_strcat(wb, HEALTH_CMDAPI_MSG_STYPEWARNING);
}
}
if (unlikely(silencers->stype != STYPE_NONE && !silencers->all_alarms && !silencers->silencers)) {
buffer_strcat(wb, HEALTH_CMDAPI_MSG_NOSELECTORWARNING);
}
ret = HTTP_RESP_OK;
}
}
w->response.data = wb;
buffer_no_cacheable(w->response.data);
if (ret == HTTP_RESP_OK && config_changed) {
BUFFER *jsonb = buffer_create(200, &netdata_buffers_statistics.buffers_health);
health_silencers2json(jsonb);
health_silencers2file(jsonb);
buffer_free(jsonb);
}
return ret;
}
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