vnfs/VESreporting_vLB5.0/vpp_measurement_reporter.c

   1
   2 /*************************************************************************//**
   3  *
   4  * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
   5  *
   6  * Licensed under the Apache License, Version 2.0 (the "License");
   7  * you may not use this file except in compliance with the License.
   8  * You may obtain a copy of the License at
   9  *        http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  *
  17  ****************************************************************************/
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <unistd.h>
  22 #include <string.h>
  23 #include <sys/time.h>
  24 #include <math.h>
  25
  26 #include "evel.h"
  27
  28 #define BUFSIZE 128
  29 #define READ_INTERVAL 10
  30
  31 typedef struct dummy_vpp_metrics_struct {
  32   int bytes_in;
  33   int bytes_out;
  34   int packets_in;
  35   int packets_out;
  36 } vpp_metrics_struct;
  37
  38 void read_vpp_metrics(vpp_metrics_struct *, char *);
  39
  40 unsigned long long epoch_start = 0;
  41
  42 int main(int argc, char** argv)
  43 {
  44   EVEL_ERR_CODES evel_rc = EVEL_SUCCESS;
  45   EVENT_MEASUREMENT* vpp_m = NULL;
  46   EVENT_HEADER* vpp_m_header = NULL;
  47   int bytes_in_this_round;
  48   int bytes_out_this_round;
  49   int packets_in_this_round;
  50   int packets_out_this_round;
  51   vpp_metrics_struct* last_vpp_metrics = malloc(sizeof(vpp_metrics_struct));
  52   vpp_metrics_struct* curr_vpp_metrics = malloc(sizeof(vpp_metrics_struct));
  53   struct timeval time_val;
  54   //time_t start_epoch;
  55   //time_t last_epoch;
  56   char hostname[BUFSIZE];
  57   char* fqdn = argv[1];
  58   int port = atoi(argv[2]);
  59   char* vnic = argv[3];
  60   MEASUREMENT_VNIC_PERFORMANCE * vnic_performance = NULL;
  61
  62   printf("\nVector Packet Processing (VPP) measurement collection\n");
  63   fflush(stdout);
  64
  65   if (argc != 4)
  66   {
  67     fprintf(stderr, "Usage: %s <FQDN>|<IP address> <port> <interface>\n", argv[0]);
  68     exit(-1);
  69   }
  70
  71   /**************************************************************************/
  72   /* Initialize                                                             */
  73   /**************************************************************************/
  74   if(evel_initialize(fqdn,                         /* FQDN                  */
  75                      port,                         /* Port                  */
  76                      NULL,                         /* optional path         */
  77                      NULL,                         /* optional topic        */
  78                      0,                            /* HTTPS?                */
  79                      "",                           /* Username              */
  80                      "",                           /* Password              */
  81                      EVEL_SOURCE_VIRTUAL_MACHINE,  /* Source type           */
  82                      "vLoadBalancer",              /* Role                  */
  83                      1))                           /* Verbosity             */
  84   {
  85     fprintf(stderr, "\nFailed to initialize the EVEL library!!!\n");
  86     exit(-1);
  87   }
  88   else
  89   {
  90     printf("\nInitialization completed\n");
  91   }
  92
  93   gethostname(hostname, BUFSIZE);
  94   memset(last_vpp_metrics, 0, sizeof(vpp_metrics_struct));
  95   read_vpp_metrics(last_vpp_metrics, vnic);
  96   gettimeofday(&time_val, NULL);
  97   epoch_start = time_val.tv_sec * 1000000 + time_val.tv_usec;
  98   sleep(READ_INTERVAL);
  99
 100   /***************************************************************************/
 101   /* Collect metrics from the VNIC                                           */
 102   /***************************************************************************/
 103   while(1) {
 104     // Read the number of vDNSs currently active
 105     int active_dns = 0;
 106     FILE* fd = fopen("active_dns.txt", "r");
 107     while(!feof(fd)) {
 108       if(fscanf(fd, "%d", &active_dns) != 1) /* Avoid infinite loops if the file doesn't contain exactly one number */
 109         break;
 110     }
 111
 112     if(fclose(fd))  {
 113       printf("Error when closing file\n");
 114       return 1;
 115     }
 116
 117     memset(curr_vpp_metrics, 0, sizeof(vpp_metrics_struct));
 118     read_vpp_metrics(curr_vpp_metrics, vnic);
 119
 120     if(active_dns > 0 && (curr_vpp_metrics->bytes_in - last_vpp_metrics->bytes_in > 0)) {
 121       bytes_in_this_round = (int) round((curr_vpp_metrics->bytes_in - last_vpp_metrics->bytes_in) / active_dns);
 122     }
 123     else {
 124       bytes_in_this_round = 0;
 125     }
 126     if(active_dns > 0 && (curr_vpp_metrics->bytes_out - last_vpp_metrics->bytes_out > 0)) {
 127       bytes_out_this_round = (int) round((curr_vpp_metrics->bytes_out - last_vpp_metrics->bytes_out) / active_dns);
 128     }
 129     else {
 130       bytes_out_this_round = 0;
 131     }
 132     if(active_dns > 0 && (curr_vpp_metrics->packets_in - last_vpp_metrics->packets_in > 0)) {
 133       packets_in_this_round = (int) round((curr_vpp_metrics->packets_in - last_vpp_metrics->packets_in) / active_dns);
 134     }
 135     else {
 136       packets_in_this_round = 0;
 137     }
 138     if(active_dns > 0 && (curr_vpp_metrics->packets_out - last_vpp_metrics->packets_out > 0)) {
 139       packets_out_this_round = (int) round((curr_vpp_metrics->packets_out - last_vpp_metrics->packets_out) / active_dns);
 140     }
 141     else {
 142       packets_out_this_round = 0;
 143     }
 144
 145     vpp_m = evel_new_measurement(READ_INTERVAL);
 146     vnic_performance = (MEASUREMENT_VNIC_PERFORMANCE *)evel_measurement_new_vnic_performance("eth0", "true");
 147     evel_meas_vnic_performance_add(vpp_m, vnic_performance);
 148
 149     if(vpp_m != NULL) {
 150       printf("New measurement report created...\n");
 151
 152       evel_vnic_performance_rx_total_pkt_acc_set(vnic_performance, packets_in_this_round);
 153       evel_vnic_performance_tx_total_pkt_acc_set(vnic_performance, packets_out_this_round);
 154
 155       evel_vnic_performance_rx_octets_acc_set(vnic_performance, bytes_in_this_round);
 156       evel_vnic_performance_tx_octets_acc_set(vnic_performance, bytes_out_this_round);
 157
 158       /***************************************************************************/
 159       /* Set parameters in the MEASUREMENT header packet                         */
 160       /***************************************************************************/
 161       struct timeval tv_now;
 162       gettimeofday(&tv_now, NULL);
 163       unsigned long long epoch_now = tv_now.tv_usec + 1000000 * tv_now.tv_sec;
 164
 165       //last_epoch = start_epoch + READ_INTERVAL * 1000000;
 166       vpp_m_header = (EVENT_HEADER *)vpp_m;
 167       //vpp_m_header->start_epoch_microsec = start_epoch;
 168       //vpp_m_header->last_epoch_microsec = last_epoch;
 169       evel_start_epoch_set(&vpp_m->header, epoch_start);
 170       evel_last_epoch_set(&vpp_m->header, epoch_now);
 171       epoch_start = epoch_now;
 172
 173       strcpy(vpp_m_header->reporting_entity_id.value, "No UUID available");
 174       strcpy(vpp_m_header->reporting_entity_name, hostname);
 175       evel_rc = evel_post_event(vpp_m_header);
 176
 177       if(evel_rc == EVEL_SUCCESS) {
 178         printf("Measurement report correctly sent to the collector!\n");
 179       }
 180       else {
 181         printf("Post failed %d (%s)\n", evel_rc, evel_error_string());
 182       }
 183     }
 184     else {
 185       printf("New measurement report failed (%s)\n", evel_error_string());
 186     }
 187
 188     last_vpp_metrics->bytes_in = curr_vpp_metrics->bytes_in;
 189     last_vpp_metrics->bytes_out = curr_vpp_metrics->bytes_out;
 190     last_vpp_metrics->packets_in = curr_vpp_metrics->packets_in;
 191     last_vpp_metrics->packets_out = curr_vpp_metrics->packets_out;
 192     //gettimeofday(&time_val, NULL);
 193     //start_epoch = time_val.tv_sec * 1000000 + time_val.tv_usec;
 194
 195     sleep(READ_INTERVAL);
 196   }
 197
 198   /***************************************************************************/
 199   /* Terminate                                                               */
 200   /***************************************************************************/
 201   sleep(1);
 202   evel_free_measurement(vpp_m);
 203   free(last_vpp_metrics);
 204   free(curr_vpp_metrics);
 205   evel_terminate();
 206   printf("Terminated\n");
 207
 208   return 0;
 209 }
 210
 211 void read_vpp_metrics(vpp_metrics_struct *vpp_metrics, char *vnic) {
 212   // Define an array of char that contains the parameters of the unix 'cut' command
 213   char* params[] = {"-f3", "-f11", "-f4", "-f12"};
 214   // Define the unix command to execute in order to read metrics from the vNIC
 215   char* cmd_prefix = "sudo cat /proc/net/dev | grep \"";
 216   char* cmd_mid = "\" | tr -s \' \' | cut -d\' \' ";
 217   char cmd[BUFSIZE];
 218   // Define other variables
 219   char buf[BUFSIZE];            /* buffer used to store VPP metrics     */
 220   int temp[] = {0, 0, 0, 0};    /* temp array that contains VPP values  */
 221   FILE *fp;                     /* file descriptor to pipe cmd to shell */
 222   int i;
 223
 224   for(i = 0; i < 4; i++) {
 225     // Clear buffers
 226     memset(buf, 0, BUFSIZE);
 227     memset(cmd, 0, BUFSIZE);
 228     // Build shell command to read metrics from the vNIC
 229     strcat(cmd, cmd_prefix);
 230     strcat(cmd, vnic);
 231     strcat(cmd, cmd_mid);
 232     strcat(cmd, params[i]);
 233
 234     // Open a pipe and read VPP values
 235     if ((fp = popen(cmd, "r")) == NULL) {
 236       printf("Error opening pipe!\n");
 237       return;
 238     }
 239
 240     while (fgets(buf, BUFSIZE, fp) != NULL);
 241     temp[i] = atoi(buf);
 242
 243     if(pclose(fp))  {
 244       printf("Command not found or exited with error status\n");
 245       return;
 246     }
 247   }
 248
 249   // Store metrics read from the vNIC in the struct passed from the main function
 250   vpp_metrics->bytes_in = temp[0];
 251   vpp_metrics->bytes_out = temp[1];
 252   vpp_metrics->packets_in = temp[2];
 253   vpp_metrics->packets_out = temp[3];
 254 }