vnfs/VESreporting_vLB/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 int main(int argc, char** argv)
  41 {
  42   EVEL_ERR_CODES evel_rc = EVEL_SUCCESS;
  43   EVENT_MEASUREMENT* vpp_m = NULL;
  44   EVENT_HEADER* vpp_m_header = NULL;
  45   int bytes_in_this_round;
  46   int bytes_out_this_round;
  47   int packets_in_this_round;
  48   int packets_out_this_round;
  49   vpp_metrics_struct* last_vpp_metrics = malloc(sizeof(vpp_metrics_struct));
  50   vpp_metrics_struct* curr_vpp_metrics = malloc(sizeof(vpp_metrics_struct));
  51   struct timeval time_val;
  52   time_t start_epoch;
  53   time_t last_epoch;
  54   char hostname[BUFSIZE];
  55   char* fqdn = argv[1];
  56   int port = atoi(argv[2]);
  57   char* vnic = argv[3];
  58
  59   printf("\nVector Packet Processing (VPP) measurement collection\n");
  60   fflush(stdout);
  61
  62   if (argc != 4)
  63   {
  64     fprintf(stderr, "Usage: %s <FQDN>|<IP address> <port> <interface>\n", argv[0]);
  65     exit(-1);
  66   }
  67
  68   /**************************************************************************/
  69   /* Initialize                                                             */
  70   /**************************************************************************/
  71   if(evel_initialize(fqdn,                         /* FQDN                  */
  72                      port,                         /* Port                  */
  73                      NULL,                         /* optional path         */
  74                      NULL,                         /* optional topic        */
  75                      0,                            /* HTTPS?                */
  76                      "",                           /* Username              */
  77                      "",                           /* Password              */
  78                      EVEL_SOURCE_VIRTUAL_MACHINE,  /* Source type           */
  79                      "vLoadBalancer",              /* Role                  */
  80                      1))                           /* Verbosity             */
  81   {
  82     fprintf(stderr, "\nFailed to initialize the EVEL library!!!\n");
  83     exit(-1);
  84   }
  85   else
  86   {
  87     printf("\nInitialization completed\n");
  88   }
  89
  90   gethostname(hostname, BUFSIZE);
  91   memset(last_vpp_metrics, 0, sizeof(vpp_metrics_struct));
  92   read_vpp_metrics(last_vpp_metrics, vnic);
  93   gettimeofday(&time_val, NULL);
  94   start_epoch = time_val.tv_sec * 1000000 + time_val.tv_usec;
  95   sleep(READ_INTERVAL);
  96
  97   /***************************************************************************/
  98   /* Collect metrics from the VNIC                                           */
  99   /***************************************************************************/
 100   while(1) {
 101     // Read the number of vDNSs currently active
 102     int active_dns = 0;
 103     FILE* fd = fopen("active_dns.txt", "r");
 104     while(!feof(fd)) {
 105       if(fscanf(fd, "%d", &active_dns) != 1) /* Avoid infinite loops if the file doesn't contain exactly one number */
 106         break;
 107     }
 108
 109     if(fclose(fd))  {
 110       printf("Error when closing file\n");
 111       return 1;
 112     }
 113
 114     memset(curr_vpp_metrics, 0, sizeof(vpp_metrics_struct));
 115     read_vpp_metrics(curr_vpp_metrics, vnic);
 116
 117     if(active_dns > 0 && (curr_vpp_metrics->bytes_in - last_vpp_metrics->bytes_in > 0)) {
 118       bytes_in_this_round = (int) round((curr_vpp_metrics->bytes_in - last_vpp_metrics->bytes_in) / active_dns);
 119     }
 120     else {
 121       bytes_in_this_round = 0;
 122     }
 123     if(active_dns > 0 && (curr_vpp_metrics->bytes_out - last_vpp_metrics->bytes_out > 0)) {
 124       bytes_out_this_round = (int) round((curr_vpp_metrics->bytes_out - last_vpp_metrics->bytes_out) / active_dns);
 125     }
 126     else {
 127       bytes_out_this_round = 0;
 128     }
 129     if(active_dns > 0 && (curr_vpp_metrics->packets_in - last_vpp_metrics->packets_in > 0)) {
 130       packets_in_this_round = (int) round((curr_vpp_metrics->packets_in - last_vpp_metrics->packets_in) / active_dns);
 131     }
 132     else {
 133       packets_in_this_round = 0;
 134     }
 135     if(active_dns > 0 && (curr_vpp_metrics->packets_out - last_vpp_metrics->packets_out > 0)) {
 136       packets_out_this_round = (int) round((curr_vpp_metrics->packets_out - last_vpp_metrics->packets_out) / active_dns);
 137     }
 138     else {
 139       packets_out_this_round = 0;
 140     }
 141
 142     vpp_m = evel_new_measurement(READ_INTERVAL);
 143
 144     if(vpp_m != NULL) {
 145       printf("New measurement report created...\n");
 146       evel_measurement_vnic_use_add(vpp_m,              /* Pointer to the measurement      */
 147                                      vnic,              /* ASCII string with the vNIC's ID */
 148                     packets_in_this_round,              /* Packets received                */
 149                    packets_out_this_round,              /* Packets transmitted             */
 150                                         0,              /* Broadcast packets received      */
 151                                         0,              /* Broadcast packets transmitted   */
 152                       bytes_in_this_round,              /* Total bytes received            */
 153                      bytes_out_this_round,              /* Total bytes transmitted         */
 154                                         0,              /* Multicast packets received      */
 155                                         0,              /* Multicast packets transmitted   */
 156                                         0,              /* Unicast packets received        */
 157                                         0);             /* Unicast packets transmitted     */
 158
 159       /***************************************************************************/
 160       /* Set parameters in the MEASUREMENT header packet                         */
 161       /***************************************************************************/
 162       last_epoch = start_epoch + READ_INTERVAL * 1000000;
 163       vpp_m_header = (EVENT_HEADER *)vpp_m;
 164       vpp_m_header->start_epoch_microsec = start_epoch;
 165       vpp_m_header->last_epoch_microsec = last_epoch;
 166       strcpy(vpp_m_header->reporting_entity_id.value, "No UUID available");
 167       strcpy(vpp_m_header->reporting_entity_name, hostname);
 168       evel_rc = evel_post_event(vpp_m_header);
 169
 170       if(evel_rc == EVEL_SUCCESS) {
 171         printf("Measurement report correctly sent to the collector!\n");
 172       }
 173       else {
 174         printf("Post failed %d (%s)\n", evel_rc, evel_error_string());
 175       }
 176     }
 177     else {
 178       printf("New measurement report failed (%s)\n", evel_error_string());
 179     }
 180
 181     last_vpp_metrics->bytes_in = curr_vpp_metrics->bytes_in;
 182     last_vpp_metrics->bytes_out = curr_vpp_metrics->bytes_out;
 183     last_vpp_metrics->packets_in = curr_vpp_metrics->packets_in;
 184     last_vpp_metrics->packets_out = curr_vpp_metrics->packets_out;
 185     gettimeofday(&time_val, NULL);
 186     start_epoch = time_val.tv_sec * 1000000 + time_val.tv_usec;
 187
 188     sleep(READ_INTERVAL);
 189   }
 190
 191   /***************************************************************************/
 192   /* Terminate                                                               */
 193   /***************************************************************************/
 194   sleep(1);
 195   free(last_vpp_metrics);
 196   free(curr_vpp_metrics);
 197   evel_terminate();
 198   printf("Terminated\n");
 199
 200   return 0;
 201 }
 202
 203 void read_vpp_metrics(vpp_metrics_struct *vpp_metrics, char *vnic) {
 204   // Define an array of char that contains the parameters of the unix 'cut' command
 205   char* params[] = {"-f3", "-f11", "-f4", "-f12"};
 206   // Define the unix command to execute in order to read metrics from the vNIC
 207   char* cmd_prefix = "sudo cat /proc/net/dev | grep \"";
 208   char* cmd_mid = "\" | tr -s \' \' | cut -d\' \' ";
 209   char cmd[BUFSIZE];
 210   // Define other variables
 211   char buf[BUFSIZE];            /* buffer used to store VPP metrics     */
 212   int temp[] = {0, 0, 0, 0};    /* temp array that contains VPP values  */
 213   FILE *fp;                     /* file descriptor to pipe cmd to shell */
 214   int i;
 215
 216   for(i = 0; i < 4; i++) {
 217     // Clear buffers
 218     memset(buf, 0, BUFSIZE);
 219     memset(cmd, 0, BUFSIZE);
 220     // Build shell command to read metrics from the vNIC
 221     strcat(cmd, cmd_prefix);
 222     strcat(cmd, vnic);
 223     strcat(cmd, cmd_mid);
 224     strcat(cmd, params[i]);
 225
 226     // Open a pipe and read VPP values
 227     if ((fp = popen(cmd, "r")) == NULL) {
 228       printf("Error opening pipe!\n");
 229       return;
 230     }
 231
 232     while (fgets(buf, BUFSIZE, fp) != NULL);
 233     temp[i] = atoi(buf);
 234
 235     if(pclose(fp))  {
 236       printf("Command not found or exited with error status\n");
 237       return;
 238     }
 239   }
 240
 241   // Store metrics read from the vNIC in the struct passed from the main function
 242   vpp_metrics->bytes_in = temp[0];
 243   vpp_metrics->bytes_out = temp[1];
 244   vpp_metrics->packets_in = temp[2];
 245   vpp_metrics->packets_out = temp[3];
 246 }