[#193] Evenly pick endpoints during VU init

Signed-off-by: a.berezin <a.berezin@yadro.com>

scenarios/grpc.js

@@ -1,6 +1,6 @@
 import { sleep } from 'k6';
 import { SharedArray } from 'k6/data';
-import exec from 'k6/execution';
+import exec, {vu} from 'k6/execution';
 import logging from 'k6/x/frostfs/logging';
 import native from 'k6/x/frostfs/native';
 import registry from 'k6/x/frostfs/registry';
@@ -24,16 +24,9 @@ const container_list = new SharedArray(
 const read_size = JSON.parse(open(__ENV.PREGEN_JSON)).obj_size;
 const summary_json = __ENV.SUMMARY_JSON || '/tmp/summary.json';
 
-// Select random gRPC endpoint for current VU
 const grpc_endpoints = __ENV.GRPC_ENDPOINTS.split(',');
-const grpc_endpoint =
+let vu_logged = false;
-  grpc_endpoints[Math.floor(Math.random() * grpc_endpoints.length)];
+const log = logging.new()
-const grpc_client = native.connect(
-  grpc_endpoint, '', __ENV.DIAL_TIMEOUT ? parseInt(__ENV.DIAL_TIMEOUT) : 5,
-  __ENV.STREAM_TIMEOUT ? parseInt(__ENV.STREAM_TIMEOUT) : 60,
-  __ENV.PREPARE_LOCALLY ? __ENV.PREPARE_LOCALLY.toLowerCase() === 'true' : false,
-  1024 * parseInt(__ENV.MAX_OBJECT_SIZE || '0'));
-const log = logging.new().withField('endpoint', grpc_endpoint);
 
 const registry_enabled = !!__ENV.REGISTRY_FILE;
 const obj_registry =
@@ -41,6 +34,25 @@ const obj_registry =
 
 const duration = __ENV.DURATION;
 
+function get_endpoint() {
+  return grpc_endpoints[(vu.idInTest - 1) % grpc_endpoints.length];
+}
+
+function get_client(op, endpoint) {
+  const grpc_client = native.connect(
+    endpoint, '', __ENV.DIAL_TIMEOUT ? parseInt(__ENV.DIAL_TIMEOUT) : 5,
+    __ENV.STREAM_TIMEOUT ? parseInt(__ENV.STREAM_TIMEOUT) : 60,
+    __ENV.PREPARE_LOCALLY ? __ENV.PREPARE_LOCALLY.toLowerCase() === 'true' : false,
+    1024 * parseInt(__ENV.MAX_OBJECT_SIZE || '0'));
+
+  if (!vu_logged) {
+    log.withFields({op: op, vuidt: vu.idInTest, vuidi: vu.idInInstance, endpoint: endpoint}).info("VU initialized");
+    vu_logged = true;
+  }
+
+  return grpc_client
+}
+
 if (!!__ENV.METRIC_TAGS) {
   stats.setTags(__ENV.METRIC_TAGS)
 }
@@ -157,6 +169,9 @@ export function obj_write() {
     sleep(__ENV.SLEEP_WRITE);
   }
 
+  const grpc_endpoint = get_endpoint();
+  const grpc_client = get_client("WRITE", grpc_endpoint)
+
   const headers = { unique_header: uuidv4() };
   const container =
     container_list[Math.floor(Math.random() * container_list.length)];
@@ -165,7 +180,7 @@ export function obj_write() {
   const resp =
     grpc_client.put(container, headers, payload, write_grpc_chunk_size);
   if (!resp.success) {
-    log.withField('cid', container).error(resp.error);
+    log.withFields({cid: container, endpoint: grpc_endpoint}).error(resp.error);
     return;
   }
 
@@ -179,6 +194,9 @@ export function obj_read() {
     sleep(__ENV.SLEEP_READ);
   }
 
+  const grpc_endpoint = get_endpoint();
+  const grpc_client = get_client("READ", grpc_endpoint)
+
   if (obj_to_read_selector) {
     const obj = obj_to_read_selector.nextObject();
     if (!obj) {
@@ -186,7 +204,7 @@ export function obj_read() {
     }
     const resp = grpc_client.get(obj.c_id, obj.o_id)
     if (!resp.success) {
-      log.withFields({ cid: obj.c_id, oid: obj.o_id }).error(resp.error);
+      log.withFields({cid: obj.c_id, oid: obj.o_id, endpoint: grpc_endpoint}).error(resp.error);
     }
     return
   }
@@ -194,7 +212,7 @@ export function obj_read() {
   const obj = obj_list[Math.floor(Math.random() * obj_list.length)];
   const resp = grpc_client.get(obj.container, obj.object)
   if (!resp.success) {
-    log.withFields({ cid: obj.container, oid: obj.object }).error(resp.error);
+    log.withFields({cid: obj.container, oid: obj.object, endpoint: grpc_endpoint}).error(resp.error);
   }
 }
 
@@ -211,10 +229,13 @@ export function obj_delete() {
     return;
   }
 
+  const grpc_endpoint = get_endpoint();
+  const grpc_client = get_client("DELETE", grpc_endpoint)
+
   const resp = grpc_client.delete(obj.c_id, obj.o_id);
   if (!resp.success) {
     // Log errors except (2052 - object already deleted)
-    log.withFields({ cid: obj.c_id, oid: obj.o_id }).error(resp.error);
+    log.withFields({cid: obj.c_id, oid: obj.o_id, endpoint: grpc_endpoint}).error(resp.error);
     return;
   }
 

scenarios/grpc_car.js

@@ -1,5 +1,7 @@
 import { sleep } from 'k6';
 import { SharedArray } from 'k6/data';
+import { vu } from 'k6/execution';
+
 import logging from 'k6/x/frostfs/logging';
 import native from 'k6/x/frostfs/native';
 import registry from 'k6/x/frostfs/registry';
@@ -23,16 +25,9 @@ const container_list = new SharedArray('container_list', function () {
 const read_size = JSON.parse(open(__ENV.PREGEN_JSON)).obj_size;
 const summary_json = __ENV.SUMMARY_JSON || '/tmp/summary.json';
 
-// Select random gRPC endpoint for current VU
 const grpc_endpoints = __ENV.GRPC_ENDPOINTS.split(',');
-const grpc_endpoint =
+let vu_logged = false;
-  grpc_endpoints[Math.floor(Math.random() * grpc_endpoints.length)];
+const log = logging.new()
-const grpc_client = native.connect(
-  grpc_endpoint, '', __ENV.DIAL_TIMEOUT ? parseInt(__ENV.DIAL_TIMEOUT) : 5,
-  __ENV.STREAM_TIMEOUT ? parseInt(__ENV.STREAM_TIMEOUT) : 60,
-  __ENV.PREPARE_LOCALLY ? __ENV.PREPARE_LOCALLY.toLowerCase() === 'true' : false,
-  1024 * parseInt(__ENV.MAX_OBJECT_SIZE || '0'));
-const log = logging.new().withField('endpoint', grpc_endpoint);
 
 const registry_enabled = !!__ENV.REGISTRY_FILE;
 const obj_registry =
@@ -40,6 +35,25 @@ const obj_registry =
 
 const duration = __ENV.DURATION;
 
+function get_endpoint() {
+  return grpc_endpoints[(vu.idInTest - 1) % grpc_endpoints.length];
+}
+
+function get_client(op, endpoint) {
+  const grpc_client = native.connect(
+    endpoint, '', __ENV.DIAL_TIMEOUT ? parseInt(__ENV.DIAL_TIMEOUT) : 5,
+    __ENV.STREAM_TIMEOUT ? parseInt(__ENV.STREAM_TIMEOUT) : 60,
+    __ENV.PREPARE_LOCALLY ? __ENV.PREPARE_LOCALLY.toLowerCase() === 'true' : false,
+    1024 * parseInt(__ENV.MAX_OBJECT_SIZE || '0'));
+
+  if (!vu_logged) {
+    log.withFields({op: op, vuidt: vu.idInTest, vuidi: vu.idInInstance, endpoint: endpoint}).info("VU initialized");
+    vu_logged = true;
+  }
+
+  return grpc_client
+}
+
 if (!!__ENV.METRIC_TAGS) {
   stats.setTags(__ENV.METRIC_TAGS)
 }
@@ -176,6 +190,9 @@ export function obj_write() {
     sleep(__ENV.SLEEP_WRITE);
   }
 
+  const grpc_endpoint = get_endpoint();
+  const grpc_client = get_client("WRITE", grpc_endpoint)
+
   const headers = { unique_header: uuidv4() };
   const container =
     container_list[Math.floor(Math.random() * container_list.length)];
@@ -184,7 +201,7 @@ export function obj_write() {
   const resp =
     grpc_client.put(container, headers, payload, write_grpc_chunk_size);
   if (!resp.success) {
-    log.withField('cid', container).error(resp.error);
+    log.withFields({cid: container, endpoint: grpc_endpoint}).error(resp.error);
     return;
   }
 
@@ -198,6 +215,9 @@ export function obj_read() {
     sleep(__ENV.SLEEP_READ);
   }
 
+  const grpc_endpoint = get_endpoint();
+  const grpc_client = get_client("READ", grpc_endpoint)
+
   if (obj_to_read_selector) {
     const obj = obj_to_read_selector.nextObject();
     if (!obj) {
@@ -205,7 +225,7 @@ export function obj_read() {
     }
     const resp = grpc_client.get(obj.c_id, obj.o_id)
     if (!resp.success) {
-      log.withFields({ cid: obj.c_id, oid: obj.o_id }).error(resp.error);
+      log.withFields({cid: obj.c_id, oid: obj.o_id, endpoint: grpc_endpoint}).error(resp.error);
     }
     return
   }
@@ -213,7 +233,7 @@ export function obj_read() {
   const obj = obj_list[Math.floor(Math.random() * obj_list.length)];
   const resp = grpc_client.get(obj.container, obj.object)
   if (!resp.success) {
-    log.withFields({ cid: obj.container, oid: obj.object }).error(resp.error);
+    log.withFields({cid: obj.container, oid: obj.object, endpoint: grpc_endpoint}).error(resp.error);
   }
 }
 
@@ -227,10 +247,13 @@ export function obj_delete() {
     return;
   }
 
+  const grpc_endpoint = get_endpoint();
+  const grpc_client = get_client("DELETE", grpc_endpoint)
+
   const resp = grpc_client.delete(obj.c_id, obj.o_id);
   if (!resp.success) {
     // Log errors except (2052 - object already deleted)
-    log.withFields({ cid: obj.c_id, oid: obj.o_id }).error(resp.error);
+    log.withFields({cid: obj.c_id, oid: obj.o_id, endpoint: grpc_endpoint}).error(resp.error);
     return;
   }
 

scenarios/http.js

@@ -1,5 +1,6 @@
 import {sleep} from 'k6';
 import {SharedArray} from 'k6/data';
+import { vu } from 'k6/execution';
 import http from 'k6/http';
 import logging from 'k6/x/frostfs/logging';
 import registry from 'k6/x/frostfs/registry';
@@ -23,11 +24,9 @@ const container_list = new SharedArray('container_list', function() {
 const read_size = JSON.parse(open(__ENV.PREGEN_JSON)).obj_size;
 const summary_json = __ENV.SUMMARY_JSON || '/tmp/summary.json';
 
-// Select random HTTP endpoint for current VU
 const http_endpoints = __ENV.HTTP_ENDPOINTS.split(',');
-const http_endpoint =
+let vu_logged = false;
-    http_endpoints[Math.floor(Math.random() * http_endpoints.length)];
+const log = logging.new()
-const log = logging.new().withField('endpoint', http_endpoint);
 
 const registry_enabled = !!__ENV.REGISTRY_FILE;
 const obj_registry =
@@ -35,6 +34,17 @@ const obj_registry =
 
 const duration = __ENV.DURATION;
 
+function get_endpoint(op) {
+  const endpoint = http_endpoints[(vu.idInTest - 1) % http_endpoints.length];
+
+  if (!vu_logged) {
+    log.withFields({op: op, vuidt: vu.idInTest, vuidi: vu.idInInstance, endpoint: endpoint}).info("VU initialized");
+    vu_logged = true;
+  }
+
+  return endpoint
+}
+
 if (!!__ENV.METRIC_TAGS) {
   stats.setTags(__ENV.METRIC_TAGS)
 }
@@ -117,9 +127,11 @@ export function obj_write() {
     file: http.file(payload.bytes(), 'random.data'),
   };
 
+  const http_endpoint = get_endpoint("WRITE")
+
   const resp = http.post(`http://${http_endpoint}/upload/${container}`, data);
   if (resp.status != 200) {
-    log.withFields({status: resp.status, cid: container}).error(resp.error);
+    log.withFields({status: resp.status, cid: container, endpoint: http_endpoint}).error(resp.error);
     return;
   }
   const object_id = JSON.parse(resp.body).object_id;
@@ -133,11 +145,13 @@ export function obj_read() {
     sleep(__ENV.SLEEP_READ);
   }
 
+  const http_endpoint = get_endpoint("READ")
+
   const obj = obj_list[Math.floor(Math.random() * obj_list.length)];
   const resp =
       http.get(`http://${http_endpoint}/get/${obj.container}/${obj.object}`);
   if (resp.status != 200) {
-    log.withFields({status: resp.status, cid: obj.container, oid: obj.object})
+    log.withFields({status: resp.status, cid: obj.container, oid: obj.object, endpoint: http_endpoint})
         .error(resp.error);
   }
 }

scenarios/s3.js

@@ -1,6 +1,6 @@
 import {sleep} from 'k6';
 import {SharedArray} from 'k6/data';
-import exec from 'k6/execution';
+import exec, {vu} from 'k6/execution';
 import logging from 'k6/x/frostfs/logging';
 import registry from 'k6/x/frostfs/registry';
 import s3 from 'k6/x/frostfs/s3';
@@ -28,19 +28,29 @@ const no_verify_ssl = __ENV.NO_VERIFY_SSL || 'true';
 const connection_args = {
   no_verify_ssl : no_verify_ssl
 }
-// Select random S3 endpoint for current VU
 const s3_endpoints = __ENV.S3_ENDPOINTS.split(',');
-const s3_endpoint =
+const log = logging.new()
-    s3_endpoints[Math.floor(Math.random() * s3_endpoints.length)];
-const s3_client = s3.connect(s3_endpoint, connection_args);
-const log = logging.new().withField('endpoint', s3_endpoint);
-
 const registry_enabled = !!__ENV.REGISTRY_FILE;
 const obj_registry =
     registry_enabled ? registry.open(__ENV.REGISTRY_FILE) : undefined;
-
+let vu_logged = false;
 const duration = __ENV.DURATION;
 
+function get_endpoint() {
+  return s3_endpoints[(vu.idInTest - 1) % s3_endpoints.length];
+}
+
+function get_client(op, endpoint) {
+  const s3_client = s3.connect(endpoint, connection_args);
+
+  if (!vu_logged) {
+    log.withFields({op: op, vuidt: vu.idInTest, vuidi: vu.idInInstance, endpoint: endpoint}).info("VU initialized");
+    vu_logged = true;
+  }
+
+  return s3_client;
+}
+
 if (!!__ENV.METRIC_TAGS) {
   stats.setTags(__ENV.METRIC_TAGS)
 }
@@ -159,13 +169,16 @@ export function obj_write() {
     sleep(__ENV.SLEEP_WRITE);
   }
 
+  const s3_endpoint = get_endpoint();
+  const s3_client = get_client("WRITE", s3_endpoint)
+
   const key = generateS3Key();
   const bucket = bucket_list[Math.floor(Math.random() * bucket_list.length)];
 
   const payload = generator.genPayload();
   const resp = s3_client.put(bucket, key, payload);
   if (!resp.success) {
-    log.withFields({bucket : bucket, key : key}).error(resp.error);
+    log.withFields({bucket : bucket, key : key, endpoint: s3_endpoint}).error(resp.error);
     return;
   }
 
@@ -179,14 +192,18 @@ export function obj_read() {
     sleep(__ENV.SLEEP_READ);
   }
 
+  const s3_endpoint = get_endpoint();
+  const s3_client = get_client("READ", s3_endpoint)
+
   if (obj_to_read_selector) {
     const obj = obj_to_read_selector.nextObject();
     if (!obj) {
       return;
     }
+
     const resp = s3_client.get(obj.s3_bucket, obj.s3_key)
     if (!resp.success) {
-      log.withFields({bucket : obj.s3_bucket, key : obj.s3_key})
+      log.withFields({bucket : obj.s3_bucket, key : obj.s3_key, endpoint: s3_endpoints})
           .error(resp.error);
     }
     return
@@ -205,6 +222,9 @@ export function obj_delete() {
     sleep(__ENV.SLEEP_DELETE);
   }
 
+  const s3_endpoint = get_endpoint();
+  const s3_client = get_client("DELETE", s3_endpoint)
+
   const obj = obj_to_delete_selector.nextObject();
   if (!obj) {
     if (obj_to_delete_exit_on_null) {
@@ -217,7 +237,7 @@ export function obj_delete() {
 
   const resp = s3_client.delete(obj.s3_bucket, obj.s3_key);
   if (!resp.success) {
-    log.withFields({bucket : obj.s3_bucket, key : obj.s3_key, op : 'DELETE'})
+    log.withFields({bucket : obj.s3_bucket, key : obj.s3_key, endpoint: s3_endpoint, op : 'DELETE'})
         .error(resp.error);
     return;
   }

scenarios/s3_car.js

@@ -1,5 +1,6 @@
 import {sleep} from 'k6';
 import {SharedArray} from 'k6/data';
+import { vu } from 'k6/execution';
 import logging from 'k6/x/frostfs/logging';
 import registry from 'k6/x/frostfs/registry';
 import s3 from 'k6/x/frostfs/s3';
@@ -23,16 +24,13 @@ const bucket_list = new SharedArray('bucket_list', function() {
 const read_size = JSON.parse(open(__ENV.PREGEN_JSON)).obj_size;
 const summary_json = __ENV.SUMMARY_JSON || '/tmp/summary.json';
 
-// Select random S3 endpoint for current VU
 const s3_endpoints = __ENV.S3_ENDPOINTS.split(',');
-const s3_endpoint =
-    s3_endpoints[Math.floor(Math.random() * s3_endpoints.length)];
 const no_verify_ssl = __ENV.NO_VERIFY_SSL || 'true';
 const connection_args = {
   no_verify_ssl: no_verify_ssl
 };
-const s3_client = s3.connect(s3_endpoint, connection_args);
+let vu_logged = false;
-const log = logging.new().withField('endpoint', s3_endpoint);
+const log = logging.new()
 
 const registry_enabled = !!__ENV.REGISTRY_FILE;
 const obj_registry =
@@ -40,6 +38,21 @@ const obj_registry =
 
 const duration = __ENV.DURATION;
 
+function get_endpoint() {
+  return s3_endpoints[(vu.idInTest - 1) % s3_endpoints.length];
+}
+
+function get_client(op, endpoint) {
+  const s3_client = s3.connect(endpoint, connection_args);
+
+  if (!vu_logged) {
+    log.withFields({op: op, vuidt: vu.idInTest, vuidi: vu.idInInstance, endpoint: endpoint}).info("VU initialized");
+    vu_logged = true;
+  }
+
+  return s3_client;
+}
+
 if (!!__ENV.METRIC_TAGS) {
   stats.setTags(__ENV.METRIC_TAGS)
 }
@@ -177,13 +190,16 @@ export function obj_write() {
     sleep(__ENV.SLEEP_WRITE);
   }
 
+  const s3_endpoint = get_endpoint();
+  const s3_client = get_client("WRITE", s3_endpoint)
+
   const key = generateS3Key();
   const bucket = bucket_list[Math.floor(Math.random() * bucket_list.length)];
 
   const payload = generator.genPayload();
   const resp = s3_client.put(bucket, key, payload);
   if (!resp.success) {
-    log.withFields({bucket: bucket, key: key}).error(resp.error);
+    log.withFields({bucket: bucket, key: key, endpoint: s3_endpoint}).error(resp.error);
     return;
   }
 
@@ -197,6 +213,9 @@ export function obj_read() {
     sleep(__ENV.SLEEP_READ);
   }
 
+  const s3_endpoint = get_endpoint();
+  const s3_client = get_client("READ", s3_endpoint)
+
   if (obj_to_read_selector) {
     const obj = obj_to_read_selector.nextObject();
     if (!obj) {
@@ -214,7 +233,7 @@ export function obj_read() {
 
   const resp = s3_client.get(obj.bucket, obj.object);
   if (!resp.success) {
-    log.withFields({bucket: obj.bucket, key: obj.object}).error(resp.error);
+    log.withFields({bucket: obj.bucket, key: obj.object, endpoint: s3_endpoint}).error(resp.error);
   }
 }
 
@@ -228,9 +247,12 @@ export function obj_delete() {
     return;
   }
 
+  const s3_endpoint = get_endpoint();
+  const s3_client = get_client("DELETE", s3_endpoint)
+
   const resp = s3_client.delete(obj.s3_bucket, obj.s3_key);
   if (!resp.success) {
-    log.withFields({bucket: obj.s3_bucket, key: obj.s3_key, op: 'DELETE'})
+    log.withFields({bucket: obj.s3_bucket, key: obj.s3_key, op: 'DELETE', endpoint: s3_endpoint})
         .error(resp.error);
     return;
   }

scenarios/s3_dar.js

@@ -1,6 +1,6 @@
 import {sleep} from 'k6';
 import {SharedArray} from 'k6/data';
-import exec from 'k6/execution';
+import exec, {vu} from 'k6/execution';
 import logging from 'k6/x/frostfs/logging';
 import registry from 'k6/x/frostfs/registry';
 import s3 from 'k6/x/frostfs/s3';
@@ -29,19 +29,31 @@ const no_verify_ssl = __ENV.NO_VERIFY_SSL || 'true';
 const connection_args = {
     no_verify_ssl : no_verify_ssl
 }
-// Select random S3 endpoint for current VU
+
 const s3_endpoints = __ENV.S3_ENDPOINTS.split(',');
-const s3_endpoint =
+const log = logging.new()
-    s3_endpoints[Math.floor(Math.random() * s3_endpoints.length)];
-const s3_client = s3.connect(s3_endpoint, connection_args);
-const log = logging.new().withField('endpoint', s3_endpoint);
 
 const registry_enabled = !!__ENV.REGISTRY_FILE;
 const obj_registry =
     registry_enabled ? registry.open(__ENV.REGISTRY_FILE) : undefined;
-
+let vu_logged = false;
 const duration = __ENV.DURATION;
 
+function get_endpoint() {
+  return s3_endpoints[(vu.idInTest - 1) % s3_endpoints.length];
+}
+
+function get_client(op, endpoint) {
+  const s3_client = s3.connect(endpoint, connection_args);
+
+  if (!vu_logged) {
+    log.withFields({op: op, vuidt: vu.idInTest, vuidi: vu.idInInstance, endpoint: endpoint}).info("VU initialized");
+    vu_logged = true;
+  }
+
+  return s3_client;
+}
+
 if (!!__ENV.METRIC_TAGS) {
     stats.setTags(__ENV.METRIC_TAGS)
 }
@@ -159,13 +171,16 @@ export function obj_write() {
         sleep(__ENV.SLEEP_WRITE);
     }
 
+    const s3_endpoint = get_endpoint();
+    const s3_client = get_client("WRITE", s3_endpoint)
+
     const key = generateS3Key();
     const bucket = bucket_list[Math.floor(Math.random() * bucket_list.length)];
 
     const payload = generator.genPayload();
     const resp = s3_client.put(bucket, key, payload);
     if (!resp.success) {
-        log.withFields({bucket : bucket, key : key}).error(resp.error);
+        log.withFields({bucket : bucket, key : key, endpoint: s3_endpoint}).error(resp.error);
         return;
     }
 
@@ -179,6 +194,9 @@ export function obj_read() {
         sleep(__ENV.SLEEP_READ);
     }
 
+    const s3_endpoint = get_endpoint();
+    const s3_client = get_client("READ", s3_endpoint)
+
     if (obj_to_read_selector) {
         const obj = obj_to_read_selector.nextObject();
         if (!obj  ) {
@@ -186,7 +204,7 @@ export function obj_read() {
         }
         const resp = s3_client.get(obj.s3_bucket, obj.s3_key)
         if (!resp.success) {
-            log.withFields({bucket : obj.s3_bucket, key : obj.s3_key, status: obj.status, op: `READ`})
+            log.withFields({bucket : obj.s3_bucket, key : obj.s3_key, status: obj.status, op: `READ`, endpoint: s3_endpoint})
                 .error(resp.error);
         } else {
             obj_registry.setObjectStatus(obj.id, obj.status, 'read');
@@ -199,7 +217,7 @@ export function obj_read() {
 
     const resp = s3_client.get(obj.bucket, obj.object);
     if (!resp.success) {
-        log.withFields({bucket : obj.bucket, key : obj.object}).error(resp.error);
+        log.withFields({bucket : obj.bucket, key : obj.object, endpoint: s3_endpoint}).error(resp.error);
     } else {
         obj_registry.setObjectStatus(obj.id, obj.status, 'read');
     }
@@ -222,9 +240,12 @@ export function delete_object(obj) {
         return;
     }
 
+    const s3_endpoint = get_endpoint();
+    const s3_client = get_client("DELETE", s3_endpoint)
+
     const resp = s3_client.delete(obj.s3_bucket, obj.s3_key);
     if (!resp.success) {
-        log.withFields({bucket : obj.s3_bucket, key : obj.s3_key, op : 'DELETE'})
+        log.withFields({bucket : obj.s3_bucket, key : obj.s3_key, op : 'DELETE', endpoint: s3_endpoint})
             .error(resp.error);
         return;
     }

scenarios/s3_multipart.js

@@ -1,5 +1,6 @@
 import {sleep} from 'k6';
 import {SharedArray} from 'k6/data';
+import { vu } from 'k6/execution';
 import logging from 'k6/x/frostfs/logging';
 import registry from 'k6/x/frostfs/registry';
 import s3 from 'k6/x/frostfs/s3';
@@ -18,16 +19,13 @@ const bucket_list = new SharedArray('bucket_list', function() {
 
 const summary_json = __ENV.SUMMARY_JSON || '/tmp/summary.json';
 
-// Select random S3 endpoint for current VU
 const s3_endpoints = __ENV.S3_ENDPOINTS.split(',');
-const s3_endpoint =
-    s3_endpoints[Math.floor(Math.random() * s3_endpoints.length)];
 const no_verify_ssl = __ENV.NO_VERIFY_SSL || 'true';
 const connection_args = {
   no_verify_ssl: no_verify_ssl
 };
-const s3_client = s3.connect(s3_endpoint, connection_args);
+let vu_logged = false;
-const log = logging.new().withField('endpoint', s3_endpoint);
+const log = logging.new();
 
 const registry_enabled = !!__ENV.REGISTRY_FILE;
 const obj_registry =
@@ -35,6 +33,21 @@ const obj_registry =
 
 const duration = __ENV.DURATION;
 
+function get_endpoint() {
+  return s3_endpoints[(vu.idInTest - 1) % s3_endpoints.length];
+}
+
+function get_client(op, endpoint) {
+  const s3_client = s3.connect(endpoint, connection_args);
+
+  if (!vu_logged) {
+    log.withFields({op: op, vuidt: vu.idInTest, vuidi: vu.idInInstance, endpoint: endpoint}).info("VU initialized");
+    vu_logged = true;
+  }
+
+  return s3_client;
+}
+
 if (!!__ENV.METRIC_TAGS) {
   stats.setTags(__ENV.METRIC_TAGS)
 }
@@ -101,6 +114,9 @@ export function obj_write_multipart() {
     sleep(__ENV.SLEEP_WRITE);
   }
 
+  const s3_endpoint = get_endpoint();
+  const s3_client = get_client("WRITE", s3_endpoint)
+
   const key = generateS3Key();
   const bucket = bucket_list[Math.floor(Math.random() * bucket_list.length)];
 
@@ -109,7 +125,7 @@ export function obj_write_multipart() {
       bucket, key, write_multipart_part_size, write_multipart_vu_count,
       payload);
   if (!resp.success) {
-    log.withFields({bucket: bucket, key: key}).error(resp.error);
+    log.withFields({bucket: bucket, key: key, endpoint: s3_endpoint}).error(resp.error);
     return;
   }