Added image connectivity check (#863 )

* Added image connectivity check * removed image connectivity flag * renaming
Cypress: pods and namespaces to params & param for the 'src' and 'dest' checks (#864 )
2026-02-15 02:19:54 +00:00 · 2022-02-28 18:04:33 +02:00 · 2022-02-28 17:23:33 +02:00 · 2022-02-28 17:40:05 +03:00
13 changed files with 1091 additions and 197 deletions
--- a/acceptanceTests/cypress/integration/tests/UiTest.js
+++ b/acceptanceTests/cypress/integration/tests/UiTest.js
@@ -1,15 +1,24 @@
 import {findLineAndCheck, getExpectedDetailsDict} from "../testHelpers/StatusBarHelper";
 import {
+    leftOnHoverCheck,
    leftTextCheck,
    resizeToHugeMizu,
    resizeToNormalMizu,
    rightOnHoverCheck,
-    leftOnHoverCheck,
    rightTextCheck,
    verifyMinimumEntries
 } from "../testHelpers/TrafficHelper";
+
 const refreshWaitTimeout = 10000;

+
+const fullParam = Cypress.env('arrayDict'); // "Name:fooNamespace:barName:foo1Namespace:bar1"
+const podsArray = fullParam.split('Name:').slice(1); // ["fooNamespace:bar", "foo1Namespace:bar1"]
+podsArray.forEach((podStr, index) => {
+    const podAndNamespaceArr = podStr.split('Namespace:'); // [foo, bar] / [foo1, bar1]
+    podsArray[index] = getExpectedDetailsDict(podAndNamespaceArr[0], podAndNamespaceArr[1]);
+});
+
 it('opening mizu', function () {
    cy.visit(Cypress.env('testUrl'));
 });
@@ -17,16 +26,13 @@ it('opening mizu', function () {
 verifyMinimumEntries();

 it('top bar check', function () {
-    const podName1 = 'httpbin', namespace1 = 'mizu-tests';
-    const podName2 = 'httpbin2', namespace2 = 'mizu-tests';
-
    cy.get('.podsCount').trigger('mouseover');
-    findLineAndCheck(getExpectedDetailsDict(podName1, namespace1));
-    findLineAndCheck(getExpectedDetailsDict(podName2, namespace2));
+    podsArray.map(findLineAndCheck);
    cy.reload();
 });

 it('filtering guide check', function () {
+    cy.reload();
    cy.get('[title="Open Filtering Guide (Cheatsheet)"]').click();
    cy.get('#modal-modal-title').should('be.visible');
    cy.get('[lang="en"]').click(0, 0);
@@ -64,8 +70,6 @@ it('right side sanity test', function () {
    });
 });

-serviceMapCheck();
-
 checkIllegalFilter('invalid filter');

 checkFilter({
@@ -86,14 +90,27 @@ checkFilter({
    applyByEnter: false
 });

-checkFilter({
-    name: 'src.name == ""',
-    leftSidePath: '[title="Source Name"]',
-    leftSideExpectedText: '[Unresolved]',
-    rightSidePath: '> :nth-child(2) [title="Source Name"]',
-    rightSideExpectedText: '[Unresolved]',
-    applyByEnter: false
-});
+if (Cypress.env('shouldCheckSrcAndDest')) {
+    serviceMapCheck();
+
+    checkFilter({
+        name: 'src.name == ""',
+        leftSidePath: '[title="Source Name"]',
+        leftSideExpectedText: '[Unresolved]',
+        rightSidePath: '> :nth-child(2) [title="Source Name"]',
+        rightSideExpectedText: '[Unresolved]',
+        applyByEnter: false
+    });
+
+    checkFilter({
+        name: `dst.name == "httpbin.mizu-tests"`,
+        leftSidePath: '> :nth-child(3) > :nth-child(2) > :nth-child(3) > :nth-child(2)',
+        leftSideExpectedText: 'httpbin.mizu-tests',
+        rightSidePath: '> :nth-child(2) > :nth-child(2) > :nth-child(2) > :nth-child(3) > :nth-child(2)',
+        rightSideExpectedText: 'httpbin.mizu-tests',
+        applyByEnter: false
+    });
+}

 checkFilter({
    name: 'method == "GET"',
@@ -113,15 +130,6 @@ checkFilter({
    applyByEnter: false
 });

-checkFilter({
-    name: 'dst.name == "httpbin.mizu-tests"',
-    leftSidePath: '> :nth-child(3) > :nth-child(2) > :nth-child(3) > :nth-child(2)',
-    leftSideExpectedText: 'httpbin.mizu-tests',
-    rightSidePath: '> :nth-child(2) > :nth-child(2) > :nth-child(2) > :nth-child(3) > :nth-child(2)',
-    rightSideExpectedText: 'httpbin.mizu-tests',
-    applyByEnter: false
-});
-
 checkFilter({
    name: 'src.ip == "127.0.0.1"',
    leftSidePath: '[title="Source IP"]',
@@ -169,6 +177,7 @@ function shouldNotExist(entryNum) {

 function checkIllegalFilter(illegalFilterName) {
    it(`should show red search bar with the input: ${illegalFilterName}`, function () {
+        cy.reload();
        cy.get('#total-entries').then(number => {
            const totalEntries = number.text();

--- a/acceptanceTests/tap_test.go
+++ b/acceptanceTests/tap_test.go
@@ -62,7 +62,19 @@ func TestTap(t *testing.T) {
 				}
 			}

-			runCypressTests(t, fmt.Sprintf("npx cypress run --spec  \"cypress/integration/tests/UiTest.js\" --env entriesCount=%d", entriesCount))
+			expectedPods := []PodDescriptor{
+				{Name: "httpbin", Namespace: "mizu-tests"},
+				{Name: "httpbin2", Namespace: "mizu-tests"},
+			}
+
+			var expectedPodsStr string
+			for i := 0; i < len(expectedPods); i++ {
+				expectedPodsStr += fmt.Sprintf("Name:%vNamespace:%v", expectedPods[i].Name, expectedPods[i].Namespace)
+			}
+			
+			const shouldCheckSrcAndDest = false
+			runCypressTests(t, fmt.Sprintf("npx cypress run --spec  \"cypress/integration/tests/UiTest.js\" --env entriesCount=%d,arrayDict=%v,shouldCheckSrcAndDest=%v",
+				entriesCount, expectedPodsStr, shouldCheckSrcAndDest))
 		})
 	}
 }
--- a/acceptanceTests/testsUtils.go
+++ b/acceptanceTests/testsUtils.go
@@ -148,9 +148,9 @@ func getDefaultConfigCommandArgs() []string {
 func runCypressTests(t *testing.T, cypressRunCmd string) {
 	cypressCmd := exec.Command("bash", "-c", cypressRunCmd)
 	t.Logf("running command: %v", cypressCmd.String())
-	out, err := cypressCmd.Output()
+	out, err := cypressCmd.CombinedOutput()
 	if err != nil {
-		t.Errorf("error running cypress, error: %v", err)
+		t.Errorf("error running cypress, error: %v, output: %v", err, string(out))
 		return
 	}

--- a/agent/go.mod
+++ b/agent/go.mod
@@ -4,7 +4,7 @@ go 1.17

 require (
 	github.com/antelman107/net-wait-go v0.0.0-20210623112055-cf684aebda7b
-	github.com/chanced/openapi v0.0.7
+	github.com/chanced/openapi v0.0.8
 	github.com/djherbis/atime v1.1.0
 	github.com/elastic/go-elasticsearch/v7 v7.17.0
 	github.com/getkin/kin-openapi v0.89.0
--- a/agent/go.sum
+++ b/agent/go.sum
@@ -132,8 +132,8 @@ github.com/chanced/cmpjson v0.0.0-20210415035445-da9262c1f20a/go.mod h1:yhcmlFk1
 github.com/chanced/dynamic v0.0.0-20210502140838-c010b5fc3e44/go.mod h1:XVNfXN5kgZST4PQ0W/oBAHJku2OteCeHxjAbvfd0ARM=
 github.com/chanced/dynamic v0.0.0-20211210164248-f8fadb1d735b h1:nQWfVfhByCAYUjDxWNMyMtq3VZ8AGOxF7wZlDnC5cTc=
 github.com/chanced/dynamic v0.0.0-20211210164248-f8fadb1d735b/go.mod h1:XVNfXN5kgZST4PQ0W/oBAHJku2OteCeHxjAbvfd0ARM=
-github.com/chanced/openapi v0.0.7 h1:OmOBHCg/5ViUg0gaGxXBeEFoVBE8C2pHK4BO/AiD6k8=
-github.com/chanced/openapi v0.0.7/go.mod h1:SxE2VMLPw+T7Vq8nwbVVhDF2PigvRF4n5XyqsVpRJGU=
+github.com/chanced/openapi v0.0.8 h1:pOqKTvZEET2odGE+kJBrAdXvgpTKFPk+XRz5NTuMvrM=
+github.com/chanced/openapi v0.0.8/go.mod h1:SxE2VMLPw+T7Vq8nwbVVhDF2PigvRF4n5XyqsVpRJGU=
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
--- a/agent/pkg/oas/specgen.go
+++ b/agent/pkg/oas/specgen.go
@@ -188,7 +188,7 @@ func (g *SpecGen) handlePathObj(entryWithSource *EntryWithSource) (string, error
 	}

 	if entry.Request.Method == "OPTIONS" {
-		logger.Log.Debugf("Dropped traffic entry due to its method: %s", urlParsed.Path)
+		logger.Log.Debugf("Dropped traffic entry due to its method: %s %s", entry.Request.Method, urlParsed.Path)
 		return "", nil
 	}

--- a/agent/pkg/oas/specgen_test.go
+++ b/agent/pkg/oas/specgen_test.go
@@ -48,7 +48,24 @@ func TestEntries(t *testing.T) {
 		t.FailNow()
 	}
 	GetOasGeneratorInstance().Start()
-	loadStartingOAS()
+	loadStartingOAS("test_artifacts/catalogue.json", "catalogue")
+	loadStartingOAS("test_artifacts/trcc.json", "trcc-api-service")
+
+	go func() {
+		for {
+			time.Sleep(1 * time.Second)
+			GetOasGeneratorInstance().ServiceSpecs.Range(func(key, val interface{}) bool {
+				svc := key.(string)
+				t.Logf("Getting spec for %s", svc)
+				gen := val.(*SpecGen)
+				_, err := gen.GetSpec()
+				if err != nil {
+					t.Error(err)
+				}
+				return true
+			})
+		}
+	}()

 	cnt, err := feedEntries(files, true)
 	if err != nil {
@@ -154,6 +171,13 @@ func TestFileSingle(t *testing.T) {
 			t.FailNow()
 		}

+		if os.Getenv("MIZU_OAS_WRITE_FILES") != "" {
+			err = ioutil.WriteFile(file+".spec.json", []byte(specText), 0644)
+			if err != nil {
+				panic(err)
+			}
+		}
+
 		if len(diff) > 0 {
 			t.Errorf("Generated spec does not match expected:\n%s", diff.String())
 		}
@@ -175,8 +199,7 @@ func waitQueueProcessed() {
 	}
 }

-func loadStartingOAS() {
-	file := "test_artifacts/catalogue.json"
+func loadStartingOAS(file string, label string) {
 	fd, err := os.Open(file)
 	if err != nil {
 		panic(err)
@@ -195,10 +218,10 @@ func loadStartingOAS() {
 		panic(err)
 	}

-	gen := NewGen("catalogue")
+	gen := NewGen(label)
 	gen.StartFromSpec(doc)

-	GetOasGeneratorInstance().ServiceSpecs.Store("catalogue", gen)
+	GetOasGeneratorInstance().ServiceSpecs.Store(label, gen)
 }

 func TestEntriesNegative(t *testing.T) {
--- a/agent/pkg/oas/test_artifacts/params.har
+++ b/agent/pkg/oas/test_artifacts/params.har
@@ -538,6 +538,252 @@
          "wait": -1,
          "receive": 1
        }
+      },
+      {
+        "startedDateTime": "2019-09-06T06:16:22.000000+00:00",
+        "time": 1,
+        "request": {
+          "method": "GET",
+          "url": "https://httpbin.org/param-patterns/prefix-gibberish-fine/234324",
+          "httpVersion": "",
+          "cookies": [],
+          "headers": [
+          ],
+          "queryString": [],
+          "headersSize": -1,
+          "bodySize": -1,
+          "postData": {
+            "mimeType": "",
+            "text": ""
+          }
+        },
+        "response": {
+          "status": 200,
+          "statusText": "OK",
+          "httpVersion": "",
+          "cookies": [],
+          "headers": [
+          ],
+          "content": {
+            "size": 0,
+            "mimeType": "",
+            "text": ""
+          },
+          "redirectURL": "",
+          "headersSize": -1,
+          "bodySize": 0
+        },
+        "cache": {},
+        "timings": {
+          "send": -1,
+          "wait": -1,
+          "receive": 1
+        }
+      },
+      {
+        "startedDateTime": "2019-09-06T06:16:22.000001+00:00",
+        "time": 1,
+        "request": {
+          "method": "GET",
+          "url": "https://httpbin.org/param-patterns/prefix-gibberish-sfdlasdfkadf87sd93284q24r/1",
+          "httpVersion": "",
+          "cookies": [],
+          "headers": [
+          ],
+          "queryString": [],
+          "headersSize": -1,
+          "bodySize": -1,
+          "postData": {
+            "mimeType": "",
+            "text": ""
+          }
+        },
+        "response": {
+          "status": 200,
+          "statusText": "OK",
+          "httpVersion": "",
+          "cookies": [],
+          "headers": [
+          ],
+          "content": {
+            "size": 0,
+            "mimeType": "",
+            "text": ""
+          },
+          "redirectURL": "",
+          "headersSize": -1,
+          "bodySize": 0
+        },
+        "cache": {},
+        "timings": {
+          "send": -1,
+          "wait": -1,
+          "receive": 1
+        }
+      },
+     {
+        "startedDateTime": "2019-09-06T06:16:22.000002+00:00",
+        "time": 1,
+        "request": {
+          "method": "GET",
+          "url": "https://httpbin.org/param-patterns/prefix-gibberish-adslkfasdf89sa7dfasddafa8a98sd7kansdf/static",
+          "httpVersion": "",
+          "cookies": [],
+          "headers": [
+          ],
+          "queryString": [],
+          "headersSize": -1,
+          "bodySize": -1,
+          "postData": {
+            "mimeType": "",
+            "text": ""
+          }
+        },
+        "response": {
+          "status": 200,
+          "statusText": "OK",
+          "httpVersion": "",
+          "cookies": [],
+          "headers": [
+          ],
+          "content": {
+            "size": 0,
+            "mimeType": "",
+            "text": ""
+          },
+          "redirectURL": "",
+          "headersSize": -1,
+          "bodySize": 0
+        },
+        "cache": {},
+        "timings": {
+          "send": -1,
+          "wait": -1,
+          "receive": 1
+        }
+      },
+     {
+        "startedDateTime": "2019-09-06T06:16:22.000003+00:00",
+        "time": 1,
+        "request": {
+          "method": "GET",
+          "url": "https://httpbin.org/param-patterns/prefix-gibberish-4jk5l2345h2452l4352435jlk45",
+          "httpVersion": "",
+          "cookies": [],
+          "headers": [
+          ],
+          "queryString": [],
+          "headersSize": -1,
+          "bodySize": -1,
+          "postData": {
+            "mimeType": "",
+            "text": ""
+          }
+        },
+        "response": {
+          "status": 200,
+          "statusText": "OK",
+          "httpVersion": "",
+          "cookies": [],
+          "headers": [
+          ],
+          "content": {
+            "size": 0,
+            "mimeType": "",
+            "text": ""
+          },
+          "redirectURL": "",
+          "headersSize": -1,
+          "bodySize": 0
+        },
+        "cache": {},
+        "timings": {
+          "send": -1,
+          "wait": -1,
+          "receive": 1
+        }
+      },
+     {
+        "startedDateTime": "2019-09-06T06:16:22.000004+00:00",
+        "time": 1,
+        "request": {
+          "method": "GET",
+          "url": "https://httpbin.org/param-patterns/prefix-gibberish-84395h2j4k35hj243j5h2kl34h54k",
+          "httpVersion": "",
+          "cookies": [],
+          "headers": [
+          ],
+          "queryString": [],
+          "headersSize": -1,
+          "bodySize": -1,
+          "postData": {
+            "mimeType": "",
+            "text": ""
+          }
+        },
+        "response": {
+          "status": 200,
+          "statusText": "OK",
+          "httpVersion": "",
+          "cookies": [],
+          "headers": [
+          ],
+          "content": {
+            "size": 0,
+            "mimeType": "",
+            "text": ""
+          },
+          "redirectURL": "",
+          "headersSize": -1,
+          "bodySize": 0
+        },
+        "cache": {},
+        "timings": {
+          "send": -1,
+          "wait": -1,
+          "receive": 1
+        }
+      },
+      {
+        "startedDateTime": "2019-09-06T06:16:22.000002+00:00",
+        "time": 1,
+        "request": {
+          "method": "GET",
+          "url": "https://httpbin.org/param-patterns/prefix-gibberish-afterwards/23421",
+          "httpVersion": "",
+          "cookies": [],
+          "headers": [
+          ],
+          "queryString": [],
+          "headersSize": -1,
+          "bodySize": -1,
+          "postData": {
+            "mimeType": "",
+            "text": ""
+          }
+        },
+        "response": {
+          "status": 200,
+          "statusText": "OK",
+          "httpVersion": "",
+          "cookies": [],
+          "headers": [
+          ],
+          "content": {
+            "size": 0,
+            "mimeType": "",
+            "text": ""
+          },
+          "redirectURL": "",
+          "headersSize": -1,
+          "bodySize": 0
+        },
+        "cache": {},
+        "timings": {
+          "send": -1,
+          "wait": -1,
+          "receive": 1
+        }
      }
    ]
  }
--- a/agent/pkg/oas/test_artifacts/params.har.spec.json
+++ b/agent/pkg/oas/test_artifacts/params.har.spec.json
@@ -2,7 +2,7 @@
  "openapi": "3.1.0",
  "info": {
    "title": "https://httpbin.org",
-    "description": "Mizu observed 13 entries (0 failed), at 0.155 hits/s, average response time is 0.251 seconds",
+    "description": "Mizu observed 19 entries (0 failed), at 0.10 hits/s, average response time is 0.17 seconds",
    "version": "1.0"
  },
  "servers": [
@@ -14,8 +14,8 @@
    "/appears-once": {
      "get": {
        "summary": "/appears-once",
-        "description": "Mizu observed 1 entries (0 failed), at 0.000 hits/s, average response time is 0.630 seconds",
-        "operationId": "89aa39f6-78d0-411b-b701-a33bd77868b0",
+        "description": "Mizu observed 1 entries (0 failed), at 0.00 hits/s, average response time is 0.63 seconds",
+        "operationId": "<UUID4>",
        "responses": {
          "200": {
            "description": "Successful call with status 200",
@@ -26,33 +26,33 @@
            }
          }
        },
-        "x-last-seen-ts": 1567750580.0471218,
-        "x-counters-total": {
-          "entries": 1,
-          "failures": 0,
-          "firstSeen": 1567750580.0471218,
-          "lastSeen": 1567750580.0471218,
-          "sumRT": 0.63,
-          "sumDuration": 0
-        },
        "x-counters-per-source": {
          "": {
            "entries": 1,
            "failures": 0,
-            "firstSeen": 1567750580.0471218,
-            "lastSeen": 1567750580.0471218,
+            "firstSeen": 1567750580.04,
+            "lastSeen": 1567750580.04,
            "sumRT": 0.63,
            "sumDuration": 0
          }
        },
+        "x-counters-total": {
+          "entries": 1,
+          "failures": 0,
+          "firstSeen": 1567750580.04,
+          "lastSeen": 1567750580.04,
+          "sumRT": 0.63,
+          "sumDuration": 0
+        },
+        "x-last-seen-ts": 1567750580.04,
        "x-sample-entry": 0
      }
    },
    "/appears-twice": {
      "get": {
        "summary": "/appears-twice",
-        "description": "Mizu observed 2 entries (0 failed), at 0.500 hits/s, average response time is 0.630 seconds",
-        "operationId": "f5e2b5a2-e01a-45f4-bde1-15a7e7a06d3c",
+        "description": "Mizu observed 2 entries (0 failed), at 0.50 hits/s, average response time is 0.63 seconds",
+        "operationId": "<UUID4>",
        "responses": {
          "200": {
            "description": "Successful call with status 200",
@@ -63,33 +63,33 @@
            }
          }
        },
-        "x-counters-total": {
-          "entries": 2,
-          "failures": 0,
-          "firstSeen": 1567750580.7471218,
-          "lastSeen": 1567750581.7471218,
-          "sumRT": 1.26,
-          "sumDuration": 1
-        },
        "x-counters-per-source": {
          "": {
            "entries": 2,
            "failures": 0,
-            "firstSeen": 1567750580.7471218,
-            "lastSeen": 1567750581.7471218,
+            "firstSeen": 1567750580.74,
+            "lastSeen": 1567750581.74,
            "sumRT": 1.26,
            "sumDuration": 1
          }
        },
-        "x-sample-entry": 0,
-        "x-last-seen-ts": 1567750581.7471218
+        "x-counters-total": {
+          "entries": 2,
+          "failures": 0,
+          "firstSeen": 1567750580.74,
+          "lastSeen": 1567750581.74,
+          "sumRT": 1.26,
+          "sumDuration": 1
+        },
+        "x-last-seen-ts": 1567750581.74,
+        "x-sample-entry": 0
      }
    },
    "/body-optional": {
      "post": {
        "summary": "/body-optional",
-        "description": "Mizu observed 3 entries (0 failed), at 0.003 hits/s, average response time is 0.001 seconds",
-        "operationId": "14d5b1c2-dc03-4ee5-baaa-5c7992acc82e",
+        "description": "Mizu observed 3 entries (0 failed), at 0.00 hits/s, average response time is 0.00 seconds",
+        "operationId": "<UUID4>",
        "responses": {
          "200": {
            "description": "Successful call with status 200",
@@ -98,26 +98,26 @@
            }
          }
        },
-        "x-counters-total": {
-          "entries": 3,
-          "failures": 0,
-          "firstSeen": 1567750581.7471218,
-          "lastSeen": 1567750581.757122,
-          "sumRT": 0.003,
-          "sumDuration": 0.010000228881835938
-        },
-        "x-sample-entry": 0,
        "x-counters-per-source": {
          "": {
            "entries": 3,
            "failures": 0,
-            "firstSeen": 1567750581.7471218,
-            "lastSeen": 1567750581.757122,
-            "sumRT": 0.003,
-            "sumDuration": 0.010000228881835938
+            "firstSeen": 1567750581.74,
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-        "operationId": "d0958c5a-dce6-4616-99f4-201dbc51457a",
+        "description": "Mizu observed 1 entries (0 failed), at 0.00 hits/s, average response time is 0.00 seconds",
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-        "operationId": "cab5a2f3-c18a-4d5a-8f92-e40da4fd6603",
+        "description": "Mizu observed 1 entries (0 failed), at 0.00 hits/s, average response time is 0.00 seconds",
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-        "operationId": "7c373ad7-6ab5-422e-971b-1cf56b18a7a2",
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@@ -319,11 +319,347 @@
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+          "param-patterns"
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+        "summary": "/param-patterns/prefix-gibberish-fine/{prefixgibberishfineId}",
+        "description": "Mizu observed 1 entries (0 failed), at 0.00 hits/s, average response time is 0.00 seconds",
+        "operationId": "<UUID4>",
+        "responses": {
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+    "/param-patterns/{parampatternId}": {
+      "get": {
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+        "summary": "/param-patterns/{parampatternId}",
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+            "example #1": {
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+            "example #3": {
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+    "/param-patterns/{parampatternId}/1": {
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+        "summary": "/param-patterns/{parampatternId}/1",
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+            "example #2": {
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+            "example #3": {
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+            "example #4": {
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+        "summary": "/param-patterns/{parampatternId}/static",
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+              "value": "prefix-gibberish-adslkfasdf89sa7dfasddafa8a98sd7kansdf"
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+            "example #2": {
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+            "example #3": {
+              "value": "prefix-gibberish-84395h2j4k35hj243j5h2kl34h54k"
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+            "example #4": {
+              "value": "prefix-gibberish-afterwards"
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+    "/param-patterns/{parampatternId}/{param1}": {
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+            "example #1": {
+              "value": "prefix-gibberish-adslkfasdf89sa7dfasddafa8a98sd7kansdf"
+            },
+            "example #2": {
+              "value": "prefix-gibberish-4jk5l2345h2452l4352435jlk45"
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+            "example #3": {
+              "value": "prefix-gibberish-84395h2j4k35hj243j5h2kl34h54k"
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+            "example #4": {
+              "value": "prefix-gibberish-afterwards"
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+          }
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+              "value": "<UUID4>"
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-        "operationId": "f7e299d2-253c-4eef-975c-9a5659a7fc50",
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@@ -432,8 +768,8 @@
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-        "operationId": "23a54e06-4298-4ea5-b1f0-09b0354a0598",
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-      "entries": 13,
+      "entries": 19,
      "failures": 0,
-      "firstSeen": 1567750483.864529,
-      "lastSeen": 1567750582.7471218,
-      "sumRT": 3.268,
-      "sumDuration": 2.010000228881836
+      "firstSeen": 1567750483.86,
+      "lastSeen": 1567750582.74,
+      "sumRT": 3.27,
+      "sumDuration": 2.01
    }
+  },
+  "x-counters-total": {
+    "entries": 19,
+    "failures": 0,
+    "firstSeen": 1567750483.86,
+    "lastSeen": 1567750582.74,
+    "sumRT": 3.27,
+    "sumDuration": 2.01
  }
 }
--- a/agent/pkg/oas/test_artifacts/trcc.json
+++ b/agent/pkg/oas/test_artifacts/trcc.json
@@ -0,0 +1,50 @@
+{
+  "openapi": "3.1.0",
+  "info": {
+    "title": "Preloaded TRCC",
+    "version": "0.1",
+    "description": "Test file for loading pre-existing OAS"
+  },
+  "paths": {
+    "/models/{id}": {
+      "parameters": [
+        {
+          "name": "id",
+          "in": "path",
+          "required": true,
+          "style": "simple",
+          "schema": {
+            "type": "string",
+            "pattern": ".+(_|-|\\.).+"
+          },
+          "example": "some-uuid-maybe"
+        }
+      ]
+    },
+    "/models/{id}/{id2}": {
+      "parameters": [
+        {
+          "name": "id",
+          "in": "path",
+          "required": true,
+          "style": "simple",
+          "schema": {
+            "type": "string",
+            "pattern": ".+(_|-|\\.).+"
+          },
+          "example": "some-uuid-maybe"
+        },
+        {
+          "name": "id2",
+          "in": "path",
+          "required": true,
+          "style": "simple",
+          "schema": {
+            "type": "string",
+            "pattern": "\\d+"
+          }
+        }
+      ]
+    }
+  }
+}
--- a/agent/pkg/oas/tree.go
+++ b/agent/pkg/oas/tree.go
@@ -1,12 +1,13 @@
 package oas

 import (
-	"net/url"
-	"strconv"
-	"strings"
-
+	"encoding/json"
 	"github.com/chanced/openapi"
 	"github.com/up9inc/mizu/shared/logger"
+	"net/url"
+	"regexp"
+	"strconv"
+	"strings"
 )

 type NodePath = []string
@@ -49,8 +50,8 @@ func (n *Node) getOrSet(path NodePath, existingPathObj *openapi.PathObj) (node *
 		node = n.searchInConstants(pathChunk)
 	}

-	if node == nil {
-		node = n.searchInParams(paramObj, chunkIsGibberish)
+	if node == nil && pathChunk != "" {
+		node = n.searchInParams(paramObj, pathChunk, chunkIsGibberish)
 	}

 	// still no node found, should create it
@@ -76,6 +77,10 @@ func (n *Node) getOrSet(path NodePath, existingPathObj *openapi.PathObj) (node *
 		if err != nil {
 			logger.Log.Warningf("Failed to add example to a parameter: %s", err)
 		}
+
+		if len(*exmp) >= 3 && node.pathParam.Schema.Pattern == nil { // is it enough to decide on 2 samples?
+			node.pathParam.Schema.Pattern = getPatternFromExamples(exmp)
+		}
 	}

 	// TODO: eat up trailing slash, in a smart way: node.pathObj!=nil && path[1]==""
@@ -88,6 +93,57 @@ func (n *Node) getOrSet(path NodePath, existingPathObj *openapi.PathObj) (node *
 	return node
 }

+func getPatternFromExamples(exmp *openapi.Examples) *openapi.Regexp {
+	allInts := true
+	strs := make([]string, 0)
+	for _, example := range *exmp {
+		exampleObj, err := example.ResolveExample(exampleResolver)
+		if err != nil {
+			continue
+		}
+
+		var value string
+		err = json.Unmarshal(exampleObj.Value, &value)
+		if err != nil {
+			logger.Log.Warningf("Failed decoding parameter example into string: %s", err)
+			continue
+		}
+		strs = append(strs, value)
+
+		if _, err := strconv.Atoi(value); err != nil {
+			allInts = false
+		}
+	}
+
+	if allInts {
+		re := new(openapi.Regexp)
+		re.Regexp = regexp.MustCompile(`\d+`)
+		return re
+	} else {
+		prefix := longestCommonXfixStr(strs, true)
+		suffix := longestCommonXfixStr(strs, false)
+
+		pat := ""
+		separators := "-._/:|*,+" // TODO: we could also cut prefix till the last separator
+		if len(prefix) > 0 && strings.Contains(separators, string(prefix[len(prefix)-1])) {
+			pat = "^" + regexp.QuoteMeta(prefix)
+		}
+
+		pat += ".+"
+
+		if len(suffix) > 0 && strings.Contains(separators, string(suffix[0])) {
+			pat += regexp.QuoteMeta(suffix) + "$"
+		}
+
+		if pat != ".+" {
+			re := new(openapi.Regexp)
+			re.Regexp = regexp.MustCompile(pat)
+			return re
+		}
+	}
+	return nil
+}
+
 func (n *Node) createParam() *openapi.ParameterObj {
 	name := "param"

@@ -118,23 +174,30 @@ func (n *Node) createParam() *openapi.ParameterObj {
 	return newParam
 }

-func (n *Node) searchInParams(paramObj *openapi.ParameterObj, chunkIsGibberish bool) *Node {
+func (n *Node) searchInParams(paramObj *openapi.ParameterObj, chunk string, chunkIsGibberish bool) *Node {
 	// look among params
-	if paramObj != nil || chunkIsGibberish {
-		for _, subnode := range n.children {
-			if subnode.constant != nil {
-				continue
-			}
-
-			// TODO: check the regex pattern of param? for exceptions etc
-
-			if paramObj != nil {
-				// TODO: mergeParam(subnode.pathParam, paramObj)
-				return subnode
-			} else {
-				return subnode
-			}
+	for _, subnode := range n.children {
+		if subnode.constant != nil {
+			continue
 		}
+
+		if paramObj != nil {
+			// TODO: mergeParam(subnode.pathParam, paramObj)
+			return subnode
+		} else if subnode.pathParam.Schema.Pattern != nil { // it has defined param pattern, have to respect it
+			// TODO: and not in exceptions
+			if subnode.pathParam.Schema.Pattern.Match([]byte(chunk)) {
+				return subnode
+			} else if chunkIsGibberish {
+				// TODO: what to do if gibberish chunk does not match the pattern and not in exceptions?
+				return nil
+			} else {
+				return nil
+			}
+		} else if chunkIsGibberish {
+			return subnode
+		}
+
 	}
 	return nil
 }
--- a/agent/pkg/oas/utils.go
+++ b/agent/pkg/oas/utils.go
@@ -290,6 +290,53 @@ func longestCommonXfix(strs [][]string, pre bool) []string { // https://github.c
 	return xfix
 }

+func longestCommonXfixStr(strs []string, pre bool) string { // https://github.com/jpillora/longestcommon
+	//short-circuit empty list
+	if len(strs) == 0 {
+		return ""
+	}
+	xfix := strs[0]
+	//short-circuit single-element list
+	if len(strs) == 1 {
+		return xfix
+	}
+	//compare first to rest
+	for _, str := range strs[1:] {
+		xfixl := len(xfix)
+		strl := len(str)
+		//short-circuit empty strings
+		if xfixl == 0 || strl == 0 {
+			return ""
+		}
+		//maximum possible length
+		maxl := xfixl
+		if strl < maxl {
+			maxl = strl
+		}
+		//compare letters
+		if pre {
+			//prefix, iterate left to right
+			for i := 0; i < maxl; i++ {
+				if xfix[i] != str[i] {
+					xfix = xfix[:i]
+					break
+				}
+			}
+		} else {
+			//suffix, iternate right to left
+			for i := 0; i < maxl; i++ {
+				xi := xfixl - i - 1
+				si := strl - i - 1
+				if xfix[xi] != str[si] {
+					xfix = xfix[xi+1:]
+					break
+				}
+			}
+		}
+	}
+	return xfix
+}
+
 func getSimilarPrefix(strs []string) string {
 	chunked := make([][]string, 0)
 	for _, item := range strs {
--- a/cli/cmd/checkRunner.go
+++ b/cli/cmd/checkRunner.go
@@ -4,10 +4,13 @@ import (
 	"context"
 	"embed"
 	"fmt"
+	core "k8s.io/api/core/v1"
 	rbac "k8s.io/api/rbac/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/client-go/kubernetes/scheme"
 	"regexp"
+	"time"

 	"github.com/up9inc/mizu/cli/apiserver"
 	"github.com/up9inc/mizu/cli/config"
@@ -38,6 +41,10 @@ func runMizuCheck() {
 		if checkPassed {
 			checkPassed = checkK8sTapPermissions(ctx, kubernetesProvider)
 		}
+
+		if checkPassed {
+			checkPassed = checkImagePullInCluster(ctx, kubernetesProvider)
+		}
 	} else {
 		if checkPassed {
 			checkPassed = checkK8sResources(ctx, kubernetesProvider)
@@ -315,3 +322,104 @@ func checkPermissionExist(group string, resource string, verb string, exist bool
 	logger.Log.Infof("%v can %v %v in group '%v'", fmt.Sprintf(uiUtils.Green, "√"), verb, resource, group)
 	return true
 }
+
+func checkImagePullInCluster(ctx context.Context, kubernetesProvider *kubernetes.Provider) bool {
+	logger.Log.Infof("\nimage-pull-in-cluster\n--------------------")
+
+	podName := "image-pull-in-cluster"
+
+	defer removeImagePullInClusterResources(ctx, kubernetesProvider, podName)
+	if err := createImagePullInClusterResources(ctx, kubernetesProvider, podName); err != nil {
+		logger.Log.Errorf("%v error while creating image pull in cluster resources, err: %v", fmt.Sprintf(uiUtils.Red, "✗"), err)
+		return false
+	}
+
+	if err := checkImagePulled(ctx, kubernetesProvider, podName); err != nil {
+		logger.Log.Errorf("%v cluster is not able to pull mizu containers from docker hub, err: %v", fmt.Sprintf(uiUtils.Red, "✗"), err)
+		return false
+	}
+
+	logger.Log.Infof("%v cluster is able to pull mizu containers from docker hub", fmt.Sprintf(uiUtils.Green, "√"))
+	return true
+}
+
+func checkImagePulled(ctx context.Context, kubernetesProvider *kubernetes.Provider, podName string) error {
+	podExactRegex := regexp.MustCompile(fmt.Sprintf("^%s$", podName))
+	podWatchHelper := kubernetes.NewPodWatchHelper(kubernetesProvider, podExactRegex)
+	eventChan, errorChan := kubernetes.FilteredWatch(ctx, podWatchHelper, []string{config.Config.MizuResourcesNamespace}, podWatchHelper)
+
+	timeAfter := time.After(30 * time.Second)
+
+	for {
+		select {
+		case wEvent, ok := <-eventChan:
+			if !ok {
+				eventChan = nil
+				continue
+			}
+
+			pod, err := wEvent.ToPod()
+			if err != nil {
+				return err
+			}
+
+			if pod.Status.Phase == core.PodRunning {
+				return nil
+			}
+		case err, ok := <-errorChan:
+			if !ok {
+				errorChan = nil
+				continue
+			}
+
+			return err
+		case <-timeAfter:
+			return fmt.Errorf("image not pulled in time")
+		}
+	}
+}
+
+func removeImagePullInClusterResources(ctx context.Context, kubernetesProvider *kubernetes.Provider, podName string) {
+	if err := kubernetesProvider.RemovePod(ctx, config.Config.MizuResourcesNamespace, podName); err != nil {
+		logger.Log.Debugf("error while removing image pull in cluster resources, err: %v", err)
+	}
+
+	if !config.Config.IsNsRestrictedMode() {
+		if err := kubernetesProvider.RemoveNamespace(ctx, config.Config.MizuResourcesNamespace); err != nil {
+			logger.Log.Debugf("error while removing image pull in cluster resources, err: %v", err)
+		}
+	}
+}
+
+func createImagePullInClusterResources(ctx context.Context, kubernetesProvider *kubernetes.Provider, podName string) error {
+	if !config.Config.IsNsRestrictedMode() {
+		if _, err := kubernetesProvider.CreateNamespace(ctx, config.Config.MizuResourcesNamespace); err != nil {
+			return err
+		}
+	}
+
+	var zero int64
+	pod := &core.Pod{
+		ObjectMeta: metav1.ObjectMeta{
+			Name: podName,
+		},
+		Spec: core.PodSpec{
+			Containers: []core.Container{
+				{
+					Name:            "probe",
+					Image:           "up9inc/busybox",
+					ImagePullPolicy: "Always",
+					Command:         []string{"cat"},
+					Stdin:           true,
+				},
+			},
+			TerminationGracePeriodSeconds: &zero,
+		},
+	}
+
+	if _, err := kubernetesProvider.CreatePod(ctx, config.Config.MizuResourcesNamespace, pod); err != nil {
+		return err
+	}
+
+	return nil
+}