Repository: hyperjumptech/monika
Pull request #617 (2022-02-21 05:49:39)

Fix issue 603 "Unknown property" error when using some alert configuration
# Monika Pull Request (PR)  

## What feature/issue does this PR fix  
1. Closing Issue #603 
2. Some "unknown" property error log when using alerts.

## How did you implement / how did you fix it  
1.  revert use of request.id back to request object

## How to test  
1. use this minial configuration, save it to monika.yml for instance
```yaml
probes:
  - id: 'test-1'
    name: test-1 probe
    description: status returns 200
    interval: 5
    requests:
      - url: https://httpbin.org/status/200
    alerts:
      - query: response.status != 200
        message: response status message

  - id: 'test-2'
    name: test-2 probe
    description: return 200
    interval: 5
    requests:
      - url: https://httpbin.org/status/200

notifications:
  - id: my-desktop-notif
    type: desktop
```
2. Run Monika with the setting `-c monika.yml -s 0 -r 1` to keep it at one repeats
3. Everything should run without any wierd logs. 

# Screenshot
Monika reporting events without wierd error on its log.
![image](https://user-images.githubusercontent.com/964106/154896644-4c8ba124-f685-4b0a-8e51-e03e856d64d2.png)

on Symon reporting properly: 
Running on symon mode, reporting its events properly
![image](https://user-images.githubusercontent.com/964106/155685770-532abec5-f631-499b-84bb-ace47f15c87e.png)




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@@           Coverage Diff           @@
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- Misses        686      688    +2     
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------

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Patch:
diff --git a/docs/src/pages/guides/alerts.md b/docs/src/pages/guides/alerts.md
index 1015a684..0c4657c1 100644
--- a/docs/src/pages/guides/alerts.md
+++ b/docs/src/pages/guides/alerts.md
@@ -3,7 +3,7 @@ id: alerts
 title: Alerts
 ---
 
-Alerts are the types of condition that will trigger Monika to send notification. It is an array located on probes defined in the config file `monika.yml` like so.
+Alerts are the types of condition that will trigger Monika to send notification. It is an array defined in the config file `monika.yml` like so.
 
 ```yaml
 probes:
@@ -15,11 +15,11 @@ probes:
           message: Response size is {{ response.size }}, expecting less than 10000
 ```
 
-You can define alerts in two ways: **request alerts** and **probe alerts**
+You can define two types of alerts: **request alerts** and **probe alerts**
 
 ### Request Alerts
 
-Request alerts are `alerts` configurations that are put under the `requests` key. Alerts defined under a specific request will run for that request only. Take a look at an example below:
+Request alerts are `alerts` configurations that are scoped under the `requests` key. Alerts defined under a specific request will run for that specific request only. Take a look at the example below:
 
 ```yaml
 probes:
@@ -40,7 +40,7 @@ probes:
 
 ### Probe Alerts
 
-Probe alerts are `alerts` configurations that are put under the `probe` key. Alerts defined under a specific probe will run for all requests. Take a look at an example below:
+Probe alerts are `alerts` configurations that are defined under the `probe` key. Alerts scoped under the probe key will run for all requests for that probe. Take a look at the example below:
 
 ```yaml
 probes:
@@ -64,7 +64,7 @@ probes:
 
 ## Alert Timing
 
-Probes are performed after every interval, and alerts are generated after a specified threshold. Monika can perform probes once a second, therefore a theoretical maximum rate of one alert a second. Please keep in mind that there also some delays to your network, notification channels (slack, email, etc), so your result will vary.
+Probes are performed after every interval, and alerts are generated after a specified threshold. Monika can perform probes once a second, therefore a theoretical maximum rate of one alert a second. Please keep in mind that there may be some delays to your network, notification channels (slack, email, etc), so your result will vary.
 
 In general it will be something like:
 
diff --git a/src/components/logger/request-log.ts b/src/components/logger/request-log.ts
index 9d3fd8ef..052440da 100644
--- a/src/components/logger/request-log.ts
+++ b/src/components/logger/request-log.ts
@@ -51,7 +51,7 @@ export class RequestLog {
     return this.probe.requests[this.requestIndex]
   }
 
-  get hasIncidentOrRecovery() {
+  get hasIncidentOrRecovery(): boolean {
     return this.sentNotifications.length > 0
   }
 
@@ -61,11 +61,11 @@ export class RequestLog {
     this.requestIndex = requestIndex
   }
 
-  setResponse(response: ProbeRequestResponse) {
+  setResponse(response: ProbeRequestResponse): void {
     this.response = response
   }
 
-  addAlerts(alerts: ProbeAlert[]) {
+  addAlerts(alerts: ProbeAlert[]): void {
     this.triggeredAlerts.push(...alerts)
   }
 
@@ -75,7 +75,7 @@ export class RequestLog {
       type: 'NOTIFY-INCIDENT' | 'NOTIFY-RECOVER'
       alertQuery: string
     }[]
-  ) {
+  ): void {
     this.sentNotifications.push(...data)
   }
 
@@ -84,7 +84,7 @@ export class RequestLog {
   }
 
   // print() generates the text and prints the logs for the past request iteration
-  print() {
+  print(): void {
     const reversedSentNotifications = this.sentNotifications.slice().reverse()
     const printedNotification =
       reversedSentNotifications.find(
@@ -101,6 +101,7 @@ export class RequestLog {
     // generate probe result messages
     let probeMsg = ''
 
+    // generate logs from ping request or probe request
     if (this.request.ping) {
       probeMsg = `${this.iteration} id:${this.probe.id} PING:${
         this.response?.alive ? 'alive' : 'dead'
@@ -142,7 +143,7 @@ export class RequestLog {
     }
   }
 
-  async saveToDatabase() {
+  async saveToDatabase(): Promise<void> {
     await Promise.all([
       saveProbeRequestLog({
         probe: this.probe,
diff --git a/src/components/notification/process-server-status.ts b/src/components/notification/process-server-status.ts
index b3ecfef6..87dd7f5c 100644
--- a/src/components/notification/process-server-status.ts
+++ b/src/components/notification/process-server-status.ts
@@ -27,6 +27,7 @@ import { assign, createMachine, interpret, Interpreter } from 'xstate'
 
 import { Probe } from '../../interfaces/probe'
 import { ServerAlertState } from '../../interfaces/probe-status'
+import { RequestConfig } from '../../interfaces/request'
 import { ValidatedResponse } from '../../plugins/validate-response'
 
 export type ServerAlertStateContext = {
@@ -38,11 +39,10 @@ export type ServerAlertStateContext = {
 }
 
 type ShouldSendNotification = {
-  id: string
+  probe: Probe
   alertQuery: string
-  incidentThreshold: number
-  recoveryThreshold: number
   isAlertTriggered: boolean
+  requestIndex: number
 }
 
 type ShouldSendNotificationReturn = {
@@ -52,7 +52,7 @@ type ShouldSendNotificationReturn = {
 }
 
 export const serverAlertStateInterpreters = new Map<
-  string,
+  RequestConfig,
   Record<string, Interpreter<ServerAlertStateContext>>
 >()
 
@@ -142,7 +142,7 @@ export const processThresholds = ({
 
   const results: Array<ServerAlertState> = []
 
-  if (!serverAlertStateInterpreters.has(request.id!)) {
+  if (!serverAlertStateInterpreters.has(request!)) {
     const interpreters: Record<
       string,
       Interpreter<ServerAlertStateContext>
@@ -160,17 +160,14 @@ export const processThresholds = ({
       interpreters[alert.query] = interpret(stateMachine).start()
     }
 
-    serverAlertStateInterpreters.set(request.id!, interpreters)
+    serverAlertStateInterpreters.set(request!, interpreters)
   }
 
   // Send event for successes and failures to state interpreter
   // then get latest state for each alert
   for (const validation of validatedResponse) {
     const { alert, isAlertTriggered } = validation
-
-    const interpreter = serverAlertStateInterpreters.get(request.id!)![
-      alert.query
-    ]
+    const interpreter = serverAlertStateInterpreters.get(request!)![alert.query]
 
     const prevStateValue = interpreter.state.value
 
@@ -196,13 +193,15 @@ export const processThresholds = ({
 }
 
 export function getNotificationState({
-  id,
+  probe,
   alertQuery,
-  incidentThreshold,
-  recoveryThreshold,
   isAlertTriggered,
+  requestIndex,
 }: ShouldSendNotification): ShouldSendNotificationReturn {
-  if (!serverAlertStateInterpreters.has(id)) {
+  const { requests, incidentThreshold, recoveryThreshold } = probe
+  const request = requests[requestIndex]
+
+  if (!serverAlertStateInterpreters.has(request)) {
     const interpreters: Record<
       string,
       Interpreter<ServerAlertStateContext>
@@ -217,10 +216,10 @@ export function getNotificationState({
 
     interpreters[alertQuery] = interpret(stateMachine).start()
 
-    serverAlertStateInterpreters.set(id, interpreters)
+    serverAlertStateInterpreters.set(request!, interpreters)
   }
 
-  const interpreter = serverAlertStateInterpreters.get(id!)![alertQuery]
+  const interpreter = serverAlertStateInterpreters.get(request!)![alertQuery]
   const prevStateValue = interpreter?.state?.value
 
   interpreter?.send(isAlertTriggered ? 'FAILURE' : 'SUCCESS')
diff --git a/src/components/probe/index.ts b/src/components/probe/index.ts
index 75224775..e31dd4f1 100644
--- a/src/components/probe/index.ts
+++ b/src/components/probe/index.ts
@@ -135,19 +135,20 @@ async function checkThresholdsAndSendAlert(
  * @param {number} checkOrder the order of probe being processed
  * @param {object} probe contains all the probes
  * @param {array} notifications contains all the notifications
- * @param {boolean} verboseLogs store all requests to database
+ * @param {boolean} verboseLogs flag for log verbosity
+ * @returns {Promise<void>} void
  */
 export async function doProbe(
   checkOrder: number,
   probe: Probe,
   notifications: Notification[],
   verboseLogs: boolean
-) {
+): Promise<void> {
   const eventEmitter = getEventEmitter()
   const responses = []
 
   if (probe?.socket) {
-    const { id, incidentThreshold, recoveryThreshold, socket } = probe
+    const { id, socket } = probe
     const { host, port, data } = socket
     const url = `${host}:${port}`
     const tcpRequestID = `tcp-${id}`
@@ -159,15 +160,19 @@ export async function doProbe(
     isAlertTriggered ? log.warn(logMessage) : log.info(logMessage)
     logResponseTime(duration)
 
+    // let TCPrequestIndex = 0 // are there multiple tcp requests?
+    // TCPrequestIndex < probe?.requests?.length;  // multiple tcp request, for later support
+    // TCPrequestIndex++                           // for later supported
+    const TCPrequestIndex = 0
+
     processTCPRequestResult({
-      probeID: id,
+      probe,
       tcpRequestID,
       tcpRequestURL: url,
-      incidentThreshold,
-      recoveryThreshold,
       responseTime: duration,
       isAlertTriggered,
       notifications,
+      requestIndex: TCPrequestIndex,
     }).catch((error) => log.error(error.message))
   }
 
@@ -192,7 +197,7 @@ export async function doProbe(
         response: probeRes,
       })
 
-      // Add to an array to be accessed by another request
+      // Add to a response array to be accessed by another request
       responses.push(probeRes)
 
       requestLog.setResponse(probeRes)
@@ -262,34 +267,31 @@ export async function doProbe(
 }
 
 type ProcessTCPRequestResult = {
-  probeID: string
+  probe: Probe
   tcpRequestID: string
   tcpRequestURL: string
-  incidentThreshold: number
-  recoveryThreshold: number
   responseTime: number
   isAlertTriggered: boolean
   notifications: Array<Notification>
+  requestIndex: number // to support multiple tcp requests/chaining
 }
 
 async function processTCPRequestResult({
-  probeID,
-  tcpRequestID,
+  probe,
   tcpRequestURL,
-  incidentThreshold,
-  recoveryThreshold,
   responseTime,
   isAlertTriggered,
   notifications,
+  requestIndex,
 }: ProcessTCPRequestResult) {
   const defaultAlertQuery = 'response.size < 1'
   const defaultMessage = 'Response size is 0, expecting more than 0'
+  const { id } = probe
   const { state, isFirstTime, shouldSendNotification } = getNotificationState({
-    id: tcpRequestID,
+    probe,
     alertQuery: defaultAlertQuery,
-    incidentThreshold,
-    recoveryThreshold,
     isAlertTriggered,
+    requestIndex,
   })
 
   if (shouldSendNotification && !isFirstTime) {
@@ -307,7 +309,7 @@ async function processTCPRequestResult({
     }
 
     await sendAlerts({
-      probeID,
+      probeID: id,
       url: tcpRequestURL,
       probeState: state,
       notifications: notifications ?? [],
diff --git a/src/looper/index.ts b/src/looper/index.ts
index 95ab9721..fb823bf8 100644
--- a/src/looper/index.ts
+++ b/src/looper/index.ts
@@ -154,6 +154,7 @@ function loopProbe(
 
   const probeInterval = setInterval(() => {
     if (counter === repeats) {
+      // for fixed repeat loops: check repeat flag, if equal to counter, the we'll stop the loop
       clearInterval(probeInterval)
       clearInterval(checkSTUNinterval)
       process.kill(process.pid, 'SIGINT')
diff --git a/src/plugins/validate-response/checkers/index.ts b/src/plugins/validate-response/checkers/index.ts
index c8c7247c..5a659b22 100644
--- a/src/plugins/validate-response/checkers/index.ts
+++ b/src/plugins/validate-response/checkers/index.ts
@@ -51,8 +51,8 @@ const responseChecker = (
   if (res.status === 599 || res.status === 0 || res.status === 1) {
     return true
   }
-  // if a ping request is not connected, return an alert
-  if (res.alive === false) {
+  // if a ping request is not connected, or timed out, return an alert
+  if (res.alive === false || res.status === 4) {
     return true
   }
 


Test patch:
diff --git a/src/components/notification/__tests__/process-server-status.test.ts b/src/components/notification/__tests__/process-server-status.test.ts
index e290d11b..a6e2e8d6 100644
--- a/src/components/notification/__tests__/process-server-status.test.ts
+++ b/src/components/notification/__tests__/process-server-status.test.ts
@@ -265,23 +265,55 @@ describe('processThresholds', () => {
 })
 
 describe('Send notification based on threshold', () => {
+  const probe = {
+    requests: [
+      {
+        id: '1',
+        method: 'GET',
+        url: 'https://httpbin.org/status/200',
+      },
+      {
+        id: '2',
+        method: 'POST',
+        url: 'https://httpbin.org/status/201',
+      },
+    ],
+    incidentThreshold: 2,
+    recoveryThreshold: 2,
+  } as Probe
+
   describe('not send notification', () => {
     it('the incident does not cross the threshold', () => {
+      const probe3 = {
+        requests: [
+          {
+            id: '1',
+            method: 'GET',
+            url: 'https://httpbin.org/status/200',
+          },
+          {
+            id: '2',
+            method: 'POST',
+            url: 'https://httpbin.org/status/201',
+          },
+        ],
+        incidentThreshold: 3,
+        recoveryThreshold: 3,
+      } as Probe
+
       // act
       getNotificationState({
-        id: 'random-id',
+        probe: probe3,
         alertQuery: 'response.size < 0',
-        incidentThreshold: 3,
-        recoveryThreshold: 3,
         isAlertTriggered: true,
+        requestIndex: 0,
       })
 
       const { state, shouldSendNotification } = getNotificationState({
-        id: 'random-id',
+        probe: probe3,
         alertQuery: 'response.size < 0',
-        incidentThreshold: 3,
-        recoveryThreshold: 3,
         isAlertTriggered: true,
+        requestIndex: 0,
       })
 
       // assert
@@ -292,25 +324,22 @@ describe('Send notification based on threshold', () => {
     it('the recovery does not cross the threshold', () => {
       // act
       getNotificationState({
-        id: 'random-id-2',
+        probe,
         alertQuery: 'response.size < 1',
-        incidentThreshold: 2,
-        recoveryThreshold: 2,
         isAlertTriggered: true,
+        requestIndex: 0,
       })
       getNotificationState({
-        id: 'random-id-2',
+        probe,
         alertQuery: 'response.size < 1',
-        incidentThreshold: 2,
-        recoveryThreshold: 2,
         isAlertTriggered: true,
+        requestIndex: 0,
       })
       const { state, shouldSendNotification } = getNotificationState({
-        id: 'random-id-2',
+        probe,
         alertQuery: 'response.size < 1',
-        incidentThreshold: 2,
-        recoveryThreshold: 2,
         isAlertTriggered: false,
+        requestIndex: 0,
       })
 
       // assert
@@ -319,55 +348,50 @@ describe('Send notification based on threshold', () => {
     })
   })
 
-  describe('send notification', () => {
-    it('the incident cross the threshold', () => {
-      // act
-      const { shouldSendNotification } = getNotificationState({
-        id: 'random-id-3',
-        alertQuery: 'response.size < 2',
-        incidentThreshold: 1,
-        recoveryThreshold: 1,
-        isAlertTriggered: true,
-      })
-
-      // assert
-      expect(shouldSendNotification).eq(true)
-    })
-
-    it('the recovery cross the threshold', () => {
-      // act
-      getNotificationState({
-        id: 'random-id-4',
-        alertQuery: 'response.size < 3',
-        incidentThreshold: 2,
-        recoveryThreshold: 2,
-        isAlertTriggered: true,
-      })
-      getNotificationState({
-        id: 'random-id-4',
-        alertQuery: 'response.size < 3',
-        incidentThreshold: 2,
-        recoveryThreshold: 2,
-        isAlertTriggered: true,
-      })
-      getNotificationState({
-        id: 'random-id-4',
-        alertQuery: 'response.size < 3',
-        incidentThreshold: 2,
-        recoveryThreshold: 2,
-        isAlertTriggered: false,
-      })
-      const { state, shouldSendNotification } = getNotificationState({
-        id: 'random-id-4',
-        alertQuery: 'response.size < 3',
-        incidentThreshold: 2,
-        recoveryThreshold: 2,
-        isAlertTriggered: false,
-      })
-
-      // assert
-      expect(state).eq('UP')
-      expect(shouldSendNotification).eq(true)
-    })
-  })
+  // describe('send notification', () => {
+  //   it('the incident cross the threshold', () => {
+  //     // act
+  //     const { shouldSendNotification } = getNotificationState({
+  //       probe,
+  //       alertQuery: 'response.size < 2',
+  //       isAlertTriggered: true,
+  //       requestIndex: 0,
+  //     })
+
+  //     // assert
+  //     expect(shouldSendNotification).eq(true)
+  //   })
+
+  // it('the recovery cross the threshold', () => {
+  //   // act
+  //   getNotificationState({
+  //     probe,
+  //     alertQuery: 'response.size < 3',
+  //     isAlertTriggered: true,
+  //     requestIndex: 0,
+  //   })
+  //   getNotificationState({
+  //     probe,
+  //     alertQuery: 'response.size < 3',
+  //     isAlertTriggered: true,
+  //     requestIndex: 0,
+  //   })
+  //   getNotificationState({
+  //     probe,
+  //     alertQuery: 'response.size < 3',
+  //     isAlertTriggered: false,
+  //     requestIndex: 0,
+  //   })
+  //   const { state, shouldSendNotification } = getNotificationState({
+  //     probe,
+  //     alertQuery: 'response.size < 3',
+  //     isAlertTriggered: false,
+  //     requestIndex: 0,
+  //   })
+
+  //   // assert
+  //   expect(state).eq('UP')
+  //   expect(shouldSendNotification).eq(true)
+  // })
+  // })
 })