feat: collect response metrics from cron locations
This commit is contained in:
Adam Janis
parent
35c620f485
commit
7051f275e7
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@ -0,0 +1,3 @@
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# Ignore generated files
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out
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public
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@ -14,22 +14,22 @@ appearance, race, religion, or sexual identity and orientation.
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Examples of behavior that contributes to creating a positive environment
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include:
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* Using welcoming and inclusive language
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* Being respectful of differing viewpoints and experiences
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* Gracefully accepting constructive criticism
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* Focusing on what is best for the community
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* Showing empathy towards other community members
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- Using welcoming and inclusive language
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- Being respectful of differing viewpoints and experiences
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- Gracefully accepting constructive criticism
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- Focusing on what is best for the community
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- Showing empathy towards other community members
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Examples of unacceptable behavior by participants include:
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* The use of sexualized language or imagery and unwelcome sexual attention or
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advances
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* Trolling, insulting/derogatory comments, and personal or political attacks
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* Public or private harassment
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* Publishing others' private information, such as a physical or electronic
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address, without explicit permission
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* Other conduct which could reasonably be considered inappropriate in a
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professional setting
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- The use of sexualized language or imagery and unwelcome sexual attention or
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advances
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- Trolling, insulting/derogatory comments, and personal or political attacks
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- Public or private harassment
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- Publishing others' private information, such as a physical or electronic
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address, without explicit permission
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- Other conduct which could reasonably be considered inappropriate in a
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professional setting
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## Our Responsibilities
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38
README.md
38
README.md
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@ -10,15 +10,15 @@ Monitor your websites, showcase status including daily history, and get Slack no
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You'll need a [Cloudflare Workers account](https://dash.cloudflare.com/sign-up/workers) with
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* A workers domain set up
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* The Workers Bundled subscription \($5/mo\)
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* [It works with Workers Free!](https://blog.cloudflare.com/workers-kv-free-tier/) Check [more info](#workers-kv-free-tier) on how to run on Workers Free.
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* Some websites/APIs to watch 🙂
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- A workers domain set up
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- The Workers Bundled subscription \($5/mo\)
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- [It works with Workers Free!](https://blog.cloudflare.com/workers-kv-free-tier/) Check [more info](#workers-kv-free-tier) on how to run on Workers Free.
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- Some websites/APIs to watch 🙂
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Also, prepare the following secrets
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* Cloudflare API token with `Edit Cloudflare Workers` permissions
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* Slack incoming webhook \(optional\)
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- Cloudflare API token with `Edit Cloudflare Workers` permissions
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- Slack incoming webhook \(optional\)
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## Getting started
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@ -39,6 +39,7 @@ You can either deploy with **Cloudflare Deploy Button** using GitHub Actions or
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- Name: SECRET_SLACK_WEBHOOK_URL (optional)
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- Value: your-slack-webhook-url
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```
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3. Navigate to the **Actions** settings in your repository and enable them
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4. Edit [config.yaml](./config.yaml) to adjust configuration and list all of your websites/APIs you want to monitor
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@ -73,32 +74,35 @@ You can either deploy with **Cloudflare Deploy Button** using GitHub Actions or
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5. Push to `main` branch to trigger the deployment
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6. 🎉
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7. _\(optional\)_ Go to [Cloudflare Workers settings](https://dash.cloudflare.com/?to=/workers) and assign custom domain/route
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* e.g. `status-page.eidam.dev/*` _\(make sure you include `/*` as the Worker also serve static files\)_
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- e.g. `status-page.eidam.dev/*` _\(make sure you include `/*` as the Worker also serve static files\)_
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8. _\(optional\)_ Edit [wrangler.toml](./wrangler.toml) to adjust Worker settings or CRON Trigger schedule, especially if you are on [Workers Free plan](#workers-kv-free-tier)
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### Deploy on your own
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You can clone the repository yourself and use Wrangler CLI to develop/deploy, extra list of things you need to take care of:
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* create KV namespace and add the `KV_STATUS_PAGE` binding to [wrangler.toml](./wrangler.toml)
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* create Worker secrets _\(optional\)_
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* `SECRET_SLACK_WEBHOOK_URL`
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- create KV namespace and add the `KV_STATUS_PAGE` binding to [wrangler.toml](./wrangler.toml)
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- create Worker secrets _\(optional\)_
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- `SECRET_SLACK_WEBHOOK_URL`
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## Workers KV free tier
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The Workers Free plan includes limited KV usage, but the quota is sufficient for 2-minute checks only
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* Change the CRON trigger to 2 minutes interval (`crons = ["*/2 * * * *"]`) in [wrangler.toml](./wrangler.toml)
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The Workers Free plan includes limited KV usage, but the quota is sufficient for 2-minute checks only
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- Change the CRON trigger to 2 minutes interval (`crons = ["*/2 * * * *"]`) in [wrangler.toml](./wrangler.toml)
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## Known issues
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* **Max 25 monitors to watch in case you are using Slack notifications**, due to the limit of subrequests Cloudflare Worker can make \(50\).
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- **Max 25 monitors to watch in case you are using Slack notifications**, due to the limit of subrequests Cloudflare Worker can make \(50\).
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The plan is to support up to 49 by sending only one Slack notification per scheduled run.
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* **KV replication lag** - You might get Slack notification instantly, however it may take couple of more seconds to see the change on your status page as [Cron Triggers are usually running on underutilized quiet hours machines](https://blog.cloudflare.com/introducing-cron-triggers-for-cloudflare-workers/#how-are-you-able-to-offer-this-feature-at-no-additional-cost).
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- **KV replication lag** - You might get Slack notification instantly, however it may take couple of more seconds to see the change on your status page as [Cron Triggers are usually running on underutilized quiet hours machines](https://blog.cloudflare.com/introducing-cron-triggers-for-cloudflare-workers/#how-are-you-able-to-offer-this-feature-at-no-additional-cost).
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* **Initial delay (no data)** - It takes couple of minutes to schedule and run CRON Triggers for the first time
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- **Initial delay (no data)** - It takes couple of minutes to schedule and run CRON Triggers for the first time
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## Future plans
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Stay tuned for more features coming in, like leveraging the fact that CRON instances are scheduled around the world during the day
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so we can monitor the response times. However, we will most probably wait for the [Durable Objects](https://blog.cloudflare.com/introducing-workers-durable-objects/) to be in open beta
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as they are better fit to reliably store such info.
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so we can monitor the response times. However, we will most probably wait for the [Durable Objects](https://blog.cloudflare.com/introducing-workers-durable-objects/) to be in open beta
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as they are better fit to reliably store such info.
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@ -1,4 +1,3 @@
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# Table of contents
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* [Cloudflare Worker - Status Page](README.md)
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- [Cloudflare Worker - Status Page](README.md)
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@ -3,6 +3,7 @@ settings:
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url: 'https://status-page.eidam.dev' # used for Slack messages
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logo: logo-192x192.png # image in ./public/ folder
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daysInHistogram: 90 # number of days you want to display in histogram
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collectResponseTimes: false # experimental feature, enable only for <5 monitors or on paid plans
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allmonitorsOperational: 'All Systems Operational'
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notAllmonitorsOperational: 'Not All Systems Operational'
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@ -11,7 +12,7 @@ settings:
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monitorLabelNoData: 'No data'
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dayInHistogramNoData: 'No data'
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dayInHistogramOperational: 'All good'
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dayInHistogramNotOperational: 'Some checks failed'
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dayInHistogramNotOperational: ' incident(s)' # xx incident(s) recorded
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monitors:
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- id: workers-cloudflare-com # unique identifier
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@ -2,7 +2,7 @@ import { Store } from 'laco'
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import { useStore } from 'laco-react'
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import Head from 'flareact/head'
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import { getMonitors, useKeyPress, switchTheme } from '../src/functions/helpers'
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import { getKVMonitors, useKeyPress } from '../src/functions/helpers'
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import config from '../config.yaml'
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import MonitorCard from '../src/components/monitorCard'
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import MonitorFilter from '../src/components/monitorFilter'
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@ -24,23 +24,20 @@ const filterByTerm = (term) =>
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export async function getEdgeProps() {
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// get KV data
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const {
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value: kvMonitors,
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metadata: kvMonitorsMetadata,
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} = await getMonitors()
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const kvMonitors = await getKVMonitors()
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return {
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props: {
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config,
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kvMonitors: kvMonitors || {},
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kvMonitorsMetadata: kvMonitorsMetadata || {},
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kvMonitors: kvMonitors ? kvMonitors.monitors : {},
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kvMonitorsLastUpdate: kvMonitors ? kvMonitors.lastUpdate : {},
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},
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// Revalidate these props once every x seconds
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revalidate: 5,
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}
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}
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export default function Index({ config, kvMonitors, kvMonitorsMetadata }) {
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export default function Index({ config, kvMonitors, kvMonitorsLastUpdate }) {
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const state = useStore(MonitorStore)
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const slash = useKeyPress('/')
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@ -81,7 +78,7 @@ export default function Index({ config, kvMonitors, kvMonitorsMetadata }) {
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<MonitorFilter active={slash} callback={filterByTerm} />
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</div>
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</div>
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<MonitorStatusHeader kvMonitorsMetadata={kvMonitorsMetadata} />
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<MonitorStatusHeader kvMonitorsLastUpdate={kvMonitorsLastUpdate} />
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{state.visible.map((monitor, key) => {
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return (
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<MonitorCard
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@ -58,7 +58,7 @@
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.tooltip .content {
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@apply invisible absolute z-50 inline-block;
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@apply rounded-full py-1 px-2 bg-gray-100 dark:bg-gray-800 shadow;
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@apply rounded-lg py-1 px-2 bg-gray-100 dark:bg-gray-800 shadow;
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@apply opacity-0 transition-all duration-200 scale-50;
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}
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@ -16,14 +16,17 @@ export default function MonitorHistogram({ monitorId, kvMonitor }) {
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let bg = ''
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let dayInHistogramLabel = config.settings.dayInHistogramNoData
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// filter all dates before first check, check the rest
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// filter all dates before first check, then check the rest
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if (kvMonitor && kvMonitor.firstCheck <= dayInHistogram) {
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if (!kvMonitor.failedDays.includes(dayInHistogram)) {
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if (
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kvMonitor.checks.hasOwnProperty(dayInHistogram) &&
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kvMonitor.checks[dayInHistogram].fails > 0
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) {
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bg = 'yellow'
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dayInHistogramLabel = `${kvMonitor.checks[dayInHistogram].fails} ${config.settings.dayInHistogramNotOperational}`
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} else {
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bg = 'green'
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dayInHistogramLabel = config.settings.dayInHistogramOperational
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} else {
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bg = 'yellow'
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dayInHistogramLabel = config.settings.dayInHistogramNotOperational
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}
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}
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@ -36,6 +39,15 @@ export default function MonitorHistogram({ monitorId, kvMonitor }) {
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<span className="font-semibold text-sm">
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{dayInHistogramLabel}
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</span>
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{kvMonitor.checks.hasOwnProperty(dayInHistogram) &&
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Object.keys(kvMonitor.checks[dayInHistogram].res).map((key) => {
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return (
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<>
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<br />
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{key}: {kvMonitor.checks[dayInHistogram].res[key].a}ms
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</>
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)
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})}
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</div>
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</div>
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)
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@ -7,11 +7,11 @@ const classes = {
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'bg-yellow-200 text-yellow-700 dark:bg-yellow-700 dark:text-yellow-200 border-yellow-300 dark:border-yellow-600',
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}
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export default function MonitorStatusHeader({ kvMonitorsMetadata }) {
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export default function MonitorStatusHeader({ kvMonitorsLastUpdate }) {
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let color = 'green'
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let text = config.settings.allmonitorsOperational
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if (!kvMonitorsMetadata.monitorsOperational) {
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if (!kvMonitorsLastUpdate.allOperational) {
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color = 'yellow'
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text = config.settings.notAllmonitorsOperational
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}
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@ -20,13 +20,11 @@ export default function MonitorStatusHeader({ kvMonitorsMetadata }) {
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<div className={`card mb-4 font-semibold ${classes[color]}`}>
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<div className="flex flex-row justify-between items-center">
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<div>{text}</div>
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{kvMonitorsMetadata.lastUpdate && typeof window !== 'undefined' && (
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{kvMonitorsLastUpdate.time && typeof window !== 'undefined' && (
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<div className="text-xs font-light">
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checked{' '}
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{Math.round(
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(Date.now() - kvMonitorsMetadata.lastUpdate.time) / 1000,
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)}{' '}
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sec ago (from {kvMonitorsMetadata.lastUpdate.loc})
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{Math.round((Date.now() - kvMonitorsLastUpdate.time) / 1000)} sec
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ago (from {kvMonitorsLastUpdate.loc})
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</div>
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)}
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</div>
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@ -12,7 +12,7 @@ export default function MonitorStatusLabel({ kvMonitor }) {
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let text = 'No data'
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if (typeof kvMonitor !== 'undefined') {
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if (kvMonitor.operational) {
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if (kvMonitor.lastCheck.operational) {
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color = 'green'
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text = config.settings.monitorLabelOperational
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} else {
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@ -1,33 +1,40 @@
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import config from '../../config.yaml'
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import { setKV, getKVWithMetadata, notifySlack } from './helpers'
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import {
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notifySlack,
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getCheckLocation,
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getKVMonitors,
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setKVMonitors,
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} from './helpers'
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function getDate() {
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return new Date().toISOString().split('T')[0]
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}
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export async function processCronTrigger(event) {
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// Get Worker PoP and save it to monitorsStateMetadata
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const checkLocation = await getCheckLocation()
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const checkDay = getDate()
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// Get monitors state from KV
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let {
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value: monitorsState,
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metadata: monitorsStateMetadata,
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} = await getKVWithMetadata('monitors_data', 'json')
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let monitorsState = await getKVMonitors()
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// Create empty state objects if not exists in KV storage yet
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if (!monitorsState) {
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monitorsState = {}
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}
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if (!monitorsStateMetadata) {
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monitorsStateMetadata = {}
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monitorsState = { lastUpdate: {}, monitors: {} }
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}
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// Reset default all monitors state to true
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monitorsStateMetadata.monitorsOperational = true
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monitorsState.lastUpdate.allOperational = true
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for (const monitor of config.monitors) {
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// Create default monitor state if does not exist yet
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if (typeof monitorsState[monitor.id] === 'undefined') {
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monitorsState[monitor.id] = { failedDays: [] }
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if (typeof monitorsState.monitors[monitor.id] === 'undefined') {
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monitorsState.monitors[monitor.id] = {
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firstCheck: checkDay,
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lastCheck: {},
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checks: {},
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}
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}
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console.log(`Checking ${monitor.name} ...`)
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@ -41,52 +48,90 @@ export async function processCronTrigger(event) {
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},
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}
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// Perform a check and measure time
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const requestStartTime = Date.now()
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const checkResponse = await fetch(monitor.url, init)
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const requestTime = Math.round(Date.now() - requestStartTime)
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// Determine whether operational and status changed
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const monitorOperational =
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checkResponse.status === (monitor.expectStatus || 200)
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const monitorStatusChanged =
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monitorsState.monitors[monitor.id].lastCheck.operational !==
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monitorOperational
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// Save monitor's last check response status
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monitorsState.monitors[monitor.id].lastCheck = {
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status: checkResponse.status,
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statusText: checkResponse.statusText,
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operational: monitorOperational,
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}
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// Send Slack message on monitor change
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if (
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monitorsState[monitor.id].operational !== monitorOperational &&
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monitorStatusChanged &&
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typeof SECRET_SLACK_WEBHOOK_URL !== 'undefined' &&
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SECRET_SLACK_WEBHOOK_URL !== 'default-gh-action-secret'
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) {
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event.waitUntil(notifySlack(monitor, monitorOperational))
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}
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monitorsState[monitor.id].operational =
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checkResponse.status === (monitor.expectStatus || 200)
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monitorsState[monitor.id].firstCheck =
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monitorsState[monitor.id].firstCheck || getDate()
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// make sure checkDay exists in checks in cases when needed
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if (
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(config.settings.collectResponseTimes || !monitorOperational) &&
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!monitorsState.monitors[monitor.id].checks.hasOwnProperty(checkDay)
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) {
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monitorsState.monitors[monitor.id].checks[checkDay] = {
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fails: 0,
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res: {},
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}
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}
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// Set monitorsOperational and push current day to failedDays
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if (!monitorOperational) {
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monitorsStateMetadata.monitorsOperational = false
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if (config.settings.collectResponseTimes && monitorOperational) {
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// make sure location exists in current checkDay
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if (
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!monitorsState.monitors[monitor.id].checks[checkDay].res.hasOwnProperty(
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checkLocation,
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)
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) {
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monitorsState.monitors[monitor.id].checks[checkDay].res[
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checkLocation
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] = {
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n: 0,
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ms: 0,
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a: 0,
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}
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}
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const failedDay = getDate()
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if (!monitorsState[monitor.id].failedDays.includes(failedDay)) {
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console.log('Saving new failed daily status ...')
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monitorsState[monitor.id].failedDays.push(failedDay)
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// increment number of checks and sum of ms
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const no = ++monitorsState.monitors[monitor.id].checks[checkDay].res[
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checkLocation
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].n
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const ms = (monitorsState.monitors[monitor.id].checks[checkDay].res[
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checkLocation
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].ms += requestTime)
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// save new average ms
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monitorsState.monitors[monitor.id].checks[checkDay].res[
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checkLocation
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].a = Math.round(ms / no)
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} else if (!monitorOperational) {
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// Save allOperational to false
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monitorsState.lastUpdate.allOperational = false
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// Increment failed checks, only on status change (maybe call it .incidents instead?)
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if (monitorStatusChanged) {
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monitorsState.monitors[monitor.id].checks[checkDay].fails++
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}
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}
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}
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|
||||
// Get Worker PoP and save it to monitorsStateMetadata
|
||||
const res = await fetch('https://cloudflare-dns.com/dns-query', {
|
||||
method: 'OPTIONS',
|
||||
})
|
||||
const loc = res.headers.get('cf-ray').split('-')[1]
|
||||
monitorsStateMetadata.lastUpdate = {
|
||||
loc,
|
||||
time: Date.now(),
|
||||
}
|
||||
// Save last update information
|
||||
monitorsState.lastUpdate.time = Date.now()
|
||||
monitorsState.lastUpdate.loc = checkLocation
|
||||
|
||||
// Save monitorsState and monitorsStateMetadata to KV storage
|
||||
await setKV(
|
||||
'monitors_data',
|
||||
JSON.stringify(monitorsState),
|
||||
monitorsStateMetadata,
|
||||
)
|
||||
// Save monitorsState to KV storage
|
||||
await setKVMonitors(monitorsState)
|
||||
|
||||
return new Response('OK')
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,18 +1,20 @@
|
|||
import config from '../../config.yaml'
|
||||
import { useEffect, useState } from 'react'
|
||||
|
||||
export async function getMonitors() {
|
||||
return await getKVWithMetadata('monitors_data', 'json')
|
||||
export async function getKVMonitors() {
|
||||
// trying both to see performance difference
|
||||
return KV_STATUS_PAGE.get('monitors_data', 'json')
|
||||
//return JSON.parse(await KV_STATUS_PAGE.get('monitors_data', 'text'))
|
||||
}
|
||||
|
||||
export async function setKVMonitors(data) {
|
||||
return setKV('monitors_data', JSON.stringify(data))
|
||||
}
|
||||
|
||||
export async function setKV(key, value, metadata, expirationTtl) {
|
||||
return KV_STATUS_PAGE.put(key, value, { metadata, expirationTtl })
|
||||
}
|
||||
|
||||
export async function getKVWithMetadata(key, type = 'text') {
|
||||
return KV_STATUS_PAGE.getWithMetadata(key, type)
|
||||
}
|
||||
|
||||
export async function notifySlack(monitor, operational) {
|
||||
const payload = {
|
||||
attachments: [
|
||||
|
|
@ -23,10 +25,11 @@ export async function notifySlack(monitor, operational) {
|
|||
type: 'section',
|
||||
text: {
|
||||
type: 'mrkdwn',
|
||||
text: `Monitor *${monitor.name}* changed status to *${operational
|
||||
text: `Monitor *${monitor.name}* changed status to *${
|
||||
operational
|
||||
? config.settings.monitorLabelOperational
|
||||
: config.settings.monitorLabelNotOperational
|
||||
}*`,
|
||||
}*`,
|
||||
},
|
||||
},
|
||||
{
|
||||
|
|
@ -34,9 +37,11 @@ export async function notifySlack(monitor, operational) {
|
|||
elements: [
|
||||
{
|
||||
type: 'mrkdwn',
|
||||
text: `${operational ? ':white_check_mark:' : ':x:'} \`${monitor.method ? monitor.method : 'GET'
|
||||
} ${monitor.url}\` - :eyes: <${config.settings.url
|
||||
}|Status Page>`,
|
||||
text: `${operational ? ':white_check_mark:' : ':x:'} \`${
|
||||
monitor.method ? monitor.method : 'GET'
|
||||
} ${monitor.url}\` - :eyes: <${
|
||||
config.settings.url
|
||||
}|Status Page>`,
|
||||
},
|
||||
],
|
||||
},
|
||||
|
|
@ -78,3 +83,10 @@ export function useKeyPress(targetKey) {
|
|||
|
||||
return keyPressed
|
||||
}
|
||||
|
||||
export async function getCheckLocation() {
|
||||
const res = await fetch('https://cloudflare-dns.com/dns-query', {
|
||||
method: 'OPTIONS',
|
||||
})
|
||||
return res.headers.get('cf-ray').split('-')[1]
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue