Adds support service discovery page in react ui (#6394)

* active targets component completed

Signed-off-by: Harkishen-Singh <harkishensingh@hotmail.com>

* support for service-discovery in react ui

Signed-off-by: Harkishen-Singh <harkishensingh@hotmail.com>

* restored prev files

Signed-off-by: Harkishen-Singh <harkishensingh@hotmail.com>

* used fc

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

* removed trivial keys

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

* FC based labels

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

* implemented suggestions

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

* implemented suggestions

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

* implmented suggestions

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

* minor word change

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

* before dropped addressed

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

* implemented suggestions

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

* linted

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

* implemented suggestions

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

* implemented suggestions. removed false styles

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

* implemented suggestions. Unified buttons with targets screen.

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

* component for ToggleButton

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

* removed false Button

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

* implemented suggestions.

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

* tests for ToggleMoreLess component

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

* linted

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

* fixed nested h3. implemented suggestions

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

* linted

Signed-off-by: Harkishen Singh <harkishensingh@hotmail.com>

web/ui/react-app/src/App.css

@@ -208,6 +208,11 @@ button.execute-btn {
     margin-bottom: 20px;
 }
 
+.target-head {
+    font-weight: 700;
+    font-size: large;
+}
+
 .status-badges {
     display: flex;
     justify-content: space-between;

web/ui/react-app/src/pages/LabelsTable.tsx

@@ -0,0 +1,65 @@
+import React, { FC, useState } from 'react';
+import { RouteComponentProps } from '@reach/router';
+import { Badge, Table } from 'reactstrap';
+import { TargetLabels } from './Services';
+import { ToggleMoreLess } from './targets/ToggleMoreLess';
+
+interface LabelProps {
+  value: TargetLabels[];
+  name: string;
+}
+
+const formatLabels = (labels: Record<string, string> | string) => {
+  return Object.entries(labels).map(([key, value]) => {
+    return (
+      <div key={key}>
+        <Badge color="primary" className="mr-1">
+          {`${key}="${value}"`}
+        </Badge>
+      </div>
+    );
+  });
+};
+
+export const LabelsTable: FC<RouteComponentProps & LabelProps> = ({ value, name }) => {
+  const [showMore, setShowMore] = useState(false);
+
+  return (
+    <>
+      <div>
+        <ToggleMoreLess
+          event={(): void => {
+            setShowMore(!showMore);
+          }}
+          showMore={showMore}
+        >
+          <span className="target-head">{name}</span>
+        </ToggleMoreLess>
+      </div>
+      {showMore ? (
+        <Table size="sm" bordered hover striped>
+          <thead>
+            <tr>
+              <th>Discovered Labels</th>
+              <th>Target Labels</th>
+            </tr>
+          </thead>
+          <tbody>
+            {value.map((_, i) => {
+              return (
+                <tr key={i}>
+                  <td>{formatLabels(value[i].discoveredLabels)}</td>
+                  {value[i].isDropped ? (
+                    <td style={{ fontWeight: 'bold' }}>Dropped</td>
+                  ) : (
+                    <td>{formatLabels(value[i].labels)}</td>
+                  )}
+                </tr>
+              );
+            })}
+          </tbody>
+        </Table>
+      ) : null}
+    </>
+  );
+};

web/ui/react-app/src/pages/Services.tsx

@@ -1,15 +1,119 @@
 import React, { FC } from 'react';
 import { RouteComponentProps } from '@reach/router';
 import PathPrefixProps from '../PathPrefixProps';
+import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
+import { faSpinner } from '@fortawesome/free-solid-svg-icons';
 import { Alert } from 'reactstrap';
+import { useFetch } from '../utils/useFetch';
+import { LabelsTable } from './LabelsTable';
+import { Target, Labels, DroppedTarget } from './targets/target';
 
-const Services: FC<RouteComponentProps & PathPrefixProps> = ({ pathPrefix }) => (
+// TODO: Deduplicate with https://github.com/prometheus/prometheus/blob/213a8fe89a7308e73f22888a963cbf9375217cd6/web/ui/react-app/src/pages/targets/ScrapePoolList.tsx#L11-L14
-  <>
+interface ServiceMap {
-    <h2>Service Discovery</h2>
+  activeTargets: Target[];
-    <Alert color="warning">
+  droppedTargets: DroppedTarget[];
-      This page is still under construction. Please try it in the <a href={`${pathPrefix}/service-discovery`}>Classic UI</a>.
+}
-    </Alert>
+
-  </>
+export interface TargetLabels {
-);
+  discoveredLabels: Labels;
+  labels: Labels;
+  isDropped: boolean;
+}
+
+const Services: FC<RouteComponentProps & PathPrefixProps> = ({ pathPrefix }) => {
+  const { response, error } = useFetch<ServiceMap>(`${pathPrefix}/api/v1/targets`);
+
+  const processSummary = (response: ServiceMap) => {
+    const targets: any = {};
+
+    // Get targets of each type along with the total and active end points
+    for (const target of response.activeTargets) {
+      const { scrapePool: name } = target;
+      if (!targets[name]) {
+        targets[name] = {
+          total: 0,
+          active: 0,
+        };
+      }
+      targets[name].total++;
+      targets[name].active++;
+    }
+    for (const target of response.droppedTargets) {
+      const { job: name } = target.discoveredLabels;
+      if (!targets[name]) {
+        targets[name] = {
+          total: 0,
+          active: 0,
+        };
+      }
+      targets[name].total++;
+    }
+
+    return targets;
+  };
+
+  const processTargets = (response: Target[], dropped: DroppedTarget[]) => {
+    const labels: Record<string, TargetLabels[]> = {};
+
+    for (const target of response) {
+      const name = target.scrapePool;
+      if (!labels[name]) {
+        labels[name] = [];
+      }
+      labels[name].push({
+        discoveredLabels: target.discoveredLabels,
+        labels: target.labels,
+        isDropped: false,
+      });
+    }
+
+    for (const target of dropped) {
+      const { job: name } = target.discoveredLabels;
+      if (!labels[name]) {
+        labels[name] = [];
+      }
+      labels[name].push({
+        discoveredLabels: target.discoveredLabels,
+        isDropped: true,
+        labels: {},
+      });
+    }
+
+    return labels;
+  };
+
+  if (error) {
+    return (
+      <Alert color="danger">
+        <strong>Error:</strong> Error fetching Service-Discovery: {error.message}
+      </Alert>
+    );
+  } else if (response.data) {
+    const targets = processSummary(response.data);
+    const labels = processTargets(response.data.activeTargets, response.data.droppedTargets);
+
+    return (
+      <>
+        <h2>Service Discovery</h2>
+        <ul>
+          {Object.keys(targets).map((val, i) => (
+            <li key={i}>
+              <a href={'#' + val}>
+                {' '}
+                {val} ({targets[val].active} / {targets[val].total} active targets){' '}
+              </a>
+            </li>
+          ))}
+        </ul>
+        <hr />
+        {Object.keys(labels).map((val: any, i) => {
+          const value = labels[val];
+          return <LabelsTable value={value} name={val} key={Object.keys(labels)[i]} />;
+        })}
+      </>
+    );
+  }
+  return <FontAwesomeIcon icon={faSpinner} spin />;
+};
 
 export default Services;

web/ui/react-app/src/pages/targets/ScrapePoolPanel.test.tsx

@@ -20,10 +20,6 @@ describe('ScrapePoolPanel', () => {
   });
 
   describe('Header', () => {
-    it('renders an h3', () => {
-      expect(scrapePoolPanel.find('h3')).toHaveLength(1);
-    });
-
     it('renders an anchor with up count and danger color if upCount < targetsCount', () => {
       const anchor = scrapePoolPanel.find('a');
       expect(anchor).toHaveLength(1);
@@ -47,14 +43,6 @@ describe('ScrapePoolPanel', () => {
       expect(anchor.prop('className')).toEqual('normal');
     });
 
-    it('renders a show less btn if expanded', () => {
-      const btn = scrapePoolPanel.find(Button);
-      expect(btn).toHaveLength(1);
-      expect(btn.prop('color')).toEqual('primary');
-      expect(btn.prop('size')).toEqual('xs');
-      expect(btn.render().text()).toEqual('show less');
-    });
-
     it('renders a show more btn if collapsed', () => {
       const props = {
         scrapePool: 'prometheus',
@@ -67,7 +55,6 @@ describe('ScrapePoolPanel', () => {
 
       const btn = scrapePoolPanel.find(Button);
       btn.simulate('click');
-      expect(btn.render().text()).toEqual('show more');
       const collapse = scrapePoolPanel.find(Collapse);
       expect(collapse.prop('isOpen')).toBe(false);
     });

web/ui/react-app/src/pages/targets/ScrapePoolPanel.tsx

@@ -1,6 +1,6 @@
 import React, { FC } from 'react';
 import { ScrapePool, getColor } from './target';
-import { Button, Collapse, Table, Badge } from 'reactstrap';
+import { Collapse, Table, Badge } from 'reactstrap';
 import styles from './ScrapePoolPanel.module.css';
 import { Target } from './target';
 import EndpointLink from './EndpointLink';
@@ -8,6 +8,7 @@ import TargetLabels from './TargetLabels';
 import { formatRelative, humanizeDuration } from '../../utils/timeFormat';
 import { now } from 'moment';
 import { useLocalStorage } from '../../hooks/useLocalStorage';
+import { ToggleMoreLess } from './ToggleMoreLess';
 
 interface PanelProps {
   scrapePool: string;
@@ -24,27 +25,14 @@ const ScrapePoolPanel: FC<PanelProps> = ({ scrapePool, targetGroup }) => {
     href: `#${id}`,
     id,
   };
-  const btnProps = {
-    children: `show ${expanded ? 'less' : 'more'}`,
-    color: 'primary',
-    onClick: (): void => setOptions({ expanded: !expanded }),
-    size: 'xs',
-    style: {
-      padding: '0.3em 0.3em 0.25em 0.3em',
-      fontSize: '0.375em',
-      marginLeft: '1em',
-      verticalAlign: 'baseline',
-    },
-  };
 
   return (
     <div className={styles.container}>
-      <h3>
+      <ToggleMoreLess event={(): void => setOptions({ expanded: !expanded })} showMore={expanded}>
         <a className={styles[modifier]} {...anchorProps}>
           {`${scrapePool} (${targetGroup.upCount}/${targetGroup.targets.length} up)`}
         </a>
-        <Button {...btnProps} />
+      </ToggleMoreLess>
-      </h3>
       <Collapse isOpen={expanded}>
         <Table className={styles.table} size="sm" bordered hover striped>
           <thead>

web/ui/react-app/src/pages/targets/ToggleMoreLess.test.tsx

@@ -0,0 +1,33 @@
+import React from 'react';
+import { shallow } from 'enzyme';
+import { Button } from 'reactstrap';
+import { ToggleMoreLess } from './ToggleMoreLess';
+
+describe('ToggleMoreLess', () => {
+  const showMoreValue = false;
+  const defaultProps = {
+    event: (): void => {
+      tggleBtn.setProps({ showMore: !showMoreValue });
+    },
+    showMore: showMoreValue,
+  };
+  const tggleBtn = shallow(<ToggleMoreLess {...defaultProps} />);
+
+  it('renders a show more btn at start', () => {
+    const btn = tggleBtn.find(Button);
+    expect(btn).toHaveLength(1);
+    expect(btn.prop('color')).toEqual('primary');
+    expect(btn.prop('size')).toEqual('xs');
+    expect(btn.render().text()).toEqual('show more');
+  });
+
+  it('renders a show less btn if clicked', () => {
+    tggleBtn.find(Button).simulate('click');
+    expect(
+      tggleBtn
+        .find(Button)
+        .render()
+        .text()
+    ).toEqual('show less');
+  });
+});

web/ui/react-app/src/pages/targets/ToggleMoreLess.tsx

@@ -0,0 +1,28 @@
+import React, { FC } from 'react';
+import { Button } from 'reactstrap';
+
+interface ToggleMoreLessProps {
+  event(): void;
+  showMore: boolean;
+}
+
+export const ToggleMoreLess: FC<ToggleMoreLessProps> = ({ children, event, showMore }) => {
+  return (
+    <h3>
+      {children}
+      <Button
+        size="xs"
+        onClick={event}
+        style={{
+          padding: '0.3em 0.3em 0.25em 0.3em',
+          fontSize: '0.375em',
+          marginLeft: '1em',
+          verticalAlign: 'baseline',
+        }}
+        color="primary"
+      >
+        show {showMore ? 'less' : 'more'}
+      </Button>
+    </h3>
+  );
+};

web/ui/react-app/src/pages/targets/target.ts

@@ -13,6 +13,10 @@ export interface Target {
   health: string;
 }
 
+export interface DroppedTarget {
+  discoveredLabels: Labels;
+}
+
 export interface ScrapePool {
   upCount: number;
   targets: Target[];