From 3dfe43c5b7d8de39337c7453e16492c39919bf80 Mon Sep 17 00:00:00 2001
From: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>
Date: Wed, 7 Jul 2021 16:00:18 -0400
Subject: [PATCH] [Fleet] Link to download page of current stack version on
 Agent install instructions (#104494) (#104731)

* [Fleet] Link to download page of current stack version

* Get Kibana version from semver function

* Fix jest

Co-authored-by: Zacqary Adam Xeper <Zacqary@users.noreply.github.com>
---
 .../agent_enrollment_flyout.test.mocks.ts     |  1 +
 .../agent_enrollment_flyout/steps.tsx         | 20 +++++++++++++++++--
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/x-pack/plugins/fleet/public/components/agent_enrollment_flyout/agent_enrollment_flyout.test.mocks.ts b/x-pack/plugins/fleet/public/components/agent_enrollment_flyout/agent_enrollment_flyout.test.mocks.ts
index d16be0d8b97e2c..d2e7c4089e88bd 100644
--- a/x-pack/plugins/fleet/public/components/agent_enrollment_flyout/agent_enrollment_flyout.test.mocks.ts
+++ b/x-pack/plugins/fleet/public/components/agent_enrollment_flyout/agent_enrollment_flyout.test.mocks.ts
@@ -50,6 +50,7 @@ jest.mock('./steps', () => {
     AgentPolicySelectionStep: jest.fn(),
     AgentEnrollmentKeySelectionStep: jest.fn(),
     ViewDataStep: jest.fn(),
+    DownloadStep: jest.fn(),
   };
 });
 
diff --git a/x-pack/plugins/fleet/public/components/agent_enrollment_flyout/steps.tsx b/x-pack/plugins/fleet/public/components/agent_enrollment_flyout/steps.tsx
index 8eeb5fac4b0df2..329e0c144687af 100644
--- a/x-pack/plugins/fleet/public/components/agent_enrollment_flyout/steps.tsx
+++ b/x-pack/plugins/fleet/public/components/agent_enrollment_flyout/steps.tsx
@@ -9,15 +9,24 @@ import React, { useCallback, useMemo } from 'react';
 import { EuiText, EuiButton, EuiSpacer } from '@elastic/eui';
 import { FormattedMessage } from '@kbn/i18n/react';
 import { i18n } from '@kbn/i18n';
+import semver from 'semver';
 
 import type { AgentPolicy, PackagePolicy } from '../../types';
-import { sendGetOneAgentPolicy } from '../../hooks';
+import { sendGetOneAgentPolicy, useKibanaVersion } from '../../hooks';
 import { FLEET_SERVER_PACKAGE } from '../../constants';
 
 import { EnrollmentStepAgentPolicy } from './agent_policy_selection';
 import { AdvancedAgentAuthenticationSettings } from './advanced_agent_authentication_settings';
 
 export const DownloadStep = () => {
+  const kibanaVersion = useKibanaVersion();
+  const kibanaVersionURLString = useMemo(
+    () =>
+      `${semver.major(kibanaVersion)}-${semver.minor(kibanaVersion)}-${semver.patch(
+        kibanaVersion
+      )}`,
+    [kibanaVersion]
+  );
   return {
     title: i18n.translate('xpack.fleet.agentEnrollment.stepDownloadAgentTitle', {
       defaultMessage: 'Download the Elastic Agent to your host',
@@ -30,9 +39,16 @@ export const DownloadStep = () => {
             defaultMessage="Fleet Server runs on an Elastic Agent. You can download the Elastic Agent binaries and verification signatures from Elastic’s download page."
           />
         </EuiText>
+        <EuiSpacer size="s" />
+        <EuiText size="s">
+          <FormattedMessage
+            id="xpack.fleet.agentEnrollment.downloadUseLinuxInstaller"
+            defaultMessage="Linux users: We recommend using the installers over (RPM/DEB) because they provide the ability to upgrade your agent within Fleet."
+          />
+        </EuiText>
         <EuiSpacer size="l" />
         <EuiButton
-          href="https://ela.st/download-elastic-agent"
+          href={`https://www.elastic.co/downloads/past-releases/elastic-agent-${kibanaVersionURLString}`}
           target="_blank"
           iconSide="right"
           iconType="popout"