fix(xo-server,xo-web,xo-common): list missing patches error handling

CHANGELOG.unreleased.md

@@ -17,6 +17,7 @@
 > Users must be able to say: “I had this issue, happy to know it's fixed”
 
 - [SR] Fix `[object HTMLInputElement]` name after re-attaching a SR [#4546](https://github.com/vatesfr/xen-orchestra/issues/4546) (PR [#4550](https://github.com/vatesfr/xen-orchestra/pull/4550))
+- [Patches] Better error handling when fetching missing patches (PR [#4519](https://github.com/vatesfr/xen-orchestra/pull/4519))
 
 ### Released packages
 

packages/xo-common/src/api-errors.js

@@ -172,3 +172,11 @@ export const patchPrecheckFailed = create(20, ({ errorType, patch }) => ({
   },
   message: `patch precheck failed: ${errorType}`,
 }))
+
+export const missingPatchesFetchFailed = create(21, ({ host, reason }) => ({
+  data: {
+    objectId: host,
+    reason,
+  },
+  message: 'cannot fetch missing patches',
+}))

packages/xo-server/src/xapi/mixins/patching.js

@@ -2,6 +2,7 @@ import createLogger from '@xen-orchestra/log'
 import deferrable from 'golike-defer'
 import unzip from 'julien-f-unzip'
 import { filter, find, pickBy, some } from 'lodash'
+import { missingPatchesFetchFailed } from 'xo-common/api-errors'
 
 import ensureArray from '../../_ensureArray'
 import { debounce } from '../../decorators'
@@ -40,7 +41,7 @@ const XCP_NG_DEBOUNCE_TIME_MS = 60000
 // list all yum updates available for a XCP-ng host
 // (hostObject) → { uuid: patchObject }
 async function _listXcpUpdates(host) {
-  return JSON.parse(
+  const patches = JSON.parse(
     await this.call(
       'host.call_plugin',
       host.$ref,
@@ -49,6 +50,10 @@ async function _listXcpUpdates(host) {
       {}
     )
   )
+  if (patches.error !== undefined) {
+    throw missingPatchesFetchFailed({ host: host.$id, reason: patches.error })
+  }
+  return patches
 }
 
 const _listXcpUpdateDebounced = debounceWithKey(

packages/xo-web/src/common/intl/messages.js

@@ -913,8 +913,8 @@ const messages = {
   installAllPatchesOnHostContent:
     'Are you sure you want to install all patches on this host?',
   patchRelease: 'Release',
-  updatePluginNotInstalled:
+  cannotFetchMissingPatches:
-    'An error occurred while fetching the patches. Please make sure the updater plugin is installed by running `yum install xcp-ng-updater` on the host.',
+    'We are unable to fetch the missing patches at the moment…',
   showChangelog: 'Show changelog',
   changelog: 'Changelog',
   changelogPatch: 'Patch',

packages/xo-web/src/common/xo/index.js

@@ -761,15 +761,16 @@ export const disableHost = host =>
 
 export const getHostMissingPatches = async host => {
   const hostId = resolveId(host)
-  if (host.productBrand !== 'XCP-ng') {
+  try {
     const patches = await _call('pool.listMissingPatches', { host: hostId })
     // Hide paid patches to XS-free users
-    return host.license_params.sku_type !== 'free'
+    if (
-      ? patches
+      host.productBrand !== 'XCP-ng' &&
-      : filter(patches, { paid: false })
+      host.license_params.sku_type !== 'free'
-  }
+    ) {
-  try {
+      return filter(patches, { paid: false })
-    return await _call('pool.listMissingPatches', { host: hostId })
+    }
+    return patches
   } catch (_) {
     return null
   }

packages/xo-web/src/xo-app/home/pool-item.js

@@ -11,7 +11,7 @@ import { Col } from 'grid'
 import { Text } from 'editable'
 import { addTag, editPool, getHostMissingPatches, removeTag } from 'xo'
 import { connectStore, formatSizeShort } from 'utils'
-import { flatten, map, size, uniq } from 'lodash'
+import { compact, flatten, map, size, uniq } from 'lodash'
 import {
   createGetObjectsOfType,
   createGetHostMetrics,
@@ -32,7 +32,7 @@ import styles from './index.css'
     getPoolHosts,
     hosts => {
       return Promise.all(map(hosts, host => getHostMissingPatches(host))).then(
-        patches => uniq(map(flatten(patches), 'name'))
+        patches => uniq(map(flatten(compact(patches)), 'name'))
       )
     }
   )

packages/xo-web/src/xo-app/host/tab-patches.js

@@ -285,7 +285,7 @@ export default class TabPatches extends Component {
       )
     }
     if (this.props.missingPatches === null) {
-      return <em>{_('updatePluginNotInstalled')}</em>
+      return <em>{_('cannotFetchMissingPatches')}</em>
     }
     const Patches =
       this.props.host.productBrand === 'XCP-ng' ? XcpPatches : XenServerPatches

packages/xo-web/src/xo-app/pool/tab-patches.js

@@ -198,7 +198,13 @@ export default class TabPatches extends Component {
               />
             </Col>
           </Row>
-          {productBrand === 'XCP-ng' ? (
+          {missingPatches === null ? (
+            <Row>
+              <Col>
+                <em>{_('cannotFetchMissingPatches')}</em>
+              </Col>
+            </Row>
+          ) : productBrand === 'XCP-ng' ? (
             <Row>
               <Col>
                 <h3>{_('hostMissingPatches')}</h3>