Uninstall application confirm modal component

- Vue confirmation modal implementation
- CSS tweaks for modal default height

19 files changed, 591 insertions, 143 deletions

diff --git a/app/assets/javascripts/clusters/clusters_bundle.js b/app/assets/javascripts/clusters/clusters_bundle.js
index 8461e01de7b..561b6bdd9f1 100644
--- a/app/assets/javascripts/clusters/clusters_bundle.js
+++ b/app/assets/javascripts/clusters/clusters_bundle.js
@@ -132,6 +132,7 @@ export default class Clusters {
     eventHub.$on('dismissUpgradeSuccess', appId => this.dismissUpgradeSuccess(appId));
     eventHub.$on('saveKnativeDomain', data => this.saveKnativeDomain(data));
     eventHub.$on('setKnativeHostname', data => this.setKnativeHostname(data));
+    eventHub.$on('uninstallApplication', data => this.uninstallApplication(data));
   }
 
   removeListeners() {
@@ -141,6 +142,7 @@ export default class Clusters {
     eventHub.$off('dismissUpgradeSuccess', this.dismissUpgradeSuccess);
     eventHub.$off('saveKnativeDomain');
     eventHub.$off('setKnativeHostname');
+    eventHub.$off('uninstallApplication');
   }
 
   initPolling() {
@@ -249,14 +251,13 @@ export default class Clusters {
     }
   }
 
-  installApplication(data) {
-    const appId = data.id;
+  installApplication({ id: appId, params }) {
     this.store.updateAppProperty(appId, 'requestReason', null);
     this.store.updateAppProperty(appId, 'statusReason', null);
 
     this.store.installApplication(appId);
 
-    return this.service.installApplication(appId, data.params).catch(() => {
+    return this.service.installApplication(appId, params).catch(() => {
       this.store.notifyInstallFailure(appId);
       this.store.updateAppProperty(
         appId,
@@ -266,6 +267,22 @@ export default class Clusters {
     });
   }
 
+  uninstallApplication({ id: appId }) {
+    this.store.updateAppProperty(appId, 'requestReason', null);
+    this.store.updateAppProperty(appId, 'statusReason', null);
+
+    this.store.uninstallApplication(appId);
+
+    return this.service.uninstallApplication(appId).catch(() => {
+      this.store.notifyUninstallFailure(appId);
+      this.store.updateAppProperty(
+        appId,
+        'requestReason',
+        s__('ClusterIntegration|Request to begin uninstalling failed'),
+      );
+    });
+  }
+
   upgradeApplication(data) {
     const appId = data.id;
 
diff --git a/app/assets/javascripts/clusters/components/application_row.vue b/app/assets/javascripts/clusters/components/application_row.vue
index a351916942e..5f7675bb432 100644
--- a/app/assets/javascripts/clusters/components/application_row.vue
+++ b/app/assets/javascripts/clusters/components/application_row.vue
@@ -1,12 +1,13 @@
 <script>
 /* eslint-disable vue/require-default-prop */
-import { GlLink } from '@gitlab/ui';
+import { GlLink, GlModalDirective } from '@gitlab/ui';
 import TimeagoTooltip from '../../vue_shared/components/time_ago_tooltip.vue';
 import { s__, sprintf } from '../../locale';
 import eventHub from '../event_hub';
 import identicon from '../../vue_shared/components/identicon.vue';
 import loadingButton from '../../vue_shared/components/loading_button.vue';
 import UninstallApplicationButton from './uninstall_application_button.vue';
+import UninstallApplicationConfirmationModal from './uninstall_application_confirmation_modal.vue';
 
 import { APPLICATION_STATUS } from '../constants';
 
@@ -17,6 +18,10 @@ export default {
     TimeagoTooltip,
     GlLink,
     UninstallApplicationButton,
+    UninstallApplicationConfirmationModal,
+  },
+  directives: {
+    GlModalDirective,
   },
   props: {
     id: {
@@ -94,6 +99,16 @@ export default {
       required: false,
       default: false,
     },
+    uninstallFailed: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+    uninstallSuccessful: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
     updateAcknowledged: {
       type: Boolean,
       required: false,
@@ -170,10 +185,21 @@ export default {
     manageButtonLabel() {
       return s__('ClusterIntegration|Manage');
     },
+    hasError() {
+      return this.installFailed || this.uninstallFailed;
+    },
     generalErrorDescription() {
-      return sprintf(s__('ClusterIntegration|Something went wrong while installing %{title}'), {
-        title: this.title,
-      });
+      let errorDescription;
+
+      if (this.installFailed) {
+        errorDescription = s__('ClusterIntegration|Something went wrong while installing %{title}');
+      } else if (this.uninstallFailed) {
+        errorDescription = s__(
+          'ClusterIntegration|Something went wrong while uninstalling %{title}',
+        );
+      }
+
+      return sprintf(errorDescription, { title: this.title });
     },
     versionLabel() {
       if (this.updateFailed) {
@@ -214,13 +240,23 @@ export default {
       //     AND new upgrade is unavailable AND version information is present.
       return (this.updateSuccessful || this.updateFailed) && !this.upgradeAvailable && this.version;
     },
+    uninstallSuccessDescription() {
+      return sprintf(s__('ClusterIntegration|%{title} uninstalled successfully.'), {
+        title: this.title,
+      });
+    },
   },
   watch: {
-    updateSuccessful() {
-      if (this.updateSuccessful) {
+    updateSuccessful(updateSuccessful) {
+      if (updateSuccessful) {
         this.$toast.show(this.upgradeSuccessDescription);
       }
     },
+    uninstallSuccessful(uninstallSuccessful) {
+      if (uninstallSuccessful) {
+        this.$toast.show(this.uninstallSuccessDescription);
+      }
+    },
   },
   methods: {
     installClicked() {
@@ -235,6 +271,11 @@ export default {
         params: this.installApplicationRequestParams,
       });
     },
+    uninstallConfirmed() {
+      eventHub.$emit('uninstallApplication', {
+        id: this.id,
+      });
+    },
   },
 };
 </script>
@@ -271,10 +312,7 @@ export default {
           <span v-else class="js-cluster-application-title">{{ title }}</span>
         </strong>
         <slot name="description"></slot>
-        <div
-          v-if="installFailed || isUnknownStatus"
-          class="cluster-application-error text-danger prepend-top-10"
-        >
+        <div v-if="hasError" class="cluster-application-error text-danger prepend-top-10">
           <p class="js-cluster-application-general-error-message append-bottom-0">
             {{ generalErrorDescription }}
           </p>
@@ -325,9 +363,9 @@ export default {
         role="gridcell"
       >
         <div v-if="showManageButton" class="btn-group table-action-buttons">
-          <a :href="manageLink" :class="{ disabled: disabled }" class="btn">
-            {{ manageButtonLabel }}
-          </a>
+          <a :href="manageLink" :class="{ disabled: disabled }" class="btn">{{
+            manageButtonLabel
+          }}</a>
         </div>
         <div class="btn-group table-action-buttons">
           <loading-button
@@ -340,8 +378,15 @@ export default {
           />
           <uninstall-application-button
             v-if="displayUninstallButton"
+            v-gl-modal-directive="'uninstall-' + id"
+            :status="status"
             class="js-cluster-application-uninstall-button"
           />
+          <uninstall-application-confirmation-modal
+            :application="id"
+            :application-title="title"
+            @confirm="uninstallConfirmed()"
+          />
         </div>
       </div>
     </div>
diff --git a/app/assets/javascripts/clusters/components/applications.vue b/app/assets/javascripts/clusters/components/applications.vue
index dfc2069f131..287bdbcf873 100644
--- a/app/assets/javascripts/clusters/components/applications.vue
+++ b/app/assets/javascripts/clusters/components/applications.vue
@@ -240,6 +240,9 @@ export default {
         :request-reason="applications.helm.requestReason"
         :installed="applications.helm.installed"
         :install-failed="applications.helm.installFailed"
+        :uninstallable="applications.helm.uninstallable"
+        :uninstall-successful="applications.helm.uninstallSuccessful"
+        :uninstall-failed="applications.helm.uninstallFailed"
         class="rounded-top"
         title-link="https://docs.helm.sh/"
       >
@@ -269,6 +272,9 @@ export default {
         :request-reason="applications.ingress.requestReason"
         :installed="applications.ingress.installed"
         :install-failed="applications.ingress.installFailed"
+        :uninstallable="applications.ingress.uninstallable"
+        :uninstall-successful="applications.ingress.uninstallSuccessful"
+        :uninstall-failed="applications.ingress.uninstallFailed"
         :disabled="!helmInstalled"
         title-link="https://kubernetes.io/docs/concepts/services-networking/ingress/"
       >
@@ -312,9 +318,9 @@ export default {
                 generated endpoint in order to access
                 your application after it has been deployed.`)
                 }}
-                <a :href="ingressDnsHelpPath" target="_blank" rel="noopener noreferrer">
-                  {{ __('More information') }}
-                </a>
+                <a :href="ingressDnsHelpPath" target="_blank" rel="noopener noreferrer">{{
+                  __('More information')
+                }}</a>
               </p>
             </div>
 
@@ -324,9 +330,9 @@ export default {
               the process of being assigned. Please check your Kubernetes
               cluster or Quotas on Google Kubernetes Engine if it takes a long time.`)
               }}
-              <a :href="ingressDnsHelpPath" target="_blank" rel="noopener noreferrer">
-                {{ __('More information') }}
-              </a>
+              <a :href="ingressDnsHelpPath" target="_blank" rel="noopener noreferrer">{{
+                __('More information')
+              }}</a>
             </p>
           </template>
           <template v-if="!ingressInstalled">
@@ -345,6 +351,9 @@ export default {
         :installed="applications.cert_manager.installed"
         :install-failed="applications.cert_manager.installFailed"
         :install-application-request-params="{ email: applications.cert_manager.email }"
+        :uninstallable="applications.cert_manager.uninstallable"
+        :uninstall-successful="applications.cert_manager.uninstallSuccessful"
+        :uninstall-failed="applications.cert_manager.uninstallFailed"
         :disabled="!helmInstalled"
         title-link="https://cert-manager.readthedocs.io/en/latest/#"
       >
@@ -352,9 +361,9 @@ export default {
           <div slot="description">
             <p v-html="certManagerDescription"></p>
             <div class="form-group">
-              <label for="cert-manager-issuer-email">
-                {{ s__('ClusterIntegration|Issuer Email') }}
-              </label>
+              <label for="cert-manager-issuer-email">{{
+                s__('ClusterIntegration|Issuer Email')
+              }}</label>
               <div class="input-group">
                 <input
                   v-model="applications.cert_manager.email"
@@ -391,6 +400,9 @@ export default {
         :request-reason="applications.prometheus.requestReason"
         :installed="applications.prometheus.installed"
         :install-failed="applications.prometheus.installFailed"
+        :uninstallable="applications.prometheus.uninstallable"
+        :uninstall-successful="applications.prometheus.uninstallSuccessful"
+        :uninstall-failed="applications.prometheus.uninstallFailed"
         :disabled="!helmInstalled"
         title-link="https://prometheus.io/docs/introduction/overview/"
       >
@@ -411,6 +423,9 @@ export default {
         :install-failed="applications.runner.installFailed"
         :update-successful="applications.runner.updateSuccessful"
         :update-failed="applications.runner.updateFailed"
+        :uninstallable="applications.runner.uninstallable"
+        :uninstall-successful="applications.runner.uninstallSuccessful"
+        :uninstall-failed="applications.runner.uninstallFailed"
         :disabled="!helmInstalled"
         title-link="https://docs.gitlab.com/runner/"
       >
@@ -434,6 +449,9 @@ export default {
         :request-reason="applications.jupyter.requestReason"
         :installed="applications.jupyter.installed"
         :install-failed="applications.jupyter.installFailed"
+        :uninstallable="applications.jupyter.uninstallable"
+        :uninstall-successful="applications.jupyter.uninstallSuccessful"
+        :uninstall-failed="applications.jupyter.uninstallFailed"
         :install-application-request-params="{ hostname: applications.jupyter.hostname }"
         :disabled="!helmInstalled"
         title-link="https://jupyterhub.readthedocs.io/en/stable/"
@@ -474,9 +492,9 @@ export default {
                   s__(`ClusterIntegration|Replace this with your own hostname if you want.
                 If you do so, point hostname to Ingress IP Address from above.`)
                 }}
-                <a :href="ingressDnsHelpPath" target="_blank" rel="noopener noreferrer">
-                  {{ __('More information') }}
-                </a>
+                <a :href="ingressDnsHelpPath" target="_blank" rel="noopener noreferrer">{{
+                  __('More information')
+                }}</a>
               </p>
             </div>
           </template>
@@ -494,6 +512,9 @@ export default {
         :installed="applications.knative.installed"
         :install-failed="applications.knative.installFailed"
         :install-application-request-params="{ hostname: applications.knative.hostname }"
+        :uninstallable="applications.knative.uninstallable"
+        :uninstall-successful="applications.knative.uninstallSuccessful"
+        :uninstall-failed="applications.knative.uninstallFailed"
         :disabled="!helmInstalled"
         v-bind="applications.knative"
         title-link="https://github.com/knative/docs"
@@ -505,9 +526,9 @@ export default {
                 s__(`ClusterIntegration|You must have an RBAC-enabled cluster
               to install Knative.`)
               }}
-              <a :href="helpPath" target="_blank" rel="noopener noreferrer">
-                {{ __('More information') }}
-              </a>
+              <a :href="helpPath" target="_blank" rel="noopener noreferrer">{{
+                __('More information')
+              }}</a>
             </p>
             <br />
           </span>
@@ -572,9 +593,9 @@ export default {
                     `ClusterIntegration|To access your application after deployment, point a wildcard DNS to the Knative Endpoint.`,
                   )
                 }}
-                <a :href="ingressDnsHelpPath" target="_blank" rel="noopener noreferrer">
-                  {{ __('More information') }}
-                </a>
+                <a :href="ingressDnsHelpPath" target="_blank" rel="noopener noreferrer">{{
+                  __('More information')
+                }}</a>
               </p>
 
               <p
diff --git a/app/assets/javascripts/clusters/components/uninstall_application_button.vue b/app/assets/javascripts/clusters/components/uninstall_application_button.vue
index 30918d1d115..ef4bcbe14dd 100644
--- a/app/assets/javascripts/clusters/components/uninstall_application_button.vue
+++ b/app/assets/javascripts/clusters/components/uninstall_application_button.vue
@@ -1,14 +1,33 @@
 <script>
-// TODO: Implement loading button component
 import LoadingButton from '~/vue_shared/components/loading_button.vue';
+import { APPLICATION_STATUS } from '~/clusters/constants';
+
+const { UPDATING, UNINSTALLING } = APPLICATION_STATUS;
 
 export default {
   components: {
     LoadingButton,
   },
+  props: {
+    status: {
+      type: String,
+      required: true,
+    },
+  },
+  computed: {
+    disabled() {
+      return [UNINSTALLING, UPDATING].includes(this.status);
+    },
+    loading() {
+      return this.status === UNINSTALLING;
+    },
+    label() {
+      return this.loading ? this.__('Uninstalling') : this.__('Uninstall');
+    },
+  },
 };
 </script>
 
 <template>
-  <loading-button @click="$emit('click')" />
+  <loading-button :label="label" :disabled="disabled" :loading="loading" />
 </template>
diff --git a/app/assets/javascripts/clusters/components/uninstall_application_confirmation_modal.vue b/app/assets/javascripts/clusters/components/uninstall_application_confirmation_modal.vue
new file mode 100644
index 00000000000..80ba2f22198
--- /dev/null
+++ b/app/assets/javascripts/clusters/components/uninstall_application_confirmation_modal.vue
@@ -0,0 +1,66 @@
+<script>
+import { GlModal } from '@gitlab/ui';
+import { sprintf, s__ } from '~/locale';
+import { INGRESS, CERT_MANAGER, PROMETHEUS, RUNNER, KNATIVE, JUPYTER } from '../constants';
+
+const CUSTOM_APP_WARNING_TEXT = {
+  [INGRESS]: s__(
+    'ClusterIntegration|The associated load balancer and IP will be deleted and cannot be restored.',
+  ),
+  [CERT_MANAGER]: s__(
+    'ClusterIntegration|The associated certifcate will be deleted and cannot be restored.',
+  ),
+  [PROMETHEUS]: s__('ClusterIntegration|All data will be deleted and cannot be restored.'),
+  [RUNNER]: s__('ClusterIntegration|Any running pipelines will be canceled.'),
+  [KNATIVE]: s__('ClusterIntegration|The associated IP will be deleted and cannot be restored.'),
+  [JUPYTER]: '',
+};
+
+export default {
+  components: {
+    GlModal,
+  },
+  props: {
+    application: {
+      type: String,
+      required: true,
+    },
+    applicationTitle: {
+      type: String,
+      required: true,
+    },
+  },
+  computed: {
+    title() {
+      return sprintf(s__('ClusterIntegration|Uninstall %{appTitle}'), {
+        appTitle: this.applicationTitle,
+      });
+    },
+    warningText() {
+      return sprintf(
+        s__('ClusterIntegration|You are about to uninstall %{appTitle} from your cluster.'),
+        {
+          appTitle: this.applicationTitle,
+        },
+      );
+    },
+    customAppWarningText() {
+      return CUSTOM_APP_WARNING_TEXT[this.application];
+    },
+    modalId() {
+      return `uninstall-${this.application}`;
+    },
+  },
+};
+</script>
+<template>
+  <gl-modal
+    ok-variant="danger"
+    cancel-variant="light"
+    :ok-title="title"
+    :modal-id="modalId"
+    :title="title"
+    @ok="$emit('confirm')"
+    >{{ warningText }} {{ customAppWarningText }}</gl-modal
+  >
+</template>
diff --git a/app/assets/javascripts/clusters/constants.js b/app/assets/javascripts/clusters/constants.js
index 48dbce9676e..8fd752092c9 100644
--- a/app/assets/javascripts/clusters/constants.js
+++ b/app/assets/javascripts/clusters/constants.js
@@ -28,16 +28,23 @@ export const APPLICATION_STATUS = {
 export const APPLICATION_INSTALLED_STATUSES = [
   APPLICATION_STATUS.INSTALLED,
   APPLICATION_STATUS.UPDATING,
+  APPLICATION_STATUS.UNINSTALLING,
 ];
 
 // These are only used client-side
 
 export const UPDATE_EVENT = 'update';
 export const INSTALL_EVENT = 'install';
+export const UNINSTALL_EVENT = 'uninstall';
 
+export const HELM = 'helm';
 export const INGRESS = 'ingress';
 export const JUPYTER = 'jupyter';
 export const KNATIVE = 'knative';
 export const RUNNER = 'runner';
 export const CERT_MANAGER = 'cert_manager';
+export const PROMETHEUS = 'prometheus';
+
+export const APPLICATIONS = [HELM, INGRESS, JUPYTER, KNATIVE, RUNNER, CERT_MANAGER, PROMETHEUS];
+
 export const INGRESS_DOMAIN_SUFFIX = '.nip.io';
diff --git a/app/assets/javascripts/clusters/services/application_state_machine.js b/app/assets/javascripts/clusters/services/application_state_machine.js
index aafb2350ae4..14b80a116a7 100644
--- a/app/assets/javascripts/clusters/services/application_state_machine.js
+++ b/app/assets/javascripts/clusters/services/application_state_machine.js
@@ -1,4 +1,4 @@
-import { APPLICATION_STATUS, UPDATE_EVENT, INSTALL_EVENT } from '../constants';
+import { APPLICATION_STATUS, UPDATE_EVENT, INSTALL_EVENT, UNINSTALL_EVENT } from '../constants';
 
 const {
   NO_STATUS,
@@ -11,6 +11,8 @@ const {
   UPDATING,
   UPDATED,
   UPDATE_ERRORED,
+  UNINSTALLING,
+  UNINSTALL_ERRORED,
 } = APPLICATION_STATUS;
 
 const applicationStateMachine = {
@@ -52,6 +54,15 @@ const applicationStateMachine = {
           updateFailed: true,
         },
       },
+      [UNINSTALLING]: {
+        target: UNINSTALLING,
+      },
+      [UNINSTALL_ERRORED]: {
+        target: INSTALLED,
+        effects: {
+          uninstallFailed: true,
+        },
+      },
     },
   },
   [NOT_INSTALLABLE]: {
@@ -97,6 +108,13 @@ const applicationStateMachine = {
           updateSuccessful: false,
         },
       },
+      [UNINSTALL_EVENT]: {
+        target: UNINSTALLING,
+        effects: {
+          uninstallFailed: false,
+          uninstallSuccessful: false,
+        },
+      },
     },
   },
   [UPDATING]: {
@@ -116,6 +134,22 @@ const applicationStateMachine = {
       },
     },
   },
+  [UNINSTALLING]: {
+    on: {
+      [INSTALLABLE]: {
+        target: INSTALLABLE,
+        effects: {
+          uninstallSuccessful: true,
+        },
+      },
+      [UNINSTALL_ERRORED]: {
+        target: INSTALLED,
+        effects: {
+          uninstallFailed: true,
+        },
+      },
+    },
+  },
 };
 
 /**
diff --git a/app/assets/javascripts/clusters/services/clusters_service.js b/app/assets/javascripts/clusters/services/clusters_service.js
index dea33ac44c5..01f3732de7e 100644
--- a/app/assets/javascripts/clusters/services/clusters_service.js
+++ b/app/assets/javascripts/clusters/services/clusters_service.js
@@ -29,6 +29,10 @@ export default class ClusterService {
     return axios.patch(this.appUpdateEndpointMap[appId], params);
   }
 
+  uninstallApplication(appId, params) {
+    return axios.delete(this.appInstallEndpointMap[appId], params);
+  }
+
   static updateCluster(endpoint, data) {
     return axios.put(endpoint, data);
   }
diff --git a/app/assets/javascripts/clusters/stores/clusters_store.js b/app/assets/javascripts/clusters/stores/clusters_store.js
index c2e30960659..1b4d7e8372c 100644
--- a/app/assets/javascripts/clusters/stores/clusters_store.js
+++ b/app/assets/javascripts/clusters/stores/clusters_store.js
@@ -10,6 +10,7 @@ import {
   APPLICATION_STATUS,
   INSTALL_EVENT,
   UPDATE_EVENT,
+  UNINSTALL_EVENT,
 } from '../constants';
 import transitionApplicationState from '../services/application_state_machine';
 
@@ -21,6 +22,9 @@ const applicationInitialState = {
   requestReason: null,
   installed: false,
   installFailed: false,
+  uninstallable: false,
+  uninstallFailed: false,
+  uninstallSuccessful: false,
 };
 
 export default class ClusterStore {
@@ -116,6 +120,14 @@ export default class ClusterStore {
     this.handleApplicationEvent(appId, APPLICATION_STATUS.UPDATE_ERRORED);
   }
 
+  uninstallApplication(appId) {
+    this.handleApplicationEvent(appId, UNINSTALL_EVENT);
+  }
+
+  notifyUninstallFailure(appId) {
+    this.handleApplicationEvent(appId, APPLICATION_STATUS.UNINSTALL_ERRORED);
+  }
+
   handleApplicationEvent(appId, event) {
     const currentAppState = this.state.applications[appId];
 
@@ -141,6 +153,7 @@ export default class ClusterStore {
         status_reason: statusReason,
         version,
         update_available: upgradeAvailable,
+        can_uninstall: uninstallable,
       } = serverAppEntry;
       const currentApplicationState = this.state.applications[appId] || {};
       const nextApplicationState = transitionApplicationState(currentApplicationState, status);
@@ -150,8 +163,7 @@ export default class ClusterStore {
         ...nextApplicationState,
         statusReason,
         installed: isApplicationInstalled(nextApplicationState.status),
-        // Make sure uninstallable is always false until this feature is unflagged
-        uninstallable: false,
+        uninstallable,
       };
 
       if (appId === INGRESS) {
diff --git a/app/assets/stylesheets/framework/modal.scss b/app/assets/stylesheets/framework/modal.scss
index 53222a2bd4d..323a3dbecd5 100644
--- a/app/assets/stylesheets/framework/modal.scss
+++ b/app/assets/stylesheets/framework/modal.scss
@@ -34,10 +34,10 @@
 .modal-body {
   background-color: $modal-body-bg;
   line-height: $line-height-base;
-  min-height: $modal-body-height;
   position: relative;
   padding: #{3 * $grid-size} #{2 * $grid-size};
   text-align: left;
+  white-space: normal;
 
   .form-actions {
     margin: #{2 * $grid-size} #{-2 * $grid-size} #{-2 * $grid-size};
diff --git a/changelogs/unreleased/60777-uninstall-button.yml b/changelogs/unreleased/60777-uninstall-button.yml
new file mode 100644
index 00000000000..a2727b16ef1
--- /dev/null
+++ b/changelogs/unreleased/60777-uninstall-button.yml
@@ -0,0 +1,5 @@
+---
+title: Implement UI for uninstalling Cluster’s managed apps
+merge_request: 27559
+author:
+type: added
diff --git a/locale/gitlab.pot b/locale/gitlab.pot
index e6dda6a35c2..cae94fb2af4 100644
--- a/locale/gitlab.pot
+++ b/locale/gitlab.pot
@@ -1984,6 +1984,9 @@ msgstr ""
 msgid "ClusterIntegration|%{appList} was successfully installed on your Kubernetes cluster"
 msgstr ""
 
+msgid "ClusterIntegration|%{title} uninstalled successfully."
+msgstr ""
+
 msgid "ClusterIntegration|%{title} upgraded successfully."
 msgstr ""
 
@@ -2011,6 +2014,9 @@ msgstr ""
 msgid "ClusterIntegration|Advanced options on this Kubernetes cluster's integration"
 msgstr ""
 
+msgid "ClusterIntegration|All data will be deleted and cannot be restored."
+msgstr ""
+
 msgid "ClusterIntegration|Alternatively"
 msgstr ""
 
@@ -2026,6 +2032,9 @@ msgstr ""
 msgid "ClusterIntegration|An error occurred while trying to fetch zone machine types: %{error}"
 msgstr ""
 
+msgid "ClusterIntegration|Any running pipelines will be canceled."
+msgstr ""
+
 msgid "ClusterIntegration|Applications"
 msgstr ""
 
@@ -2317,6 +2326,9 @@ msgstr ""
 msgid "ClusterIntegration|Request to begin installing failed"
 msgstr ""
 
+msgid "ClusterIntegration|Request to begin uninstalling failed"
+msgstr ""
+
 msgid "ClusterIntegration|Retry update"
 msgstr ""
 
@@ -2371,6 +2383,9 @@ msgstr ""
 msgid "ClusterIntegration|Something went wrong while installing %{title}"
 msgstr ""
 
+msgid "ClusterIntegration|Something went wrong while uninstalling %{title}"
+msgstr ""
+
 msgid "ClusterIntegration|Specifying a domain will allow you to use Auto Review Apps and Auto Deploy stages for %{auto_devops_start}Auto DevOps%{auto_devops_end}. The domain should have a wildcard DNS configured matching the domain."
 msgstr ""
 
@@ -2380,6 +2395,15 @@ msgstr ""
 msgid "ClusterIntegration|The URL used to access the Kubernetes API."
 msgstr ""
 
+msgid "ClusterIntegration|The associated IP will be deleted and cannot be restored."
+msgstr ""
+
+msgid "ClusterIntegration|The associated certifcate will be deleted and cannot be restored."
+msgstr ""
+
+msgid "ClusterIntegration|The associated load balancer and IP will be deleted and cannot be restored."
+msgstr ""
+
 msgid "ClusterIntegration|The endpoint is in the process of being assigned. Please check your Kubernetes cluster or Quotas on Google Kubernetes Engine if it takes a long time."
 msgstr ""
 
@@ -2395,6 +2419,9 @@ msgstr ""
 msgid "ClusterIntegration|Toggle Kubernetes cluster"
 msgstr ""
 
+msgid "ClusterIntegration|Uninstall %{appTitle}"
+msgstr ""
+
 msgid "ClusterIntegration|Update failed. Please check the logs and try again."
 msgstr ""
 
@@ -2422,6 +2449,9 @@ msgstr ""
 msgid "ClusterIntegration|With a Kubernetes cluster associated to this project, you can use review apps, deploy your applications, run your pipelines, and much more in an easy way."
 msgstr ""
 
+msgid "ClusterIntegration|You are about to uninstall %{appTitle} from your cluster."
+msgstr ""
+
 msgid "ClusterIntegration|You must first install Helm Tiller before installing the applications below"
 msgstr ""
 
diff --git a/spec/frontend/clusters/clusters_bundle_spec.js b/spec/frontend/clusters/clusters_bundle_spec.js
index a61103397eb..73897107f67 100644
--- a/spec/frontend/clusters/clusters_bundle_spec.js
+++ b/spec/frontend/clusters/clusters_bundle_spec.js
@@ -1,12 +1,12 @@
 import Clusters from '~/clusters/clusters_bundle';
-import { APPLICATION_STATUS, INGRESS_DOMAIN_SUFFIX } from '~/clusters/constants';
+import { APPLICATION_STATUS, INGRESS_DOMAIN_SUFFIX, APPLICATIONS } from '~/clusters/constants';
 import MockAdapter from 'axios-mock-adapter';
 import axios from '~/lib/utils/axios_utils';
 import { loadHTMLFixture } from 'helpers/fixtures';
 import { setTestTimeout } from 'helpers/timeout';
 import $ from 'jquery';
 
-const { INSTALLING, INSTALLABLE, INSTALLED } = APPLICATION_STATUS;
+const { INSTALLING, INSTALLABLE, INSTALLED, UNINSTALLING } = APPLICATION_STATUS;
 
 describe('Clusters', () => {
   setTestTimeout(1000);
@@ -212,73 +212,61 @@ describe('Clusters', () => {
   });
 
   describe('installApplication', () => {
-    it('tries to install helm', () => {
+    it.each(APPLICATIONS)('tries to install %s', applicationId => {
       jest.spyOn(cluster.service, 'installApplication').mockResolvedValueOnce();
 
-      cluster.store.state.applications.helm.status = INSTALLABLE;
+      cluster.store.state.applications[applicationId].status = INSTALLABLE;
 
-      cluster.installApplication({ id: 'helm' });
+      cluster.installApplication({ id: applicationId });
 
-      expect(cluster.store.state.applications.helm.status).toEqual(INSTALLING);
-      expect(cluster.store.state.applications.helm.requestReason).toEqual(null);
-      expect(cluster.service.installApplication).toHaveBeenCalledWith('helm', undefined);
+      expect(cluster.store.state.applications[applicationId].status).toEqual(INSTALLING);
+      expect(cluster.store.state.applications[applicationId].requestReason).toEqual(null);
+      expect(cluster.service.installApplication).toHaveBeenCalledWith(applicationId, undefined);
     });
 
-    it('tries to install ingress', () => {
-      jest.spyOn(cluster.service, 'installApplication').mockResolvedValueOnce();
-
-      cluster.store.state.applications.ingress.status = INSTALLABLE;
-
-      cluster.installApplication({ id: 'ingress' });
-
-      expect(cluster.store.state.applications.ingress.status).toEqual(INSTALLING);
-      expect(cluster.store.state.applications.ingress.requestReason).toEqual(null);
-      expect(cluster.service.installApplication).toHaveBeenCalledWith('ingress', undefined);
-    });
+    it('sets error request status when the request fails', () => {
+      jest
+        .spyOn(cluster.service, 'installApplication')
+        .mockRejectedValueOnce(new Error('STUBBED ERROR'));
 
-    it('tries to install runner', () => {
-      jest.spyOn(cluster.service, 'installApplication').mockResolvedValueOnce();
+      cluster.store.state.applications.helm.status = INSTALLABLE;
 
-      cluster.store.state.applications.runner.status = INSTALLABLE;
+      const promise = cluster.installApplication({ id: 'helm' });
 
-      cluster.installApplication({ id: 'runner' });
+      return promise.then(() => {
+        expect(cluster.store.state.applications.helm.status).toEqual(INSTALLABLE);
+        expect(cluster.store.state.applications.helm.installFailed).toBe(true);
 
-      expect(cluster.store.state.applications.runner.status).toEqual(INSTALLING);
-      expect(cluster.store.state.applications.runner.requestReason).toEqual(null);
-      expect(cluster.service.installApplication).toHaveBeenCalledWith('runner', undefined);
+        expect(cluster.store.state.applications.helm.requestReason).toBeDefined();
+      });
     });
+  });
 
-    it('tries to install jupyter', () => {
-      jest.spyOn(cluster.service, 'installApplication').mockResolvedValueOnce();
+  describe('uninstallApplication', () => {
+    it.each(APPLICATIONS)('tries to uninstall %s', applicationId => {
+      jest.spyOn(cluster.service, 'uninstallApplication').mockResolvedValueOnce();
 
-      cluster.installApplication({
-        id: 'jupyter',
-        params: { hostname: cluster.store.state.applications.jupyter.hostname },
-      });
+      cluster.store.state.applications[applicationId].status = INSTALLED;
 
-      cluster.store.state.applications.jupyter.status = INSTALLABLE;
-      expect(cluster.store.state.applications.jupyter.requestReason).toEqual(null);
-      expect(cluster.service.installApplication).toHaveBeenCalledWith('jupyter', {
-        hostname: cluster.store.state.applications.jupyter.hostname,
-      });
+      cluster.uninstallApplication({ id: applicationId });
+
+      expect(cluster.store.state.applications[applicationId].status).toEqual(UNINSTALLING);
+      expect(cluster.store.state.applications[applicationId].requestReason).toEqual(null);
+      expect(cluster.service.uninstallApplication).toHaveBeenCalledWith(applicationId);
     });
 
-    it('sets error request status when the request fails', () => {
+    it('sets error request status when the uninstall request fails', () => {
       jest
-        .spyOn(cluster.service, 'installApplication')
+        .spyOn(cluster.service, 'uninstallApplication')
         .mockRejectedValueOnce(new Error('STUBBED ERROR'));
 
-      cluster.store.state.applications.helm.status = INSTALLABLE;
+      cluster.store.state.applications.helm.status = INSTALLED;
 
-      const promise = cluster.installApplication({ id: 'helm' });
-
-      expect(cluster.store.state.applications.helm.status).toEqual(INSTALLING);
-      expect(cluster.store.state.applications.helm.requestReason).toEqual(null);
-      expect(cluster.service.installApplication).toHaveBeenCalled();
+      const promise = cluster.uninstallApplication({ id: 'helm' });
 
       return promise.then(() => {
-        expect(cluster.store.state.applications.helm.status).toEqual(INSTALLABLE);
-        expect(cluster.store.state.applications.helm.installFailed).toBe(true);
+        expect(cluster.store.state.applications.helm.status).toEqual(INSTALLED);
+        expect(cluster.store.state.applications.helm.uninstallFailed).toBe(true);
 
         expect(cluster.store.state.applications.helm.requestReason).toBeDefined();
       });
diff --git a/spec/frontend/clusters/components/application_row_spec.js b/spec/frontend/clusters/components/application_row_spec.js
index 17273b7d5b1..7c781b72355 100644
--- a/spec/frontend/clusters/components/application_row_spec.js
+++ b/spec/frontend/clusters/components/application_row_spec.js
@@ -1,7 +1,10 @@
 import Vue from 'vue';
+import { shallowMount } from '@vue/test-utils';
 import eventHub from '~/clusters/event_hub';
 import { APPLICATION_STATUS } from '~/clusters/constants';
 import applicationRow from '~/clusters/components/application_row.vue';
+import UninstallApplicationConfirmationModal from '~/clusters/components/uninstall_application_confirmation_modal.vue';
+
 import mountComponent from 'helpers/vue_mount_component_helper';
 import { DEFAULT_APPLICATION_STATE } from '../services/mock_data';
 
@@ -194,11 +197,52 @@ describe('Application Row', () => {
         ...DEFAULT_APPLICATION_STATE,
         installed: true,
         uninstallable: true,
+        status: APPLICATION_STATUS.NOT_INSTALLABLE,
       });
       const uninstallButton = vm.$el.querySelector('.js-cluster-application-uninstall-button');
 
       expect(uninstallButton).toBeTruthy();
     });
+
+    it('displays a success toast message if application uninstall was successful', () => {
+      vm = mountComponent(ApplicationRow, {
+        ...DEFAULT_APPLICATION_STATE,
+        title: 'GitLab Runner',
+        uninstallSuccessful: false,
+      });
+
+      vm.$toast = { show: jest.fn() };
+      vm.uninstallSuccessful = true;
+
+      return vm.$nextTick(() => {
+        expect(vm.$toast.show).toHaveBeenCalledWith('GitLab Runner uninstalled successfully.');
+      });
+    });
+  });
+
+  describe('when confirmation modal triggers confirm event', () => {
+    let wrapper;
+
+    beforeEach(() => {
+      wrapper = shallowMount(ApplicationRow, {
+        propsData: {
+          ...DEFAULT_APPLICATION_STATE,
+        },
+      });
+    });
+
+    afterEach(() => {
+      wrapper.destroy();
+    });
+
+    it('triggers uninstallApplication event', () => {
+      jest.spyOn(eventHub, '$emit');
+      wrapper.find(UninstallApplicationConfirmationModal).vm.$emit('confirm');
+
+      expect(eventHub.$emit).toHaveBeenCalledWith('uninstallApplication', {
+        id: DEFAULT_APPLICATION_STATE.id,
+      });
+    });
   });
 
   describe('Upgrade button', () => {
@@ -304,7 +348,7 @@ describe('Application Row', () => {
       vm.$toast = { show: jest.fn() };
       vm.updateSuccessful = true;
 
-      vm.$nextTick(() => {
+      return vm.$nextTick(() => {
         expect(vm.$toast.show).toHaveBeenCalledWith('GitLab Runner upgraded successfully.');
       });
     });
@@ -360,60 +404,88 @@ describe('Application Row', () => {
   });
 
   describe('Error block', () => {
-    it('does not show error block when there is no error', () => {
-      vm = mountComponent(ApplicationRow, {
-        ...DEFAULT_APPLICATION_STATE,
-        status: null,
-      });
-      const generalErrorMessage = vm.$el.querySelector(
-        '.js-cluster-application-general-error-message',
-      );
+    describe('when nothing fails', () => {
+      it('does not show error block', () => {
+        vm = mountComponent(ApplicationRow, {
+          ...DEFAULT_APPLICATION_STATE,
+        });
+        const generalErrorMessage = vm.$el.querySelector(
+          '.js-cluster-application-general-error-message',
+        );
 
-      expect(generalErrorMessage).toBeNull();
+        expect(generalErrorMessage).toBeNull();
+      });
     });
 
-    it('shows status reason when install fails', () => {
+    describe('when install or uninstall fails', () => {
       const statusReason = 'We broke it 0.0';
-      vm = mountComponent(ApplicationRow, {
-        ...DEFAULT_APPLICATION_STATE,
-        status: APPLICATION_STATUS.ERROR,
-        statusReason,
-        installFailed: true,
+      const requestReason = 'We broke the request 0.0';
+
+      beforeEach(() => {
+        vm = mountComponent(ApplicationRow, {
+          ...DEFAULT_APPLICATION_STATE,
+          status: APPLICATION_STATUS.ERROR,
+          statusReason,
+          requestReason,
+          installFailed: true,
+        });
       });
-      const generalErrorMessage = vm.$el.querySelector(
-        '.js-cluster-application-general-error-message',
-      );
-      const statusErrorMessage = vm.$el.querySelector(
-        '.js-cluster-application-status-error-message',
-      );
 
-      expect(generalErrorMessage.textContent.trim()).toEqual(
-        `Something went wrong while installing ${DEFAULT_APPLICATION_STATE.title}`,
-      );
+      it('shows status reason if it is available', () => {
+        const statusErrorMessage = vm.$el.querySelector(
+          '.js-cluster-application-status-error-message',
+        );
+
+        expect(statusErrorMessage.textContent.trim()).toEqual(statusReason);
+      });
+
+      it('shows request reason if it is available', () => {
+        const requestErrorMessage = vm.$el.querySelector(
+          '.js-cluster-application-request-error-message',
+        );
+
+        expect(requestErrorMessage.textContent.trim()).toEqual(requestReason);
+      });
+    });
+
+    describe('when install fails', () => {
+      beforeEach(() => {
+        vm = mountComponent(ApplicationRow, {
+          ...DEFAULT_APPLICATION_STATE,
+          status: APPLICATION_STATUS.ERROR,
+          installFailed: true,
+        });
+      });
 
-      expect(statusErrorMessage.textContent.trim()).toEqual(statusReason);
+      it('shows a general message indicating the installation failed', () => {
+        const generalErrorMessage = vm.$el.querySelector(
+          '.js-cluster-application-general-error-message',
+        );
+
+        expect(generalErrorMessage.textContent.trim()).toEqual(
+          `Something went wrong while installing ${DEFAULT_APPLICATION_STATE.title}`,
+        );
+      });
     });
 
-    it('shows request reason when REQUEST_FAILURE', () => {
-      const requestReason = 'We broke thre request 0.0';
-      vm = mountComponent(ApplicationRow, {
-        ...DEFAULT_APPLICATION_STATE,
-        status: APPLICATION_STATUS.INSTALLABLE,
-        installFailed: true,
-        requestReason,
+    describe('when uninstall fails', () => {
+      beforeEach(() => {
+        vm = mountComponent(ApplicationRow, {
+          ...DEFAULT_APPLICATION_STATE,
+          status: APPLICATION_STATUS.ERROR,
+          uninstallFailed: true,
+        });
       });
-      const generalErrorMessage = vm.$el.querySelector(
-        '.js-cluster-application-general-error-message',
-      );
-      const requestErrorMessage = vm.$el.querySelector(
-        '.js-cluster-application-request-error-message',
-      );
 
-      expect(generalErrorMessage.textContent.trim()).toEqual(
-        `Something went wrong while installing ${DEFAULT_APPLICATION_STATE.title}`,
-      );
+      it('shows a general message indicating the uninstalling failed', () => {
+        const generalErrorMessage = vm.$el.querySelector(
+          '.js-cluster-application-general-error-message',
+        );
 
-      expect(requestErrorMessage.textContent.trim()).toEqual(requestReason);
+        expect(generalErrorMessage.textContent.trim()).toEqual(
+          `Something went wrong while uninstalling ${DEFAULT_APPLICATION_STATE.title}`,
+        );
+      });
     });
   });
 });
diff --git a/spec/frontend/clusters/components/uninstall_application_button_spec.js b/spec/frontend/clusters/components/uninstall_application_button_spec.js
new file mode 100644
index 00000000000..9f9397d4d41
--- /dev/null
+++ b/spec/frontend/clusters/components/uninstall_application_button_spec.js
@@ -0,0 +1,32 @@
+import { shallowMount } from '@vue/test-utils';
+import UninstallApplicationButton from '~/clusters/components/uninstall_application_button.vue';
+import LoadingButton from '~/vue_shared/components/loading_button.vue';
+import { APPLICATION_STATUS } from '~/clusters/constants';
+
+const { INSTALLED, UPDATING, UNINSTALLING } = APPLICATION_STATUS;
+
+describe('UninstallApplicationButton', () => {
+  let wrapper;
+
+  const createComponent = (props = {}) => {
+    wrapper = shallowMount(UninstallApplicationButton, {
+      propsData: { ...props },
+    });
+  };
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  describe.each`
+    status          | loading  | disabled | label
+    ${INSTALLED}    | ${false} | ${false} | ${'Uninstall'}
+    ${UPDATING}     | ${false} | ${true}  | ${'Uninstall'}
+    ${UNINSTALLING} | ${true}  | ${true}  | ${'Uninstalling'}
+  `('when app status is $status', ({ loading, disabled, status, label }) => {
+    it(`renders a loading=${loading}, disabled=${disabled} button with label="${label}"`, () => {
+      createComponent({ status });
+      expect(wrapper.find(LoadingButton).props()).toMatchObject({ loading, disabled, label });
+    });
+  });
+});
diff --git a/spec/frontend/clusters/components/uninstall_application_confirmation_modal_spec.js b/spec/frontend/clusters/components/uninstall_application_confirmation_modal_spec.js
new file mode 100644
index 00000000000..6a7126b45cd
--- /dev/null
+++ b/spec/frontend/clusters/components/uninstall_application_confirmation_modal_spec.js
@@ -0,0 +1,47 @@
+import { shallowMount } from '@vue/test-utils';
+import UninstallApplicationConfirmationModal from '~/clusters/components/uninstall_application_confirmation_modal.vue';
+import { GlModal } from '@gitlab/ui';
+import { INGRESS } from '~/clusters/constants';
+
+describe('UninstallApplicationConfirmationModal', () => {
+  let wrapper;
+  const appTitle = 'Ingress';
+
+  const createComponent = (props = {}) => {
+    wrapper = shallowMount(UninstallApplicationConfirmationModal, {
+      propsData: { ...props },
+    });
+  };
+
+  afterEach(() => {
+    wrapper.destroy();
+  });
+
+  beforeEach(() => {
+    createComponent({ application: INGRESS, applicationTitle: appTitle });
+  });
+
+  it(`renders a modal with a title "Uninstall ${appTitle}"`, () => {
+    expect(wrapper.find(GlModal).attributes('title')).toEqual(`Uninstall ${appTitle}`);
+  });
+
+  it(`renders a modal with an ok button labeled "Uninstall ${appTitle}"`, () => {
+    expect(wrapper.find(GlModal).attributes('ok-title')).toEqual(`Uninstall ${appTitle}`);
+  });
+
+  it('triggers confirm event when ok button is clicked', () => {
+    wrapper.find(GlModal).vm.$emit('ok');
+
+    expect(wrapper.emitted('confirm')).toBeTruthy();
+  });
+
+  it('displays a warning text indicating the app will be uninstalled', () => {
+    expect(wrapper.text()).toContain(`You are about to uninstall ${appTitle} from your cluster.`);
+  });
+
+  it('displays a custom warning text depending on the application', () => {
+    expect(wrapper.text()).toContain(
+      `The associated load balancer and IP will be deleted and cannot be restored.`,
+    );
+  });
+});
diff --git a/spec/frontend/clusters/services/application_state_machine_spec.js b/spec/frontend/clusters/services/application_state_machine_spec.js
index e74b7910572..e057e2ac955 100644
--- a/spec/frontend/clusters/services/application_state_machine_spec.js
+++ b/spec/frontend/clusters/services/application_state_machine_spec.js
@@ -1,5 +1,10 @@
 import transitionApplicationState from '~/clusters/services/application_state_machine';
-import { APPLICATION_STATUS, UPDATE_EVENT, INSTALL_EVENT } from '~/clusters/constants';
+import {
+  APPLICATION_STATUS,
+  UNINSTALL_EVENT,
+  UPDATE_EVENT,
+  INSTALL_EVENT,
+} from '~/clusters/constants';
 
 const {
   NO_STATUS,
@@ -12,6 +17,8 @@ const {
   UPDATING,
   UPDATED,
   UPDATE_ERRORED,
+  UNINSTALLING,
+  UNINSTALL_ERRORED,
 } = APPLICATION_STATUS;
 
 const NO_EFFECTS = 'no effects';
@@ -21,16 +28,18 @@ describe('applicationStateMachine', () => {
 
   describe(`current state is ${NO_STATUS}`, () => {
     it.each`
-      expectedState      | event              | effects
-      ${INSTALLING}      | ${SCHEDULED}       | ${NO_EFFECTS}
-      ${NOT_INSTALLABLE} | ${NOT_INSTALLABLE} | ${NO_EFFECTS}
-      ${INSTALLABLE}     | ${INSTALLABLE}     | ${NO_EFFECTS}
-      ${INSTALLING}      | ${INSTALLING}      | ${NO_EFFECTS}
-      ${INSTALLED}       | ${INSTALLED}       | ${NO_EFFECTS}
-      ${INSTALLABLE}     | ${ERROR}           | ${{ installFailed: true }}
-      ${UPDATING}        | ${UPDATING}        | ${NO_EFFECTS}
-      ${INSTALLED}       | ${UPDATED}         | ${NO_EFFECTS}
-      ${INSTALLED}       | ${UPDATE_ERRORED}  | ${{ updateFailed: true }}
+      expectedState      | event                | effects
+      ${INSTALLING}      | ${SCHEDULED}         | ${NO_EFFECTS}
+      ${NOT_INSTALLABLE} | ${NOT_INSTALLABLE}   | ${NO_EFFECTS}
+      ${INSTALLABLE}     | ${INSTALLABLE}       | ${NO_EFFECTS}
+      ${INSTALLING}      | ${INSTALLING}        | ${NO_EFFECTS}
+      ${INSTALLED}       | ${INSTALLED}         | ${NO_EFFECTS}
+      ${INSTALLABLE}     | ${ERROR}             | ${{ installFailed: true }}
+      ${UPDATING}        | ${UPDATING}          | ${NO_EFFECTS}
+      ${INSTALLED}       | ${UPDATED}           | ${NO_EFFECTS}
+      ${INSTALLED}       | ${UPDATE_ERRORED}    | ${{ updateFailed: true }}
+      ${UNINSTALLING}    | ${UNINSTALLING}      | ${NO_EFFECTS}
+      ${INSTALLED}       | ${UNINSTALL_ERRORED} | ${{ uninstallFailed: true }}
     `(`transitions to $expectedState on $event event and applies $effects`, data => {
       const { expectedState, event, effects } = data;
       const currentAppState = {
@@ -99,8 +108,9 @@ describe('applicationStateMachine', () => {
 
   describe(`current state is ${INSTALLED}`, () => {
     it.each`
-      expectedState | event           | effects
-      ${UPDATING}   | ${UPDATE_EVENT} | ${{ updateFailed: false, updateSuccessful: false }}
+      expectedState   | event              | effects
+      ${UPDATING}     | ${UPDATE_EVENT}    | ${{ updateFailed: false, updateSuccessful: false }}
+      ${UNINSTALLING} | ${UNINSTALL_EVENT} | ${{ uninstallFailed: false, uninstallSuccessful: false }}
     `(`transitions to $expectedState on $event event and applies $effects`, data => {
       const { expectedState, event, effects } = data;
       const currentAppState = {
@@ -131,4 +141,22 @@ describe('applicationStateMachine', () => {
       });
     });
   });
+
+  describe(`current state is ${UNINSTALLING}`, () => {
+    it.each`
+      expectedState  | event                | effects
+      ${INSTALLABLE} | ${INSTALLABLE}       | ${{ uninstallSuccessful: true }}
+      ${INSTALLED}   | ${UNINSTALL_ERRORED} | ${{ uninstallFailed: true }}
+    `(`transitions to $expectedState on $event event and applies $effects`, data => {
+      const { expectedState, event, effects } = data;
+      const currentAppState = {
+        status: UNINSTALLING,
+      };
+
+      expect(transitionApplicationState(currentAppState, event)).toEqual({
+        status: expectedState,
+        ...effects,
+      });
+    });
+  });
 });
diff --git a/spec/frontend/clusters/services/mock_data.js b/spec/frontend/clusters/services/mock_data.js
index 1e896af1c7d..41ad398e924 100644
--- a/spec/frontend/clusters/services/mock_data.js
+++ b/spec/frontend/clusters/services/mock_data.js
@@ -11,6 +11,7 @@ const CLUSTERS_MOCK_DATA = {
             name: 'helm',
             status: APPLICATION_STATUS.INSTALLABLE,
             status_reason: null,
+            can_uninstall: false,
           },
           {
             name: 'ingress',
@@ -18,32 +19,38 @@ const CLUSTERS_MOCK_DATA = {
             status_reason: 'Cannot connect',
             external_ip: null,
             external_hostname: null,
+            can_uninstall: false,
           },
           {
             name: 'runner',
             status: APPLICATION_STATUS.INSTALLING,
             status_reason: null,
+            can_uninstall: false,
           },
           {
             name: 'prometheus',
             status: APPLICATION_STATUS.ERROR,
             status_reason: 'Cannot connect',
+            can_uninstall: false,
           },
           {
             name: 'jupyter',
             status: APPLICATION_STATUS.INSTALLING,
             status_reason: 'Cannot connect',
+            can_uninstall: false,
           },
           {
             name: 'knative',
             status: APPLICATION_STATUS.INSTALLING,
             status_reason: 'Cannot connect',
+            can_uninstall: false,
           },
           {
             name: 'cert_manager',
             status: APPLICATION_STATUS.ERROR,
             status_reason: 'Cannot connect',
             email: 'test@example.com',
+            can_uninstall: false,
           },
         ],
       },
diff --git a/spec/frontend/clusters/stores/clusters_store_spec.js b/spec/frontend/clusters/stores/clusters_store_spec.js
index a20e0439555..aa926bb36d7 100644
--- a/spec/frontend/clusters/stores/clusters_store_spec.js
+++ b/spec/frontend/clusters/stores/clusters_store_spec.js
@@ -63,6 +63,8 @@ describe('Clusters Store', () => {
             installed: false,
             installFailed: false,
             uninstallable: false,
+            uninstallSuccessful: false,
+            uninstallFailed: false,
           },
           ingress: {
             title: 'Ingress',
@@ -74,6 +76,8 @@ describe('Clusters Store', () => {
             installed: false,
             installFailed: true,
             uninstallable: false,
+            uninstallSuccessful: false,
+            uninstallFailed: false,
           },
           runner: {
             title: 'GitLab Runner',
@@ -89,6 +93,8 @@ describe('Clusters Store', () => {
             updateFailed: false,
             updateSuccessful: false,
             uninstallable: false,
+            uninstallSuccessful: false,
+            uninstallFailed: false,
           },
           prometheus: {
             title: 'Prometheus',
@@ -98,6 +104,8 @@ describe('Clusters Store', () => {
             installed: false,
             installFailed: true,
             uninstallable: false,
+            uninstallSuccessful: false,
+            uninstallFailed: false,
           },
           jupyter: {
             title: 'JupyterHub',
@@ -108,6 +116,8 @@ describe('Clusters Store', () => {
             installed: false,
             installFailed: false,
             uninstallable: false,
+            uninstallSuccessful: false,
+            uninstallFailed: false,
           },
           knative: {
             title: 'Knative',
@@ -121,6 +131,8 @@ describe('Clusters Store', () => {
             installed: false,
             installFailed: false,
             uninstallable: false,
+            uninstallSuccessful: false,
+            uninstallFailed: false,
           },
           cert_manager: {
             title: 'Cert-Manager',
@@ -131,6 +143,8 @@ describe('Clusters Store', () => {
             email: mockResponseData.applications[6].email,
             installed: false,
             uninstallable: false,
+            uninstallSuccessful: false,
+            uninstallFailed: false,
           },
         },
       });