Include cluster domain into Project Cluster API59441-add-base-domain-to-cluster-api

Domain was introduced on 11.8 and was not included on the
Project Cluster API. With this change user will be able to include
domain when adding and updating a cluster. Domain will also be included
on the GET calls.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/59441

5 files changed, 21 insertions, 3 deletions

diff --git a/changelogs/unreleased/59441-add-base-domain-to-cluster-api.yml b/changelogs/unreleased/59441-add-base-domain-to-cluster-api.yml
new file mode 100644
index 00000000000..cb5cbba4e92
--- /dev/null
+++ b/changelogs/unreleased/59441-add-base-domain-to-cluster-api.yml
@@ -0,0 +1,5 @@
+---
+title: Add cluster domain to Project Cluster API
+merge_request: 26735
+author:
+type: other
diff --git a/doc/api/project_clusters.md b/doc/api/project_clusters.md
index 8efb98fe1fc..02334f0298e 100644
--- a/doc/api/project_clusters.md
+++ b/doc/api/project_clusters.md
@@ -33,6 +33,7 @@ Example response:
   {
     "id":18,
     "name":"cluster-1",
+    "domain":"example.com",
     "created_at":"2019-01-02T20:18:12.563Z",
     "provider_type":"user",
     "platform_type":"kubernetes",
@@ -90,6 +91,7 @@ Example response:
 {
   "id":18,
   "name":"cluster-1",
+  "domain":"example.com",
   "created_at":"2019-01-02T20:18:12.563Z",
   "provider_type":"user",
   "platform_type":"kubernetes",
@@ -157,6 +159,7 @@ Parameters:
 | --------- | ---- | -------- | ----------- |
 | `id` | integer | yes | The ID of the project owned by the authenticated user |
 | `name` | String | yes | The name of the cluster |
+| `domain` | String | no | The [base domain](../user/project/clusters/index.md#base_domain) of the cluster |
 | `enabled` | Boolean | no | Determines if cluster is active or not, defaults to true |
 | `platform_kubernetes_attributes[api_url]` | String | yes | The URL to access the Kubernetes API |
 | `platform_kubernetes_attributes[token]` | String | yes | The token to authenticate against Kubernetes |
@@ -247,6 +250,7 @@ Parameters:
 | `id` | integer | yes | The ID of the project owned by the authenticated user |
 | `cluster_id` | integer | yes | The ID of the cluster |
 | `name` | String | no | The name of the cluster |
+| `domain` | String | no | The [base domain](../user/project/clusters/index.md#base_domain) of the cluster |
 | `platform_kubernetes_attributes[api_url]` | String | no | The URL to access the Kubernetes API |
 | `platform_kubernetes_attributes[token]` | String | no | The token to authenticate against Kubernetes |
 | `platform_kubernetes_attributes[ca_cert]` | String | no | TLS certificate (needed if API is using a self-signed TLS certificate |
@@ -262,7 +266,7 @@ Example request:
 ```bash
 curl --header 'Private-Token: <your_access_token>' https://gitlab.example.com/api/v4/projects/26/clusters/24 \
 -H "Content-Type:application/json" \
--X PUT --data '{"name":"new-cluster-name","api_url":"https://new-api-url.com"}'
+-X PUT --data '{"name":"new-cluster-name","domain":"new-domain.com","api_url":"https://new-api-url.com"}'
 ```
 
 Example response:
@@ -271,6 +275,7 @@ Example response:
 {
   "id":24,
   "name":"new-cluster-name",
+  "domain":"new-domain.com",
   "created_at":"2019-01-03T21:53:40.610Z",
   "provider_type":"user",
   "platform_type":"kubernetes",
diff --git a/lib/api/entities.rb b/lib/api/entities.rb
index 0871ea8d21e..4533305bfd3 100644
--- a/lib/api/entities.rb
+++ b/lib/api/entities.rb
@@ -1588,7 +1588,7 @@ module API
     end
 
     class Cluster < Grape::Entity
-      expose :id, :name, :created_at
+      expose :id, :name, :created_at, :domain
       expose :provider_type, :platform_type, :environment_scope, :cluster_type
       expose :user, using: Entities::UserBasic
       expose :platform_kubernetes, using: Entities::Platform::Kubernetes
diff --git a/lib/api/project_clusters.rb b/lib/api/project_clusters.rb
index c96261a7b57..b62ec887183 100644
--- a/lib/api/project_clusters.rb
+++ b/lib/api/project_clusters.rb
@@ -53,6 +53,7 @@ module API
       params do
         requires :name, type: String, desc: 'Cluster name'
         optional :enabled, type: Boolean, default: true, desc: 'Determines if cluster is active or not, defaults to true'
+        optional :domain, type: String, desc: 'Cluster base domain'
         requires :platform_kubernetes_attributes, type: Hash, desc: %q(Platform Kubernetes data) do
           requires :api_url, type: String, allow_blank: false, desc: 'URL to access the Kubernetes API'
           requires :token, type: String, desc: 'Token to authenticate against Kubernetes'
@@ -83,6 +84,7 @@ module API
       params do
         requires :cluster_id, type: Integer, desc: 'The cluster ID'
         optional :name, type: String, desc: 'Cluster name'
+        optional :domain, type: String, desc: 'Cluster base domain'
         optional :platform_kubernetes_attributes, type: Hash, desc: %q(Platform Kubernetes data) do
           optional :api_url, type: String, desc: 'URL to access the Kubernetes API'
           optional :token, type: String, desc: 'Token to authenticate against Kubernetes'
diff --git a/spec/requests/api/project_clusters_spec.rb b/spec/requests/api/project_clusters_spec.rb
index 4e42e233b4c..81442125a1c 100644
--- a/spec/requests/api/project_clusters_spec.rb
+++ b/spec/requests/api/project_clusters_spec.rb
@@ -60,7 +60,7 @@ describe API::ProjectClusters do
     end
 
     let(:cluster) do
-      create(:cluster, :project, :provided_by_gcp,
+      create(:cluster, :project, :provided_by_gcp, :with_domain,
              platform_kubernetes: platform_kubernetes,
              user: current_user,
              projects: [project])
@@ -88,6 +88,7 @@ describe API::ProjectClusters do
         expect(json_response['platform_type']).to eq('kubernetes')
         expect(json_response['environment_scope']).to eq('*')
         expect(json_response['cluster_type']).to eq('project_type')
+        expect(json_response['domain']).to eq('example.com')
       end
 
       it 'returns project information' do
@@ -187,6 +188,7 @@ describe API::ProjectClusters do
     let(:cluster_params) do
       {
         name: 'test-cluster',
+        domain: 'domain.example.com',
         platform_kubernetes_attributes: platform_kubernetes_attributes
       }
     end
@@ -217,6 +219,7 @@ describe API::ProjectClusters do
           expect(cluster_result).to be_kubernetes
           expect(cluster_result.project).to eq(project)
           expect(cluster_result.name).to eq('test-cluster')
+          expect(cluster_result.domain).to eq('domain.example.com')
           expect(platform_kubernetes.rbac?).to be_truthy
           expect(platform_kubernetes.api_url).to eq(api_url)
           expect(platform_kubernetes.namespace).to eq(namespace)
@@ -294,6 +297,7 @@ describe API::ProjectClusters do
 
     let(:update_params) do
       {
+        domain: 'new-domain.com',
         platform_kubernetes_attributes: platform_kubernetes_attributes
       }
     end
@@ -330,6 +334,7 @@ describe API::ProjectClusters do
         end
 
         it 'should update cluster attributes' do
+          expect(cluster.domain).to eq('new-domain.com')
           expect(cluster.platform_kubernetes.namespace).to eq('new-namespace')
         end
       end
@@ -342,6 +347,7 @@ describe API::ProjectClusters do
         end
 
         it 'should not update cluster attributes' do
+          expect(cluster.domain).not_to eq('new_domain.com')
           expect(cluster.platform_kubernetes.namespace).not_to eq('invalid_namespace')
           expect(cluster.kubernetes_namespace.namespace).not_to eq('invalid_namespace')
         end