Added support for custom hosts/domains

changelogs/unreleased/auto-devops-custom-domains.yml

+---
+title: Added support for custom hosts/domains to Auto DevOps
+merge_request: 24248
+author: walkafwalka
+type: added

doc/topics/autodevops/index.md

@@ -683,6 +683,8 @@ also be customized, and you can easily use a [custom buildpack](#custom-buildpac
 | `PRODUCTION_REPLICAS`        | The number of replicas to deploy in the production environment. This takes precedence over `REPLICAS`; defaults to 1.                                                                                                         |
 | `CANARY_REPLICAS`            | The number of canary replicas to deploy for [Canary Deployments](https://docs.gitlab.com/ee/user/project/canary_deployments.html); defaults to 1                                                                              |
 | `CANARY_PRODUCTION_REPLICAS` | The number of canary replicas to deploy for [Canary Deployments](https://docs.gitlab.com/ee/user/project/canary_deployments.html) in the production environment. This takes precedence over `CANARY_REPLICAS`; defaults to 1  |
+| `ADDITIONAL_HOSTS`           | Fully qualified domain names specified as a comma-separated list that are added to the ingress hosts.                                                                                                                         |
+| `<ENVIRONMENT>_ADDITIONAL_HOSTS` | For a specific environment, the fully qualified domain names specified as a comma-separated list that are added to the ingress hosts. This takes precedence over `ADDITIONAL_HOSTS`.                                      |
 | `POSTGRES_ENABLED`           | Whether PostgreSQL is enabled; defaults to `"true"`. Set to `false` to disable the automatic deployment of PostgreSQL.                                                                                                        |
 | `POSTGRES_USER`              | The PostgreSQL user; defaults to `user`. Set it to use a custom username.                                                                                                                                                     |
 | `POSTGRES_PASSWORD`          | The PostgreSQL password; defaults to `testing-password`. Set it to use a custom password.                                                                                                                                     |

lib/gitlab/ci/templates/Auto-DevOps.gitlab-ci.yml

@@ -667,6 +667,14 @@ rollout 100%:
 
     create_application_secret "$track"
 
+    env_slug=$(echo ${CI_ENVIRONMENT_SLUG//-/_} | tr -s '[:lower:]' '[:upper:]')
+    eval env_ADDITIONAL_HOSTS=\$${env_slug}_ADDITIONAL_HOSTS
+    if [ -n "$env_ADDITIONAL_HOSTS" ]; then
+      additional_hosts="{$env_ADDITIONAL_HOSTS}"
+    elif [ -n "$ADDITIONAL_HOSTS" ]; then
+      additional_hosts="{$ADDITIONAL_HOSTS}"
+    fi
+
     if [[ -n "$DB_INITIALIZE" && -z "$(helm ls -q "^$name$")" ]]; then
       echo "Deploying first release with database initialization..."
       helm upgrade --install \
@@ -681,6 +689,7 @@ rollout 100%:
         --set application.database_url="$DATABASE_URL" \
         --set application.secretName="$APPLICATION_SECRET_NAME" \
         --set service.url="$CI_ENVIRONMENT_URL" \
+        --set service.additionalHosts="$additional_hosts" \
         --set replicaCount="$replicas" \
         --set postgresql.enabled="$postgres_enabled" \
         --set postgresql.nameOverride="postgres" \
@@ -714,6 +723,7 @@ rollout 100%:
         --set application.database_url="$DATABASE_URL" \
         --set application.secretName="$APPLICATION_SECRET_NAME" \
         --set service.url="$CI_ENVIRONMENT_URL" \
+        --set service.additionalHosts="$additional_hosts" \
         --set replicaCount="$replicas" \
         --set postgresql.enabled="$postgres_enabled" \
         --set postgresql.nameOverride="postgres" \