Upgrade auto-deploy-image for helm default values file

changelogs/unreleased/helm_values_default.yml

+---
+title: Upgrade auto-deploy-image for helm default values file
+merge_request: 20588
+author:
+type: changed

doc/topics/autodevops/index.md

@@ -651,6 +651,8 @@ procfile exec` to replicate the environment where your application will run.
 
 #### Workers
 
+> [Introduced](https://gitlab.com/gitlab-org/gitlab/issues/30628) in GitLab 12.6, `.gitlab/auto-deploy-values.yaml` will be used by default for Helm upgrades.
+
 Some web applications need to run extra deployments for "worker processes". For
 example, it is common in a Rails application to have a separate worker process
 to run background tasks like sending emails.
@@ -672,13 +674,18 @@ need to:
 - Set a CI variable `K8S_SECRET_REDIS_URL`, which the URL of this instance to
   ensure it's passed into your deployments.
 
-Once you have configured your worker to respond to health checks, you will
-need to configure a CI variable `HELM_UPGRADE_EXTRA_ARGS` with the value
-`--values helm-values.yaml`.
+Once you have configured your worker to respond to health checks, run a Sidekiq
+worker for your Rails application. For:
+
+- GitLab 12.6 and later, either:
+  - Add a file named `.gitlab/auto-deploy-values.yaml` to your repository. It will
+    be automatically used if found.
+  - Add a file with a different name or path to the repository, and override the value of the
+    `HELM_UPGRADE_VALUES_FILE` variable with the path and name.
+- GitLab 12.5 and earlier, run the worker with the `--values` parameter that specifies
+  a file in the repository.
 
-Then you can, for example, run a Sidekiq worker for your Rails application
-by adding a file named `helm-values.yaml` to your repository with the following
-content:
+In any case, the file must contain the following:
 
 ```yml
 workers:
@@ -983,6 +990,7 @@ applications.
 | `CANARY_PRODUCTION_REPLICAS`            | Number of canary replicas to deploy for [Canary Deployments](../../user/project/canary_deployments.md) in the production environment. Takes precedence over `CANARY_REPLICAS`. Defaults to 1. |
 | `CANARY_REPLICAS`                       | Number of canary replicas to deploy for [Canary Deployments](../../user/project/canary_deployments.md). Defaults to 1. |
 | `HELM_RELEASE_NAME`                     | From GitLab 12.1, allows the `helm` release name to be overridden. Can be used to assign unique release names when deploying multiple projects to a single namespace. |
+| `HELM_UPGRADE_VALUES_FILE`              | From GitLab 12.6, allows the `helm upgrade` values file to be overridden. Defaults to `.gitlab/auto-deploy-values.yaml`. |
 | `HELM_UPGRADE_EXTRA_ARGS`               | From GitLab 11.11, allows extra arguments in `helm` commands when deploying the application. Note that using quotes will not prevent word splitting. **Tip:** you can use this variable to [customize the Auto Deploy Helm chart](#custom-helm-chart) by applying custom override values with `--values my-values.yaml`. |
 | `INCREMENTAL_ROLLOUT_MODE`              | From GitLab 11.4, if present, can be used to enable an [incremental rollout](#incremental-rollout-to-production-premium) of your application for the production environment. Set to `manual` for manual deployment jobs or `timed` for automatic rollout deployments with a 5 minute delay each one. |
 | `K8S_SECRET_*`                          | From GitLab 11.7, any variable prefixed with [`K8S_SECRET_`](#application-secret-variables) will be made available by Auto DevOps as environment variables to the deployed application. |

lib/gitlab/ci/templates/Jobs/Deploy.gitlab-ci.yml

 .auto-deploy:
-  image: "registry.gitlab.com/gitlab-org/cluster-integration/auto-deploy-image:v0.7.0"
+  image: "registry.gitlab.com/gitlab-org/cluster-integration/auto-deploy-image:v0.8.0"
 
 review:
   extends: .auto-deploy