For example, to build a Docker image based on based on the `ruby:alpine`
instead of the default `ruby:latest`:
1. Set `AUTO_DEVOPS_BUILD_IMAGE_EXTRA_ARGS` to `--build-arg=RUBY_VERSION=alpine`.
1. Add the following to a custom `Dockerfile`:
```dockerfile
ARG RUBY_VERSION=latest
FROM ruby:$RUBY_VERSION
# ... put your stuff here
```
NOTE: **Note:**
Passing in complex values (newlines and spaces, for example) will likely
cause escaping issues due to the way this argument is used in Auto DevOps.
Consider using Base64 encoding of such values to avoid this problem.
CAUTION: **Warning:**
Avoid passing secrets as Docker build arguments if possible, as they may be
persisted in your image. See
[this discussion](https://github.com/moby/moby/issues/13490) for details.
## Passing secrets to `docker build`
> [Introduced](https://gitlab.com/gitlab-org/gitlab/issues/25514) in GitLab 12.3, but available in versions 11.9 and above.
CI environment variables can be passed as [build
secrets](https://docs.docker.com/develop/develop-images/build_enhancements/#new-docker-build-secret-information) to the `docker build` command by listing them comma separated by name in the
`AUTO_DEVOPS_BUILD_IMAGE_FORWARDED_CI_VARIABLES` variable. For example, in order to forward the variables `CI_COMMIT_SHA` and `CI_ENVIRONMENT_NAME`, one would set `AUTO_DEVOPS_BUILD_IMAGE_FORWARDED_CI_VARIABLES` to `CI_COMMIT_SHA,CI_ENVIRONMENT_NAME`.
Unlike build arguments, these are not persisted by Docker in the final image
(though you can still persist them yourself, so **be careful**).
In projects:
- Without a `Dockerfile`, these are available automatically as environment
variables.
- With a `Dockerfile`, the following is required:
1. Activate the experimental `Dockerfile` syntax by adding the following
to the top of the file:
```dockerfile
# syntax = docker/dockerfile:experimental
```
1. To make secrets available in any `RUN $COMMAND` in the `Dockerfile`, mount
the secret file and source it prior to running `$COMMAND`:
```dockerfile
RUN --mount=type=secret,id=auto-devops-build-secrets . /run/secrets/auto-devops-build-secrets && $COMMAND
```
NOTE: **Note:**
When `AUTO_DEVOPS_BUILD_IMAGE_FORWARDED_CI_VARIABLES` is set, Auto DevOps
enables the experimental [Docker BuildKit](https://docs.docker.com/develop/develop-images/build_enhancements/)
feature to use the `--secret` flag.
## Custom Helm Chart
Auto DevOps uses [Helm](https://helm.sh/) to deploy your application to Kubernetes.
You can override the Helm chart used by bundling up a chart into your project
repo or by specifying a project variable:
- **Bundled chart** - If your project has a `./chart` directory with a `Chart.yaml`
file in it, Auto DevOps will detect the chart and use it instead of the [default
This can be a great way to control exactly how your application is deployed.
- **Project variable** - Create a [project variable](../../ci/variables/README.md#gitlab-cicd-environment-variables)
`AUTO_DEVOPS_CHART` with the URL of a custom chart to use or create two project variables `AUTO_DEVOPS_CHART_REPOSITORY` with the URL of a custom chart repository and `AUTO_DEVOPS_CHART` with the path to the chart.
## Customize values for Helm Chart
> [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.
You can override the default values in the `values.yaml` file in the [default Helm chart](https://gitlab.com/gitlab-org/charts/auto-deploy-app).
This can be achieved by either:
- Adding a file named `.gitlab/auto-deploy-values.yaml` to your repository. It will
be automatically used if found.
- Adding a file with a different name or path to the repository, and set the
`HELM_UPGRADE_VALUES_FILE` [environment variable](#environment-variables) with the path and name.
NOTE: **Note:**
For GitLab 12.5 and earlier, the `HELM_UPGRADE_EXTRA_ARGS` environment variable can be used to override the default chart values.
To do so, set `HELM_UPGRADE_EXTRA_ARGS` to `--values my-values.yaml`.
## Custom Helm chart per environment
You can specify the use of a custom Helm chart per environment by scoping the environment variable
to the desired environment. See [Limiting environment scopes of variables](../../ci/variables/README.md#limiting-environment-scopes-of-environment-variables).
## Customizing `.gitlab-ci.yml`
Auto DevOps is completely customizable because the [Auto DevOps template](https://gitlab.com/gitlab-org/gitlab/blob/master/lib/gitlab/ci/templates/Auto-DevOps.gitlab-ci.yml):
- Is just an implementation of a [`.gitlab-ci.yml`](../../ci/yaml/README.md) file.
- Uses only features available to any implementation of `.gitlab-ci.yml`.
If you want to modify the CI/CD pipeline used by Auto DevOps, you can [`include`
the template](../../ci/yaml/README.md#includetemplate) and customize as
needed. To do this, add a `.gitlab-ci.yml` file to the root of your repository
containing the following:
```yml
include:
- template: Auto-DevOps.gitlab-ci.yml
```
Then add any extra changes you want. Your additions will be merged with the
[Auto DevOps template](https://gitlab.com/gitlab-org/gitlab/blob/master/lib/gitlab/ci/templates/Auto-DevOps.gitlab-ci.yml) using the behaviour described for
[`include`](../../ci/yaml/README.md#include).
It is also possible to copy and paste the contents of the [Auto DevOps template](https://gitlab.com/gitlab-org/gitlab/blob/master/lib/gitlab/ci/templates/Auto-DevOps.gitlab-ci.yml)
into your project and edit this as needed. You may prefer to do it
that way if you want to specifically remove any part of it.
## Customizing the Kubernetes namespace
> [Introduced](https://gitlab.com/gitlab-org/gitlab/issues/27630) in GitLab 12.6.
For **non**-GitLab-managed clusters, the namespace can be customized using
For example, the following configuration overrides the namespace used for
`production` deployments:
```yaml
include:
- template: Auto-DevOps.gitlab-ci.yml
production:
environment:
kubernetes:
namespace: production
```
When deploying to a custom namespace with Auto DevOps, the service account
provided with the cluster needs at least the `edit` role within the namespace.
- If the service account can create namespaces, then the namespace can be created on-demand.
- Otherwise, the namespace must exist prior to deployment.
## Using components of Auto DevOps
If you only require a subset of the features offered by Auto DevOps, you can include
individual Auto DevOps jobs into your own `.gitlab-ci.yml`. Each component job relies
on a stage that should be defined in the `.gitlab-ci.yml` that includes the template.
For example, to make use of [Auto Build](stages.md#auto-build), you can add the following to
your `.gitlab-ci.yml`:
```yaml
stages:
- build
include:
- template: Jobs/Build.gitlab-ci.yml
```
Consult the [Auto DevOps template](https://gitlab.com/gitlab-org/gitlab/blob/master/lib/gitlab/ci/templates/Auto-DevOps.gitlab-ci.yml) for information on available jobs.
## PostgreSQL database support
In order to support applications that require a database,
[PostgreSQL](https://www.postgresql.org/) is provisioned by default. The credentials to access
the database are preconfigured, but can be customized by setting the associated
[variables](#environment-variables). These credentials can be used for defining a
| `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`. |
| `AUTO_DEVOPS_BUILD_IMAGE_CNB_ENABLED` | When set to a non-empty value and no `Dockerfile` is present, Auto Build builds your application using Cloud Native Buildpacks instead of Herokuish. [More details](stages.md#auto-build-using-cloud-native-buildpacks-beta). |
| `AUTO_DEVOPS_BUILD_IMAGE_EXTRA_ARGS` | Extra arguments to be passed to the `docker build` command. Note that using quotes will not prevent word splitting. [More details](#passing-arguments-to-docker-build). |
| `AUTO_DEVOPS_BUILD_IMAGE_FORWARDED_CI_VARIABLES` | A [comma-separated list of CI variable names](#passing-secrets-to-docker-build) to be passed to the `docker build` command as secrets. |
| `AUTO_DEVOPS_CHART` | Helm Chart used to deploy your apps. Defaults to the one [provided by GitLab](https://gitlab.com/gitlab-org/charts/auto-deploy-app). |
| `AUTO_DEVOPS_CHART_REPOSITORY` | Helm Chart repository used to search for charts. Defaults to `https://charts.gitlab.io`. |
| `AUTO_DEVOPS_CHART_REPOSITORY_NAME` | From GitLab 11.11, used to set the name of the Helm repository. Defaults to `gitlab`. |
| `AUTO_DEVOPS_CHART_REPOSITORY_USERNAME` | From GitLab 11.11, used to set a username to connect to the Helm repository. Defaults to no credentials. Also set `AUTO_DEVOPS_CHART_REPOSITORY_PASSWORD`. |
| `AUTO_DEVOPS_CHART_REPOSITORY_PASSWORD` | From GitLab 11.11, used to set a password to connect to the Helm repository. Defaults to no credentials. Also set `AUTO_DEVOPS_CHART_REPOSITORY_USERNAME`. |
| `AUTO_DEVOPS_MODSECURITY_SEC_RULE_ENGINE` | From GitLab 12.5, used in combination with [Modsecurity feature flag](../../user/clusters/applications.md#web-application-firewall-modsecurity) to toggle [Modsecurity's `SecRuleEngine`](https://github.com/SpiderLabs/ModSecurity/wiki/Reference-Manual-(v2.x)#SecRuleEngine) behavior. Defaults to `DetectionOnly`. |
| `CANARY_ENABLED` | From GitLab 11.0, used to define a [deploy policy for canary environments](#deploy-policy-for-canary-environments-premium). |
| `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. |
| `KUBE_INGRESS_BASE_DOMAIN` | From GitLab 11.8, can be used to set a domain per cluster. See [cluster domains](../../user/project/clusters/index.md#base-domain) for more information. |
| `PRODUCTION_REPLICAS` | Number of replicas to deploy in the production environment. Takes precedence over `REPLICAS` and defaults to 1. For zero downtime upgrades, set to 2 or greater. |
| `REPLICAS` | Number of replicas to deploy. Defaults to 1. |
| `ROLLOUT_RESOURCE_TYPE` | From GitLab 11.9, allows specification of the resource type being deployed when using a custom Helm chart. Default value is `deployment`. |
| `ROLLOUT_STATUS_DISABLED` | From GitLab 12.0, used to disable rollout status check because it doesn't support all resource types, for example, `cronjob`. |
| `STAGING_ENABLED` | From GitLab 10.8, used to define a [deploy policy for staging and production environments](#deploy-policy-for-staging-and-production-environments). |
| `DB_INITIALIZE` | From GitLab 11.4, used to specify the command to run to initialize the application's PostgreSQL database. Runs inside the application pod. |
| `DB_MIGRATE` | From GitLab 11.4, used to specify the command to run to migrate the application's PostgreSQL database. Runs inside the application pod. |
| `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. |
| `POSTGRES_DB` | The PostgreSQL database name. Defaults to the value of [`$CI_ENVIRONMENT_SLUG`](../../ci/variables/README.md#predefined-environment-variables). Set it to use a custom database name. |
| `POSTGRES_VERSION` | Tag for the [`postgres` Docker image](https://hub.docker.com/_/postgres) to use. Defaults to `9.6.2`. |
### Security tools
The following table lists variables related to security tools.
| `SAST_CONFIDENCE_LEVEL` | Minimum confidence level of security issues you want to be reported; `1` for Low, `2` for Medium, `3` for High. Defaults to `3`. |
### Disable jobs
The following table lists variables used to disable jobs.
| `CODE_QUALITY_DISABLED` | From GitLab 11.0, used to disable the `codequality` job. If the variable is present, the job will not be created. |
| `CONTAINER_SCANNING_DISABLED` | From GitLab 11.0, used to disable the `sast:container` job. If the variable is present, the job will not be created. |
| `DAST_DISABLED` | From GitLab 11.0, used to disable the `dast` job. If the variable is present, the job will not be created. |
| `DEPENDENCY_SCANNING_DISABLED` | From GitLab 11.0, used to disable the `dependency_scanning` job. If the variable is present, the job will not be created. |
| `LICENSE_MANAGEMENT_DISABLED` | From GitLab 11.0, used to disable the `license_management` job. If the variable is present, the job will not be created. |
| `PERFORMANCE_DISABLED` | From GitLab 11.0, used to disable the `performance` job. If the variable is present, the job will not be created. |
| `REVIEW_DISABLED` | From GitLab 11.0, used to disable the `review` and the manual `review:stop` job. If the variable is present, these jobs will not be created. |
| `SAST_DISABLED` | From GitLab 11.0, used to disable the `sast` job. If the variable is present, the job will not be created. |
| `TEST_DISABLED` | From GitLab 11.0, used to disable the `test` job. If the variable is present, the job will not be created. |
### Application secret variables
> [Introduced](https://gitlab.com/gitlab-org/gitlab-foss/issues/49056) in GitLab 11.7.
Some applications need to define secret variables that are
accessible by the deployed application. Auto DevOps detects variables where the key starts with
`K8S_SECRET_` and make these prefixed variables available to the
deployed application, as environment variables.
To configure your application variables:
1. Go to your project's **Settings > CI/CD**, then expand the section
called **Variables**.
1. Create a CI Variable, ensuring the key is prefixed with
`K8S_SECRET_`. For example, you can create a variable with key
`K8S_SECRET_RAILS_MASTER_KEY`.
1. Run an Auto Devops pipeline either by manually creating a new
pipeline or by pushing a code change to GitLab.
Auto DevOps pipelines will take your application secret variables to
populate a Kubernetes secret. This secret is unique per environment.
When deploying your application, the secret is loaded as environment
variables in the container running the application. Following the
example above, you can see the secret below containing the
`RAILS_MASTER_KEY` variable.
```shell
$ kubectl get secret production-secret -n minimal-ruby-app-54 -o yaml