Atlantis

Atlantis is a tool for safe collaboration on Terraform repositories.

• Introduction
• Prerequisites
• Required Configuration
• Additional manifests
• Customization
• Upgrading
  • From 2.* to 3.*
  • From 1.* to 2.*
• Testing the Deployment

Introduction

This chart creates a single pod in a StatefulSet running Atlantis. Atlantis persists Terraform plan files and lockfiles to disk for the duration of a Pull/Merge Request. These files are stored in a PersistentVolumeClaim to survive Pod failures.

Prerequisites

• Kubernetes 1.9+
• PersistentVolume support

Required Configuration

In order for Atlantis to start and run successfully:

1. At least one of the following sets of credentials must be defined:

   • github
   • gitlab
   • bitbucket
   • azuredevops

   Refer to values.yaml for detailed examples. They can also be provided directly through a Kubernetes Secret, use the variable vcsSecretName to reference it.

2. Supply a value for orgAllowlist, e.g. github.com/myorg/*.

Additional manifests

It is possible to add additional manifests into a deployment, to extend the chart. One of the reason is to deploy a manifest specific to a cloud provider ( BackendConfig on GKE for example ).

extraManifests:
  - apiVersion: cloud.google.com/v1beta1
    kind: BackendConfig
    metadata:
      name: "{{ .Release.Name }}-test"
    spec:
      securityPolicy:
        name: "gcp-cloud-armor-policy-test"

Customization

The following options are supported. See values.yaml for more detailed documentation and examples:

Parameter	Description	Default
dataStorage	Amount of storage available for Atlantis' data directory (mostly used to check out git repositories).	5Gi
atlantisUrl	Base URL of atlantis server. This URL also reflects in pull-requests CI hooks where terraform changes are displayed.	n/a
aws.config	Contents of a file to be mounted to ~/.aws/config.	n/a
aws.credentials	Contents of a file to be mounted to ~/.aws/credentials.	n/a
awsSecretName	Secret name containing AWS credentials - will override aws.credentials and aws.config. Will be used a volume mount on $HOME/.aws, so it needs a credentials key. The key config is optional. See the file templates/secret-aws.yml for more info on the Secret contents.	n/a
bitbucket.user	Name of the Atlantis Bitbucket user.	n/a
bitbucket.token	Personal access token for the Atlantis Bitbucket user.	n/a
bitbucket.secret	Webhook secret for Bitbucket repositories (Bitbucket Server only).	n/a
bitbucket.baseURL	Base URL of Bitbucket Server installation.	n/a
environment	Map of environment variables for the container.	{}
environmentSecrets	Array of Kubernetes secrets that can be used to set environment variables. See values.yaml for example.	{}
environmentRaw	Array environment variables in plain Kubernetes yaml format. See values.yaml for example.	[]
loadEnvFromSecrets	Array of Kubernetes secrets to set all key-value pairs as environment variables. See values.yaml for example.	[]
loadEnvFromConfigMaps	Array of Kubernetes ConfigMaps to set all key-value pairs as environment variables. See values.yaml for example.	[]
extraVolumes	List of additional volumes available to the pod.	[]
extraVolumeMounts	List of additional volumes mounted to the container.	[]
imagePullSecrets	List of secrets for pulling images from private registries.	[]
gitconfig	Contents of a file to be mounted to ~/.gitconfig. Use to allow redirection for Terraform modules in private git repositories.	n/a
gitconfigSecretName	Name of a pre-existing Kubernetes Secret containing a gitconfig key. Use this instead of gitconfig (optional)	n/a
command	Optionally override the command field of the Atlantis Docker container. If not set, the default Atlantis ENTRYPOINT is used. Must be an array.	n/a
github.user	Name of the Atlantis GitHub user.	n/a
github.token	Personal access token for the Atlantis GitHub user.	n/a
github.secret	Repository or organization-wide webhook secret for the Atlantis GitHub integration. All repositories in GitHub that are to be integrated with Atlantis must share the same value.	n/a
github.hostname	Hostname of your GitHub Enterprise installation.	n/a
githubApp.id	GitHub app ID. If set, GitHub authentication will be performed as an installation.	n/a
githubApp.key	A GitHub App PEM encoded private key file. If set, GitHub authentication will be performed as an installation.	n/a
githubApp.secret	Secret used to validate GitHub webhooks (see Securing your webhooks).	n/a
gitlab.user	Repository or organization-wide secret for the Atlantis GitLab,integration. All repositories in GitLab that are to be integrated with Atlantis must share the same value.	n/a
gitlab.token	Personal access token for the Atlantis GitLab user.	n/a
gitlab.secret	Webhook secret for the Atlantis GitLab integration. All repositories in GitLab that are to be integrated with Atlantis must share the same value.	n/a
gitlab.hostname	Hostname of your GitLab Enterprise installation.	n/a
azuredevops.user	Repository or organization-wide secret for the Atlantis Azure DevOps,integration. All repositories in Azure DevOps that are to be integrated with Atlantis must share the same value.	n/a
azuredevops.token	Personal access token for the Atlantis Azure DevOps user.	n/a
azuredevops.webhookUser	Webhook user for the Atlantis Azure DevOps integration.	n/a
azuredevops.webhookPassword	Webhook password for the Atlantis Azure DevOps integration. All repositories in Azure DevOps that are to be integrated with Atlantis must share the same value.	n/a
vcsSecretName	Name of a pre-existing Kubernetes Secret containing token and secret keys set to your VCS provider's API token and webhook secret, respectively. Use this instead of github.token/github.secret, etc. (optional)	n/a
podTemplate.annotations	Additional annotations to use for the StatefulSet.	n/a
podTemplate.annotations	Additional annotations to use for pods.	{}
podTemplate.labels	Additional labels to use for pods.	{}
statefulSet.annotations	Additional annotations to use for StatefulSet.	{}
statefulSet.labels	Additional labels to use for StatefulSet.	{}
terminationGracePeriodSeconds	Set terminationGracePeriodSeconds for the StatefulSet.	{}
statefulSet.securityContext	Allow customizing fsGroup/runAsUser.	{}
logLevel	Level to use for logging. Either debug, info, warn, or error.	n/a
orgAllowlist	Allowlist of repositories from which Atlantis will accept webhooks. This value must be set for Atlantis to function correctly. Accepts wildcard characters (*). Multiple values may be comma-separated.	none
orgWhitelist	Deprecated (see orgAllowlist) List of repositories from which Atlantis will accept webhooks. Accepts wildcard characters (*). Multiple values may be comma-separated.	none
config	Override atlantis main configuration by config map. It's allow some additional functionality like slack notifications.	n/a
repoConfig	Server-side Repository Configuration as a raw YAML string. Configuration is stored in ConfigMap.	n/a
defaultTFVersion	Default Terraform version to be used by atlantis server	n/a
allowForkPRs	Allow atlantis to run on fork Pull Requests	false
allowDraftPRs	Allow atlantis to run on draft Pull Requests	false
hidePrevPlanComments	Allow atlantis to hide previous plan comments	false
disableApply	Disables running atlantis apply regardless of what options are specified	false
disableApplyAll	Disables running atlantis apply without any flags	false
disableRepoLocking	Stops atlantis locking projects and or workspaces when running terraform	false
serviceAccount.create	Whether to create a Kubernetes ServiceAccount if no account matching serviceAccount.name exists.	true
serviceAccount.mount	Whether to mount the Kubernetes ServiceAccount into the pod	true
serviceAccount.name	Name of the Kubernetes ServiceAccount under which Atlantis should run. If no value is specified and serviceAccount.create is true, Atlantis will be run under a ServiceAccount whose name is the FullName of the Helm chart's instance, else Atlantis will be run under the default ServiceAccount.	n/a
serviceAccount.annotations	Additional Service Account annotations	n/a
serviceAccountSecrets.credentials	Deprecated (see googleServiceAccountSecrets) JSON string representing secrets for a Google Cloud Platform production service account. Only applicable if hosting Atlantis on GKE.	n/a
serviceAccountSecrets.credentials-staging	Deprecated (see googleServiceAccountSecrets) JSON string representing secrets for a Google Cloud Platform staging service account. Only applicable if hosting Atlantis on GKE.	n/a
googleServiceAccountSecrets	An array of Kubernetes secrets containing Google Service Account credentials. See values.yaml for examples and additional documentation.	n/a
service.port	Port of the Service.	80
service.targetPort	Target Port of the Service.	4141
service.loadBalancerSourceRanges	Array of allowlisted IP addresses for the Atlantis Service. If no value is specified, the Service will allow incoming traffic from all IP addresses (0.0.0.0/0).	n/a
service.loadBalancerIP	Expose this service on the given ip if service.type = LoadBalancerIP	n/a
storageClassName	Storage class of the volume mounted for the Atlantis data directory.	n/a
tlsSecretName	Name of a Secret for Atlantis' HTTPS certificate containing the following data items tls.crt with the public certificate and tls.key with the private key.	n/a
ingress.enabled	Whether to create a Kubernetes Ingress.	true
ingress.annotations	Additional annotations to use for the Ingress.	{}
ingress.labels	Additional labels to use for the Ingress.	{}
ingress.path	Path to use in the Ingress. Should be set to /* if using gce-ingress in Google Cloud.	/
ingress.host	Domain name Kubernetes Ingress rule looks for. Set it to the domain Atlantis will be hosted on.
ingress.hosts	List of domain names Kubernetes Ingress rule looks for. Set it to the domains in which Atlantis will be hosted on.	chart-example.local
ingress.hosts[0].paths	List of paths to use in Kubernetes Ingress rules. Should be set to /* if using gce-ingress in Google	[/]
ingress.tls	Kubernetes tls block. See Kubernetes docs for details.	[]
test.enabled	Whether to enable the test.	true
extraManifests	Add additional manifests to deploy	[]
initContainers	Containers used to initialize context for Atlantis pods	[]
extraContainers	Additionnal containers to use and depends of use cases.	[]
hostAliases[].hostnames	Hostnames for host alias entry	n/a
hostAliases[].ip	IP for host alias entry	n/a
basicAuth.username	Username for basic authentication	n/a
basicAuth.password	Password for basic authentication	n/a
commonLabels	Add Common Labels to all resources	{}
containerSecurityContext.allowPrivilegeEscalation	Whether to enable privilege escalation	n/a
containerSecurityContext.readOnlyRootFilesystem	Whether the root file system should be read-only	n/a

NOTE: All the Server Configurations are passed as Environment Variables.

Upgrading

From 2.* to 3.*

• The following value names have been removed. They are replaced by Server-side Repository Configuration
  • requireApproval
  • requireMergeable
  • allowRepoConfig

To replicate your previous configuration, run Atlantis locally with your previous flags and Atlantis will print out the equivalent repo-config, for example:

$ atlantis server --allow-repo-config --require-approval --require-mergeable --gh-user=foo --gh-token=bar --repo-allowlist='*'
WARNING: Flags --require-approval, --require-mergeable and --allow-repo-config have been deprecated.
Create a --repo-config file with the following config instead:

---
repos:
- id: /.*/
  apply_requirements: [approved, mergeable]
  allowed_overrides: [apply_requirements, workflow]
  allow_custom_workflows: true

or use --repo-config-json='{"repos":[{"id":"/.*/", "apply_requirements":["approved", "mergeable"], "allowed_overrides":["apply_requirements","workflow"], "allow_custom_workflows":true}]}'

Then use this YAML in the new repoConfig value:

repoConfig: |
  ---
  repos:
  - id: /.*/
    apply_requirements: [approved, mergeable]
    allowed_overrides: [apply_requirements, workflow]
    allow_custom_workflows: true

From 1.* to 2.*

• The following value names have changed:
  • allow_repo_config => allowRepoConfig
  • atlantis_data_storage => dataStorage NOTE: more than just a snake_case change
  • atlantis_data_storageClass => storageClassName NOTE: more than just a snake_case change
  • bitbucket.base_url => bitbucket.baseURL

Testing the Deployment

To perform a smoke test of the deployment (i.e. ensure that the Atlantis UI is up and running):

1. Install the chart. Supply your own values file or use test-values.yaml, which has a minimal set of values required in order for Atlantis to start.

   helm repo add runatlantis https://runatlantis.github.io/helm-charts
   helm install -f test-values.yaml my-atlantis runatlantis/atlantis --debug

2. Run the tests:

   helm test my-atlantis