Helm Resource for Concourse

Deploy to Kubernetes Helm from Concourse.

Forked from linkyard/concourse-helm-resource.
Modified to support autogeneration of kubeconfig for AWS EKS and AWS STS AssumeRole.

Quick fixed.

Installing

Add the resource type to your pipeline:

resource_types:
- name: helm
  type: docker-image
  source:
    repository: linkyard/concourse-helm-resource

Source Configuration

• cluster_url: Required. URL to Kubernetes Master API service
• cluster_ca: Optional. Base64 encoded PEM. Required if cluster_url is https.
• token: Optional. Bearer token for Kubernetes. This, 'token_path' or admin_key/admin_cert are required if cluster_url is https.
• admin_key: Optional. Base64 encoded PEM. Required if cluster_url is https and no token or 'token_path' is provided.
• admin_cert: Optional. Base64 encoded PEM. Required if cluster_url is https and no token or 'token_path' is provided.
• release: Optional. Name of the release (not a file, a string). (Default: autogenerated by helm)
• namespace: Optional. Kubernetes namespace the chart will be installed into. (Default: default)
• helm_init_server: Optional. Installs helm into the cluster if not already installed. (Default: false)
• helm_history_max: Optional. Limits the maximum number of revisions. (Default: 0 = no limit)
• tiller_namespace: Optional. Kubernetes namespace where tiller is running (or will be installed to). (Default: kube-system)
• tiller_service_account: Optional Name of the service account that tiller will use (only applies if helm_init_server is true).
• repos: Optional. Array of Helm repositories to initialize, each repository is defined as an object with properties name, url (required) username and password (optional).
• helm_host: Optional Address of Tiller. Skips helm discovery process. (only applies if helm_init_server is false).
• tls_enabled: Optional Uses TLS for all interactions with Tiller. (Default: false)
• helm_ca: Optional Private CA that is used to issue certificates for Tiller clients and servers (only applies if tls_enabled is true).
• helm_cert: Optional Certificate for Client (only applies if tls_enabled is true).
• helm_key: Optional Key created for Client when doing a secure Tiller install (only applies if tls_enabled is true).
• tiller_cert: Optional Certificate for Tiller (only applies if tls_enabled and helm_init_server are true).
• tiller_key: Optional Key created for Tiller when doing a secure Tiller install (only applies if tls_enabled and helm_init_server are true).
• proxy_url: Optional Sets http and https proxy_url.
• no_proxy_config: Optional Sets no proxy

Source Configuration - AWS EKS options

• use_aws_iam_authenticator: Optional. If true, the aws_iam_authenticator, required for connecting with EKS, is used.
• assume_aws_role: Optional. When using aws_iam_authenticator. If true, a role will be assumed before using the aws_iam_authenticator to connect to EKS.
• aws_region: Optional. When using the optional aws_iam_authenticator and optional assume_aws_role, setting the aws_region is required. This defaults to eu-west-1
• aws_eks_cluster_name: Optional. the AWS EKS cluster name, required when use_aws_iam_authenticator or use_awscli_eks_auth is true.

AWS CLI shortcut

• use_awscli_eks_auth: Optional Defaults to false. If "true", uses the awscli generate the kube config. You can even leave out cluster_url and cluster_ca then. Required is only the aws_eks_cluster_name

Behavior

check: Check for new releases

Any new revisions to the release are returned, no matter their current state. The release must be specified in the source for check to work.

in: Not Supported

out: Deploy the helm chart

Deploys a Helm chart onto the Kubernetes cluster. Tiller must be already installed on the cluster.

Parameters

• chart: Required. Either the file containing the helm chart to deploy (ends with .tgz) or the name of the chart (e.g. stable/mysql).
• namespace: Optional. Either a file containing the name of the namespace or the name of the namespace. (Default: taken from source configuration).
• release: Optional. Either a file containing the name of the release or the name of the release. (Default: taken from source configuration).
• values: Optional. File containing the values.yaml for the deployment. Supports setting multiple value files using an array.
• override_values: Optional. Array of values that can override those defined in values.yaml. Each entry in the array is a map containing a key and a value or path. Value is set directly while path reads the contents of the file in that path. A hide: true parameter ensures that the value is not logged and instead replaced with ***HIDDEN***. A type: string parameter makes sure Helm always treats the value as a string (uses the --set-string option to Helm; useful if the value varies and may look like a number, eg. if it's a Git commit hash).
• token_path: Optional. Path to file containing the bearer token for Kubernetes. This, 'token' or admin_key/admin_cert are required if cluster_url is https.
• version: Optional Chart version to deploy, can be a file or a value. Only applies if chart is not a file.
• delete: Optional. Deletes the release instead of installing it. Requires the name. (Default: false)
• test: Optional. Test the release instead of installing it. Requires the release. (Default: false)
• purge: Optional. Purge the release on delete. (Default: false)
• replace: Optional. Replace deleted release with same name. (Default: false)
• force: Optional. Force resource update through delete/recreate if needed. (Default: false)
• devel: Optional. Allow development versions of chart to be installed. This is useful when wanting to install pre-release charts (i.e. 1.0.2-rc1) without having to specify a version. (Default: false)
• debug: Optional. Dry run the helm install with the debug flag which logs interpolated chart templates. (Default: false)
• wait_until_ready: Optional. Set to the number of seconds it should wait until all the resources in the chart are ready. (Default: 0 which means don't wait).
• recreate_pods: Optional. This flag will cause all pods to be recreated when upgrading. (Default: false)
• show_diff: Optional. Show the diff that is applied if upgrading an existing successful release. Will not be used when devel is set. (Default: false)
• exit_after_diff: Optional. Show the diff but don't actually install/upgrade. (Default: false)
• reuse_values: Optional. When upgrading, reuse the last release's values. (Default: false)

Example

Out

Define the resource:

resources:
- name: myapp-helm
  type: helm
  source:
    cluster_url: https://kube-master.domain.example
    cluster_ca: _base64 encoded CA pem_
    admin_key: _base64 encoded key pem_
    admin_cert: _base64 encoded certificate pem_
    repos:
      - name: some_repo
        url: https://somerepo.github.io/charts

Add to job:

jobs:
  # ...
  plan:
  - put: myapp-helm
    params:
      chart: source-repo/chart-0.0.1.tgz
      values: source-repo/values.yaml
      override_values:
      - key: replicas
        value: 2
      - key: version
        path: version/number # Read value from version/number
      - key: secret
        value: ((my-top-secret-value)) # Pulled from a credentials backend like Vault
        hide: true # Hides value in output
      - key: image.tag
        path: version/image_tag # Read value from version/number
        type: string            # Make sure it's interpreted as a string by Helm (not a number)

Example EKS config:

resource_types:
- name: helm
  type: docker-image
  source:
    repository: yourrepo/concourse-helm-eks-resource

standard-artifactory-helm-source: &STANDARD-ARTIFACTORY-HELM-SOURCE
    use_awscli_eks_auth: "true"
    repos:
      - name: {{ artifactory.repository }}
        url: {{ artifactory.url }}/{{ artifactory.repository }}
        username: {{ artifactory.user }}
        password: "{{ artifactory_password }}"

- name: fluentd-chart
  type: helm
  source:
    <<: *STANDARD-ARTIFACTORY-HELM-SOURCE
    aws_eks_cluster_name: someekscluster
    assume_aws_role: arn:aws:iam::{{someaccount}}:role/somerole
    namespace: kube-system
    release: fluentd

jobs:
- name: helm-rollout-on-{{somecluster}}
  plan:
  - get: values
    trigger: true
  - put: fluentd-chart-on-{{account}}
    params:
      chart: {{ artifactory.repository }}/fluentd-cloudwatch
      values: values/kubernetes/charts/fluentd/values.yaml
      recreate_pods: true