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terraform-aws-eks-bitnami-apache-airflow

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Terraform module to deploy a multiuser Jupyterhub + Dask Cluster on an existing EKS cluster using the DaskHub helm chart. It deploys the DaskHub Helm chart, and optionally configures SSL for you if you are using a domain name on AWS hosted with Route53.


This project is part of the "BioAnalyze" project, which aims to make High Performance Compute Architecture accessible to everyone.

It's 100% Open Source and licensed under the APACHE2.

Data Science Infrastructure on AWS

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Introduction

This module installs the Bitnami Apache Airflow helm chart to an AWS EKS cluster. It will optionally setup an NGINX ingress for SSL and create AWS Route53 records.

IMPORTANT: We do not pin modules to versions in our examples because of the difficulty of keeping the versions in the documentation in sync with the latest released versions. We highly recommend that in your code you pin the version to the exact version you are using so that your infrastructure remains stable, and update versions in a systematic way so that they do not catch you by surprise.

Also, because of a bug in the Terraform registry (hashicorp/terraform#21417), the registry shows many of our inputs as required when in fact they are optional. The table below correctly indicates which inputs are required.

For a complete example, see examples/complete.

For automated tests of the complete example using bats and Terratest (which tests and deploys the example on AWS), see test.

  resource "random_string" "computed_values" {
    length           = 10
    special          = false
    lower            = true
    upper            = false
    override_special = ""
  }

  locals {
    helm_release_merged_values_file = abspath("helm_charts/airflow/computed-${random_string.computed_values.result}-values.yaml")
  }

  # If the computed-values file does not exist we must create it first
  resource "null_resource" "create_merged_file" {
    triggers = {
      always_run = timestamp()
    }
    provisioner "local-exec" {
      command = <<EOT
      touch ${local.helm_release_merged_values_file}
      EOT
    }
  }

  module "helm_release_airflow" {
    depends_on = [
      null_resource.create_merged_file,
    ]
    source  = "dabble-of-devops-bioanalyze/eks-bitnami-apache-airflow/aws"

    helm_release_name       = var.airflow_release_name
    helm_release_values_dir = abspath(var.airflow_helm_values_dir)
    # this can be named whatever you like, including values.yaml, just make sure that the file exists before starting up the module
    helm_release_merged_values_file = local.helm_release_merged_values_file

    enable_ssl              = true
    letsencrypt_email       = "hello@gmail.com"
    # This must be a domain name registered with AWS
    # And it must have a wildcard ACM
    # The module will configure SSL and at the end you will have
    # https://airflow.example.com
    aws_route53_zone_name   = "example.com."
    aws_route53_record_name = "airflow"

    context = module.this.context
  }

  output "helm_release_airflow" {
    value = module.helm_release_airflow
  }

Examples

Here is an example of using this module:

Makefile Targets

Available targets:

  help                                Help screen
  help/all                            Display help for all targets
  help/short                          This help short screen
  lint                                Lint terraform code

Requirements

Name Version
terraform >= 0.13
http >= 2.1.0
local >= 1.2
random >= 2.2

Providers

Name Version
aws n/a
kubernetes n/a
local >= 1.2
null n/a
template n/a

Modules

Name Source Version
airflow git::https://github.com/dabble-of-devops-bioanalyze/terraform-aws-eks-helm.git n/a
s3_bucket cloudposse/s3-bucket/aws n/a
this cloudposse/label/null 0.25.0

Resources

Name Type
aws_iam_policy.s3-logs-eks resource
aws_iam_role.logs resource
kubernetes_namespace.airflow_ns resource
kubernetes_service_account.eks_s3 resource
local_file.rendered_airflow_db resource
local_file.rendered_airflow_remote_logs resource
local_file.rendered_auth resource
null_resource.fernet resource
null_resource.helm_dirs resource
null_resource.sleep_airflow_update resource
aws_caller_identity.current data source
aws_elb.airflow data source
aws_iam_policy_document.assume_role_with_oidc data source
aws_iam_policy_document.s3-logs-eks data source
aws_partition.current data source
kubernetes_service.airflow data source
local_file.fernet data source
template_file.airflow_external_db data source
template_file.airflow_remote_logging data source
template_file.auth data source

Inputs

Name Description Type Default Required
additional_tag_map Additional key-value pairs to add to each map in tags_as_list_of_maps. Not added to tags or id.
This is for some rare cases where resources want additional configuration of tags
and therefore take a list of maps with tag key, value, and additional configuration.
map(string) {} no
airflow_password Initial airflow password string "Password#123" no
airflow_user Initial airflow user string "user" no
attributes ID element. Additional attributes (e.g. workers or cluster) to add to id,
in the order they appear in the list. New attributes are appended to the
end of the list. The elements of the list are joined by the delimiter
and treated as a single ID element.
list(string) [] no
aws_elb_dns_name DNS of AWS ELB for ingress controller string n/a yes
aws_elb_zone_id AWS ELB zone id for ingress controller string n/a yes
aws_route53_record_name Record name to add to aws_route_53. Must be a valid subdomain - www,app,etc string "www" no
aws_route53_zone_id AWS route_53 zone ID for airflow string "" no
aws_route53_zone_name Name of the zone to add records. Do not forget the trailing '.' - 'test.com.' string "bioanalyzedev.com." no
context Single object for setting entire context at once.
See description of individual variables for details.
Leave string and numeric variables as null to use default value.
Individual variable settings (non-null) override settings in context object,
except for attributes, tags, and additional_tag_map, which are merged.
any
{
"additional_tag_map": {},
"attributes": [],
"delimiter": null,
"descriptor_formats": {},
"enabled": true,
"environment": null,
"id_length_limit": null,
"label_key_case": null,
"label_order": [],
"label_value_case": null,
"labels_as_tags": [
"unset"
],
"name": null,
"namespace": null,
"regex_replace_chars": null,
"stage": null,
"tags": {},
"tenant": null
}
no
delimiter Delimiter to be used between ID elements.
Defaults to - (hyphen). Set to "" to use no delimiter at all.
string null no
descriptor_formats Describe additional descriptors to be output in the descriptors output map.
Map of maps. Keys are names of descriptors. Values are maps of the form
{<br> format = string<br> labels = list(string)<br>}
(Type is any so the map values can later be enhanced to provide additional options.)
format is a Terraform format string to be passed to the format() function.
labels is a list of labels, in order, to pass to format() function.
Label values will be normalized before being passed to format() so they will be
identical to how they appear in id.
Default is {} (descriptors output will be empty).
any {} no
enable_ssl Enable SSL Support? bool true no
enabled Set to false to prevent the module from creating any resources bool null no
encrypt_s3_logs n/a string "False" no
environment ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT' string null no
external_db_host n/a string "" no
external_db_name n/a string "airflow" no
external_db_port n/a number 5432 no
external_db_secret n/a string "" no
external_db_type n/a string "postgres" no
external_db_user n/a string "" no
helm_release_chart helm release chart string "airflow" no
helm_release_name helm release name string "airflow" no
helm_release_namespace helm release namespace for BioAnalyze deployment string n/a yes
helm_release_repository helm release chart repository string "https://charts.bitnami.com/bitnami" no
helm_release_values_dir Directory to put rendered values template files or additional keys. Should be helm_charts/{helm_release_name} string "helm_charts" no
helm_release_values_files helm release values files - paths values files to add to helm install --values {} list(string) [] no
helm_release_values_service_port Service port to set for exposing the airflow service string "80" no
helm_release_values_service_type Service type to set for exposing the airflow service. The default is to use the ClusterIP and an ingress. Alternative is to use a LoadBalancer, but this only recommended for testing. string "ClusterIP" no
helm_release_version helm release version string "12.0.10" no
helm_release_wait n/a bool false no
id_length_limit Limit id to this many characters (minimum 6).
Set to 0 for unlimited length.
Set to null for keep the existing setting, which defaults to 0.
Does not affect id_full.
number null no
label_key_case Controls the letter case of the tags keys (label names) for tags generated by this module.
Does not affect keys of tags passed in via the tags input.
Possible values: lower, title, upper.
Default value: title.
string null no
label_order The order in which the labels (ID elements) appear in the id.
Defaults to ["namespace", "environment", "stage", "name", "attributes"].
You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present.
list(string) null no
label_value_case Controls the letter case of ID elements (labels) as included in id,
set as tag values, and output by this module individually.
Does not affect values of tags passed in via the tags input.
Possible values: lower, title, upper and none (no transformation).
Set this to title and set delimiter to "" to yield Pascal Case IDs.
Default value: lower.
string null no
labels_as_tags Set of labels (ID elements) to include as tags in the tags output.
Default is to include all labels.
Tags with empty values will not be included in the tags output.
Set to [] to suppress all generated tags.
Notes:
The value of the name tag, if included, will be the id, not the name.
Unlike other null-label inputs, the initial setting of labels_as_tags cannot be
changed in later chained modules. Attempts to change it will be silently ignored.
set(string)
[
"default"
]
no
letsencrypt_email Email to use for https setup. Not needed unless enable_ssl string "hello@gmail.com" no
logging_level n/a string "DEBUG" no
name ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.
This is the only ID element not also included as a tag.
The "name" tag is set to the full id string. There is no tag with the value of the name input.
string null no
namespace ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique string null no
oidc_fully_qualified_subjects The fully qualified OIDC subjects to be added to the role policy set(string)
[
"sts.amazonaws.com"
]
no
provider_urls List of URLs of the OIDC Providers list [] no
regex_replace_chars Terraform regular expression (regex) string.
Characters matching the regex will be removed from the ID elements.
If not set, "/[^a-zA-Z0-9-]/" is used to remove all characters other than hyphens, letters and digits.
string null no
region AWS Region string "us-east-1" no
remote_base_log_folder n/a string "" no
remote_log_conn_id n/a string "aws_default" no
remote_logging n/a bool false no
render_cluster_issuer n/a bool false no
render_ingress n/a bool true no
stage ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release' string null no
tags Additional tags (e.g. {'BusinessUnit': 'XYZ'}).
Neither the tag keys nor the tag values will be modified by this module.
map(string) {} no
tenant ID element _(Rarely used, not included by default)_. A customer identifier, indicating who this instance of a resource is for string null no
use_existing_ingress n/a bool true no
use_external_db n/a bool false no

Outputs

Name Description
aws_elb_airflow n/a
helm_notes n/a
helm_release n/a

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Related Projects

Check out these related projects.

  • terraform-aws-eks-autoscaling - Terraform module to provision an Autoscaling EKS Cluster. Acts as a wrapper around cloudposse/terraform-aws-eks-cluster and cloudposse/terraform-aws-eks-node-groups
  • terraform-aws-eks-cluster - Terraform module to deploy an AWS EKS Cluster.
  • terraform-aws-eks-node-group - Terraform module to provision an EKS Node Group
  • Zero to Kubernetes - JupyterHub allows users to interact with a computing environment through a webpage. As most devices have access to a web browser, JupyterHub makes it is easy to provide and standardize the computing environment for a group of people (e.g., for a class of students or an analytics team).

This project will help you set up your own JupyterHub on a cloud/on-prem k8s environment and leverage its scalable nature to support a large group of users. Thanks to Kubernetes, we are not tied to a specific cloud provider.

  • Dask Gateway - Dask Gateway provides a secure, multi-tenant server for managing Dask clusters. It allows users to launch and use Dask clusters in a shared, centrally managed cluster environment, without requiring users to have direct access to the underlying cluster backend (e.g. Kubernetes, Hadoop/YARN, HPC Job queues, etc…).

  • DaskHub - This chart provides a multi-user, Dask-Gateway enabled JupyterHub. It combines the JupyterHub and Dask Gateway helm charts.

  • Dask - Dask is a flexible library for parallel computing in Python.

  • terraform-aws-ec2-autoscale-group - Terraform module to provision Auto Scaling Group and Launch Template on AWS

  • terraform-aws-ec2-instance - Terraform module for providing a general purpose EC2 instance

  • terraform-aws-ec2-instance-group - Terraform module for provisioning multiple general purpose EC2 hosts for stateful applications

  • terraform-null-label - Terraform module designed to generate consistent names and tags for resources. Use terraform-null-label to implement a strict naming convention.

References

For additional context, refer to some of these links.

Help

Got a question? We got answers.

File a GitHub issue, send us an jillian@dabbleofdevops.com.

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  • Scientific Workflow Automation and Optimization. Got workflows that are giving you trouble? Let's work together to ensure that your analyses run with or without your scientists being fully caffeinated.
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Contributing

Bug Reports & Feature Requests

Please use the issue tracker to report any bugs or file feature requests.

Developing

If you are interested in being a contributor and want to get involved in developing this project or help out with other projects, I would love to hear from you! Shoot me an email at jillian@dabbleofdevops.com.

In general, PRs are welcome. We follow the typical "fork-and-pull" Git workflow.

  1. Fork the repo on GitHub
  2. Clone the project to your own machine
  3. Commit changes to your own branch
  4. Push your work back up to your fork
  5. Submit a Pull Request so that we can review your changes

Developer Notes

The README.md is created using the standard CloudPosse template that has been modified to use BioAnalyze information and URLs, and other documentation is generated using jupyter-book.

Terraform code does not render properly when using the literalinclude directive, so instead we use pygmentize to render it to html which is included directly.

.. raw:: html
   :file: ./_html/main.tf.html

NOTE: Be sure to merge the latest changes from "upstream" before making a pull request!

Copyrights

Copyright © 2020-2022 Dabble of DevOps, SCorp

License

License

See LICENSE for full details.

Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

  https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied.  See the License for the
specific language governing permissions and limitations
under the License.

Trademarks

All other trademarks referenced herein are the property of their respective owners.

Contributors

| Jillian Rowe
Jillian Rowe |

Learn more at Dabble of DevOps

Sponsor

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