c75898cd6a
Airship 2 is using Argo for workflow management, rather than the builtin Armada workflow functionality. Hence, this adds an apply_chart CLI command to apply a single chart at a time, so that Argo can manage the higher level orchestration. Airship 2 is also using kubernetes as opposed to Deckhand as the document store. Hence this adds an ArmadaChart kubernetes CRD, which can be consumed by the apply_chart CLI command. The chart `dependencies` feature is intentionally not supported by the CRD, as there are additional complexities to make that work, and ideally this feature should be deprecated as charts should be building in there dependencies before consumption by Armada. Functional tests are included to excercise these features against a minikube cluster. Change-Id: I2bbed83d6d80091322a7e60b918a534188467239
Armada
Armada is a tool for managing multiple Helm charts with dependencies by centralizing all configurations in a single Armada YAML and providing life-cycle hooks for all Helm releases.
Find more documentation for Armada on Read The Docs.
Overview
The Armada Python library and command line tool provide a way to synchronize a Helm (Tiller) target with an operator's intended state, consisting of several charts, dependencies, and overrides using a single file or directory with a collection of files. This allows operators to define many charts, potentially with different namespaces for those releases, and their overrides in a central place. With a single command, deploy and/or upgrade them where applicable.
Armada also supports fetching Helm chart source and then building charts from source from various local and remote locations, such as Git endpoints, tarballs or local directories.
It will also give the operator some indication of what is about to change by assisting with diffs for both values, values overrides, and actual template changes.
Its functionality extends beyond Helm, assisting in interacting with Kubernetes directly to perform basic pre- and post-steps, such as removing completed or failed jobs, running backup jobs, blocking on chart readiness, or deleting resources that do not support upgrades. However, primarily, it is an interface to support orchestrating Helm.
Components
Armada consists of two separate but complementary components:
- CLI component (mandatory) which interfaces directly with Tiller.
- API component (optional) which services user requests through a wsgi server (which in turn communicates with the Tiller server) and provides the following additional functionality:
Installation
Quick Start (via Container)
Armada can be most easily installed as a container, which requires Docker to be executed. To install Docker, please reference the following install guide.
Afterward, you can launch the Armada container by executing:
$ sudo docker run -d --net host -p 8000:8000 --name armada \
-v ~/.kube/config:/armada/.kube/config \
-v $(pwd)/examples/:/examples quay.io/airshipit/armada:latest-ubuntu_bionicManual Installation
For a comprehensive manual installation guide, please see Manual Install Guide.
Usage
To run Armada, simply supply it with your YAML-based intention for any number of charts:
$ armada apply examples/openstack-helm.yaml [ --debug ]Which should output something like this:
$ armada apply examples/openstack-helm.yaml 2017-02-10 09:42:36,753
armada INFO Cloning git:
...For more information on how to install and use Armada, please reference: Armada Quickstart.
Integration Points
Armada CLI component has the following integration points:
- Tiller manages Armada chart installations.
- Deckhand is one of the supported control document sources for Armada.
- Prometheus exporter is provided for metric data related to application of charts and collections of charts. See metrics.
In addition, Armada's API component has the following integration points:
- Keystone (OpenStack's identity service) provides authentication and support for role-based authorization.