mirror of https://github.com/helm/helm
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
182 lines
6.2 KiB
182 lines
6.2 KiB
# Deployment Manager
|
|
|
|
[](http://goreportcard.com/report/kubernetes/deployment-manager)
|
|
|
|
Deployment Manager (DM) provides parameterized templates for Kubernetes clusters.
|
|
|
|
You can use it deploy ready-to-use types, such as:
|
|
* [Replicated Service](types/replicatedservice/v1)
|
|
* [Redis](types/redis/v1)
|
|
|
|
Types live in ordinary Github repositories. This repository is a DM type registry.
|
|
|
|
You can also use DM to deploy simple templates that use types, such as:
|
|
|
|
* [Guestbook](examples/guestbook/guestbook.yaml)
|
|
* [Deployment Manager](examples/bootstrap/bootstrap.yaml)
|
|
|
|
A template is just a `YAML` file that supplies parameters. (Yes, you're reading
|
|
that second example correctly. It uses DM to deploy itself.
|
|
See [examples/bootstrap/README.md](examples/bootstrap/README.md) for more information.)
|
|
|
|
DM runs server side, in your Kubernetes cluster, so it can tell you what types
|
|
you've instantiated there, what instances you've created of a given type, and even
|
|
how the instances are organized. So, you can ask questions like:
|
|
|
|
* What Redis instances are running in this cluster?
|
|
* What Redis master and slave services are part of this Redis instance?
|
|
* What pods are part of this Redis slave?
|
|
|
|
Because DM stores its state in the cluster, not on your workstation, you can ask
|
|
those questions from any client at any time.
|
|
|
|
Please hang out with us in
|
|
[the Slack chat room](https://kubernetes.slack.com/messages/sig-configuration/)
|
|
and/or
|
|
[the Google Group](https://groups.google.com/forum/#!forum/kubernetes-sig-config)
|
|
for the Kubernetes configuration SIG. Your feedback and contributions are welcome.
|
|
|
|
## Installing Deployment Manager
|
|
|
|
Follow these 3 steps to install DM:
|
|
|
|
1. Make sure your Kubernetes cluster is up and running, and that you can run
|
|
`kubectl` commands against it.
|
|
1. Clone this repository into the src folder of your GOPATH, if you haven't already.
|
|
1. Use `kubectl` to install DM into your cluster:
|
|
|
|
```
|
|
kubectl create -f install.yaml
|
|
```
|
|
|
|
That's it. You can now use `kubectl` to see DM running in your cluster:
|
|
|
|
```
|
|
kubectl get pod,rc,service
|
|
```
|
|
|
|
If you see expandybird-service, manager-service, resourcifier-service, and
|
|
expandybird-rc, manager-rc and resourcifier-rc with pods that are READY, then DM
|
|
is up and running!
|
|
|
|
The easiest way to interact with Deployment Manager is through `kubectl` proxy:
|
|
|
|
```
|
|
kubectl proxy --port=8001 &
|
|
```
|
|
|
|
This command starts a proxy that lets you interact with the Kubernetes api
|
|
server through port 8001 on localhost. `dm` uses
|
|
`http://localhost:8001/api/v1/proxy/namespaces/default/services/manager-service:manager`
|
|
as the default service address for DM.
|
|
|
|
## Using Deployment Manager
|
|
|
|
You can use `dm` to deploy a type from the command line. This command deploys a
|
|
redis cluster with two workers from the type definition in this repository:
|
|
|
|
```
|
|
dm deploy redis/v1
|
|
```
|
|
|
|
When you deploy a type, you can optionally supply values for input parameters,
|
|
like this:
|
|
|
|
```
|
|
dm --properties workers=3 deploy redis/v1
|
|
```
|
|
|
|
When you deploy a type, `dm` generates a template from the type and input
|
|
parameters, and then deploys it.
|
|
|
|
You can also deploy an existing template, or read one from `stdin`. This command
|
|
deploys the canonical Guestbook example from the examples directory:
|
|
|
|
```
|
|
dm deploy examples/guestbook/guestbook.yaml
|
|
```
|
|
|
|
You can now use `kubectl` to see Guestbook running:
|
|
|
|
```
|
|
kubectl get service
|
|
```
|
|
|
|
Look for frontend-service. If your cluster supports external load balancing, it
|
|
will have an external IP assigned to it, and you can navigate to it in your browser
|
|
to see the guestbook in action.
|
|
|
|
For more information about this example, see [examples/guestbook/README.md](examples/guestbook/README.md)
|
|
|
|
## Additional commands
|
|
|
|
The command line tool makes it easy to configure a cluster from a set of predefined
|
|
types. Here's a list of available commands:
|
|
|
|
```
|
|
expand Expands the supplied template(s)
|
|
deploy Deploys the supplied type or template(s)
|
|
list Lists the deployments in the cluster
|
|
get Retrieves the supplied deployment
|
|
delete Deletes the supplied deployment
|
|
update Updates a deployment using the supplied template(s)
|
|
deployed-types Lists the types deployed in the cluster
|
|
deployed-instances Lists the instances of the supplied type deployed in the cluster
|
|
types Lists the types in the current registry
|
|
describe Describes the supplied type in the current registry
|
|
|
|
```
|
|
|
|
## Uninstalling Deployment Manager
|
|
|
|
You can uninstall Deployment Manager using the same configuration file:
|
|
|
|
```
|
|
kubectl delete -f install.yaml
|
|
```
|
|
|
|
## Creating a type registry
|
|
|
|
All you need to create a type registry is a Github repository with top level file
|
|
named `registry.yaml`, and a top level folder named `types` that contains type definitions.
|
|
|
|
A type definition is just a folder that contains one or more versions, like `/v1`,
|
|
`/v2`, etc.
|
|
|
|
A version is just a folder that contains a type definition. As you can see from the
|
|
examples above, a type definition is just a Python or [Jinja](http://jinja.pocoo.org/)
|
|
file plus an optional schema.
|
|
|
|
## Building the container images
|
|
|
|
This project runs Deployment Manager on Kubernetes as three replicated services.
|
|
By default, install.yaml uses prebuilt images stored in Google Container Registry
|
|
to install them. However, you can build your own container images and push them
|
|
to your own project in the Google Container Registry:
|
|
|
|
1. Set the environment variable PROJECT to the name of a project known to gcloud.
|
|
1. Run the following command:
|
|
|
|
```
|
|
make push
|
|
```
|
|
|
|
## Design of Deployment Manager
|
|
|
|
There is a more detailed [design document](docs/design/design.md) available.
|
|
|
|
## Status of the project
|
|
|
|
This project is still under active development, so you might run into issues. If
|
|
you do, please don't be shy about letting us know, or better yet, contribute a
|
|
fix or feature. We use the same [development process](CONTRIBUTING.md) as the main
|
|
Kubernetes repository.
|
|
|
|
## Relationship to Google Cloud Platform
|
|
DM uses the same concepts and languages as
|
|
[Google Cloud Deployment Manager](https://cloud.google.com/deployment-manager/overview),
|
|
but creates resources in Kubernetes clusters, not in Google Cloud Platform projects.
|
|
|
|
|
|
|