kpm 0.24.0

KPM cli

[](https://travis-ci.org/coreos/kpm)

if you have any question you can **chat** with us [](https://kubespray.slack.com)

# KPM

KPM is a tool to deploy and manage application stacks on kubernetes.

KPM provides the glue between kubernetes resources (ReplicaSet, DaemonSet, Secrets...). It defines a package as a composition of kubernetes resources and dependencies to other packages.

##### Versioning and rollbacks

KPM uses a global registry, packages are immediately accessible and visible to the community. Versioning is strong and was easy to implement: https://kpm.kubespray.io


##### Clustered applications and persistent-storage !

- How to scale database slaves(postgresql/mysql/redis) ?
- How to deploy a production-grade elasticsearch/rabbitmq/zookeep/etcd/ clusters on kubernetes?
It requires stable network identity and a unique storage per pod!

---> KPM creates multiple variation of a single template with simplicity

Creating a 3 node rabbitmq cluster is easy:

1. List the resources
2. Add the keyword `sharded: true` to enable unique variation
3. List the shards and define

```
resources:
- name: rabbitmq
file: rabbitmq-rc.yaml
type: replicationcontroller
sharded: yes

- name: rabbitmq
file: rabbitmq-svc.yaml
type: service
sharded: yes

# LB to any of the rabbitmq shard
- name: rabbitmq
file: rabbitmq-umbrella-svc.yaml
type: service

shards:
- name: hare
variables:
data_volume: {name: data, persistentVolumeClaim: {claimName: claim-hare}}
- name: bunny
variables:
data_volume: {name: data, persistentVolumeClaim: {claimName: claim-bunny}}
- name: rabbit-on-ram
variables:
data_volume: {name: data, emptyDir: ""}
args: [--ram]
```
Demo:
[](https://asciinema.org/a/2ktj7kr2d2m3w25xrpz7mjkbu?speed=2)


##### Server-side
KPM is an API with an command line interface, its major difference in terms of design and possible integration.

--> We wanted a tool that could be integrated anywhere, for that KPM is building the package server side.
Clients are brainless and easy to implement. As a POC we integrated KPM to a fork of https://github.com/kubernetes/dashboard in less than a day:
https://youtu.be/7SJ6p38W-WM


## Install kpm

##### From Pypi

kpm is a python2 package and available on pypi
```
$ sudo pip install kpm -U
````

##### From git

```
git clone https://github.com/coreos/kpm.git kpm-cli
cd kpm-cli
sudo make install
```

### Configuration

KPM uses `kubectl` to communicate with the kubernetes cluster.
Check if the cluster is accessible:
```bash
$ kubectl version
Client Version: version.Info{Major:"1", Minor:"1", GitVersion:"v1.1.4", GitCommit:"a5949fea3a91d6a50f40a5684e05879080a4c61d", GitTreeState:"clean"}
Server Version: version.Info{Major:"1", Minor:"1", GitVersion:"v1.1.4", GitCommit:"a5949fea3a91d6a50f40a5684e05879080a4c61d", GitTreeState:"clean"}

```

### List packages

- All packages: `kpm list`
- Filter by user: `kpm -u username`

The website [https://kpm.kubespray.io](https://kpm.kubespray.io) has more advanced search and browsing featutres than the CLI.

### Deploy an application

`kpm deploy package_name [-v VERSION] [--namespace namespace]`
```
$ kpm deploy ant31/rocketchat --namespace myns
create ant31/rocketchat

package version type name namespace status
---------------- --------- --------------------- ---------- ----------- --------
ant31/mongodb 1.0.0 namespace myns myns created
ant31/mongodb 1.0.0 service mongodb myns created
ant31/mongodb 1.0.0 replicationcontroller mongodb myns created
ant31/rocketchat 1.6.2 namespace myns myns ok
ant31/rocketchat 1.6.2 service rocketchat myns created
ant31/rocketchat 1.6.2 replicationcontroller rocketchat myns created
```

It deploys the package and its dependencies.
The command can be executed multiple times, kpm detects changes in resource and apply only the modified ones.

### Uninstall an application

The opposite action to `deploy` is the `remove` command. It performs a delete on all resources created by `deploy`. It's possible to mark some resources as `protected`.

`Namespace` resources are protected by default.

```
kpm remove ant31/rocketchat --namespace demo
package version type name namespace status
---------------- --------- --------------------- ---------- ----------- ---------
ant31/mongodb 1.0.0 namespace myns myns protected
ant31/mongodb 1.0.0 service mongodb myns deleted
ant31/mongodb 1.0.0 replicationcontroller mongodb myns deleted
ant31/rocketchat 1.6.2 namespace myns myns protected
ant31/rocketchat 1.6.2 service rocketchat myns deleted
ant31/rocketchat 1.6.2 replicationcontroller rocketchat myns deleted
```


=======
History
=======

0.1.0 (2016-2-22)
------------------

* First release on PyPI.