kcm: Kubernetes cluster manager

Prerequisites

libvirt

QEMU/KVM

Installation

go install github.com/bcrusu/kcm

Usage

Create a cluster:

kcm create mykube

Creates a cluster named 'mykube', with 2 minion nodes and one master

kcm create mykube --node-count=5 --start

Creates a cluster with 5 nodes and one master and starts it immediately

Start/stop a cluster:

kcm start mykube
kcm stop mykube

Remove a cluster:

kcm remove cluster mykube

Removes the cluster named 'mykube' and its artefacts (i.e. libvirt objects and files on disk)

Use kubectl to interact with the cluster:

kcm ctl get pods
kcm ctl apply -f FILENAME
...

The 'ctl' command calls the right version of kubectl binary and sets the "--kubeconfig" argument. It uses the following files:

• kubectl: ~/.kcm/cache/kubernetes/KUBE_VERSION/kubernetes/server/bin/kubectl
• kubeconfig: ~/.kcm/config/CLUSTER_NAME/kubeconfig/kubectl

Get cluster status:

kcm status

Outputs information similar to:

CLUSTER   STATUS    DNS DOMAIN      KUBE VERSION   COREOS VERSION
mykube    Active    mykube.kube     1.7.0-beta.2   stable/1353.8.0

NETWORK      STATUS    CIDR          DNS SERVER
kcm.mykube   Active    10.1.0.0/16   10.1.0.1

NODE      STATUS    DNS NAME             DNS LOOKUP   IP
master    Active    master.mykube.kube   OK           10.1.238.138
node1     Active    node1.mykube.kube    OK           10.1.199.19
node2     Active    node2.mykube.kube    OK           10.1.97.155

Items left to do:

• Add Kubernetes Dashboard
• Support clusters with multiple master nodes (via nginx/HAProxy)
• More netorking options (e.g. weave, calico, etc.)
• Allow users to pass configuration settings to newly-created clusters (e.g. all vars with prefix 'KCM_' should be made available to Kubernetes)

Inspiration

CCM (Cassandra Cluster Manager): A script to easily create and destroy an Apache Cassandra cluster on localhost

kube-up (deprecated)