Kubernetes on RancherOS (take 2)

TODO: write something about it.

Launch

We'll launch Kubernetes on RancherOS on Amazon EC2.

Choose rancheros-v0.3.1-hvm-1 image.

Configure Instance Details -> Advanced Details

Enter User data. Use either:

#cloud-config
rancher:
  environment:
    ETCD_DISCOVERY: <discovery_url>
    FLANNEL_NETWORK: <flannel_network>
    K8S_MASTER_PORT: 8080
    K8S_PORTAL_NET: 10.100.0.0/16
  services_include:
  - https://raw.githubusercontent.com/imikushin/rancheros-k8s/master/k8s-common.yml: true
  - https://raw.githubusercontent.com/imikushin/rancheros-k8s/master/k8s-master.yml: true

or:

#cloud-config
rancher:
  environment:
    ETCD_DISCOVERY: <discovery_url>
    FLANNEL_NETWORK: <flannel_network>
  services_include:
  - https://raw.githubusercontent.com/imikushin/rancheros-k8s/master/k8s-common.yml: true
  - https://raw.githubusercontent.com/imikushin/rancheros-k8s/master/k8s-minion.yml: true

as a template.

Replace <discovery_url> with a real NEW discovery URL for your cluster, e.g. https://discovery.etcd.io/daa02a8fafee1519ea54795a14965d3c

Replace <flannel_network> with a CIDR range for flannel overlay network. This CIDR should not overlap with any existing network you are using, e.g. 10.255.0.0/16

Every time you recreate your cluster, get a new etcd discovery URL for use in your instances' cloud-config

curl "https://discovery.etcd.io/new?size=1"

WARNING: In case you try to reuse this URL for another cluster, your etcd nodes will try to become peers in another (possibly dead) cluster.

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Copyright (c) 2015 Ivan Mikushin