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Getting Started with kops on OpenStack

WARNING: OpenStack support on kops is currently alpha meaning it is in the early stages of development and subject to change, please use with caution.

Source your openstack RC

The Cloud Config used by the kubernetes API server and kubelet will be constructed from environment variables in the openstack RC file. The openrc.sh file is usually located under API access.

source openstack.rc

If you are authenticating by username OS_DOMAIN_NAME or OS_DOMAIN_ID must manually be set.

export OS_DOMAIN_NAME=<USER_DOMAIN_NAME>

Environment Variables

It is important to set the following environment variables:

export KOPS_STATE_STORE=swift://<bucket-name> # where <bucket-name> is the name of the Swift container to use for kops state

# this is required since OpenStack support is currently in alpha so it is feature gated
export KOPS_FEATURE_FLAGS="AlphaAllowOpenStack"

If your OpenStack does not have Swift you can use any other VFS store, such as S3.

Creating a Cluster

# to see your etcd storage type
openstack volume type list

# coreos (the default) + flannel overlay cluster in Default
kops create cluster \
  --cloud openstack \
  --name my-cluster.k8s.local \
  --state ${KOPS_STATE_STORE} \
  --zones nova \
  --network-cidr 10.0.0.0/24 \
  --image <imagename> \
  --master-count=3 \
  --node-count=1 \
  --node-size <flavorname> \
  --master-size <flavorname> \
  --etcd-storage-type <volumetype> \
  --api-loadbalancer-type public \
  --topology private \
  --bastion \
  --ssh-public-key ~/.ssh/id_rsa.pub \
  --networking weave \
  --os-ext-net <externalnetworkname>

# to update a cluster
kops update cluster my-cluster.k8s.local --state ${KOPS_STATE_STORE} --yes

# to delete a cluster
kops delete cluster my-cluster.k8s.local --yes

Optional flags

--os-kubelet-ignore-az=true Nova and Cinder have different availability zones, more information Kubernetes docs
--os-octavia=true If Octavia Loadbalancer api should be used instead of old lbaas v2 api.
--os-dns-servers=8.8.8.8,8.8.4.4 You can define dns servers to be used in your cluster if your openstack setup does not have working dnssetup by default

Using external cloud controller manager

If you want use External CCM in your installation, this section contains instructions what you should do to get it up and running.

Enable featureflag:

export KOPS_FEATURE_FLAGS=AlphaAllowOpenstack,+EnableExternalCloudController

Create cluster without --yes flag (or modify existing cluster):

kops edit cluster <cluster>

Add following to clusterspec:

  cloudControllerManager:
    image: jesseh/occm:latest <- you can use this or compile your own
    logLevel: 2

Finally

kops update cluster --name <cluster> --yes

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