airship/promenade
Code Issues Proposed changes
26e6792690
promenade/docs/source/configuration/kubernetes-node.rst
Mark Burnett 95643147c5 Migrate to self hosted using charts 
This change includes several interconnected features:

* Migration to Deckhand-based configuration.  This is integrated here,
  because new configuration data were needed, so it would have been
  wasted effort to either implement it in the old format or to update
  the old configuration data to Dechkand format.
* Failing faster with stronger validation.  Migration to Deckhand
  configuration was a good opportunity to add schema validation, which
  is a requirement in the near term anyway.  Additionally, rendering
  all templates up front adds an additional layer of "fail-fast".
* Separation of certificate generation and configuration assembly into
  different commands.  Combined with Deckhand substitution, this creates
  a much clearer distinction between Promenade configuration and
  deployable secrets.
* Migration of components to charts.  This is a key step that will
  enable support for dynamic node management.  Additionally, this paves
  the way for significant configurability in component deployment.
* Version of kubelet is configurable & controlled via download url.
* Restructuring templates to be more intuitive.  Many of the templates
  require changes or deletion due to the migration to charts.
* Installation of pre-configured useful tools on hosts, including calicoctl.
* DNS is now provided by coredns, which is highly configurable.

Change-Id: I9f2d8da6346f4308be5083a54764ce6035a2e10c
2017-10-17 13:29:46 -05:00

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Kubernetes Node

Configuration for a basic node in the cluster.

Sample Document

Here is a sample document:

schema: promenade/KubernetesNode/v1
metadata:
  schema: metadata/Document/v1
  name: n1
  layeringDefinition:
    abstract: false
    layer: site
data:
  hostname: n1
  ip: 192.168.77.11
  join_ip: 192.168.77.10
  labels:
    static:
      - node-role.kubernetes.io/master=
    dynamic:
      - calico-etcd=enabled
      - kubernetes-apiserver=enabled
      - kubernetes-controller-manager=enabled
      - kubernetes-etcd=enabled
      - kubernetes-scheduler=enabled
      - ucp-control-plane=enabled

Host Information

Essential host-specific information is specified in this document, including the hostname, ip, and join_ip.

The join_ip is used to specify which host should be used when adding a node to the cluster.

Labels

Kubernetes labels can be specified under the labels key in two ways:

  1. Via the static key, which is a list of labels to be applied immediately when the kubelet process starts.
  2. Via the dynamic key, which is a list of labels to be applied after the node is marked as Ready by Kubernetes.