HostSystem¶

Sample Document to run containers in Docker runtime¶

schema: promenade/HostSystem/v1
metadata:
  schema: metadata/Document/v1
  name: host-system
  layeringDefinition:
    abstract: false
    layer: site
data:
  files:
    - path: /opt/kubernetes/bin/kubelet
      tar_url: https://dl.k8s.io/v1.20.5/kubernetes-node-linux-amd64.tar.gz
      tar_path: kubernetes/node/bin/kubelet
      mode: 0555
  images:
    haproxy: haproxy:1.8.3
    helm:
      helm: lachlanevenson/k8s-helm:v2.14.0
    monitoring_image: busybox:1.28.3
  packages:
    repositories:
      - deb [arch=amd64] https://download.docker.com/linux/ubuntu bionic stable
    keys:
      - |-
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        =0YYh
        -----END PGP PUBLIC KEY BLOCK-----
    additional:
      - curl
      - jq
      - chrony
    required:
      runtime: docker-ce=5:19.03.8~3-0~ubuntu-bionic
      socat: socat=1.7.3.1-1

Sample Document to run containers in Containerd runtime¶

schema: promenade/HostSystem/v1
metadata:
  schema: metadata/Document/v1
  name: host-system
  layeringDefinition:
    abstract: false
    layer: site
data:
  files:
    - path: /opt/kubernetes/bin/kubelet
      tar_url: https://dl.k8s.io/v1.20.5/kubernetes-node-linux-amd64.tar.gz
      tar_path: kubernetes/node/bin/kubelet
      mode: 0555
  images:
    haproxy: haproxy:1.8.3
    helm:
      helm: lachlanevenson/k8s-helm:v2.14.0
    monitoring_image: busybox:1.28.3
  packages:
    additional:
      - curl
      - jq
      - chrony
    required:
      runtime: containerd
      socat: socat=1.7.3.1-1

Files¶

A list of files to be written to the host. Files can be given as precise content, extracted from a tarball specified by url, or downloaded from a url:

- path: /etc/direct-content
  content: |-
    This
    exact
    text
- path: /etc/from-tar
  tar_url: http://example.com/file.tgz
  tar_source: dir/file.txt
- path: /etc/from-url
  url: http://example.com/file

Images¶

Core Images¶

These images are used for essential functionality:

haproxy: HAProxy is configured and used for Kubernetes API discovery during bootstrapping.
kubectl: Used for label application and validation tasks during bootstrapping.

Convenience Images¶

The helm image is available for convenience.

Packages¶

Repository Configuration¶

Additional APT repositories can be configured using the repositories and keys fields of the SystemPackages document:

repositories: A list of APT source lines to be configured during genesis or join.
keys: A list of public PGP keys that can be used to verify installed packages.

Package Configuration¶

The required key specifies packages that are required for all deployments, and the additional key allows arbitrary additional system packages to be installed. The additional key is particularly useful for installing packages such as ceph-common.