Pharos init command for cluster.yml bootstrapping

[kke]

Fixes #1276

Adds a pharos init subcommand for creating an initial pharos cluster.yml configuration file.

Help

$ pharos init --help
Usage:
    pharos init [OPTIONS]

  Create a Pharos cluster configuration

Options:
    -c, --config FILE             output filename (default: "cluster.yml")
    --defaults                    include all configuration default values
    -m, --master HOST             master host [user@]address[:port]
    -w, --worker HOST             worker host [user@]address[:port]
    -b, --bastion HOST            bastion (ssh proxy) host [user@]address[:port]
    -n, --name NAME               cluster name
    -e, --env KEY=VALUE           host environment variables (can be given multiple times)
    -i, --ssh-key-path PATH       ssh key path
    -h, --help                    print help
    --[no-]color                  colorize output (default: true)
    -v, --version                 print pharos version
    -d, --debug                   enable debug output (default: $DEBUG)

No params:

$ pharos init; cat cluster.yml

-->

# For full configuration reference, see https://pharos.sh/docs/configuration/
---
name: dark-wind-5414

host_defaults: &host_defaults
  user: kimmo
  ssh_key_path: ~/.ssh/id_rsa
  ssh_port: 22
  # environment:
  #   HTTP_PROXY: 192.168.0.1
  # bastion:
  #   address: 192.168.0.1
  #   user: bastion
  #   ssh_key_path: ~/.ssh/id_rsa

hosts:
  - <<: *host_defaults
    address: 10.0.0.1
    user:
    private_address: 172.16.0.1
    role: master
  - <<: *host_defaults
    address: 10.0.0.2
    user:
    private_address: 172.16.0.2
    role: worker

network:
  provider: weave

addons:
  ingress-nginx:
    enabled: true

Pharos::Config defaults:

$ pharos init --defaults; cat cluster.yml

--->

---
name: white-bird-6458
hosts:
- ssh_key_path: "~/.ssh/id_rsa"
  user: kimmo
  address: 10.0.0.1
  private_address: 172.16.0.1
  role: master
- ssh_key_path: "~/.ssh/id_rsa"
  user: kimmo
  address: 10.0.0.2
  private_address: 172.16.0.2
  role: worker
network:
  provider: weave
  service_cidr: 10.96.0.0/12
  pod_network_cidr: 10.32.0.0/12
  node_local_dns_cache: true
  firewalld:
    enabled: false
    open_ports:
    - port: '22'
      protocol: tcp
      roles:
      - "*"
    - port: '80'
      protocol: tcp
      roles:
      - worker
    - port: '443'
      protocol: tcp
      roles:
      - worker
    - port: '6443'
      protocol: tcp
      roles:
      - master
    - port: 30000-32767
      protocol: tcp
      roles:
      - "*"
    - port: 30000-32767
      protocol: udp
      roles:
      - "*"
  weave:
    no_masq_local: false
  calico:
    ipip_mode: Always
    nat_outgoing: true
    environment: {}
    mtu: 1500
  custom: {}
kube_proxy:
  mode: iptables
api: {}
etcd: {}
cloud: {}
authentication:
  token_webhook: {}
  oidc: {}
audit:
  webhook: {}
  file: {}
kubelet:
  read_only_port: false
control_plane:
  use_proxy: false
telemetry:
  enabled: true
pod_security_policy:
  default_policy: 00-pharos-privileged
image_repository: registry.pharos.sh/kontenapharos
addon_paths: []
addons: {}
container_runtime:
  insecure_registries: []

Initialize with ssh user@host and bastion

$ pharos init -m vagrant@192.168.100.100 -w vagrant@10.0.0.1:2444 -w root@10.0.0.2 -b bastion@127.0.0.1:224; cat cluster.yml

-->

# For full configuration reference, see https://pharos.sh/docs/configuration/
---
name: billowing-river-7649

host_defaults: &host_defaults
  user: vagrant
  ssh_key_path: ~/.ssh/id_rsa
  ssh_port: 22
  # environment:
  #   HTTP_PROXY: 192.168.0.1
  bastion:
    address: 127.0.0.1
    user: bastion
    ssh_port: 224
    # ssh_key_path: ~/.ssh/id_rsa

hosts:
  - <<: *host_defaults
    address: 192.168.100.100
    role: master
  - <<: *host_defaults
    address: 10.0.0.1
    ssh_port: 2444
    role: worker
  - <<: *host_defaults
    address: 10.0.0.2
    user: root
    role: worker

network:
  provider: weave

addons:
  ingress-nginx:
    enabled: true

SSH user@host, bastion + defaults

$ pharos init -m vagrant@192.168.100.100 -w vagrant@10.0.0.1:2444 -w root@10.0.0.2 -b bastion@127.0.0.1:224 --defaults; cat cluster.yml

-->

---
name: black-snow-4463
hosts:
- ssh_key_path: "~/.ssh/id_rsa"
  bastion:
    address: 127.0.0.1
    user: bastion
    ssh_port: 224
  user: vagrant
  address: 192.168.100.100
  ssh_port:
  role: master
- ssh_key_path: "~/.ssh/id_rsa"
  bastion:
    address: 127.0.0.1
    user: bastion
    ssh_port: 224
  user: vagrant
  address: 10.0.0.1
  ssh_port: 2444
  role: worker
- ssh_key_path: "~/.ssh/id_rsa"
  bastion:
    address: 127.0.0.1
    user: bastion
    ssh_port: 224
  user: vagrant
  address: 10.0.0.2
  ssh_port:
  role: worker
network:
  provider: weave
  service_cidr: 10.96.0.0/12
  pod_network_cidr: 10.32.0.0/12
  node_local_dns_cache: true
  firewalld:
    enabled: false
    open_ports:
    - port: '22'
      protocol: tcp
      roles:
      - "*"
    - port: '80'
      protocol: tcp
      roles:
      - worker
    - port: '443'
      protocol: tcp
      roles:
      - worker
    - port: '6443'
      protocol: tcp
      roles:
      - master
    - port: 30000-32767
      protocol: tcp
      roles:
      - "*"
    - port: 30000-32767
      protocol: udp
      roles:
      - "*"
  weave:
    no_masq_local: false
  calico:
    ipip_mode: Always
    nat_outgoing: true
    environment: {}
    mtu: 1500
  custom: {}