Class: OrenoLxdapi::Client

Inherits:
Object
  • Object
show all
Defined in:
lib/oreno_lxdapi.rb

Overview

Helper Class to talk to LXD daemon

Instance Method Summary collapse

Constructor Details

#initialize(uri, image_name, container_name) ⇒ Client

Returns a new instance of Client.



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# File 'lib/oreno_lxdapi.rb', line 13

def initialize(uri, image_name, container_name)
  @log = Logger.new(STDOUT)
  @uri = uri
  @image_name = image_name
  @container_name = container_name
end

Instance Method Details

#check_container_status ⇒ Object 



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# File 'lib/oreno_lxdapi.rb', line 79

def check_container_status
  req = Net::HTTP::Get.new("/1.0/containers/#{@container_name}/state")
  resp = client.request(req)
  json = JSON.parse(resp.body)

  status = ''
  ipv4 = ''
  status = json['metadata']['status'] if json['metadata']
  return status if json['metadata']['ips'].nil
  json['metadata']['ips'].each\
    { |ip| ipv4 = ip['address'] if ip['interface'] == 'eth0' }
end

#client ⇒ Object 



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# File 'lib/oreno_lxdapi.rb', line 20

def client
  NetX::HTTPUnix.new(@uri)
end

#config_container(opts = {}) ⇒ Object 



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# File 'lib/oreno_lxdapi.rb', line 30

def config_container(opts = {}) end

#create_container(opts = {}) ⇒ Object 



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# File 'lib/oreno_lxdapi.rb', line 32

def create_container(opts = {})
  options = {
    architecture: 2,
    profiles: ['default'],
    ephemeral: true,
    limits_cpu: '1'
  }

  options.merge!(opts)

  req = Net::HTTP::Post.new('/1.0/containers')
  req['Content-Type'] = 'application/json'
  payload = {
    'name' => @container_name,
    'architecture' => options[:architecture].to_i,
    'profiles' =>  options[:profiles],
    'ephemeral' => options[:ephemeral],
    'config' => {
      'limits.cpu' => options[:limits_cpu]
    },
    'source' => {
      'type' => 'image',
      'alias' => @image_name
    }
  }
  req.body = payload.to_json

  resp = client.request(req)
  resp.body
end

#create_exec(command) ⇒ Object 



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# File 'lib/oreno_lxdapi.rb', line 144

def create_exec(command)
  #  commands = command.split(" ")
  #  req = Net::HTTP::Post.new("/1.0/containers/#{@container_name}/exec")
  #  req["Content-Type"] = "application/json"
  #  payload = {
  #    "command" =>  commands,
  #    "environment" => {
  #      "HOME" => "/root",
  #      "TERM" => "screen",
  #      "USER" => "root",
  #    },
  #    "wait-for-websocket" => true,
  #    "interactive" => true,
  #  }
  #  req.body = payload.to_json
  #
  #  resp = client.request(req)
  #  json = JSON.parse(resp.body)

  #  operation_id = ""
  #  secret = ""

  #  if json['metadata']
  #    operation_id = json['metadata']['id']
  #    unless json['metadata']['metadata'] == nil
  #      secret = json['metadata']['metadata']['fds']['0']
  #      return operation_id, secret
  #    else
  #      return operation_id
  #    end
  #  end
end

#delete_container ⇒ Object 



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# File 'lib/oreno_lxdapi.rb', line 63

def delete_container
  @log.info('Deleting Container...')
  req = Net::HTTP::Delete.new("/1.0/containers/#{@container_name}")
  resp = client.request(req)
  resp.body
end

#describe_container ⇒ Object 



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# File 'lib/oreno_lxdapi.rb', line 70

def describe_container
  req = Net::HTTP::Get.new("/1.0/containers/#{@container_name}")
  resp = client.request(req)
  json = JSON.parse(resp.body)

  return json['metadata'] if json['metadata']
  @log.warn('Failed to get metadata.')
end

#file_upload(src, dst) ⇒ Object 



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# File 'lib/oreno_lxdapi.rb', line 126

def file_upload(src, dst)
  req = Net::HTTP::Post.new("/1.0/containers/#{@container_name}"\
                            "/files?path=#{dst}")
  req['X-LXD-uid'] = '0'
  req['X-LXD-gid'] = '0'
  req['X-LXD-mode'] = '700'
  req['Content-Type'] = 'multipart/form-data'

  resp = ''
  File.open(src, 'rb') do |f|
    req.body_stream = f
    req['Content-Length'] = f.size
    resp = client.request(req)
  end

  resp.body
end

#list_containers ⇒ Object 



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# File 'lib/oreno_lxdapi.rb', line 24

def list_containers
  req = Net::HTTP::Get.new('/1.0/containers')
  resp = client.request(req)
  resp.body
end

#run_exec(operation_id, secret) ⇒ Object 



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# File 'lib/oreno_lxdapi.rb', line 177

def run_exec(operation_id, secret)
  # run_lxc_exec
end

#run_lxc_exec(command) ⇒ Object 



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# File 'lib/oreno_lxdapi.rb', line 181

def run_lxc_exec(command)
  lxc_exec = "lxc exec #{@container_name} -- "
  run_command = lxc_exec + command
  status = system(run_command)
  status
end

#state_container(action, opts = {}) ⇒ Object 



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# File 'lib/oreno_lxdapi.rb', line 92

def state_container(action, opts = {})
  options = {
    timeout: 30,
    force: true
  }

  options.merge!(opts)

  req = Net::HTTP::Put.new("/1.0/containers/#{@container_name}/state")
  req['Content-Type'] = 'application/json'
  payload = {
    'action' => action,
    'timeout' => options[:timeout],
    'force' => options[:force]
  }
  req.body = payload.to_json
  resp = client.request(req)

  if action == 'start'
    loop do
      @log.info('Starting Container...')
      status = check_container_status
      break if status.length == 2 && status[1] != ''
      sleep 3
    end
    return resp.body
  elsif action == 'stop'
    @log.info('Stopping Container...')
    return resp.body
  else
    @log.warn('Invalid argument.')
  end
end