Class: Service

Inherits:
ActiveRecord::Base
  • Object
show all
Includes:
MKIt::DockerHelper, MKIt::ERBHelper
Defined in:
lib/mkit/app/model/service.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods included from MKIt::DockerHelper

#attach_network, #create_instance, #create_network, #create_volume, #delete_volume, #dettach_network, #execute_local, #inspect_instance, #inspect_volume, #network_exists?, #remove_instance, #remove_network, #start_instance, #stop_instance

Methods included from MKIt::ERBHelper

#parse_model, #parse_template, #read_template

Class Method Details

.create(yaml) ⇒ Object

Raises:



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# File 'lib/mkit/app/model/service.rb', line 33

def self.create(yaml)
  config = yaml["service"]
  raise MKIt::ServiceAlreadyExists.new unless Service.find_by_name(config.name).nil?

  srv = Service.new(
    name: config.name,
    version: 1,
    image: config.image,
    command: config.command,
    status: MKIt::Status::CREATING
  )

  # reserve pool ip
  srv.lease = Pool.find_by_name(MKIt::Utils.me).reserve_for(srv)

  srv.dns_host = DnsHost.new(
    service: srv,
    name: srv.name,
    ip: srv.lease.ip
  )

  # create service network
  srv.deploy_network

  # configure
  srv.configure(config)
  #
  srv.status = MKIt::Status::CREATED
  srv.save
  data = { service_id: srv.id, version: srv.version }
  # create pod
  (1..srv.min_replicas).each { |i|
    MkitJob.publish(topic: :create_pod_saga, service_id: srv.id, data: data)
  }
  srv
end

Instance Method Details

#add_service_config(key, value) ⇒ Object 



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# File 'lib/mkit/app/model/service.rb', line 145

def add_service_config(key, value)
  v = ServiceConfig.create(service: self, key: key, value: value)
  self.service_config << v
  v
end

#add_volume(volume_config) ⇒ Object 



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# File 'lib/mkit/app/model/service.rb', line 139

def add_volume(volume_config)
  v = Volume.create(self, volume_config)
  self.volume << v
  v
end

#as_json(options = {}) ⇒ Object 



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# File 'lib/mkit/app/model/service.rb', line 236

def as_json(options = {})
  srv = super
  a=[:pod, :volume, :service_config, :service_port]
  a.each { | k | 
    srv[k] ||= []
    self.send(k).each { |v| 
      srv[k] << v.as_json
    }
  }
  srv
end

#clean_up ⇒ Object 



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# File 'lib/mkit/app/model/service.rb', line 215

def clean_up
  my_addr = self.lease.ip.split('.')[3]
  filename = "#{'%04i' % my_addr.to_i}_#{self.name}.cfg"
  MkitJob.publish(topic: :destroy_proxy_config, data: {filename: filename})
end

#configure(config) ⇒ Object 



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# File 'lib/mkit/app/model/service.rb', line 70

def configure(config)
  self.image = config.image if config.image != self.image
  self.command = config.command if config.command != self.command

  unless config.resources.nil?
    self.max_replicas = config.resources.max_replicas unless config.resources.max_replicas.nil? || config.resources.max_replicas < 1
    self.min_replicas = config.resources.min_replicas unless config.resources.min_replicas.nil? || config.resources.min_replicas < 1
  else
    self.min_replicas = 1
    self.max_replicas = 1
  end
  self.max_replicas = self.min_replicas if self.min_replicas > self.max_replicas

  # docker network
  if config.network.nil? || config.network.empty?
    self.pods_network="mkit"
  else
    self.pods_network=config.network
  end
  self.create_pods_network

  # haproxy ports
  self.service_port = []
  config.ports&.each do |p|
    port = ServicePort.create(service: self, config: p)
    self.service_port << port
  end

  # volumes
  self.volume = []
  config.volumes&.each { |volume|
    self.add_volume(volume)
  }
  # environment
  self.service_config=[]
  config.environment&.each_pair { |key,value|
    self.add_service_config(key, value)
  }
  self.volume.each { | volume |
    volume.deploy
  }
end

#create_pods_network ⇒ Object 



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# File 'lib/mkit/app/model/service.rb', line 129

def create_pods_network
  create_network(self.pods_network) if !network_exists?(self.pods_network)
end

#current_configs ⇒ Object 



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# File 'lib/mkit/app/model/service.rb', line 151

def current_configs
  self.service_config&.select{ |x| x.ctype == MKIt::CType::ENVIRONMENT.to_s && x.version == self.version}
end

#current_ports ⇒ Object 



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# File 'lib/mkit/app/model/service.rb', line 155

def current_ports
  self.service_port&.select{ |x| x.version == self.version}
end

#deploy_network ⇒ Object 



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# File 'lib/mkit/app/model/service.rb', line 133

def deploy_network
  # create service interface...
  self.lease.confirm
  self.lease.up
end

#my_dns ⇒ Object 



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# File 'lib/mkit/app/model/service.rb', line 159

def my_dns
  MKIt::Interface.ip
end

#parse ⇒ Object 



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# File 'lib/mkit/app/model/service.rb', line 211

def parse
  parse_model(MKIt::Templates::HAPROXY).result(binding)
end

#proxy_config ⇒ Object 



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# File 'lib/mkit/app/model/service.rb', line 202

def proxy_config
  # config
  haproxy = parse
  my_addr = self.lease.ip.split('.')[3]
  filename = "#{'%04i' % my_addr.to_i}_#{self.name}.cfg"
  MKItLogger.debug("haproxy config file: #{filename}")
  {filename: filename, data: haproxy}
end

#start ⇒ Object

ctrl



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# File 'lib/mkit/app/model/service.rb', line 224

def start
  self.pod.each { |p|
    MkitJob.publish(topic: :start_pod, service_id: self.id, pod_id: p.id)
  }
end

#stop ⇒ Object 



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# File 'lib/mkit/app/model/service.rb', line 230

def stop
  self.pod.each { |p|
    MkitJob.publish(topic: :stop_pod, service_id: self.id, pod_id: p.id)
  }
end

#update!(yaml) ⇒ Object

Raises:



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# File 'lib/mkit/app/model/service.rb', line 113

def update!(yaml)
  config = yaml["service"]
  raise MKIt::ServiceNameMismatch.new unless config.name == self.name
  self.version+=1
  self.configure(config)

  # start new pod, destroy old pod...
  self.pod.each { |pod| MkitJob.publish(topic: :destroy_pod, pod_id: pod.id, data: {}) }
  # create pod
  data = { service_id: self.id, version: self.version }
  (1..self.min_replicas).each { |i|
    MkitJob.publish(topic: :create_pod_saga, service_id: self.id, data: data)
  }
  self.save
end

#update_proxy ⇒ Object

ha proxy configs & template



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# File 'lib/mkit/app/model/service.rb', line 198

def update_proxy
  MkitJob.publish(topic: :update_proxy_config, application_id: self.id, data: proxy_config)
end

#update_status! ⇒ Object 



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# File 'lib/mkit/app/model/service.rb', line 163

def update_status!
  combined_status = nil
  self.pod.each { |pod|
    child_status = pod.set_status_from_docker
    if combined_status
      case combined_status
      when MKIt::Status::RUNNING
        case child_status
        when MKIt::Status::STOPPED || MKIt::Status::PENDING
          combined_status = MKIt::Status::DEGRATED
        end
      when MKIt::Status::STOPPED
        case child_status
        when MKIt::Status::RUNNING || MKIt::Status::PENDING
          combined_status = MKIt::Status::DEGRATED
        end
      when MKIt::Status::PENDING
        case child_status
        when MKIt::Status::RUNNING || MKIt::Status::STOPPED
          combined_status = MKIt::Status::DEGRATED
        end
      end
    else
      combined_status = child_status
    end
  }
  combined_status = MKIt::Status::CREATING unless combined_status
  self.status = combined_status
  self.save
  self.status
end