Class: Kuby::Plugins::RailsApp::Postgres

Inherits:
Kuby::Plugin show all
Defined in:
lib/kuby/plugins/rails_app/postgres.rb

Constant Summary collapse

ROLE = 
'web'.freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Kuby::Plugin

#after_deploy, #after_setup, #before_deploy, #before_setup, #configure, #docker_images, #setup

Constructor Details

#initialize(environment, configs) ⇒ Postgres

Returns a new instance of Postgres.



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# File 'lib/kuby/plugins/rails_app/postgres.rb', line 14

def initialize(environment, configs)
  @environment = environment
  @configs = configs

  user(config['username'])
  password(config['password'])
end

Instance Attribute Details

#configs ⇒ Object (readonly)

Returns the value of attribute configs.



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# File 'lib/kuby/plugins/rails_app/postgres.rb', line 12

def configs
  @configs
end

#environment ⇒ Object (readonly)

Returns the value of attribute environment.



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# File 'lib/kuby/plugins/rails_app/postgres.rb', line 12

def environment
  @environment
end

Instance Method Details

#after_configuration ⇒ Object 



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# File 'lib/kuby/plugins/rails_app/postgres.rb', line 34

def after_configuration
  environment.docker.package_phase.add(:postgres_dev)
  environment.docker.package_phase.add(:postgres_client)
end

#base_name ⇒ Object 



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# File 'lib/kuby/plugins/rails_app/postgres.rb', line 137

def base_name
  @base_name ||= "#{kubernetes.selector_app}-#{ROLE}"
end

#database(&block) ⇒ Object 



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# File 'lib/kuby/plugins/rails_app/postgres.rb', line 97

def database(&block)
  context = self

  @database ||= Kuby::KubeDB.postgres do
    api_version 'kubedb.com/v1alpha1'

    metadata do
      name "#{context.base_name}-postgres"
      namespace context.kubernetes.namespace.metadata.name
    end

    spec do
      database_secret do
        secret_name context.secret.metadata.name
      end

      version '11.2'
      standby_mode 'Hot'
      streaming_mode 'asynchronous'
      storage_type 'Durable'

      storage do
        storage_class_name context.kubernetes.provider.storage_class_name
        access_modes ['ReadWriteOnce']

        resources do
          requests do
            add :storage, '10Gi'
          end
        end
      end

      termination_policy 'DoNotTerminate'
    end
  end

  @database.instance_eval(&block) if block
  @database
end

#host ⇒ Object 



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# File 'lib/kuby/plugins/rails_app/postgres.rb', line 39

def host
  # host is the same as the name thanks to k8s DNS
  @host ||= database.metadata.name
end

#kubernetes ⇒ Object 



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# File 'lib/kuby/plugins/rails_app/postgres.rb', line 141

def kubernetes
  environment.kubernetes
end

#name ⇒ Object 



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# File 'lib/kuby/plugins/rails_app/postgres.rb', line 26

def name
  :postgres
end

#password(password) ⇒ Object 



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# File 'lib/kuby/plugins/rails_app/postgres.rb', line 59

def password(password)
  secret do
    data do
      set :POSTGRES_PASSWORD, password
    end
  end
end

#requires_credentials? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/kuby/plugins/rails_app/postgres.rb', line 22

def requires_credentials?
  true
end

#resources ⇒ Object 



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# File 'lib/kuby/plugins/rails_app/postgres.rb', line 30

def resources
  @resources ||= [secret, database]
end

#rewritten_configs ⇒ Object 



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# File 'lib/kuby/plugins/rails_app/postgres.rb', line 44

def rewritten_configs
  # deep dup
  @rewritten_configs ||= Marshal.load(Marshal.dump(configs)).tap do |new_configs|
    new_configs[environment.name]['host'] = host
  end
end

#secret(&block) ⇒ Object 



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# File 'lib/kuby/plugins/rails_app/postgres.rb', line 81

def secret(&block)
  context = self

  @secret ||= KubeDSL.secret do
    metadata do
      name "#{context.base_name}-postgres-secret"
      namespace context.kubernetes.namespace.metadata.name
    end

    type 'Opaque'
  end

  @secret.instance_eval(&block) if block
  @secret
end

#storage(amount) ⇒ Object 



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# File 'lib/kuby/plugins/rails_app/postgres.rb', line 67

def storage(amount)
  database do
    spec do
      storage do
        resources do
          requests do
            set :storage, amount
          end
        end
      end
    end
  end
end

#user(user) ⇒ Object 



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# File 'lib/kuby/plugins/rails_app/postgres.rb', line 51

def user(user)
  secret do
    data do
      set :POSTGRES_USER, user
    end
  end
end