Class: NCC::Connection

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

Direct Known Subclasses

AWS, OpenStack

Defined Under Namespace

Classes: AWS, OpenStack

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(ncc, cloud, opt = {}) ⇒ Connection

Returns a new instance of Connection.



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# File 'lib/ncc/connection.rb', line 46

def initialize(ncc, cloud, opt={})
    @ncc = ncc
    @cache = { }
    @cfg = ncc.config
    @cfg_mtime = @cfg[:clouds][cloud].mtime
    @cloud = cloud
    @logger = opt[:logger] if opt.has_key? :logger
    @cache_timeout = opt[:cache_timeout] || 600
    @auth_retry_limit = opt[:auth_retry_limit] || 1
    @create_timeout = opt[:create_timeout] || 160
    do_connect
end

Instance Attribute Details

#fog ⇒ Object (readonly)

Returns the value of attribute fog.



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# File 'lib/ncc/connection.rb', line 31

def fog
  @fog
end

Class Method Details

.connect(ncc, cloud = :default, opt = {}) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 33

def self.connect(ncc, cloud=:default, opt={})
    cfg = ncc.config
    provider = cfg[:clouds][cloud]['provider']
    case provider
    when 'aws'
        require 'ncc/connection/aws'
        NCC::Connection::AWS.new(ncc, cloud, opt)
    when 'openstack'
        require 'ncc/connection/openstack'
        NCC::Connection::OpenStack.new(ncc, cloud, opt)
    end
end

Instance Method Details

#collection(type, key = nil) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 299

def collection(type, key=nil)
    maybe_invalidate type
    @cache[type] ||= {
        :timestamp => Time.now,
        :data => Hash[get_provider_objects(type).map { |o| [o.id, o] }]
    }
    if key.nil?
        @cache[type][:data].values
    else
        @cache[type][:data][key]
    end
end

#communication_error(message) ⇒ Object

Raises:



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# File 'lib/ncc/connection.rb', line 566

def communication_error(message)
    message = "Error communicating with #{provider} cloud #{@cloud}: " + message unless
        /Error .*communicating with/.match(message)
    raise NCC::Error::Cloud, message
end

#connection_params ⇒ Object 



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# File 'lib/ncc/connection.rb', line 104

def connection_params
    []
end

#console(instance_id) ⇒ Object

Raises:



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# File 'lib/ncc/connection.rb', line 595

def console(instance_id)
    raise NCC::Error::NotFound, "Cloud #{@cloud} provider " +
        "#{provider} does not support interactive console"
end

#console_log(instance_id) ⇒ Object

Raises:



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# File 'lib/ncc/connection.rb', line 590

def console_log(instance_id)
    raise NCC::Error::NotFound, "Cloud #{@cloud} provider " +
        "#{provider} does not support console logs"
end

#create_instance(instance_spec, wait_for_ip = nil) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 498

def create_instance(instance_spec, wait_for_ip=nil)
    wait_for_ip ||= @create_timeout

    if ! instance_spec.kind_of? NCC::Instance
        instance_spec = NCC::Instance.new(@cfg, instance_spec)
    end
    req_id = ['ncc',
        @cloud,
        UUIDTools::UUID.random_create.to_s].join('-')
    begin
        info "#{@cloud} requesting name from inventory using #{req_id}"
        fqdn = @ncc.inventory.get_or_assign_system_name(req_id)['fqdn']
    rescue StandardError => e
        raise NCC::Error::Cloud, "Error [#{e.class}] " +
            "communicating with inventory to " +
            "assign name using (ncc_req_id=#{req_id}): #{e.message}"
    end
    instance_spec.name = fqdn
    begin
        req = provider_request(instance_spec)
        t0 = Time.now
        info "#{@cloud} sending request: #{req.inspect}"
        server = do_fog { |fog| fog.servers.create(req) }
        # The reason we wait for an IP is so we can add it to
        # inventory, which then calculates the datacenter
        if wait_for_ip > 0 and instance_ip_address(server).nil?
            info "#{@cloud} waiting for ip on #{server.id}"
            this = self
            server.wait_for(wait_for_ip) { ready? and this.instance_ip_address(server)  }
        end
    rescue StandardError => err
        debug "Error [#{err.class}]: #{err.message} #{err.backtrace.join("\n   ")}"
        inv_update = { 'fqdn' => fqdn, 'status' => 'decommissioned' }
        if ! server.nil? and server.id
            inv_update['uuid'] = server.id
            inv_update['serial_number'] = server.id
        end
        @ncc.inventory.update('system', inv_update, fqdn)
        server_id = (server.nil? ? 'nil' : server.id)
        communication_error "[#{err.class}] (ncc_req_id=#{req_id} " +
            "instance_id=#{server_id}): #{err.message}"
    end
    elapsed = Time.now - t0
    info "Created instance instance_id=#{server.id} at #{provider} cloud #{@cloud} in #{elapsed}s"
    instance = instance_for server
    instance_spec.id = instance.id
    instance_spec.ip_address = instance.ip_address
    instance_spec.host = instance.host
    inv_req = inventory_request(instance_spec)
    inv_req['cloud'] = @cloud
    inv_req['status'] = 'building'
    begin
        info "#{@cloud} updating inventory #{fqdn}/#{req_id} -> #{inv_req.inspect}"
        @ncc.inventory.update('system', inv_req, fqdn)
    rescue StandardError => e
        raise NCC::Error::Cloud, "Error [#{e.class}] updating inventory " +
            "system #{fqdn} " +
            "(cloud=#{@cloud} ncc_req_id=#{req_id} " +
            "instance_id=#{server.id}): " + e.message
    end
    instance
end

#current? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ncc/connection.rb', line 59

def current?
    provider == @cfg[:clouds][@cloud]['provider'] and
        @cfg_mtime == @cfg[:clouds][@cloud].mtime
end

#debug(msg = nil) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 85

def debug(msg=nil)
    msg ||= yield if block_given?
    if @logger and @logger.respond_to? :debug
        @logger.debug "#{self} #{msg}"
    end
end

#delete(instance_id) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 572

def delete(instance_id)
    server = do_fog { |fog| fog.servers.get(instance_id) }
    if server.nil?
        instance_not_found instance_id
    else
        begin
            instance = instance_for server
            server.destroy
            inv_update = { 'fqdn' => instance.name,
                'status' => 'decommissioned' }
            @ncc.inventory.update('system', inv_update, instance.name)
        rescue StandardError => e
            communication_error "deleting fqdn=#{instance.name} " +
                "instance_id=#{server.id}: #{e.message}"
        end
    end
end

#do_connect ⇒ Object 



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# File 'lib/ncc/connection.rb', line 108

def do_connect
    cloud_config = @cfg[:clouds][@cloud]
    pnames = connection_params + ['provider']
    params = Hash[cloud_config.to_hash(*pnames).map do |k, v|
                      [k.intern, v]
                  end ]
    @fog = Fog::Compute.new(params)
end

#do_fog ⇒ Object 



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# File 'lib/ncc/connection.rb', line 117

def do_fog
    remaining_tries = @auth_retry_limit
    begin
        unless @fog
            debug "do_fog: connecting because @fog is nil (@auth_retry_limit=#{@auth_retry_limit})"
            do_connect
        end
        debug "do_fog: beginning fog operation"
        yield @fog
    rescue Excon::Errors::Unauthorized => err
        # might be an expired auth token, retry
        if remaining_tries > 0
            do_connect
            remaining_tries -= 1
            retry
        else
            @fog = nil
            raise NCC::Error::Cloud, "Error communicating with #{provider} " +
                "cloud #{@cloud} (#{e.class}): #{e.message}"
        end
    rescue NCC::Error::Cloud => err
        @fog = nil
        raise err
    rescue NCC::Error => err
        raise err
    rescue StandardError => err
        debug "Unknown error [#{err.class}]: #{err.message} #{err.backtrace.join("\n   ")}"
        @fog = nil
        raise NCC::Error::Cloud, "Error communicating with #{provider} " +
            "cloud #{@cloud} [#{err.class}]: #{err.message}"
    end
end

#fields(obj, *flist) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 156

def fields(obj, *flist)
    Hash[flist.map { |f| [f, obj.send(f)] }]
end

#generic_provider_request(instance) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 454

def generic_provider_request(instance)
    {
        :name => instance.name,
        :flavor => map_to_provider_id(:size, instance.size),
        :size => map_to_provider_id(:image, instance.image),
    }.merge(instance.extra provider)
end

#generic_translate(abstract_object_type, provider_object) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 380

def generic_translate(abstract_object_type, provider_object)
    abstract_object =  {
        'id' => id_of(abstract_object_type, provider_object),
        'provider_id' => provider_object.id
    }
    [:name, :description].each do |field|
        abstract_object[field.to_s] = provider_object.send(field) if
            provider_object.respond_to? field
    end
    abstract_object
end

#get_provider_object(provider_object_spec) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 328

def get_provider_object(provider_object_spec)
    abstract_object_type, abstract_object_id = provider_object_spec.first
    if id_field(abstract_object_type) != :id
        collection(abstract_object_type).find do |provider_object|
            id_of(abstract_object_type, provider_object) ==
                abstract_object_id
        end
    else
        provider_object_id = map_to_provider_id(abstract_object_type,
                                             abstract_object_id)
        collection(abstract_object_type, provider_object_id)
    end
end

#get_provider_objects(type) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 312

def get_provider_objects(type)
    enum = case type
           when :size
               :flavors
           when :image
               :images
           end
    if use_only_mapped(type) and id_field(type) == :id
        id_map(type).values.map do |id|
            do_fog { |fog| fog.send(enum).get(id) }
        end
    else
        do_fog { |fog| fog.send(enum).map { |e| e } }
    end
end

#host_fqdn(host) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 486

def host_fqdn(host)
    if @cfg[:clouds][@cloud].has_key? 'host_domain'
        host + '.' + @cfg[:clouds][@cloud]['host_domain']
    else
        host
    end
end

#id_field(abstract_object_type) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 274

def id_field(abstract_object_type)
    methodname = abstract_object_type.to_s + '_id_field'
    if self.respond_to? methodname
        self.send methodname
    else
        :id
    end
end

#id_map(type) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 196

def id_map(type)
    debug "making id_map for #{type.inspect}"
    keyname = keyname_for(type)
    r = { }
    debug "keyname = #{keyname} (for #{type.inspect})"
    debug "provider map: #{@cfg[:providers][provider].to_hash.inspect}"
    r.update(id_map_hash(@cfg[:providers][provider][keyname].to_hash)) if
        @cfg[:providers][provider].has_key? keyname
    #debug "cloud map: #{@cfg[:clouds][@cloud][keyname].to_hash}"
    r.update(id_map_hash(@cfg[:clouds][@cloud][keyname].to_hash)) if
        @cfg[:clouds][@cloud].has_key? keyname
    debug "  >> #{r.inspect}"
    r
end

#id_map_hash(h) ⇒ Object

Something like “images” => { “$abstract_id” => x } can have an x where it’s the provider id, or an x which is a hash. If the hash has an id key, than that is used as a mapped id, if it doesn’t, it’s ignored (for the purposes of id mapping) -jbrinkley/20130410



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# File 'lib/ncc/connection.rb', line 182

def id_map_hash(h)
    Hash[
    h.map do |k, v|
             if v.respond_to? :has_key?
                 if v.has_key? 'id'
                     [k, v['id']]
                 end
             else
                 [k, v]
             end
         end.reject { |p| p.nil? }
                       ]
end

#id_of(abstract_object_type, obj) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 283

def id_of(abstract_object_type, obj)
    map_to_id(abstract_object_type,
           translated_id_of(abstract_object_type, obj))
end

#ids(a) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 160

def ids(a)
    Hash[a.map { |e| [e['id'], e] }]
end

#images(image_id = nil) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 263

def images(image_id=nil)
    if image_id.nil?
        collection(:image).find_all do |provider_image|
                @cfg[:images].has_key? id_of(:image, provider_image)
            end.map { |i| object_of(:image, i) }
    else
        object_of(:image,
               get_provider_object(:image => image_id))
    end
end

#info(msg) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 98

def info(msg)
    if @logger and @logger.respond_to? :info
        @logger.info "#{self} #{msg}"
    end
end

#instance_for(server) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 392

def instance_for(server)
    instance = NCC::Instance.new(@cfg, :logger => @logger)
    instance.set_without_validation(:id => server.id)
    instance.set_without_validation(:name => instance_name(server))
    instance.set_without_validation(:size => instance_size(server))
    instance.set_without_validation(:image => instance_image(server))
    instance.set_without_validation(:ip_address =>
                         instance_ip_address(server))
    instance.set_without_validation(:host => instance_host(server))
    instance.set_without_validation(:status => instance_status(server))
    instance
end

#instance_host(server) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 421

def instance_host(server)
    nil
end

#instance_image(server) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 413

def instance_image(server)
    map_to_id(:image, server.image)
end

#instance_ip_address(server) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 425

def instance_ip_address(server)
    server.ip_address.to_s
end

#instance_name(server) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 405

def instance_name(server)
    server.name
end

#instance_not_found(instance_id) ⇒ Object

Raises:



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# File 'lib/ncc/connection.rb', line 561

def instance_not_found(instance_id)
    raise NCC::Error::NotFound, "Instance #{instance_id.inspect} not " +
        "found in #{provider} cloud #{@cloud}"
end

#instance_size(server) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 409

def instance_size(server)
    map_to_id(:size, server.size)
end

#instance_status(server) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 417

def instance_status(server)
    map_to_status(server.status)
end

#instances(instance_id = nil) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 429

def instances(instance_id=nil)
    debug "instances(#{instance_id.inspect})"
    if instance_id.nil?
        do_fog { |fog| fog.servers.map { |server| instance_for server } }
    else
        server = do_fog { |fog| fog.servers.get instance_id }
        if server.nil?
            instance_not_found instance_id
        end
        instance_for server
    end
end

#inventory_request(instance) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 470

def inventory_request(instance)
    i = instance.with_defaults(@cfg[:clouds][@cloud]['defaults'],
                      @cfg[:providers][provider]['defaults'])
    {
        'fqdn' => i.name,
        'size' => i.size,
        'image' => i.image,
        'serial_number' => i.id,
        'uuid' => i.id,
        'roles' => i.role.sort.join(','),
        'ipaddress' => i.ip_address,
        'host_fqdn' => host_fqdn(i.host),
        'environment_name' => i.environment
    }.merge(instance.extra 'inventory')
end

#keyintern(h) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 462

def keyintern(h)
    Hash[h.map do |k, v|
             [k.to_sym,
                 ((v.is_a? Hash and (k.to_sym != :tags)) ?
                     keyintern(v) : v)]
         end]
end

#keyname_for(type) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 168

def keyname_for(type)
    case type
    when :size
        'sizes'
    when :image
        'images'
    end
end

#map_from_raw_provider_id(type, raw_provider_id) ⇒ Object

raw meaning not using “our” notion of id_field



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# File 'lib/ncc/connection.rb', line 235

def map_from_raw_provider_id(type, raw_provider_id)
    # Using collection here for cache
    provider_object = collection(type).find do |item|
        item.id == raw_provider_id
    end
    id_of(type, provider_object)
end

#map_to_id(type, provider_id) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 225

def map_to_id(type, provider_id)
    debug "provider_id_map = #{provider_id_map(type).inspect}"
    provider_id_map(type)[provider_id] || provider_id
end

#map_to_provider_id(type, abstract_id) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 230

def map_to_provider_id(type, abstract_id)
    id_map(type)[abstract_id] || abstract_id
end

#map_to_provider_status(abstract_status) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 247

def map_to_provider_status(abstract_status)
    abstract_status
end

#map_to_status(provider_status) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 243

def map_to_status(provider_status)
    provider_status
end

#maybe_invalidate(type) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 64

def maybe_invalidate(type)
    if @cache.has_key? type
        @cache.delete(type) if
            (Time.now - @cache[type][:timestamp]) > @cache_timeout
    end
end

#me ⇒ Object 



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# File 'lib/ncc/connection.rb', line 71

def me
    [self.class, provider, @cloud].join(' ')
end

#merge_configured(abstract_object, data) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 352

def merge_configured(abstract_object, data)
    if data.respond_to? :each_pair
        data.each_pair { |k, v| abstract_object[k] ||= v }
    else
        abstract_object['provider_id'] ||= data
    end
end

#modify_instance_request(instance) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 494

def modify_instance_request(instance)
    instance
end

#notice(msg) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 92

def notice(msg)
    if @logger and @logger.respond_to? :notice
        @logger.notice "#{self} #{msg}"
    end
end

#object_of(abstract_object_type, provider_object) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 360

def object_of(abstract_object_type, provider_object)
    debug "object_of(#{abstract_object_type.inspect}, #{provider_object})"
    abstract_object = translate(abstract_object_type, provider_object)
    keyname = keyname_for abstract_object_type
    id = abstract_object['id']
    [@cfg[:clouds][@cloud], @cfg[:providers][provider]].each do |cfg|
        if cfg.has_key? keyname and cfg[keyname].has_key? id
            debug "merging cloud/provider data: cfg[#{keyname}][#{id}]"
            merge_configured(abstract_object, cfg[keyname][id])
        end
    end
    if @cfg.has_key? keyname.intern and @cfg[keyname.intern].has_key? id
        debug "merging abstract data: " +
            "@cfg[#{keyname.intern.inspect}][#{id}]"
        merge_configured(abstract_object, @cfg[keyname.intern][id].to_hash)
    end
    debug "object_of returns: #{abstract_object.inspect}"
    abstract_object
end

#provider ⇒ Object 



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# File 'lib/ncc/connection.rb', line 164

def provider
    generic
end

#provider_id_map(type) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 211

def provider_id_map(type)
    debug "making provider_id_map for #{type.inspect}"
    keyname = keyname_for(type)
    r = { }
    r.update(id_map_hash(@cfg[:providers][provider][keyname].
                         to_hash).invert) if
        @cfg[:providers][provider].has_key? keyname
    r.update(id_map_hash(@cfg[:clouds][@cloud][keyname].
                         to_hash).invert) if
        @cfg[:clouds][@cloud].has_key? keyname
    debug "  >>> #{r.inspect}"
    r
end

#provider_request(instance) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 442

def provider_request(instance)
    keyintern(
    provider_request_of(instance.
                     with_defaults(@cfg[:clouds][@cloud]['defaults'],
                          @cfg[:providers][provider]['defaults']))
    )
end

#provider_request_of(instance) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 450

def provider_request_of(instance)
    generic_provider_request(instance)
end

#reboot(instance_id) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 600

def reboot(instance_id)
    server = do_fog { |fog| fog.servers.get(instance_id) }
    if server.nil?
        instance_not_found instance_id
    else
        server.reboot
    end
end

#sizes(size_id = nil) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 251

def sizes(size_id=nil)
    debug "sizes(#{size_id.inspect})"
    if size_id.nil?
        collection(:size).find_all do |flavor|
                @cfg[:sizes].has_key? id_of(:size, flavor)
            end.map { |f| object_of(:size, f) }
    else
        object_of(:size,
               get_provider_object(:size => size_id))
    end
end

#to_s ⇒ Object 



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# File 'lib/ncc/connection.rb', line 75

def to_s
    '#<' + me + '>'
end

#translate(abstract_object_type, provider_object) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 342

def translate(abstract_object_type, provider_object)
    debug "translate(#{abstract_object_type.inspect}, #{provider_object})"
    methodname = 'translate_' + abstract_object_type.to_s
    if self.respond_to? methodname
        self.send(methodname, provider_object)
    else
        generic_translate(abstract_object_type, provider_object)
    end
end

#translated_id_of(abstract_object_type, obj) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 288

def translated_id_of(abstract_object_type, obj)
    id_fielder = id_field abstract_object_type
    if id_fielder.kind_of? Proc
        id_fielder.call obj
    elsif obj.nil?
        nil
    else
        obj.send id_fielder
    end
end

#use_only_mapped(type) ⇒ Object

Warning. use_only_mapped is ignored for types with alternate id fields



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# File 'lib/ncc/connection.rb', line 152

def use_only_mapped(type)
    false
end

#warn(msg) ⇒ Object 



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# File 'lib/ncc/connection.rb', line 79

def warn(msg)
    if @logger and @logger.respond_to? :warn
        @logger.warn "#{self} #{msg}"
    end
end