Class: Docker::Swarm::Swarm

Inherits:
Object
  • Object
show all
Includes:
Docker
Defined in:
lib/docker/swarm/swarm.rb

Overview

This class represents a Docker Swarm Node.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#hash ⇒ Object (readonly)

Returns the value of attribute hash.



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# File 'lib/docker/swarm/swarm.rb', line 8

def hash
  @hash
end

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/docker/swarm/swarm.rb', line 8

def id
  @id
end

#manager_ip ⇒ Object (readonly)

Returns the value of attribute manager_ip.



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# File 'lib/docker/swarm/swarm.rb', line 8

def manager_ip
  @manager_ip
end

#manager_join_token ⇒ Object (readonly)

Returns the value of attribute manager_join_token.



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# File 'lib/docker/swarm/swarm.rb', line 8

def manager_join_token
  @manager_join_token
end

#node_hash ⇒ Object (readonly)

Returns the value of attribute node_hash.



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# File 'lib/docker/swarm/swarm.rb', line 8

def node_hash
  @node_hash
end

#node_ip ⇒ Object (readonly)

Returns the value of attribute node_ip.



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# File 'lib/docker/swarm/swarm.rb', line 8

def node_ip
  @node_ip
end

#worker_join_token ⇒ Object (readonly)

Returns the value of attribute worker_join_token.



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# File 'lib/docker/swarm/swarm.rb', line 8

def worker_join_token
  @worker_join_token
end

Class Method Details

.find(connection, options = {}) ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 329

def self.find(connection, options = {})
  query = {}
  response = connection.get('/swarm', query, expects: [200, 404, 406], full_response: true)
  if (response.status == 200)
    hash = JSON.parse(response.body)
    swarm = self.find_swarm_for_id(hash['ID'])
    if (swarm)
      swarm.update_data(hash)
    else
      swarm = Docker::Swarm::Swarm.new(hash, connection, options)
    end
    manager_node = swarm.nodes.find {|n|
      (n.hash['ManagerStatus']) && (n.hash['ManagerStatus']['Leader'] == true)
    }
    listen_address = manager_node.hash['ManagerStatus']['Addr']
    swarm.store_manager(connection, listen_address)
    return swarm
  elsif (response.status > 200)
    return nil
  else
    raise "Error finding swarm: HTTP-#{response.status} #{response.body}"
  end
end

.init(opts, connection) ⇒ Object

Initialize Swarm



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# File 'lib/docker/swarm/swarm.rb', line 282

def self.init(opts, connection)
  query = {}
  resp = connection.post('/swarm/init', query, :body => opts.to_json, full_response: true, expects: [200, 404, 406, 500])
  if (resp.status == 200)
    swarm = Docker::Swarm::Swarm.swarm(opts, connection)
    manager_node = swarm.nodes.find {|n|
      (n.hash['ManagerStatus']) && (n.hash['ManagerStatus']['Leader'] == true)
    }
    byebug
    listen_address = manager_node.hash['ManagerStatus']['Addr']
    swarm.store_manager(connection, listen_address)
    return swarm
  else
    raise "Bad response: #{resp.status} #{resp.body}"
  end
end

.leave(force, connection) ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 320

def self.leave(force, connection)
  query = {}
  query['force'] = force
  response = connection.post('/swarm/leave', query, expects: [200, 406, 500], full_response: true)
  if (response.status == 500)
    raise "Error leaving: #{response.body}  HTTP-#{response.status}"
  end
end

.swarm(connection, options = {}) ⇒ Object

docker swarm join-token -q worker



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# File 'lib/docker/swarm/swarm.rb', line 300

def self.swarm(connection, options = {})
  swarm = nil
  query = {}
  resp = connection.get('/swarm', query, :body => options.to_json, expects: [200, 404, 406], full_response: true)
  if (resp.status == 406) || (resp.status == 404)
    return nil
  elsif (resp.status == 200)
    hash = JSON.parse(resp.body)
    swarm = self.find_swarm_for_id(hash['ID'])
    if (swarm)
      swarm.update_data(hash)
    else
      swarm = Docker::Swarm::Swarm.new(hash, connection, options)
    end
  else
    raise "Bad response: #{resp.status} #{resp.body}"
  end
  return swarm
end

Instance Method Details

#connection ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 70

def connection
  @node_hash.keys.each do |node_id|
    node_info = @node_hash[node_id]
    if (node_info[:hash]['ManagerStatus'])
      return node_info[:connection]
    end
  end
  return @manager_connection
end

#create_network(options) ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 139

def create_network(options)
  response = connection.post('/networks/create', {},  body: options.to_json, expects: [200, 201, 500], full_response: true)
  if (response.status <= 201)
    hash = JSON.parse(response.body)
    response = connection.get("/networks/#{hash['Id']}", {}, expects: [200, 201], full_response: true)
    hash = Docker::Util.parse_json(response.body)
    network = Docker::Swarm::Network.new(self, hash)
    return network
  else
    raise "Error creating network: HTTP-#{response.status} - #{response.body}"
  end
end

#create_network_overlay(network_name) ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 152

def create_network_overlay(network_name)
  subnet_16_parts = [10, 10, 0, 0]
  max_vxlanid = 200

  # Sometimes nodes have leftover networks not on other nodes, that have subnets that can't be duplicated in
  # the new overlay network.
  nodes.each do |node|
    node.networks.each do |network|
      if (network.driver == 'overlay')
        if (network.hash['Options'])
          vxlanid = network.hash['Options']["com.docker.network.driver.overlay.vxlanid_list"]
          if (vxlanid) && (vxlanid.to_i > max_vxlanid)
            max_vxlanid = vxlanid.to_i
          end
        end
      end

      # Make sure our new network doesn't duplicate subnet of other network.
      if (network.hash['IPAM']) && (network.hash['IPAM']['Config'])
        network.hash['IPAM']['Config'].each do |subnet_config|
          if (subnet_config['Subnet'])
            subnet = subnet_config['Subnet']
            subnet = subnet.split(".")
            if (subnet[0] == '10') && (subnet[1] == '255')
            else
              if (subnet[0].to_i == subnet_16_parts[0])
                if (subnet[1].to_i >= subnet_16_parts[1])
                  subnet_16_parts[1] = subnet[1].to_i + 1
                  if (subnet_16_parts[1] >= 255)
                    raise "Ran out of subnets"
                  end
                end
              end
            end
#            subnet_config['Gateway']
          end
        end
      end
    end
  end


  options = {
      "Name" => network_name,
      "CheckDuplicate" => true,
      "Driver" => "overlay",
      "EnableIPv6" => false,
      "IPAM" => {
        "Driver" => "default",
        "Config" => [
          {
           "Subnet" => "#{subnet_16_parts.join(".")}/16",
           "Gateway"=> "#{subnet_16_parts[0, 3].join('.')}.1"
         }
        ],
         "Options" => {
         }
      },
      "Internal" => false,
      "Options" => {
        "com.docker.network.driver.overlay.vxlanid_list" => (max_vxlanid + 1).to_s
      },
      "Labels" => {
        # "com.example.some-label": "some-value",
        # "com.example.some-other-label": "some-other-value"
      }
    }
    create_network(options)
end

#create_service(opts = {}) ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 240

def create_service(opts = {})
  query = {}
  response = self.connection.post('/services/create', query, :body => opts.to_json, expects: [201, 404, 409, 500], full_response: true)
  if (response.status <= 201)
    info = JSON.parse(response.body)
    service_id = info['ID']
    return self.find_service(service_id)
  else
    raise "Error creating service:  HTTP-#{response.status}  #{response.body}"
  end
  return nil
end

#find_service(id) ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 253

def find_service(id)
  query = {}
  opts = {}
  response = self.connection.get("/services/#{id}", query, :body => opts.to_json)
  hash = JSON.parse(response)
  return Docker::Swarm::Service.new(self, hash)
end

#find_service_by_name(name) ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 261

def find_service_by_name(name)
  services.each do |service|
    return service if (service.name == name)
  end
  return nil
end

#join(node_connection, node_ip = nil, manager_ip = nil, join_token = nil, listen_address = "0.0.0.0:2377") ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 26

def join(node_connection, node_ip = nil, manager_ip = nil, join_token = nil, listen_address = "0.0.0.0:2377")
  node_ids_before = []
  query = {}

  unless socket_connection(node_connection)
    node_ids_before = nodes().collect {|n| n.id}
    node_ip = node_connection.url.split("//").last.split(":").first
    manager_ip = self.connection.url.split("//").last.split(":").first
  end

  join_options = {
          "ListenAddr" => "#{listen_address}",
          "AdvertiseAddr" => "#{node_ip}:2377",
          "RemoteAddrs" => ["#{manager_ip}:2377"],
          "JoinToken" => join_token
        }

  new_node = nil
  response = node_connection.post('/swarm/join', query, :body => join_options.to_json, expects: [200, 406, 500], full_response: true)

  if (response.status == 200)
    nodes.each do |node|
      if (!node_ids_before.include? node.id)
        new_node = node
        @node_hash[node.id] = {hash: node.hash, connection: node_connection}
      end
    end unless socket_connection(node_connection)
    return new_node
  elsif (response.status == 406)
    puts "Node is already part of a swarm - maybe this swarm, maybe another swarm."
    return nil
  else
    raise "Error joining (#{node_connection}):  HTTP-#{response.status}  #{response.body}"
  end
end

#join_manager(node_connection, listen_address = "0.0.0.0:2377") ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 66

def join_manager(node_connection, listen_address = "0.0.0.0:2377")
  join(node_connection, @node_ip, @manager_ip, @manager_join_token, listen_address)
end

#join_worker(node_connection, listen_address = "0.0.0.0:2377") ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 62

def join_worker(node_connection, listen_address = "0.0.0.0:2377")
  join(node_connection, @node_ip, @manager_ip, @worker_join_token)
end

#leave(node, force = false) ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 106

def leave(node, force = false)
  node_info = @node_hash[node.id]
  if (node_info)
    Docker::Swarm::Swarm.leave(force, node_info[:connection])
  end
end

#manager_nodes ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 117

def manager_nodes
  return nodes.select { |node| node.role == :manager} || []
end

#networks ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 125

def networks
  all_networks = []
  response = connection.get("/networks", {}, full_response: true)
  if (response.status == 200)
    hashes = JSON.parse(response.body)
    hashes.each do |hash|
      all_networks << Docker::Swarm::Network.new(self, hash)
    end
  else
    raise "Error finding netw"
  end
  return all_networks
end

#nodes ⇒ Object

Return all of the Nodes.



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# File 'lib/docker/swarm/swarm.rb', line 223

def nodes
  opts = {}
  query = {}
  response = self.connection.get('/nodes', query, :body => opts.to_json, expects: [200, 406], full_response: true)
  if (response.status == 200)
    hashes = JSON.parse(response.body)
    nodes = []
    hashes.each do |node_hash|
      node  = Docker::Swarm::Node.new(self, node_hash)
      nodes << node
    end
    return nodes || []
  else
    return []
  end
end

#remove ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 80

def remove
  services().each do |service|
    service.remove()
  end

  worker_nodes.each do |node|
    leave(node, true)
  end
  manager_nodes.each do |node|
    leave(node, true)
  end
end

#remove_node(worker_node) ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 113

def remove_node(worker_node)
  Swarm::Node.remove(worker_node.id, self.connection)
end

#services ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 268

def services
  items = []
  query = {}
  opts = {}
  response = self.connection.get("/services", query, :body => opts.to_json)
  hashes = JSON.parse(response)
  hashes.each do |hash|
    items << Docker::Swarm::Service.new(self, hash)
  end
  return items
end

#socket_connection(node_connection) ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 22

def socket_connection(node_connection)
  node_connection.url.include?('unix:///')
end

#store_manager(manager_connection, listen_address_and_port) ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 10

def store_manager(manager_connection, listen_address_and_port)
  node = nodes.find {|n|
    (n.hash['ManagerStatus']) && (n.hash['ManagerStatus']['Leader'] == true) && (n.hash['ManagerStatus']['Addr'] == listen_address_and_port)
  }
  raise "Node not found for: #{listen_address}" if (!node)
  @node_hash[node.id] = {hash: node.hash, connection: manager_connection}
end

#tasks ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 93

def tasks
  items = []
  query = {}
  opts = {}
  resp = self.connection.get('/tasks', query, :body => opts.to_json)
  hashes = JSON.parse(resp)
  items = []
  hashes.each do |hash|
    items << Swarm::Task.new(self, hash)
  end
  return items
end

#update_data(hash) ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 18

def update_data(hash)
  @hash = hash
end

#worker_nodes ⇒ Object 



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# File 'lib/docker/swarm/swarm.rb', line 121

def worker_nodes
  return nodes.select { |node| node.role == :worker} || []
end