Class: Rollo::Commands::Hosts

Inherits:
Thor
  • Object
show all
Defined in:
lib/rollo/commands/hosts.rb

Overview

rubocop:disable Metrics/ClassLength

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.exit_on_failure? ⇒ Boolean

Returns:

  • (Boolean) 


12
13
14
 
# File 'lib/rollo/commands/hosts.rb', line 12

def self.exit_on_failure?
  true
end

Instance Method Details

#contract(region, asg_name, ecs_cluster_name, host_cluster = nil, service_cluster = nil) ⇒ Object

rubocop:disable Metrics/AbcSize rubocop:disable Metrics/MethodLength



82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
 
# File 'lib/rollo/commands/hosts.rb', line 82

def contract(
  region, asg_name, ecs_cluster_name,
  host_cluster = nil, service_cluster = nil
)
  batch_size = options[:batch_size]

  host_cluster ||= Rollo::Model::HostCluster.new(asg_name, region)
  service_cluster ||= Rollo::Model::ServiceCluster.new(
    ecs_cluster_name, region
  )

  say("Decreasing host cluster desired capacity by #{batch_size}...")
  # rubocop:disable Metrics/BlockLength
  with_padding do
    host_cluster.decrease_capacity_by(batch_size) do |on|
      on.prepare do |current, target|
        say(
          "Changing desired capacity from #{current} to " \
          "#{target}..."
        )
      end
      on.waiting_for_start do |attempt|
        say(
          'Waiting for capacity change to start ' \
          "(attempt #{attempt})..."
        )
      end
      on.waiting_for_end do |attempt|
        say(
          'Waiting for capacity change to complete ' \
          "(attempt #{attempt})..."
        )
      end
      on.waiting_for_health do |attempt|
        say(
          'Waiting for host cluster to reach healthy state ' \
          "(attempt #{attempt})..."
        )
      end
    end
    service_cluster.with_replica_services do |services|
      services.each_service do |service|
        service.wait_for_service_health do |on|
          on.waiting_for_health do |attempt|
            say(
              "Waiting for service #{service.name} to reach a " \
              "steady state (attempt #{attempt})..."
            )
          end
        end
      end
    end
  end
  # rubocop:enable Metrics/BlockLength
  say 'Host cluster desired capacity decreased, continuing...'
end

#expand(region, asg_name, _, host_cluster = nil) ⇒ Object

rubocop:disable Metrics/AbcSize rubocop:disable Metrics/MethodLength



29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
 
# File 'lib/rollo/commands/hosts.rb', line 29

def expand(
  region, asg_name, _,
  host_cluster = nil
)
  batch_size = options[:batch_size]

  host_cluster ||= Rollo::Model::HostCluster.new(asg_name, region)

  say("Increasing host cluster desired capacity by #{batch_size}...")
  with_padding do
    host_cluster.increase_capacity_by(batch_size) do |on|
      on.prepare do |current, target|
        say(
          "Changing desired capacity from #{current} to " \
          "#{target}..."
        )
      end
      on.waiting_for_start do |attempt|
        say(
          'Waiting for capacity change to start ' \
          "(attempt #{attempt})..."
        )
      end
      on.waiting_for_end do |attempt|
        say(
          'Waiting for capacity change to complete ' \
          "(attempt #{attempt})..."
        )
      end
      on.waiting_for_health do |attempt|
        say("Waiting for a healthy state (attempt #{attempt})")
      end
    end
  end
  say 'Host cluster desired capacity increased, continuing...'
end

#terminate(region, asg_name, ecs_cluster_name, instance_ids, host_cluster = nil, service_cluster = nil) ⇒ Object

rubocop:disable Metrics/MethodLength rubocop:disable Metrics/AbcSize rubocop:disable Metrics/ParameterLists



163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
 
# File 'lib/rollo/commands/hosts.rb', line 163

def terminate(
  region, asg_name, ecs_cluster_name, instance_ids,
  host_cluster = nil, service_cluster = nil
)
  batch_size = options[:batch_size]

  service_start_wait_minutes = options[:startup_time]
  service_start_wait_seconds = 60 * service_start_wait_minutes

  host_cluster ||= Rollo::Model::HostCluster.new(asg_name, region)
  service_cluster ||= Rollo::Model::ServiceCluster.new(ecs_cluster_name,
                                                       region)

  hosts = host_cluster.hosts.select { |h| instance_ids.include?(h.id) }
  host_batches = hosts.each_slice(batch_size).to_a

  say(
    'Terminating old hosts in host cluster in batches of ' \
    "#{batch_size}..."
  )
  # rubocop:disable Metrics/BlockLength
  with_padding do
    host_batches.each_with_index do |host_batch, index|
      say(
        "Batch #{index + 1} contains hosts: " \
        "\n\t\t[#{host_batch.map(&:id).join(",\n\t\t ")}]\n" \
        'Terminating...'
      )
      host_batch.each(&:terminate)
      host_cluster.wait_for_capacity_health do |on|
        on.waiting_for_health do |attempt|
          say(
            'Waiting for host cluster to reach healthy state ' \
            "(attempt #{attempt})"
          )
        end
      end
      service_cluster.with_replica_services do |services|
        services.each_service do |service|
          service.wait_for_service_health do |on|
            on.waiting_for_health do |attempt|
              say(
                "Waiting for service #{service.name} to reach a " \
                "steady state (attempt #{attempt})..."
              )
            end
          end
        end
      end
      say(
        "Waiting #{service_start_wait_minutes} minute(s) for " \
        'services to finish starting...'
      )
      sleep(service_start_wait_seconds)
      say(
        "Waited #{service_start_wait_minutes} minute(s). " \
        'Continuing...'
      )
    end
  end
  # rubocop:enable Metrics/BlockLength
end