Class: OsCtld::AutoStart::Plan

Inherits:
Object
  • Object
show all
Includes:
OsCtl::Lib::Utils::Log
Defined in:
lib/osctld/auto_start/plan.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(pool) ⇒ Plan

Returns a new instance of Plan.



10
11
12
13
14
15
16
17
 
# File 'lib/osctld/auto_start/plan.rb', line 10

def initialize(pool)
  @pool = pool
  @plan = ContinuousExecutor.new(pool.parallel_start)
  @state = AutoStart::State.load(pool)
  @reboot = AutoStart::Reboot.load(pool)
  @stop = false
  @nproc = Etc.nprocessors
end

Instance Attribute Details

#plan ⇒ Object (readonly, protected)

Returns the value of attribute plan.



146
147
148
 
# File 'lib/osctld/auto_start/plan.rb', line 146

def plan
  @plan
end

#pool ⇒ Object (readonly)

Returns the value of attribute pool.



8
9
10
 
# File 'lib/osctld/auto_start/plan.rb', line 8

def pool
  @pool
end

#reboot ⇒ Object (readonly, protected)

Returns the value of attribute reboot.



146
147
148
 
# File 'lib/osctld/auto_start/plan.rb', line 146

def reboot
  @reboot
end

#state ⇒ Object (readonly, protected)

Returns the value of attribute state.



146
147
148
 
# File 'lib/osctld/auto_start/plan.rb', line 146

def state
  @state
end

Instance Method Details

#assets(add) ⇒ Object 



19
20
21
22
 
# File 'lib/osctld/auto_start/plan.rb', line 19

def assets(add)
  state.assets(add)
  reboot.assets(add)
end

#clear ⇒ Object 



128
129
130
 
# File 'lib/osctld/auto_start/plan.rb', line 128

def clear
  plan.clear
end

#clear_ct(ct) ⇒ Object 



123
124
125
126
 
# File 'lib/osctld/auto_start/plan.rb', line 123

def clear_ct(ct)
  state.clear(ct)
  reboot.clear(ct)
end

#delay_after_start? ⇒ Boolean (protected)

Returns:

  • (Boolean) 


194
195
196
197
 
# File 'lib/osctld/auto_start/plan.rb', line 194

def delay_after_start?
  lavg = OsCtl::Lib::LoadAvg.new
  lavg.avg[1] >= @nproc
end

#do_try_start_ct(ct, attempts: 5, cooldown: 5, start_opts: {}) ⇒ Object (protected) 



148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
 
# File 'lib/osctld/auto_start/plan.rb', line 148

def do_try_start_ct(ct, attempts: 5, cooldown: 5, start_opts: {})
  attempts.times do |i|
    return if stop?

    ret = Commands::Container::Start.run(**start_opts.merge(
      pool: ct.pool.name,
      id: ct.id,
      wait: 'infinity',
    ))

    if ret[:status]
      state.set_started(ct)
      return if stop?

      if delay_after_start?
        log(:info, ct, "Autostart delay for #{ct.autostart.delay} seconds")
        sleep(ct.autostart.delay)
      else
        log(:info, ct, 'Skipping autostart delay thanks to low system load average')
      end

      return
    end

    if i+1 == attempts
      log(:warn, ct, 'All attempts to start the container have failed')
      return
    end

    if stop?
      log(:warn, ct, "Unable to start the container, giving up to stop")
      return
    else
      pause = cooldown + i * cooldown
      log(:warn, ct, "Unable to start the container, retrying in #{pause} seconds")
      sleep(pause)
    end
  end
end

#enqueue(ct, priority: 10, start_opts: {}) ⇒ Object 



74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
 
# File 'lib/osctld/auto_start/plan.rb', line 74

def enqueue(ct, priority: 10, start_opts: {})
  plan << (
    ContinuousExecutor::Command.new(id: ct.id, priority: priority) do |cmd|
      cur_ct = DB::Containers.find(cmd.id, pool)
      next if cur_ct.nil? || cur_ct.running?

      prestart_delay(cur_ct)
      log(:info, ct, 'Starting enqueued container')
      do_try_start_ct(
        cur_ct,
        start_opts: start_opts.merge(queue: false),
      )
    end
  )
end

#fulfil_reboot(ct) ⇒ Object 



115
116
117
 
# File 'lib/osctld/auto_start/plan.rb', line 115

def fulfil_reboot(ct)
  reboot.clear(ct)
end

#prestart_delay(ct) ⇒ Object (protected) 



188
189
190
191
192
 
# File 'lib/osctld/auto_start/plan.rb', line 188

def prestart_delay(ct)
  delay = rand(0.0..3.0)
  log(:info, ct, "Delaying auto-start by #{delay.round(2)}s")
  sleep(delay)
end

#queue ⇒ Object 



141
142
143
 
# File 'lib/osctld/auto_start/plan.rb', line 141

def queue
  plan.queue
end

#request_reboot(ct) ⇒ Object 



111
112
113
 
# File 'lib/osctld/auto_start/plan.rb', line 111

def request_reboot(ct)
  reboot.add(ct)
end

#resize(new_size) ⇒ Object 



132
133
134
 
# File 'lib/osctld/auto_start/plan.rb', line 132

def resize(new_size)
  plan.resize(new_size)
end

#start(force: false) ⇒ Object 



24
25
26
27
28
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
65
66
67
68
69
70
71
72
 
# File 'lib/osctld/auto_start/plan.rb', line 24

def start(force: false)
  @stop = false

  log(
    :info, pool,
    "Auto-starting containers, #{pool.parallel_start} containers at a time"
  )

  # Select containers for autostart
  cts = DB::Containers.get.select do |ct|
    next(false) if ct.pool != pool
    next(true) if reboot.include?(ct) && ct.can_start?
    next(true) if ct.autostart && ct.can_start? && (force || !state.is_started?(ct))
    next(false)
  end

  # Preschedule the containers
  if CpuScheduler.use?
    cts.reject do |ct|
      ct.running?
    end.sort do |a, b|
      b.hints.cpu_daily.usage_us <=> a.hints.cpu_daily.usage_us
    end.each do |ct|
      CpuScheduler.preschedule_ct(ct)
    end
  end

  # Start the containers
  plan << (cts.map do |ct|
    ContinuousExecutor::Command.new(
      id: ct.id,
      priority: ct.autostart.priority,
    ) do |cmd|
      cur_ct = DB::Containers.find(cmd.id, pool)
      if cur_ct.nil? || !cur_ct.can_start?
        CpuScheduler.cancel_preschedule_ct(ct)
        next
      elsif cur_ct.running?
        CpuScheduler.cancel_preschedule_ct(ct)
        state.set_started(cur_ct)
        next
      end

      prestart_delay(cur_ct)
      log(:info, cur_ct, 'Auto-starting container')
      do_try_start_ct(cur_ct)
    end
  end)
end

#start_ct(ct, priority: 10, start_opts: {}, client_handler: nil) ⇒ Object 



90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
 
# File 'lib/osctld/auto_start/plan.rb', line 90

def start_ct(ct, priority: 10, start_opts: {}, client_handler: nil)
  plan.execute(
    ContinuousExecutor::Command.new(id: ct.id, priority: priority) do |cmd|
      cur_ct = DB::Containers.find(cmd.id, pool)
      next if cur_ct.nil? || cur_ct.running?

      prestart_delay(cur_ct)
      log(:info, ct, 'Starting enqueued container')
      Commands::Container::Start.run(
        **start_opts.merge(
          pool: cur_ct.pool.name,
          id: cur_ct.id,
          queue: false,
          internal: {handler: client_handler},
        ),
      )
    end,
    timeout: start_opts ? (start_opts[:wait] || Container::DEFAULT_START_TIMEOUT) : nil,
  )
end

#stop ⇒ Object 



136
137
138
139
 
# File 'lib/osctld/auto_start/plan.rb', line 136

def stop
  @stop = true
  plan.stop
end

#stop? ⇒ Boolean (protected)

Returns:

  • (Boolean) 


199
200
201
 
# File 'lib/osctld/auto_start/plan.rb', line 199

def stop?
  @stop
end

#stop_ct(ct) ⇒ Object 



119
120
121
 
# File 'lib/osctld/auto_start/plan.rb', line 119

def stop_ct(ct)
  plan.remove(ct.id)
end