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(POOLER-143) Add clone_target config change to API

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This allows the user to change the cluster in which the targeted pool
will clone to. Upon configuration change, the thread will wake up and
execute the change within 1 second.
This commit is contained in:
Spencer McElmurry 2019-07-26 12:28:16 -07:00
parent 5bbaf7e8cf
commit 98a547b807
4 changed files with 222 additions and 3 deletions
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32
lib/vmpooler/pool_manager.rb
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@ -680,6 +680,10 @@ module Vmpooler
initial_ready_size = $redis.scard("vmpooler__ready__#{options[:poolname]}")
end
if options[:clone_target_change]
initial_clone_target = $redis.hget("vmpooler__pool__#{options[:poolname]}", options[:clone_target])
end
if options[:pool_template_change]
initial_template = $redis.hget('vmpooler__template__prepared', options[:poolname])
end
@ -698,6 +702,13 @@ module Vmpooler
break unless ready_size == initial_ready_size
end
if options[:clone_target_change]
clone_target = $redis.hget("vmpooler__config__clone_target}", options[:poolname])
if clone_target
break unless clone_target == initial_clone_target
end
end
if options[:pool_template_change]
configured_template = $redis.hget('vmpooler__config__template', options[:poolname])
if configured_template
@ -742,7 +753,7 @@ module Vmpooler
loop_delay = (loop_delay * loop_delay_decay).to_i
loop_delay = loop_delay_max if loop_delay > loop_delay_max
end
sleep_with_wakeup_events(loop_delay, loop_delay_min, pool_size_change: true, poolname: pool['name'], pool_template_change: true)
sleep_with_wakeup_events(loop_delay, loop_delay_min, pool_size_change: true, poolname: pool['name'], pool_template_change: true, clone_target_change: true)
unless maxloop.zero?
break if loop_count >= maxloop
@ -847,6 +858,21 @@ module Vmpooler
$logger.log('s', "[*] [#{pool['name']}] is ready for use")
end
def update_clone_target(pool)
mutex = pool_mutex(pool['name'])
return if mutex.locked?
clone_target = $redis.hget('vmpooler__config__clone_target', pool['name'])
return if clone_target.nil?
return if clone_target == pool['clone_target']
$logger.log('s', "[*] [#{pool['name']}] clone updated from #{pool['clone_target']} to #{clone_target}")
mutex.synchronize do
pool['clone_target'] = clone_target
# Remove all ready and pending VMs so new instances are created for the new clone_target
drain_pool(pool['name'])
end
$logger.log('s', "[*] [#{pool['name']}] is ready for use")
end
def remove_excess_vms(pool)
ready = $redis.scard("vmpooler__ready__#{pool['name']}")
total = $redis.scard("vmpooler__pending__#{pool['name']}") + ready
@ -1080,6 +1106,10 @@ module Vmpooler
# otherwise identify this change when running
update_pool_size(pool)
# Check to see if a pool size change has been made via the configuration API
# Additionally, a pool will drain ready and pending instances
update_clone_target(pool)
repopulate_pool_vms(pool['name'], provider, pool_check_response, pool['size'])
# Remove VMs in excess of the configured pool size