Class: ActiveJobK8s::Scheduler

Inherits:
Object
  • Object
show all
Defined in:
lib/active_job_k8s/scheduler.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(**opts) ⇒ Scheduler

Returns a new instance of Scheduler.

Parameters:

  • opts (Hash{ kubeclient_context: Kubeclient::Config::Context, default_manifest: Hash }) 


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# File 'lib/active_job_k8s/scheduler.rb', line 15

def initialize(**opts)
  raise "No KubeClientContext given" if opts[:kubeclient_context].nil?
  # or to use a specific context, by name:
  @kubeclient_context = opts[:kubeclient_context]
  @default_manifest = opts[:default_manifest] || {}

end

Instance Attribute Details

#default_manifest ⇒ Hash (readonly)

Returns:

  • (Hash) 


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# File 'lib/active_job_k8s/scheduler.rb', line 12

def default_manifest
  @default_manifest
end

#kubeclient_context ⇒ Kubeclient::Config::Context (readonly)

Returns:

  • (Kubeclient::Config::Context) 


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# File 'lib/active_job_k8s/scheduler.rb', line 9

def kubeclient_context
  @kubeclient_context
end

Class Method Details

.execute_job ⇒ Object 



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# File 'lib/active_job_k8s/scheduler.rb', line 60

def self.execute_job
  ActiveJob::Base.execute(JSON.parse(ENV['SERIALIZED_JOB']))
end

Instance Method Details

#create_job(job, scheduled_at: nil) ⇒ Object 



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# File 'lib/active_job_k8s/scheduler.rb', line 23

def create_job(job, scheduled_at: nil)

  serialized_job = JSON.dump(job.serialize)

  manifest = (job.respond_to?(:manifest) and job.manifest.is_a?(Hash) and !job.manifest.empty?) ? job.manifest : default_manifest
  kube_job = Kubeclient::Resource.new(manifest)

  kube_job.metadata.name = "#{kube_job.metadata.name}-#{job.job_id}"
  kube_job.metadata.annotations ||= {}
  kube_job.metadata.annotations.job_id = job.job_id
  kube_job.metadata.annotations.queue_name = job.queue_name
  kube_job.metadata.namespace = kube_job.metadata.namespace || kubeclient_context.namespace
  kube_job.spec.template.spec.containers.map do |container|
    container.env ||= []
    container.env.push({
                         'name' => 'SERIALIZED_JOB',
                         'value' => serialized_job
                       })

    if container.command.blank?
      container.command = ["rails"]
      container.args = ["active_job_k8s:run_job"]
    end
  end
  kube_job.spec.ttlSecondsAfterFinished = 300 #number of seconds the job will be erased

  kube_job.metadata.labels ||= {}
  if scheduled_at
    kube_job.spec.suspend = true
    kube_job.metadata.annotations.scheduled_at = scheduled_at.to_s
    kube_job.metadata.labels.activeJobK8s = "scheduled" # job to be execute when time comes
  else
    kube_job.metadata.labels.activeJobK8s = "delayed" # job to be execute when possible
  end
  client.create_job(kube_job)
end

#un_suspend_jobs ⇒ Object

Un-suspend jobs if the scheduled at is outdated



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# File 'lib/active_job_k8s/scheduler.rb', line 66

def un_suspend_jobs
  suspended_jobs.each do |sj|
    scheduled_at = Time.at(sj.metadata.annotations.scheduled_at.to_f)
    if Time.now > scheduled_at and sj.spec.suspend
      client.patch_job(sj.metadata.name, { spec: { suspend: false } }, sj.metadata.namespace).inspect
    end
  end
end