Class: OodCore::Job::Adapters::Slurm::Batch Private

Inherits:
Object
  • Object
show all
Defined in:
lib/ood_core/job/adapters/slurm.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Object used for simplified communication with a Slurm batch server

Defined Under Namespace

Classes: Error, SlurmTimeoutError

Constant Summary collapse

UNIT_SEPARATOR =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

"\x1F"
RECORD_SEPARATOR =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future. 

"\x1E"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(cluster: nil, bin: nil, conf: nil, bin_overrides: {}, submit_host: "", strict_host_checking: true) ⇒ Batch

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of Batch.

Parameters:

  • cluster (#to_s, nil) (defaults to: nil) —

    the cluster name

  • conf (#to_s, nil) (defaults to: nil) —

    path to the slurm conf

  • bin (#to_s) (defaults to: nil) —

    path to slurm installation binaries

  • bin_overrides (#to_h) (defaults to: {}) —

    a hash of bin ovverides to be used in job

  • submit_host (#to_s) (defaults to: "") —

    Submits the job on a login node via ssh

  • strict_host_checking (Bool) (defaults to: true) —

    Whether to use strict host checking when ssh to submit_host



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# File 'lib/ood_core/job/adapters/slurm.rb', line 100

def initialize(cluster: nil, bin: nil, conf: nil, bin_overrides: {}, submit_host: "", strict_host_checking: true)
  @cluster              = cluster && cluster.to_s
  @conf                 = conf    && Pathname.new(conf.to_s)
  @bin                  = Pathname.new(bin.to_s)
  @bin_overrides        = bin_overrides
  @submit_host          = submit_host.to_s
  @strict_host_checking = strict_host_checking
end

Instance Attribute Details

#bin ⇒ Pathname (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

The path to the Slurm client installation binaries

Examples:

For Slurm 10.0.0

my_batch.bin.to_s #=> "/usr/local/slurm/10.0.0/bin

Returns:

  • (Pathname) —

    path to slurm binaries



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# File 'lib/ood_core/job/adapters/slurm.rb', line 69

def bin
  @bin
end

#bin_overrides ⇒ Object (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Optional overrides for Slurm client executables

Examples:

{'sbatch' => '/usr/local/bin/sbatch'}


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# File 'lib/ood_core/job/adapters/slurm.rb', line 75

def bin_overrides
  @bin_overrides
end

#cluster ⇒ String? (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

The cluster of the Slurm batch server

Examples:

CHPC's kingspeak cluster

my_batch.cluster #=> "kingspeak"

Returns:

  • (String, nil) —

    the cluster name



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# File 'lib/ood_core/job/adapters/slurm.rb', line 57

def cluster
  @cluster
end

#conf ⇒ Pathname? (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

The path to the Slurm configuration file

Examples:

For Slurm 10.0.0

my_batch.conf.to_s #=> "/usr/local/slurm/10.0.0/etc/slurm.conf

Returns:

  • (Pathname, nil) —

    path to slurm conf



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# File 'lib/ood_core/job/adapters/slurm.rb', line 63

def conf
  @conf
end

#strict_host_checking ⇒ Bool (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Wheter to use strict host checking when ssh to submit_host

Examples:

false

Returns:

  • (Bool) —

    ; true if empty



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# File 'lib/ood_core/job/adapters/slurm.rb', line 85

def strict_host_checking
  @strict_host_checking
end

#submit_host ⇒ String (readonly)

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

The login node where the job is submitted via ssh

Examples:

owens.osc.edu

Returns:

  • (String) —

    The login node



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# File 'lib/ood_core/job/adapters/slurm.rb', line 80

def submit_host
  @submit_host
end

Instance Method Details

#accounts ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/ood_core/job/adapters/slurm.rb', line 183

def accounts
  user = Etc.getlogin
  args = ['-nP', 'show', 'users', 'withassoc', 'format=account,cluster,partition,qos', 'where', "user=#{user}"]

  [].tap do |accts|
    call('sacctmgr', *args).each_line do |line|
      acct, cluster, queue, qos = line.split('|')
      next if acct.nil? || acct.chomp.empty?

      args = {
        name: acct,
        qos: qos.to_s.chomp.split(','),
        cluster: cluster,
        queue: queue.to_s.empty? ? nil : queue
      }
      info = OodCore::Job::AccountInfo.new(**args) unless acct.nil?
      accts << info unless acct.nil?
    end
  end
end

#all_sinfo_node_fields ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/ood_core/job/adapters/slurm.rb', line 336

def all_sinfo_node_fields
  {
    procs: '%c',
    name: '%n',
    features: '%f'
  }
end

#all_squeue_fields ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Fields requested from a formatted `squeue` call Note that the order of these fields is important



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# File 'lib/ood_core/job/adapters/slurm.rb', line 272

def all_squeue_fields
  {
    account: "%a",
    job_id: "%A",
    exec_host: "%B",
    min_cpus: "%c",
    cpus: "%C",
    min_tmp_disk: "%d",
    nodes: "%D",
    end_time: "%e",
    dependency: "%E",
    features: "%f",
    array_job_id: "%F",
    group_name: "%g",
    group_id: "%G",
    over_subscribe: "%h",
    sockets_per_node: "%H",
    array_job_task_id: "%i",
    cores_per_socket: "%I",
    job_name: "%j",
    threads_per_core: "%J",
    comment: "%k",
    array_task_id: "%K",
    time_limit: "%l",
    time_left: "%L",
    min_memory: "%m",
    time_used: "%M",
    req_node: "%n",
    node_list: "%N",
    command: "%o",
    contiguous: "%O",
    qos: "%q",
    partition: "%P",
    priority: "%Q",
    reason: "%r",
    start_time: "%S",
    state_compact: "%t",
    state: "%T",
    user: "%u",
    user_id: "%U",
    reservation: "%v",
    submit_time: "%V",
    wckey: "%w",
    licenses: "%W",
    excluded_nodes: "%x",
    core_specialization: "%X",
    nice: "%y",
    scheduled_nodes: "%Y",
    sockets_cores_threads: "%z",
    work_dir: "%Z",
    gres: "%b",  # must come at the end to fix a bug with Slurm 18
  }
end

#delete_job(id) ⇒ void

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

This method returns an undefined value.

Delete a specified job from batch server

Examples:

Delete job “1234”

my_batch.delete_job("1234")

Parameters:

  • id (#to_s) —

    the id of the job

Raises:

  • (Error) —

    if `scancel` command exited unsuccessfully



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# File 'lib/ood_core/job/adapters/slurm.rb', line 254

def delete_job(id)
  call("scancel", id.to_s)
end

#get_cluster_info ⇒ ClusterInfo

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Get a ClusterInfo object containing information about the given cluster

Returns:



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# File 'lib/ood_core/job/adapters/slurm.rb', line 111

def get_cluster_info
  node_cpu_info = call("sinfo", "-aho %A/%D/%C").strip.split('/')
  gres_length = call("sinfo", "-o %G").lines.map(&:strip).map(&:length).max + 2
  gres_lines = call("sinfo", "-ahNO ,nodehost,gres:#{gres_length},gresused:#{gres_length}")
               .lines.uniq.map(&:split)
  ClusterInfo.new(active_nodes: node_cpu_info[0].to_i,
                  total_nodes: node_cpu_info[2].to_i,
                  active_processors: node_cpu_info[3].to_i,
                  total_processors: node_cpu_info[6].to_i,
                  active_gpus: gres_lines.sum { |line| Slurm.gpus_from_gres(line[2]) },
                  total_gpus: gres_lines.sum { |line| Slurm.gpus_from_gres(line[1]) }
  )
end

#get_jobs(id: "", owner: nil, attrs: nil) ⇒ Array<Hash>

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Get a list of hashes detailing each of the jobs on the batch server

Examples:

Status info for all jobs

my_batch.get_jobs
#=>
#[
#  {
#    :account => "account",
#    :job_id => "my_job",
#    ...
#  },
#  {
#    :account => "account",
#    :job_id => "my_other_job",
#    ...
#  },
#  ...
#]

Parameters:

  • id (#to_s) (defaults to: "") —

    the id of the job

  • owner (String) (defaults to: nil) —

    the owner(s) of the job

  • attrs (Array<Symbol>, nil) (defaults to: nil) —

    list of attributes request when calling squeue

Returns:

  • (Array<Hash>) —

    list of details for jobs

Raises:

  • (Error) —

    if `squeue` command exited unsuccessfully



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# File 'lib/ood_core/job/adapters/slurm.rb', line 147

def get_jobs(id: "", owner: nil, attrs: nil)
  fields = squeue_fields(attrs)
  args = squeue_args(id: id, owner: owner, options: fields.values)

  #TODO: switch mock of Open3 to be the squeue mock script
  # then you can use that for performance metrics
  StringIO.open(call("squeue", *args)) do |output|
    advance_past_squeue_header!(output)

    jobs = []
    output.each_line(RECORD_SEPARATOR) do |line|
      # TODO: once you can do performance metrics you can test zip against some other tools
      # or just small optimizations
      # for example, fields is ALREADY A HASH and we are setting the VALUES to
      # "line.strip.split(unit_separator)" array
      #
      # i.e. store keys in an array, do Hash[[keys, values].transpose]
      #
      # or
      #
      # job = {}
      # keys.each_with_index { |key, index| [key] = values[index] }
      # jobs << job
      #
      # assuming keys and values are same length! if not we have an error!
      line = line.encode('UTF-8', invalid: :replace, undef: :replace)
      values = line.chomp(RECORD_SEPARATOR).strip.split(UNIT_SEPARATOR)
      jobs << Hash[fields.keys.zip(values)] unless values.empty?
    end
    jobs
  end
rescue SlurmTimeoutError
  # TODO: could use a log entry here
  return [{ id: id, state: 'undetermined' }]
end

#hold_job(id) ⇒ void

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

This method returns an undefined value.

Put a specified job on hold

Examples:

Put job “1234” on hold

my_batch.hold_job("1234")

Parameters:

  • id (#to_s) —

    the id of the job

Raises:

  • (Error) —

    if `scontrol` command exited unsuccessfully



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# File 'lib/ood_core/job/adapters/slurm.rb', line 234

def hold_job(id)
  call("scontrol", "hold", id.to_s)
end

#nodes ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/ood_core/job/adapters/slurm.rb', line 344

def nodes
  args = all_sinfo_node_fields.values.join(UNIT_SEPARATOR)
  output = call('sinfo', '-ho', "#{RECORD_SEPARATOR}#{args}")

  output.each_line(RECORD_SEPARATOR).map do |line|
    values = line.chomp(RECORD_SEPARATOR).strip.split(UNIT_SEPARATOR)

    next if values.empty?

    data = Hash[all_sinfo_node_fields.keys.zip(values)]
    data[:name] = data[:name].to_s.split(',').first
    data[:features] = data[:features].to_s.split(',')
    NodeInfo.new(**data)
  end.compact
end

#queues ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/ood_core/job/adapters/slurm.rb', line 326

def queues
  info_raw = call('scontrol', 'show', 'part', '-o')

  [].tap do |ret_arr|
    info_raw.each_line do |line|
      ret_arr << str_to_queue_info(line)
    end
  end
end

#release_job(id) ⇒ void

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

This method returns an undefined value.

Release a specified job that is on hold

Examples:

Release job “1234” from on hold

my_batch.release_job("1234")

Parameters:

  • id (#to_s) —

    the id of the job

Raises:

  • (Error) —

    if `scontrol` command exited unsuccessfully



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# File 'lib/ood_core/job/adapters/slurm.rb', line 244

def release_job(id)
  call("scontrol", "release", id.to_s)
end

#squeue_args(id: "", owner: nil, options: []) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

TODO: write some barebones test for this? like 2 options and id or no id



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# File 'lib/ood_core/job/adapters/slurm.rb', line 220

def squeue_args(id: "", owner: nil, options: [])
  args  = ["--all", "--states=all", "--noconvert"]
  args.concat ["-o", "#{RECORD_SEPARATOR}#{options.join(UNIT_SEPARATOR)}"]
  args.concat ["-u", owner.to_s] unless owner.to_s.empty?
  args.concat ["-j", id.to_s] unless id.to_s.empty?
  args
end

#squeue_fields(attrs) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/ood_core/job/adapters/slurm.rb', line 204

def squeue_fields(attrs)
  if attrs.nil?
    all_squeue_fields
  else
    all_squeue_fields.slice(*squeue_attrs_for_info_attrs(Array.wrap(attrs) + squeue_required_fields))
  end
end

#squeue_required_fields ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/ood_core/job/adapters/slurm.rb', line 212

def squeue_required_fields
  #TODO: does this need to include ::array_job_task_id?
  #TODO: does it matter that order of the output can vary depending on the arguments and if "squeue_required_fields" are included?
  # previously the order was "fields.keys"; i don't think it does
  [:job_id, :state_compact]
end

#submit_string(str, args: [], env: {}) ⇒ String

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Submit a script expanded as a string to the batch server

Parameters:

  • str (#to_s) —

    script as a string

  • args (Array<#to_s>) (defaults to: []) —

    arguments passed to `sbatch` command

  • env (Hash{#to_s => #to_s}) (defaults to: {}) —

    environment variables set

Returns:

  • (String) —

    the id of the job that was created

Raises:

  • (Error) —

    if `sbatch` command exited unsuccessfully



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# File 'lib/ood_core/job/adapters/slurm.rb', line 264

def submit_string(str, args: [], env: {})
  args = args.map(&:to_s) + ["--parsable"]
  env = env.to_h.each_with_object({}) { |(k, v), h| h[k.to_s] = v.to_s }
  call("sbatch", *args, env: env, stdin: str.to_s).strip.split(";").first
end