Module: DeadBro::Collectors::Filesystem

Defined in:
lib/dead_bro/collectors/filesystem.rb

Overview

Filesystem collector exposes disk usage information using a best-effort approach. It prefers Ruby or Sys::Filesystem APIs when available and falls back to parsing ‘df` output.

Class Method Summary collapse

Class Method Details

.collect ⇒ Object 



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# File 'lib/dead_bro/collectors/filesystem.rb', line 14

def collect
  paths = disk_paths
  return {paths: []} if paths.nil? || paths.empty?

  {
    paths: paths.map { |path| stats_for_path(path) }.compact
  }
rescue => e
  {
    error_class: e.class.name,
    error_message: e.message.to_s[0, 500]
  }
end

.df_stats(path) ⇒ Object 



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# File 'lib/dead_bro/collectors/filesystem.rb', line 60

def df_stats(path)
  # Use POSIX df when available. Output format varies slightly by platform,
  # but we only depend on total and available in blocks.
  output = `df -k #{Shellwords.escape(path)} 2>/dev/null`
  lines = output.to_s.split("\n")
  return nil if lines.size < 2

  lines[0]
  data = lines[1]
  parts = data.split
  # POSIX df: Filesystem 1K-blocks Used Available Use% Mounted on
  total_kb = begin
    Integer(parts[1])
  rescue
    nil
  end
  avail_kb = begin
    Integer(parts[3])
  rescue
    nil
  end
  return nil unless total_kb && avail_kb

  {
    path: path,
    disk_total_bytes: total_kb * 1024,
    disk_free_bytes: avail_kb * 1024,
    disk_available_bytes: avail_kb * 1024
  }
rescue
  nil
end

.disk_paths ⇒ Object 



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# File 'lib/dead_bro/collectors/filesystem.rb', line 28

def disk_paths
  if DeadBro.configuration.respond_to?(:disk_paths)
    DeadBro.configuration.disk_paths || ["/"]
  else
    ["/"]
  end
rescue
  ["/"]
end

.stats_for_path(path) ⇒ Object 



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# File 'lib/dead_bro/collectors/filesystem.rb', line 38

def stats_for_path(path)
  if defined?(Sys::Filesystem)
    sys_filesystem_stats(path)
  else
    df_stats(path)
  end
rescue
  nil
end

.sys_filesystem_stats(path) ⇒ Object 



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# File 'lib/dead_bro/collectors/filesystem.rb', line 48

def sys_filesystem_stats(path)
  stat = Sys::Filesystem.stat(path)
  {
    path: path,
    disk_total_bytes: stat.blocks * stat.block_size,
    disk_free_bytes: stat.blocks_available * stat.block_size,
    disk_available_bytes: stat.blocks_available * stat.block_size
  }
rescue
  nil
end