discourse/lib/disk_space.rb

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class DiskSpace
extend ActionView::Helpers::NumberHelper
def self.uploads_used_bytes
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# used(uploads_path)
# temporary (on our internal setup its just too slow to iterate)
Upload.sum(:filesize).to_i
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end
def self.uploads_free_bytes
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free(uploads_path)
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end
def self.backups_used_bytes
used(backups_path)
end
def self.backups_free_bytes
free(backups_path)
end
def self.backups_path
Backup.base_directory
end
def self.uploads_path
"#{Rails.root}/public/uploads/#{RailsMultisite::ConnectionManagement.current_db}"
end
def self.stats
{
uploads_used: number_to_human_size(uploads_used_bytes),
uploads_free: number_to_human_size(uploads_free_bytes),
backups_used: number_to_human_size(backups_used_bytes),
backups_free: number_to_human_size(backups_free_bytes)
}
end
def self.cached_stats
stats = $redis.get('disk_space_stats')
updated_at = $redis.get('disk_space_stats_updated')
unless updated_at && (Time.now.to_i - updated_at.to_i) < 30.minutes
Scheduler::Defer.later "updated stats" do
$redis.set('disk_space_stats_updated', Time.now.to_i)
$redis.set('disk_space_stats', self.stats.to_json)
end
end
if stats
JSON.parse(stats)
end
end
protected
def self.free(path)
`df -Pk #{path} | awk 'NR==2 {print $4;}'`.to_i * 1024
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end
def self.used(path)
`du -s #{path}`.to_i * 1024
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end
end