forked from TrueCloudLab/s3-tests
3a3cbb3d25
Script to generate garbage objects and push them to a bucket. Script takes a config file on the command line (and some other command line options using optparse) and generates a bunch of objects in an S3 bucket. Also prints public URLs to stdout. Number and sizes of the objects are determined by a yaml config file with each line looking like this: - [A, B, C] A: Number of files in this group B: Mean size of files in this group (in bytes) C: Standard deviation (normal distribution) of file sizes in this group command line options are: - S3 access key - S3 secret key - seed for PRNG - output file to write URLs to - flag to add md5 checksum to url list
124 lines
4 KiB
Python
Executable file
124 lines
4 KiB
Python
Executable file
#! /usr/bin/python
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from boto.s3.connection import OrdinaryCallingFormat
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from boto.s3.connection import S3Connection
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from boto.s3.key import Key
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from optparse import OptionParser
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from realistic import RandomContentFile
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import realistic
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import random
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import yaml
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import boto
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import sys
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DHO_HOST = 'objects.dreamhost.com'
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def parse_opts():
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parser = OptionParser();
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parser.add_option('-O' , '--outfile', help='write output to FILE. Defaults to STDOUT', metavar='FILE')
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parser.add_option('-a' , '--access-key', dest='access_key', help='use S3 access key KEY', metavar='KEY')
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parser.add_option('-s' , '--secret-key', dest='secret_key', help='use S3 secret key KEY', metavar='KEY')
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parser.add_option('-b' , '--bucket', dest='bucket', help='push objects to BUCKET', metavar='BUCKET')
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parser.add_option('--checksum', dest='checksum', action='store_true', help='include the md5 checksum with the object urls')
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parser.add_option('--host', dest='host', help='use S3 gateway at HOST', metavar='HOST')
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parser.add_option('--seed', dest='seed', help='optional seed for the random number generator')
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parser.set_defaults(host=DHO_HOST)
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return parser.parse_args()
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def parse_config(config_files):
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configurations = []
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for file in config_files:
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FILE = open(file, 'r')
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configurations = configurations + yaml.load(FILE.read())
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FILE.close()
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return configurations
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def get_bucket(conn, existing_bucket):
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if existing_bucket:
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return conn.get_bucket(existing_bucket)
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else:
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goop = '%x' % random.getrandbits(64)
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bucket = conn.create_bucket(goop)
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bucket.set_acl('public-read')
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return bucket
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def connect_s3(host, access_key, secret_key):
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conn = S3Connection(
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calling_format = OrdinaryCallingFormat(),
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is_secure = False,
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host = host,
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aws_access_key_id = access_key,
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aws_secret_access_key = secret_key)
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return conn
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def generate_objects(bucket, quantity, mean, stddev, seed, checksum=False):
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"""Generate random objects with sizes across a normal distribution
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specified by mean and standard deviation and write them to bucket.
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IN:
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boto S3 bucket object
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Number of files
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mean file size in bytes
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standard deviation from mean file size
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seed for RNG
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flag to tell the method to append md5 checksums to the output
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OUT:
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list of urls (strings) to objects valid for 1 hour.
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If "checksum" is true, each output string consists of the url
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followed by the md5 checksum.
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"""
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urls = []
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file_generator = realistic.files(mean, stddev, seed)
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name_generator = realistic.names(15, 4,seed=seed)
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for _ in xrange(quantity):
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fp = file_generator.next()
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print >> sys.stderr, 'sending file with size %dB' % fp.size
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key = Key(bucket)
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key.key = name_generator.next()
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key.set_contents_from_file(fp)
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url = key.generate_url(3600) #valid for 1 hour
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if checksum:
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url += ' %s' % key.md5
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urls.append(url)
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return urls
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def main():
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(options, args) = parse_opts();
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#SETUP
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random.seed(options.seed if options.seed else None)
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if options.outfile:
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OUTFILE = open(options.outfile, 'w')
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else:
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OUTFILE = sys.stdout
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conn = connect_s3(options.host, options.access_key, options.secret_key)
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bucket = get_bucket(conn, options.bucket)
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urls = []
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print >> OUTFILE, 'bucket: %s' % bucket.name
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print >> sys.stderr, 'setup complete, generating files'
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for profile in parse_config(args):
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seed = random.random()
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urls += generate_objects(bucket, profile[0], profile[1], profile[2], seed, options.checksum)
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print >> sys.stderr, 'finished sending files. Saving urls to S3'
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url_string = '\n'.join(urls)
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url_key = Key(bucket)
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url_key.key = 'urls'
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url_key.set_contents_from_string(url_string)
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print >> OUTFILE, url_string
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print >> sys.stderr, 'done'
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if __name__ == '__main__':
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main()
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