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ttr.aws.utils.s3 0.4.0

Some command lines utilities to interact with files stored in AWS S3 incl. versioned ones.

Package Documentation

If you use AWS S3, then this can be handy tool for you.

This package offers few command line utilities, which allow a bit more, then scripts provided by boto.

Some special features:

  • List versions in defined time period, see versioning
  • Fetch versions specified in CSV file (list-file)
  • Generate temporary url links for set of keys in buckets

Installation

$ pip install ttr.aws.utils.s3

Other methods (easy_install, setup.py) work too.

Quick start

We want to fetch versions of feed in bucket mybucket named my/versioned/feed.xml

  1. Be sure, you have your BOTO credentials configured. You shall have file in form:

    [Credentials]
    aws_access_key_id = <your access key>
    aws_secret_access_key = <your secret key>
    

    somewhere, and have set variable BOTO_CONFIG to value of complete path to this file. For more see BotoConfig.

Note

There are alternative methods of specifying AWS credentials, described later on.

  1. create csv file for given feed and time period:

    $ s3lsvers -from 2012-05-24T00:15 -to 2012-05-24T01:15 -list-file list.csv mybucket my/versioned/feed.xml
    

    You shall then find file list.csv on your disk.

  2. Review records in list.csv and delete all lines with version, which are not of your interest.

  3. Using list.csv, ask s3getvers to fetch all versions specified in the file. Be sure to run it on empty directory:

    $ s3getvers mybucket list.csv
    

    You will see, how is each version downloaded and saved to your current directory.

  4. Finally, you can try generating temorary url to your feed (showing latest of versions):

    $ s3tmpgen mybucket my/versioned/feed.xml
    bucket_key_tmpurl:
      mybucket:
        my/versioned/feed.xml: https://mybucket.s3.amazonaws.com/my/versioned/feed.xml?Signature=o..A%3D&Expires=1342304229&AWSAccessKeyId=A....A
    expire: '2012-07-14T22:17:09Z'
    

Provided commands

s3lsvers

List versions of some feed. Could output into CSV file (-list-file) and/or html chart (-html-file).

$ s3lsvers -h
usage: s3lsvers [-h] [-from None] [-to None] [-list-file None] [-html-file None] [-version-id None] [-profile-name None] [-aws-access-key-id None] [-aws-secret-access-key None] bucket_key

Lists all versions of given key, possibly filtering by from - to range
    for version last_modified time.
    Allows to put the listing into csv file and or into html chart.

        Listing shows:
          key_name
            "file name". Can repeat if the file has more versions

          version_id
            unique identifier for given version on given bucket.  Has form of
            string and not a number. identifiers are "random", do not expect
            that they are sorten alphabetically.

          size
            size of file in bytes

          last_modified
            ISO 8601 formated time of file modification,
            e.g. `2011-06-22T03:05:09.000Z`

          age
            difference between last_modified or given version
            and preceding version. It is sort of current
            update interval for that version.

        Sample use:
        Lists to the screen all versions of file keyname in the
        bucketname bucket::

            $ s3lsvers bucketname/keyname

        Lists all versions younger then given time (from given time till now)::

            $ s3lsvers -from 2011-07-19T12:00:00 bucketname/keyname

        Lists all versions older then given time
        (from very first version till given date)::

            $ s3lsvers -to 2011-07-19T12:00:00 bucketname/keyname

        Lists all versions in period betwen from and to time::

            $ s3lsvers -from 2010-01-01 -to 2011-07-19T12:00:00             bucketname/keyname

        Lists all versions and writes them into csv file named versions.csv::

            $ s3lsvers -list-file versions.csv bucketname/keyname

        Lists all versions and writes them into html chart file
        named chart.html::

            $ s3lsvers -html-file chart.html bucketname/keyname

        Prints to screen, writes to csv, creates html chart and this all
        for versions in given time period.::

            $ s3lsvers -from 2010-01-01 -to 2011-07-19T12:00:00             -list-file versions.csv -html-file chart.html bucketname/keyname

        Using bucket/key_name aliases in .s3lsvers file

        Instead of using long bucket and key names on command line, you may define aliases.

        Aliases are specified in file .s3lsvers, which may be located in currect directory, home directory or /etc/s3lsvers"

        Content of .s3lsvers files may look like this::

            #.s3lsversrc - definition of some preconfigured bucket/key values
            [DEFAULT]
            pl-base: pl-base.dp.tamtamresearch.com
            cz-base: cz-base.dp.tamtamresearch.com
            sk-base: sk-base.dp.tamtamresearch.com

            #values left to ":" must not contain "/" to prevent confusion with real bucket names
            [aliases]
            plcsr: %(pl-base)s/region/pl/ConsumerServiceReady.xml
            pldfs: %(pl-base)s/region/pl/DataFusionService.xml
            czcsr: %(cz-base)s/region/cz/ConsumerServiceReady.xml
            czdfs: %(cz-base)s/region/cz/DataFusionService.xml
            skcsr: %(sk-base)s/region/sk/ConsumerServiceReady.xml
            skdfs: %(sk-base)s/region/sk/DataFusionService.xml
            skes: %(sk-base)s/region/sk/EventService.xml
            sksr: %(sk-base)s/region/sk/SummaryReports.xml

        The format follows SafeConfigParser rules: http://docs.python.org/2/library/configparser.html#safeconfigparser-objects



positional arguments:
  bucket_key            bucket_name/key_name for the key to list, or key alias defined in .s3lsvers file

optional arguments:
  -h, --help            show this help message and exit
  -from None, --from-time None
                        Modification time of oldest expected version as ISO 8601 format. Can be truncated. (default: goes to the oldest version)
  -to None, --to-time None
                        Modification time of youngest expected version as ISO 8601 format. Can be truncated. (default: goes to the latest version)
  -list-file None       Name of file, where is result written in csv format. If set, the file is always overwritten.
  -html-file None       Name of file, where is result written in html format (as a chart). If set, the file is always overwritten.
  -version-id None      Optional version-id. If specified, listing does not start from the freshest version, but starts searching from given VERSION_ID and continues searching older and older versions. This could speed up listng in
                        case, you need rather older files and you know VERSION_ID which came somehow later then is the time scope you are going to list.
  -profile-name None    Name of boto profile to use for credentials
  -aws-access-key-id None
                        Your AWS Access Key ID
  -aws-secret-access-key None
                        Your AWS Secret Access Key

s3getvers

$ s3getvers -h
usage: s3getvers [-h] [-output-version-id-names] [-no-decompression] [-profile-name None] [-aws-access-key-id None] [-aws-secret-access-key None] bucket_name csv_version_file

Fetch file versions as listed in provided csv file

    Typical csv file (as by default produced by s3lsvers) is:

        my/versioned/feed.xml;OrUr6XO8KSKEHbd8mQ.MloGcGlsh7Sir;191345;2012-05-23T20:45:10.000Z;39
        my/versioned/feed.xml;xhkVOy.dJfjSfUwse8tsieqjDicp0owq;192790;2012-05-23T20:44:31.000Z;62
        my/versioned/feed.xml;oKneK.N2wS8pW8.EmLqjldYlgcFwxN3V;193912;2012-05-23T20:43:29.000Z;58

    and has columns:
    :key_name: name of the feed (not containing the bucket name itself)
    :version_id: string, identifying unique version. Any following columns can contain anything.
    :size: size in bytes. This column is not used and can be missing.
    :last_modified: date, when the version was posted. This column is not used and can be missing.

    Typical use (assuming, above csv file is available under name verlist.csv)::

        $ s3getvers yourbucketname verlist.csv

    What will create following files in current directory:

    + my/versioned/feed.xml.2012-05-23T20_45_10.xml
    + my/versioned/feed.xml.2012-05-23T20_44_31.xml
    + my/versioned/feed.xml.2012-05-23T20_43_29.xml

    Even though these files are gzipped on server, they will be decompressed on local disk.



positional arguments:
  bucket_name           bucket name (default: None)
  csv_version_file      name of CSV file with version_id

optional arguments:
  -h, --help            show this help message and exit
  -output-version-id-names
                        Resulting file names shall use version_id to become distinguished (default is to use timestamp of file creation)
  -no-decompression     Keeps the files as they come, do not decompress, if they come compressed
  -profile-name None    Name of boto profile to use for credentials
  -aws-access-key-id None
                        Your AWS Access Key ID
  -aws-secret-access-key None
                        Your AWS Secret Access Key

s3tmpgen

$ s3tmpgen -h
usage: s3tmpgen [-h] [-profile-name None] [-aws-access-key-id None] [-aws-secret-access-key None] expire_dt bucket_name [key_names [key_names ...]]

Generate temporary url for accessing content of AWS S3 key with defined expiration date-time.

    Urls are printed one per line to stdout.

    For missing key names empty line is printed and error goes to stderr.


positional arguments:
  expire_dt             ISO formatted time of expiration, full seconds, 'Z' is obligatory, e.g. '2014-02-14T21:47:16Z'
  bucket_name           name of bucket
  key_names             key names to generate tmpurl for

optional arguments:
  -h, --help            show this help message and exit
  -profile-name None    Name of boto profile to use for credentials
  -aws-access-key-id None
                        Your AWS Access Key ID
  -aws-secret-access-key None
                        Your AWS Secret Access Key

Configuring AWS S3 credentials

There are multiple methods for specifying AWS credentials

  • access key and secret key on command line
  • access key and secret key set as environmental variables AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY
  • boto config file in default location
  • boto config file in alternate location pointed to by variable BOTO_CONFIG
  • using profile name of boto config section

Details are described at BotoConfig.

The most stright-forward way of setting these variables is to create ini file in boto format as follows:

[Credentials]
aws_access_key_id = <your_access_key_here>
aws_secret_access_key = <your_secret_key_here>

Name of the file may be arbitrary if you then ensure, environmental variable BOTO_CONFIG has value with complete path to that file.

In case, you use multiple AWS identities, add profile sections to boto ini file:

[Credentials]
aws_access_key_id = <your default access key>
aws_secret_access_key = <your default secret key>

[profile jekyl]
aws_access_key_id = <jekyl access key for this profile>
aws_secret_access_key = <jekyl secret key for this profile>

[profile hyde]
aws_access_key_id = <hyde access key for this profile>
aws_secret_access_key = <hyde secret key for this profile>

and use switch -profile when calling the commands.

Credits

This work is built on top of boto module, great Python library for accessing AWS services created by Mitch Garnaat .

Copyright © 2011, Jan Vlcinsky

Copyright © 2012-2014, TamTam Research s.r.o. http://www.tamtamresearch.com

All rights reserved.

News

O.4.0

Release date: 2014-02-18

  • Added options to specify AWS credentials via boto profile_name (boto>=2.25.0) or explicit id and secret key
  • s3tmpgen - complete rewrite, simplified and finally it works
  • Removed buildout installation method.

0.3.0

Release date: 2012-06-15

  • command s3tmpgen - generating temporary urls for selected keys in buckets

0.2.3

Release date: 2012-05-28

  • command s3lsvers - to list key versions
  • command s3getvers - to fetch versions listed in csv file
 
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