e4adca0880
This adds a `parse-bucket-logs.{service,timer}`, running once every
night at 3AM UTC, figuring out the last time it was run and parsing
bucket logs for all previous days.
It invokes the `archeology-parse-bucket-logs` script to produce
a .parquet file with the bucket logs in `s3://nix-cache-log/log/` for
that day (inside a temporary directory), then on success uploads the
produced parquet file to
`s3://nix-archeologist/nix-cache-bucket-logs/yyyy-mm-dd.parquet`.
Change-Id: Ia75ca8c43f8074fbaa34537ffdba68350c504e52
Reviewed-on: https://cl.tvl.fyi/c/depot/+/10011
Reviewed-by: edef <edef@edef.eu>
Tested-by: BuildkiteCI
62 lines
2.1 KiB
Python
62 lines
2.1 KiB
Python
import boto3
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import datetime
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import os
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import re
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import subprocess
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import tempfile
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s3 = boto3.resource('s3')
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bucket_name = "nix-archeologist"
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prefix = "nix-cache-bucket-logs/"
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bucket = s3.Bucket(bucket_name)
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key_pattern = re.compile(r'.*\/(?P<y>\d{4})-(?P<m>\d{2})-(?P<d>\d{2})\.parquet$') # noqa: E501
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# get a listing (which is sorted), grab the most recent key
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last_elem = list(
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o for o in bucket.objects.filter(Prefix=prefix)
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if key_pattern.match(o.key)
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).pop()
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# extract the date of that key.
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m = key_pattern.search(last_elem.key)
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last_elem_date = datetime.date(int(m.group("y")), int(m.group("m")), int(m.group("d"))) # noqa: E501
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# get the current date (UTC)
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now = datetime.datetime.now(tz=datetime.UTC)
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now_date = datetime.date(now.year, now.month, now.day)
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while True:
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# Calculate what date would be processed next.
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next_elem_date = last_elem_date + datetime.timedelta(days=1)
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# If that's today, we don't want to process it.
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if next_elem_date == now_date:
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print("Caught up, would process data from today.")
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break
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# If we'd be processing data from yesterday, but it's right after midnight,
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# also don't process - data might still be flushed.
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if (next_elem_date + datetime.timedelta(days=1) == now_date) and now.hour == 0: # noqa: E501
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print("Not processing data from previous day right after midnight")
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break
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src = f"http://nix-cache-log.s3.amazonaws.com/log/{next_elem_date.isoformat()}-*" # noqa: E501
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# Invoke parse-bucket-logs script inside a tempdir and upload on success.
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with tempfile.TemporaryDirectory() as td:
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work_file_name = os.path.join(td, "output.parquet")
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args = ["archeology-parse-bucket-logs", src, work_file_name]
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subprocess.run(
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args,
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check=True # throw exception if nonzero exit code
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)
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dest_key = f"{prefix}{next_elem_date.isoformat()}.parquet"
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# Upload the file
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print(f"uploading to s3://{bucket_name}{dest_key}")
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bucket.upload_file(work_file_name, dest_key)
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last_elem_date = next_elem_date
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