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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright (c) 2014-2015, NORDUnet A/S.
# See LICENSE for licensing information.
#
# Fetch new entries from all storage nodes.
# See catlfish/doc/merge.txt for more about the merge process.
#
import sys
import struct
import subprocess
import logging
from time import sleep
from mergetools import get_logorder, verify_entry, get_new_entries, \
chunks, fsync_logorder, get_entries, add_to_logorder, \
hexencode, parse_args, perm, flock_ex_or_fail, Status
from certtools import timing_point, write_file, create_ssl_context
def merge_fetch(args, config, localconfig):
paths = localconfig["paths"]
storagenodes = config["storagenodes"]
mergedb = paths["mergedb"]
logorderfile = mergedb + "/logorder"
statusfile = mergedb + "/merge_fetch.status"
s = Status(statusfile)
chainsdb = perm(localconfig.get("dbbackend", "filedb"), mergedb + "/chains")
own_key = (localconfig["nodename"],
"%s/%s-private.pem" % (paths["privatekeys"],
localconfig["nodename"]))
timing = timing_point()
logorder = get_logorder(logorderfile)
timing_point(timing, "get logorder")
certsinlog = set(logorder)
new_entries_per_node = {}
new_entries = set()
entries_to_fetch = {}
for storagenode in storagenodes:
logging.info("getting new entries from %s", storagenode["name"])
new_entries_per_node[storagenode["name"]] = \
set(get_new_entries(storagenode["name"],
"https://%s/" % storagenode["address"],
own_key, paths))
new_entries.update(new_entries_per_node[storagenode["name"]])
entries_to_fetch[storagenode["name"]] = []
timing_point(timing, "get new entries")
new_entries -= certsinlog
logging.info("adding %d entries", len(new_entries))
for ehash in new_entries:
for storagenode in storagenodes:
if ehash in new_entries_per_node[storagenode["name"]]:
entries_to_fetch[storagenode["name"]].append(ehash)
break
verifycert = subprocess.Popen(
[paths["verifycert_bin"], paths["known_roots"]],
stdin=subprocess.PIPE, stdout=subprocess.PIPE)
added_entries = 0
for storagenode in storagenodes:
nentries = len(entries_to_fetch[storagenode["name"]])
logging.info("getting %d entries from %s", nentries, storagenode["name"])
for chunk in chunks(entries_to_fetch[storagenode["name"]], 100):
entries = get_entries(storagenode["name"],
"https://%s/" % storagenode["address"],
own_key, paths, chunk)
for ehash in chunk:
entry = entries[ehash]
verify_entry(verifycert, entry, ehash)
chainsdb.add(ehash, entry)
add_to_logorder(logorderfile, ehash)
logorder.append(ehash)
certsinlog.add(ehash)
added_entries += 1
s.status("INFO: getting %d entries from %s: %d" %
(nentries, storagenode["name"], added_entries))
chainsdb.commit()
fsync_logorder(logorderfile)
timing_point(timing, "add entries")
logging.info("added %d entries", added_entries)
verifycert.communicate(struct.pack("I", 0))
if args.timing:
logging.debug("timing: merge_fetch: %s", timing["deltatimes"])
tree_size = len(logorder)
if tree_size == 0:
return (0, '')
else:
return (tree_size, logorder[tree_size-1])
def main():
"""
Fetch new entries from all storage nodes, in sequence.
Indicate the current position by writing the hash and its 'logorder'
index, 0-based, to 'fetched'.
Sleep some and start over, or exit if there's no `--mergeinterval'.
"""
args, config, localconfig = parse_args()
paths = localconfig["paths"]
mergedb = paths["mergedb"]
currentsizefile = mergedb + "/fetched"
lockfile = mergedb + "/.merge_fetch.lock"
loglevel = getattr(logging, args.loglevel.upper())
if args.mergeinterval is None:
logging.basicConfig(level=loglevel)
else:
logging.basicConfig(filename=args.logdir + "/merge_fetch.log",
level=loglevel)
if not flock_ex_or_fail(lockfile):
logging.critical("unable to take lock %s", lockfile)
return 1
create_ssl_context(cafile=paths["https_cacertfile"])
while True:
logsize, last_hash = merge_fetch(args, config, localconfig)
currentsize = {"index": logsize - 1, "hash": hexencode(last_hash)}
logging.debug("writing to %s: %s", currentsizefile, currentsize)
write_file(currentsizefile, currentsize)
if args.mergeinterval is None:
break
logging.debug("sleeping %d seconds", args.mergeinterval / 10)
sleep(args.mergeinterval / 10)
return 0
if __name__ == '__main__':
sys.exit(main())
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