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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright (c) 2014-2015, NORDUnet A/S.
# See LICENSE for licensing information.
import sys
import base64
import select
from time import sleep
from certtools import timing_point, build_merkle_tree, write_file, \
create_ssl_context
from mergetools import chunks, backup_sendlog, get_logorder, \
get_verifiedsize, get_missingentriesforbackup, read_chain, \
hexencode, setverifiedsize, sendentry_merge, verifyroot, \
get_nfetched, parse_args
def merge_backup(args, config, localconfig):
paths = localconfig["paths"]
own_key = (localconfig["nodename"],
"%s/%s-private.pem" % (paths["privatekeys"],
localconfig["nodename"]))
secondaries = config.get("mergenodes", [])
mergedb = paths["mergedb"]
chainsdir = mergedb + "/chains"
logorderfile = mergedb + "/logorder"
currentsizefile = mergedb + "/fetched"
timing = timing_point()
nfetched = get_nfetched(currentsizefile, logorderfile)
logorder = get_logorder(logorderfile, nfetched)
tree_size = len(logorder)
timing_point(timing, "get logorder")
tree = build_merkle_tree(logorder)
root_hash = tree[-1][0]
timing_point(timing, "build tree")
for secondary in secondaries:
if secondary["name"] == config["primarymergenode"]:
continue
nodeaddress = "https://%s/" % secondary["address"]
nodename = secondary["name"]
timing = timing_point()
print >>sys.stderr, "backing up to node", nodename
sys.stderr.flush()
verifiedsize = get_verifiedsize(nodename, nodeaddress, own_key, paths)
timing_point(timing, "get verified size")
print >>sys.stderr, "verified size", verifiedsize
sys.stderr.flush()
entries = [base64.b64encode(entry) for entry in logorder[verifiedsize:]]
print >>sys.stderr, "sending log:",
sys.stderr.flush()
for chunk in chunks(entries, 1000):
for trynumber in range(5, 0, -1):
sendlogresult = \
backup_sendlog(nodename, nodeaddress, own_key, paths,
{"start": verifiedsize, "hashes": chunk})
if sendlogresult == None:
if trynumber == 1:
sys.exit(1)
select.select([], [], [], 10.0)
print >>sys.stderr, "tries left:", trynumber
sys.stderr.flush()
continue
break
if sendlogresult["result"] != "ok":
print >>sys.stderr, "backup_sendlog:", sendlogresult
sys.exit(1)
verifiedsize += len(chunk)
print >>sys.stderr, verifiedsize,
sys.stderr.flush()
print >>sys.stderr
timing_point(timing, "sendlog")
print >>sys.stderr, "log sent"
sys.stderr.flush()
missingentries = get_missingentriesforbackup(nodename, nodeaddress,
own_key, paths)
timing_point(timing, "get missing")
print >>sys.stderr, "missing entries:", len(missingentries)
sys.stderr.flush()
fetched_entries = 0
print >>sys.stderr, "fetching missing entries",
sys.stderr.flush()
for missingentry in missingentries:
ehash = base64.b64decode(missingentry)
sendentryresult = sendentry_merge(nodename, nodeaddress,
own_key, paths,
read_chain(chainsdir, ehash),
ehash)
if sendentryresult["result"] != "ok":
print >>sys.stderr, "sendentry_merge:", sendentryresult
sys.exit(1)
fetched_entries += 1
if fetched_entries % 1000 == 0:
print >>sys.stderr, fetched_entries,
sys.stderr.flush()
print >>sys.stderr
sys.stderr.flush()
timing_point(timing, "send missing")
verifyrootresult = verifyroot(nodename, nodeaddress, own_key, paths,
tree_size)
if verifyrootresult["result"] != "ok":
print >>sys.stderr, "verifyroot:", verifyrootresult
sys.exit(1)
secondary_root_hash = base64.b64decode(verifyrootresult["root_hash"])
if root_hash != secondary_root_hash:
print >>sys.stderr, "secondary root hash was", \
hexencode(secondary_root_hash)
print >>sys.stderr, " expected", hexencode(root_hash)
sys.exit(1)
timing_point(timing, "verifyroot")
setverifiedsize(nodename, nodeaddress, own_key, paths, tree_size)
backuppath = mergedb + "/verified." + nodename
backupdata = {"tree_size": tree_size,
"sha256_root_hash": hexencode(root_hash)}
print >>sys.stderr, "DEBUG: writing to", backuppath, ":", backupdata
write_file(backuppath, backupdata)
if args.timing:
print >>sys.stderr, timing["deltatimes"]
sys.stderr.flush()
def main():
"""
Read logorder file up until what's indicated by fetched file and
build the tree.
Distribute entries to all secondaries, write tree size and tree head
to backup.<secondary> files as each secondary is verified to have
the entries.
Sleep some and start over.
"""
args, config, localconfig = parse_args()
paths = localconfig["paths"]
create_ssl_context(cafile=paths["https_cacertfile"])
while True:
merge_backup(args, config, localconfig)
if args.interval is None:
break
print >>sys.stderr, "sleeping", args.interval, "seconds"
sleep(args.interval)
if __name__ == '__main__':
sys.exit(main())
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