1 Version 0.1.0 (Tue, 19 May 2009):
2 - Drop compatibility with Ganeti 1.2
3 - Add a new minimum score option (with a very low default), should
4 help with very good clusters (but is still not optimal)
5 - Add a --quiet option to hbal
6 - Add support for reading offline nodes directly from the cluster
8 Version 0.0.8 (Tue, 21 Apr 2009):
9 - hbal: prevent mismatches in wrong node names being passed to -O, by
11 - add the ability to write the commands (-C) to a script via (-C<file>), so
12 that it can be later executed directly; this has also changed the commands
13 to include the ncessary -f flags to skip confirmations
14 - add checks for extra argument in hbal and hn1, so that unintended errors
16 - raise the accepted “missing” memory limit to 512MB, to cover usual Xen
19 Version 0.0.7 (Mon, 23 Mar 2009):
20 - added support for offline nodes, which are not used as targets for
21 instance relocation and if they hold instances the hbal algorithm
22 will attempt to relocate these away
23 - added support for offline instances, which now will no longer skew
24 the free memory estimation of nodes; the algorithm will no longer
25 create conditions for N+1 failures when such instances are later
27 - implemented a complete model of node resources, in order to
28 prevent an unintended re-occurrence of cases like the offline
29 instance were we miscalculate some node resource; this gives warning
30 now in case the node reported free disk or free memory deviates by
31 more than a set amount from the expected value
32 - a new tool *hscan* that can generate the input text-file for the
33 other tools by collection via RAPI
34 - some small changes to the build system to make it more friendly;
35 also included the generated documentation in the source archive
37 Version 0.0.6 (Mon, 16 Mar 2009):
38 - re-factored the hbal algorithm to make it stable in the sense that it
39 gives the same solution when restarted from the middle; barring
40 rounding of disk/memory and incomplete reporting from Ganeti (for
41 1.2), it should be now feasible to rely on its output without
42 generating moves ad infinitum
43 - the hbal algorithm now uses two more variables: the node N+1
44 failures and the amount of reserved memory; the first of which tries
45 to ‘fix’ the N+1 status, the latter tries to distribute secondaries
47 - the hbal algorithm now uses two more moves at each step:
48 replace+failover and failover+replace (besides the original
49 failover, replace, and failover+replace+failover)
50 - slightly changed the build system to embed GIT version/tags into the
51 binaries so that we know for a binary from which tree it was done,
52 either via ‘--version’ or via “strings hbal|grep version”
53 - changed the solution list and in general the hbal output to be more
54 clear by default, and changed “gnt-instance failover” to
55 “gnt-instance migrate”
56 - added man pages for the two binaries
58 Version 0.0.5 (Mon, 09 Mar 2009):
59 - a few small improvements for hbal (possibly undone by later
60 changes), hbal is now quite faster
61 - fix documentation building
62 - allow hbal to work on non N+1 compliant clusters, but without
63 guarantees that the end cluster will be compliant; in any case, this
64 should give a smaller number of nodes that are not compliant if the
65 cluster state permits it
66 - strip common domain suffix from nodes and instances, so that output
67 is shorter and hopefully clearer
69 Version 0.0.4 (Sun, 15 Feb 2009):
70 - better balancing algorithm in hbal
71 - implemented an RAPI collector, now the cluster data can be gathered
72 automatically via RAPI and doesn't need manual export of node and
75 Version 0.0.3 (Wed, 28 Jan 2009):
76 - initial release of the hbal, a cluster rebalancing tool
77 - input data format changed due to hbal requirements
79 Version 0.0.2 (Tue, 06 Jan 2009):
80 - fix handling of some common cases (cluster N+1 compliant from the
81 start, too big depth given, failure to compute solution)
82 - add option to print the needed command list for reaching the
85 Version 0.0.1 (Tue, 06 Jan 2009):
86 - initial release of hn1 tool