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raft_store_snapshot() constructs a new snapshot in a local variable then
destroys the current snapshot and replaces it by the new one. Until now,
it has not cloned the data in the new snapshot until it did the
replacement. This led to the unexpected consequence that, if 'servers' in
the old and new snapshots was the same, then it would first be freed and
later cloned, which could cause a segfault.
Multiple people reported the crash. Gurucharan Shetty provided a
reproduction case.
Signed-off-by: Ben Pfaff <blp@ovn.org>
Acked-by: Mark Michelson <mmichels@redhat.com>
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I didn't realize until now that the tree had two different ways of parsing
strings in the form <host>:<port> and <port>:<host>. There are the
long-standing inet_parse_active() and inet_parse_passive() functions, and
more recently the ipv46_parse() function. This commit eliminates the
latter and changes the code to use the former.
The two implementations interpreted some input differently. In particular,
the older functions required IPv6 addresses to be [bracketed], but the
newer ones do not. For compatibility this patch changes the merged code to
use the more liberal interpretation.
Signed-off-by: Ben Pfaff <blp@ovn.org>
Acked-by: Mark Michelson <mmichels@redhat.com>
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This commit adds support for OVSDB clustering via Raft. Please read
ovsdb(7) for information on how to set up a clustered database. It is
simple and boils down to running "ovsdb-tool create-cluster" on one server
and "ovsdb-tool join-cluster" on each of the others and then starting
ovsdb-server in the usual way on all of them.
One you have a clustered database, you configure ovn-controller and
ovn-northd to use it by pointing them to all of the servers, e.g. where
previously you might have said "tcp:1.2.3.4" was the database server,
now you say that it is "tcp:1.2.3.4,tcp:5.6.7.8,tcp:9.10.11.12".
This also adds support for database clustering to ovs-sandbox.
Acked-by: Justin Pettit <jpettit@ovn.org>
Tested-by: aginwala <aginwala@asu.edu>
Signed-off-by: Ben Pfaff <blp@ovn.org>
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