Prior to this patch, only db change aware connections were dropped on a read/write status change. However, current schema in OVN does not allow clients to monitor whether a particular DB changes this status. In order to accomplish this, we'd need to change the schema and adapting ovsdb-server and existing clients.
Before tackling that, this patch is changing ovsdb-server to drop *all* the existing connections upon a read/write status change. This will force clients to reconnect and honor the change. Reported-at: https://mail.openvswitch.org/pipermail/ovs-discuss/2019-July/048981.html Signed-off-by: Daniel Alvarez <dalva...@redhat.com> Signed-off-by: Ben Pfaff <b...@ovn.org> --- ovsdb/jsonrpc-server.c | 2 +- tests/ovn.at | 21 +++++++++++++++++++++ 2 files changed, 22 insertions(+), 1 deletion(-) diff --git a/ovsdb/jsonrpc-server.c b/ovsdb/jsonrpc-server.c index 7c7a277f0..739e0e72e 100644 --- a/ovsdb/jsonrpc-server.c +++ b/ovsdb/jsonrpc-server.c @@ -365,7 +365,7 @@ ovsdb_jsonrpc_server_set_read_only(struct ovsdb_jsonrpc_server *svr, { if (svr->read_only != read_only) { svr->read_only = read_only; - ovsdb_jsonrpc_server_reconnect(svr, false, + ovsdb_jsonrpc_server_reconnect(svr, true, xstrdup(read_only ? "making server read-only" : "making server read/write")); diff --git a/tests/ovn.at b/tests/ovn.at index 4b14720f3..291330b3b 100644 --- a/tests/ovn.at +++ b/tests/ovn.at @@ -12090,3 +12090,24 @@ ovn-nbctl list logical_switch_port ovn-nbctl list logical_router_port AT_CLEANUP + +# Run ovn-nbctl in daemon mode, change to a backup database and verify that +# an insert operation is not allowed. +AT_SETUP([ovn -- can't write to a backup database server instance]) +ovn_start +on_exit 'kill $(cat ovn-nbctl.pid)' +export OVN_NB_DAEMON=$(ovn-nbctl --pidfile --detach) + +AT_CHECK([ovn-nbctl ls-add sw0]) +as ovn-nb +AT_CHECK([ovs-appctl -t ovsdb-server ovsdb-server/sync-status | grep active | wc -l], [0], [1 +]) +ovs-appctl -t ovsdb-server ovsdb-server/set-active-ovsdb-server tcp:192.0.2.2:6641 +ovs-appctl -t ovsdb-server ovsdb-server/connect-active-ovsdb-server +AT_CHECK([ovs-appctl -t ovsdb-server ovsdb-server/sync-status | grep -c backup], [0], [1 +]) +AT_CHECK([ovn-nbctl ls-add sw1], [1], [ignore], +[ovn-nbctl: transaction error: {"details":"insert operation not allowed when database server is in read only mode","error":"not allowed"} +]) + +AT_CLEANUP -- _______________________________________________ dev mailing list d...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-dev
