This command will stop sending and receiving any RAFT-related traffic or accepting new connections. Useful to simulate network problems between cluster members.
There is no unit test that uses it yet, but it's convenient for manual testing. Signed-off-by: Ilya Maximets <[email protected]> --- ovsdb/raft.c | 31 +++++++++++++++++++++---------- 1 file changed, 21 insertions(+), 10 deletions(-) diff --git a/ovsdb/raft.c b/ovsdb/raft.c index 192f7f0a9..d2ff643b2 100644 --- a/ovsdb/raft.c +++ b/ovsdb/raft.c @@ -75,7 +75,8 @@ enum raft_failure_test { FT_CRASH_AFTER_SEND_EXEC_REQ, FT_CRASH_AFTER_RECV_APPEND_REQ_UPDATE, FT_DELAY_ELECTION, - FT_DONT_SEND_VOTE_REQUEST + FT_DONT_SEND_VOTE_REQUEST, + FT_STOP_RAFT_RPC, }; static enum raft_failure_test failure_test; @@ -1474,6 +1475,10 @@ raft_send_add_server_request(struct raft *raft, struct raft_conn *conn) static void raft_conn_run(struct raft *raft, struct raft_conn *conn) { + if (failure_test == FT_STOP_RAFT_RPC) { + return; + } + jsonrpc_session_run(conn->js); unsigned int new_seqno = jsonrpc_session_get_seqno(conn->js); @@ -1794,7 +1799,8 @@ static void raft_open_conn(struct raft *raft, const char *address, const struct uuid *sid) { if (strcmp(address, raft->local_address) - && !raft_find_conn_by_address(raft, address)) { + && !raft_find_conn_by_address(raft, address) + && failure_test != FT_STOP_RAFT_RPC) { raft_add_conn(raft, jsonrpc_session_open(address, true), sid, false); } } @@ -1870,7 +1876,7 @@ raft_run(struct raft *raft) free(paddr); } - if (raft->listener) { + if (raft->listener && failure_test != FT_STOP_RAFT_RPC) { struct stream *stream; int error = pstream_accept(raft->listener, &stream); if (!error) { @@ -1995,7 +2001,7 @@ raft_run(struct raft *raft) static void raft_wait_session(struct jsonrpc_session *js) { - if (js) { + if (js && failure_test != FT_STOP_RAFT_RPC) { jsonrpc_session_wait(js); jsonrpc_session_recv_wait(js); } @@ -2012,10 +2018,12 @@ raft_wait(struct raft *raft) raft_waiters_wait(raft); - if (raft->listener) { - pstream_wait(raft->listener); - } else { - poll_timer_wait_until(raft->listen_backoff); + if (failure_test != FT_STOP_RAFT_RPC) { + if (raft->listener) { + pstream_wait(raft->listener); + } else { + poll_timer_wait_until(raft->listen_backoff); + } } struct raft_conn *conn; @@ -4361,8 +4369,9 @@ raft_send_to_conn_at(struct raft *raft, const union raft_rpc *rpc, struct raft_conn *conn, int line_number) { log_rpc(rpc, "-->", conn, line_number); - return !jsonrpc_session_send( - conn->js, raft_rpc_to_jsonrpc(&raft->cid, &raft->sid, rpc)); + return failure_test == FT_STOP_RAFT_RPC + || !jsonrpc_session_send( + conn->js, raft_rpc_to_jsonrpc(&raft->cid, &raft->sid, rpc)); } static bool @@ -4856,6 +4865,8 @@ raft_unixctl_failure_test(struct unixctl_conn *conn OVS_UNUSED, } } else if (!strcmp(test, "dont-send-vote-request")) { failure_test = FT_DONT_SEND_VOTE_REQUEST; + } else if (!strcmp(test, "stop-raft-rpc")) { + failure_test = FT_STOP_RAFT_RPC; } else if (!strcmp(test, "clear")) { failure_test = FT_NO_TEST; unixctl_command_reply(conn, "test dismissed"); -- 2.26.2 _______________________________________________ dev mailing list [email protected] https://mail.openvswitch.org/mailman/listinfo/ovs-dev
