From 9d7e596ba61a7a69d8c8b6e1ecba2d6a3ca430c7 Mon Sep 17 00:00:00 2001 From: Alexey Yurchenko Date: Sun, 5 Sep 2021 17:07:05 +0300 Subject: MDEV-26971: JSON file interface to wsrep node state. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Integration with status reporter in wsrep-lib. Status reporter reports changes in wsrep state and logged errors/ warnings to a json file which then can be read and interpreted by an external monitoring tool. Rationale: until the server is fully initialized it is unaccessible by client and the only source of information is an error log which is not machine-friendly. Since wsrep node can spend a very long time in initialization phase (state transfer), it may be a very long time that automatic tools can't easily monitor its liveness and progression. New variable: wsrep_status_file specifies the output file name. If not set, no file is created and no reporting is done. Reviewed-by: Jan Lindström --- sql/wsrep_status.h | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 sql/wsrep_status.h (limited to 'sql/wsrep_status.h') diff --git a/sql/wsrep_status.h b/sql/wsrep_status.h new file mode 100644 index 00000000000..1c99a4cfe88 --- /dev/null +++ b/sql/wsrep_status.h @@ -0,0 +1,61 @@ +/* Copyright 2021 Codership Oy + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; version 2 of the License. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ + +#ifndef WSREP_STATUS_H +#define WSREP_STATUS_H + +/* wsrep-lib */ +#include "wsrep/reporter.hpp" + +/* implementation */ +#include "wsrep_mutex.h" + +class Wsrep_status +{ +public: + static void init_once(const std::string& file_name); + static void destroy(); + + static void report_state(enum wsrep::server_state::state const state, + float const progress = wsrep::reporter::indefinite) + { + if (!Wsrep_status::m_instance) return; + + Wsrep_status::m_instance->report_state(state, progress); + } + + static void report_log_msg(wsrep::reporter::log_level level, + const char* tag, size_t tag_len, + const char* buf, size_t buf_len, + double const tstamp = wsrep::reporter::undefined); +// { +// if (!Wsrep_status::m_instance) return; +// +// Wsrep_status::m_instance->report_log_msg(level, msg, tstamp); +// } + + static bool is_instance_initialized() + { + return m_instance; + } + +private: + Wsrep_status(const std::string& file_name); + + static Wsrep_mutex* m_mutex; + static wsrep::reporter* m_instance; +}; + +#endif /* WSREP_STATUS_H */ -- cgit v1.2.1