6b556859ce
From system.membership we can find out what server exist in the
cluster while system.nodeinfo contains information about those
servers. If a node goes down, it will disappear from system.nodeinfo,
but not from system.membership. Consequently, we must start from
system.membership and then fetch more information from system.nodeinfo.
Incidentally, a query like
SELECT ms.nid, ni.iface_ip
FROM system.membership AS ms
LEFT JOIN system.nodeinfo AS ni ON ms.nid=ni.nodeid;
should provide all information in one go, but it seems that such joins
are not supported on the system tables.
89 lines
1.8 KiB
C++
89 lines
1.8 KiB
C++
/*
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* Copyright (c) 2018 MariaDB Corporation Ab
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*
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* Use of this software is governed by the Business Source License included
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* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
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*
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* Change Date: 2022-01-01
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*
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* On the date above, in accordance with the Business Source License, use
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* of this software will be governed by version 2 or later of the General
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* Public License.
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*/
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#include "clustrix.hh"
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#include <maxbase/assert.h>
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namespace
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{
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const char CN_NORMAL[] = "normal";
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const char CN_QUORUM[] = "quorum";
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const char CN_STATIC[] = "static";
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const char CN_UNKNOWN[] = "unknown";
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}
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std::string Clustrix::to_string(Clustrix::Status status)
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{
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switch (status)
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{
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case Status::QUORUM:
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return CN_QUORUM;
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case Status::STATIC:
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return CN_STATIC;
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case Status::UNKNOWN:
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return CN_UNKNOWN;
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}
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mxb_assert(!true);
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return CN_UNKNOWN;
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}
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Clustrix::Status Clustrix::status_from_string(const std::string& status)
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{
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if (status == CN_QUORUM)
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{
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return Status::QUORUM;
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}
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else if (status == CN_STATIC)
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{
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return Status::STATIC;
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}
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else
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{
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MXB_WARNING("'%s' is an unknown status for a Clustrix node.", status.c_str());
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return Status::UNKNOWN;
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}
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}
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std::string Clustrix::to_string(Clustrix::SubState substate)
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{
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switch (substate)
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{
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case SubState::NORMAL:
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return CN_NORMAL;
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case SubState::UNKNOWN:
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return CN_UNKNOWN;
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}
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mxb_assert(!true);
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return CN_UNKNOWN;
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}
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Clustrix::SubState Clustrix::substate_from_string(const std::string& substate)
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{
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if (substate == CN_NORMAL)
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{
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return SubState::NORMAL;
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}
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else
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{
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MXB_WARNING("'%s' is an unknown sub-state for a Clustrix node.", substate.c_str());
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return SubState::UNKNOWN;
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}
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}
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