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/**
* Copyright (C) 2015 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kReplication
#include "mongo/platform/basic.h"
#include "mongo/db/repl/repl_set_html_summary.h"
#include <sstream>
#include <string>
#include "mongo/util/mongoutils/html.h"
#include "mongo/util/mongoutils/str.h"
namespace mongo {
namespace repl {
ReplSetHtmlSummary::ReplSetHtmlSummary() : _selfIndex(-1), _primaryIndex(-1), _selfUptime(0) {}
namespace {
/**
* Turns an unsigned int representing a duration of time in milliseconds and turns it into
* a human readable time string representation.
*/
std::string ago(unsigned int duration) {
std::stringstream s;
if (duration < 180) {
s << duration << " sec";
if (duration != 1)
s << 's';
} else if (duration < 3600) {
s.precision(2);
s << duration / 60.0 << " mins";
} else {
s.precision(2);
s << duration / 3600.0 << " hrs";
}
return s.str();
}
unsigned int timeDifference(Date_t now, Date_t past) {
return static_cast<unsigned int>(past != Date_t() ? durationCount<Seconds>(now - past) : 0);
}
std::string stateAsHtml(const MemberState& s) {
using namespace html;
if (s.s == MemberState::RS_STARTUP)
return a("", "server still starting up, or still trying to initiate the set", "STARTUP");
if (s.s == MemberState::RS_PRIMARY)
return a("", "this server thinks it is primary", "PRIMARY");
if (s.s == MemberState::RS_SECONDARY)
return a("", "this server thinks it is a secondary (slave mode)", "SECONDARY");
if (s.s == MemberState::RS_RECOVERING)
return a("",
"recovering/resyncing; after recovery usually auto-transitions to secondary",
"RECOVERING");
if (s.s == MemberState::RS_STARTUP2)
return a("", "loaded config, still determining who is primary", "STARTUP2");
if (s.s == MemberState::RS_ARBITER)
return a("", "this server is an arbiter only", "ARBITER");
if (s.s == MemberState::RS_DOWN)
return a("", "member is down, slow, or unreachable", "DOWN");
if (s.s == MemberState::RS_ROLLBACK)
return a("", "rolling back operations to get in sync", "ROLLBACK");
if (s.s == MemberState::RS_UNKNOWN)
return a("", "we do not know what state this node is in", "UNKNOWN");
if (s.s == MemberState::RS_REMOVED)
return a("", "this server has been removed from the replica set config", "ROLLBACK");
return "";
}
}
const std::string ReplSetHtmlSummary::toHtmlString() const {
using namespace html;
std::stringstream s;
if (!_config.isInitialized()) {
s << p("Still starting up, or else replset is not yet initiated.");
return s.str();
}
if (_selfIndex < 0) {
s << p(
"This node is not a member of its replica set configuration, it most likely was"
" removed recently");
return s.str();
}
int votesUp = 0;
int totalVotes = 0;
// Build table of node information.
std::stringstream memberTable;
const char* h[] = {
"Member",
"<a title=\"member id in the replset config\">id</a>",
"Up",
"<a title=\"length of time we have been continuously connected to the other member "
"with no reconnects (for self, shows uptime)\">cctime</a>",
"<a title=\"when this server last received a heartbeat response - includes error code "
"responses\">Last heartbeat</a>",
"Votes",
"Priority",
"State",
"Messages",
"<a title=\"how up to date this server is. this value polled every few seconds so "
"actually lag is typically lower than value shown here.\">optime</a>",
0};
memberTable << table(h);
for (int i = 0; i < _config.getNumMembers(); ++i) {
const MemberConfig& memberConfig = _config.getMemberAt(i);
const MemberData& memberHB = _memberData[i];
bool isSelf = _selfIndex == i;
bool up = memberHB.getHealth() > 0;
totalVotes += memberConfig.getNumVotes();
if (up || isSelf) {
votesUp += memberConfig.getNumVotes();
}
memberTable << tr();
if (isSelf) {
memberTable << td(memberConfig.getHostAndPort().toString() + " (me)");
memberTable << td(memberConfig.getId());
memberTable << td("1"); // up
memberTable << td(ago(_selfUptime));
memberTable << td(""); // last heartbeat
memberTable << td(std::to_string(memberConfig.getNumVotes()));
memberTable << td(std::to_string(memberConfig.getPriority()));
memberTable << td(stateAsHtml(_selfState) +
(memberConfig.isHidden() ? " (hidden)" : ""));
memberTable << td(_selfHeartbeatMessage);
memberTable << td(_selfOptime.toString());
} else {
std::stringstream link;
link << "http://" << memberConfig.getHostAndPort().host() << ':'
<< (memberConfig.getHostAndPort().port() + 1000) << "/_replSet";
memberTable << td(a(link.str(), "", memberConfig.getHostAndPort().toString()));
memberTable << td(memberConfig.getId());
memberTable << td(red(str::stream() << memberHB.getHealth(), !up));
const unsigned int uptime = timeDifference(_now, memberHB.getUpSince());
memberTable << td(ago(uptime));
if (memberHB.getLastHeartbeat() == Date_t()) {
memberTable << td("never");
} else {
memberTable << td(ago(timeDifference(_now, memberHB.getLastHeartbeat())));
}
memberTable << td(std::to_string(memberConfig.getNumVotes()));
memberTable << td(std::to_string(memberConfig.getPriority()));
std::string state =
memberHB.getState().toString() + (memberConfig.isHidden() ? " (hidden)" : "");
if (up) {
memberTable << td(state);
} else {
memberTable << td(grey(str::stream() << "(was " << state << ')', true));
}
memberTable << td(grey(memberHB.getLastHeartbeatMsg(), !up));
// TODO(dannenberg): change timestamp to optime in V1
memberTable << td(memberHB.getLastHeartbeat() == Date_t()
? "?"
: memberHB.getHeartbeatAppliedOpTime().toString());
}
memberTable << _tr();
}
memberTable << _table();
s << table(0, false);
s << tr("Set name:", _config.getReplSetName());
bool majorityUp = votesUp * 2 > totalVotes;
s << tr("Majority up:", majorityUp ? "yes" : "no");
const MemberConfig& selfConfig = _config.getMemberAt(_selfIndex);
if (_primaryIndex >= 0 && _primaryIndex != _selfIndex && !selfConfig.isArbiter()) {
int lag = _memberData[_primaryIndex].getHeartbeatAppliedOpTime().getTimestamp().getSecs() -
_selfOptime.getTimestamp().getSecs();
s << tr("Lag: ", str::stream() << lag << " secs");
}
s << _table();
s << memberTable.str();
return s.str();
}
} // namespace repl
} // namespace mongo
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