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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/filedistribution/model/zkfacade.h>
#include <vespa/filedistribution/model/filedistributionmodel.h>
#include <vespa/filedistribution/model/filedistributionmodelimpl.h>
#include <zookeeper/zookeeper.h>
#include <boost/program_options.hpp>
#include <vespa/log/log.h>
#include <iostream>
#include <map>
#include <thread>
LOG_SETUP("status-filedistribution");
using namespace filedistribution;
using namespace std::literals;
namespace po = boost::program_options;
std::string
plural(size_t size)
{
if (size == 1)
return "";
else
return "s";
}
template <class CONT>
std::string
plural(const CONT& cont)
{
size_t size = cont.size();
return plural(size);
}
typedef FileDBModel::HostStatus HostStatus;
typedef std::map<std::string, HostStatus> StatusByHostName;
void
printWaitingForHosts(const StatusByHostName& notFinishedHosts)
{
std::cout <<"Waiting for the following host" <<plural(notFinishedHosts) <<":" <<std::endl;
for (const StatusByHostName::value_type & hostNameAndStatus : notFinishedHosts) {
std::cout <<hostNameAndStatus.first <<" (";
const HostStatus& hostStatus = hostNameAndStatus.second;
if (hostStatus._state == HostStatus::notStarted) {
std::cout <<"Not started";
} else {
std::cout <<"Downloading, "
<<hostStatus._numFilesFinished <<"/" <<hostStatus._numFilesToDownload
<<" file" <<plural(hostStatus._numFilesToDownload) <<" completed";
}
std::cout <<")" <<std::endl;
}
}
//TODO:refactor
int printStatus(const std::string& zkservers)
{
std::shared_ptr<ZKFacade> zk(new ZKFacade(zkservers, true));
std::shared_ptr<FileDBModel> model(new ZKFileDBModel(zk));
std::vector<std::string> hosts = model->getHosts();
StatusByHostName notFinishedHosts;
StatusByHostName finishedHosts;
bool hasStarted = false;
for (const std::string & host : hosts) {
HostStatus hostStatus = model->getHostStatus(host);
switch (hostStatus._state) {
case HostStatus::finished:
hasStarted = true;
finishedHosts[host] = hostStatus;
break;
case HostStatus::inProgress:
hasStarted = true;
[[fallthrough]];
case HostStatus::notStarted:
notFinishedHosts[host] = hostStatus;
break;
}
}
if (notFinishedHosts.empty()) {
std::cout <<"Finished distributing files to all hosts." <<std::endl;
return 0;
} else if (!hasStarted) {
std::cout <<"File distribution has not yet started." <<std::endl;
return 0;
} else {
printWaitingForHosts(notFinishedHosts);
return 5;
}
}
int
printStatusRetryIfZKProblem(const std::string& zkservers, const std::string& zkLogFile)
{
FILE* file = fopen(zkLogFile.c_str(), "w");
if (file == NULL) {
std::cerr <<"Could not open file " <<zkLogFile <<std::endl;
} else {
zoo_set_log_stream(file);
}
zoo_set_debug_level(ZOO_LOG_LEVEL_ERROR);
for (int i = 0; i < 5; ++i) {
try {
return printStatus(zkservers);
} catch (ZKNodeDoesNotExistsException& e) {
LOG(debug, "Node does not exists, assuming concurrent update. %s", e.what());
} catch (ZKSessionExpired& e) {
LOG(debug, "Session expired.");
}
std::this_thread::sleep_for(500ms);
}
return 4;
}
//TODO: move to common
struct ProgramOptionException {
std::string _msg;
ProgramOptionException(const std::string & msg)
: _msg(msg)
{}
};
bool exists(const std::string& optionName, const po::variables_map& map) {
return map.find(optionName) != map.end();
}
void ensureExists(const std::string& optionName, const po::variables_map& map) {
if (!exists(optionName, map)) {
throw ProgramOptionException("Error: Missing option " + optionName);
}
}
//END: move to common
int
main(int argc, char** argv) {
const char
*zkstring = "zkstring",
*zkLogFile = "zkLogFile",
*help = "help";
po::options_description description;
description.add_options()
(zkstring, po::value<std::string > (), "The zookeeper servers to connect to, separated by comma")
(zkLogFile, po::value<std::string >() -> default_value("/dev/null"), "Zookeeper log file")
(help, "help");
try {
po::variables_map values;
po::store(po::parse_command_line(argc, argv, description), values);
if (exists(help, values)) {
std::cout <<description;
return 0;
}
ensureExists(zkstring, values);
return printStatusRetryIfZKProblem(
values[zkstring] .as<std::string>(),
values[zkLogFile].as<std::string>());
} catch (const ProgramOptionException& e) {
std::cerr <<e._msg <<std::endl;
return 3;
} catch(const std::exception& e) {
std::cerr <<"Error: " <<e.what() <<std::endl;
return 3;
}
}
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