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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include "CrushLocation.h"
#include <vector>
#include <boost/algorithm/string/trim.hpp>
#include <seastar/util/process.hh>
#include <seastar/util/later.hh>
#include "crush/CrushWrapper.h"
#include "crimson/common/log.h"
#include "crimson/common/config_proxy.h"
static seastar::logger& logger() {
return crimson::get_logger(ceph_subsys_crush);
}
using namespace crimson::common;
namespace crimson::crush {
seastar::future<> CrushLocation::update_from_conf()
{
auto crush_location = local_conf().get_val<std::string>("crush_location");
if (crush_location.length()) {
_parse(crush_location);
}
return seastar::now();
}
void CrushLocation::_parse(const std::string& s)
{
std::multimap<std::string, std::string> new_crush_location;
std::vector<std::string> lvec;
get_str_vec(s, ";, \t", lvec);
int r = CrushWrapper::parse_loc_multimap(lvec, &new_crush_location);
if (r < 0) {
logger().error("CrushWrapper::parse_loc_multimap error, keeping original\
crush_location {}", *this);
return;
}
loc.swap(new_crush_location);
logger().info("{}: crush_location is {}", __func__, *this);
return;
}
seastar::future<> CrushLocation::update_from_hook()
{
auto crush_location_hook = local_conf().get_val<std::string>("crush_location_hook");
if (crush_location_hook.length() == 0)
return seastar::now();
return seastar::file_exists(
crush_location_hook
).then([this] (bool result) {
if (!result) {
std::stringstream errmsg;
errmsg << "the user define crush location hook: "
<< local_conf().get_val<std::string>("crush_location_hook")
<< " is not exists.";
logger().error("{}", errmsg.str());
throw std::runtime_error(errmsg.str());
}
return seastar::file_accessible(
local_conf().get_val<std::string>("crush_location_hook"),
seastar::access_flags::execute
).then([this] (bool result) {
if (!result) {
std::stringstream errmsg;
errmsg << "the user define crush location hook: "
<< local_conf().get_val<std::string>("crush_location_hook")
<< " is not executable.";
logger().error("{}", errmsg.str());
throw std::runtime_error(errmsg.str());
}
seastar::experimental::spawn_parameters params = {
.argv = {
local_conf().get_val<std::string>("crush_location_hook"),
"--cluster",
local_conf()->cluster,
"--id",
local_conf()->name.get_id(),
"--type",
local_conf()->name.get_type_str()
}
};
return seastar::experimental::spawn_process(
local_conf().get_val<std::string>("crush_location_hook"),
std::move(params)
).then([this] (auto process) {
auto stdout = process.stdout();
return do_with(
std::move(process),
std::move(stdout),
[this](auto& process, auto& stdout)
{
return stdout.read().then([] (seastar::temporary_buffer<char> buf) {
auto out = std::string(buf.get(), buf.size());
boost::algorithm::trim_if(out, boost::algorithm::is_any_of(" \n\r\t"));
return seastar::make_ready_future<std::string>(std::move(out));
}).then([&process, this] (auto out) {
return process.wait(
).then([out = std::move(out), this] (auto wstatus) {
auto* exit_signal = std::get_if<seastar::experimental::process::wait_signaled>(&wstatus);
if (exit_signal != nullptr) {
std::stringstream errmsg;
errmsg << "the user define crush location hook: "
<< local_conf().get_val<std::string>("crush_location_hook")
<< " terminated, terminated signal is "
<< exit_signal->terminating_signal;
logger().error("{}", errmsg.str());
throw std::runtime_error(errmsg.str());
}
auto* exit_status = std::get_if<seastar::experimental::process::wait_exited>(&wstatus);
if (exit_status->exit_code != 0) {
std::stringstream errmsg;
errmsg << "the user define crush location hook: "
<< local_conf().get_val<std::string>("crush_location_hook")
<< " execute failed, exit_code is " << exit_status->exit_code;
logger().error("{}", errmsg.str());
throw std::runtime_error(errmsg.str());
} else {
_parse(out);
}
return seastar::now();
});
});
});
});
});
});
}
seastar::future<> CrushLocation::init_on_startup()
{
if (local_conf().get_val<std::string>("crush_location").length()) {
return update_from_conf();
}
if (local_conf().get_val<std::string>("crush_location_hook").length()) {
return update_from_hook();
}
// start with a sane default
char hostname[HOST_NAME_MAX + 1];
int r = gethostname(hostname, sizeof(hostname));
if (r < 0)
strcpy(hostname, "unknown_host");
// use short hostname
for (unsigned i=0; hostname[i]; ++i) {
if (hostname[i] == '.') {
hostname[i] = '\0';
break;
}
}
loc.clear();
loc.insert(std::make_pair<std::string, std::string>("host", hostname));
loc.insert(std::make_pair<std::string, std::string>("root", "default"));
return seastar::now();
}
std::multimap<std::string,std::string> CrushLocation::get_location() const
{
return loc;
}
std::ostream& operator<<(std::ostream& os, const CrushLocation& loc)
{
bool first = true;
for (auto& [type, pos] : loc.get_location()) {
if (first) {
first = false;
} else {
os << ", ";
}
os << '"' << type << '=' << pos << '"';
}
return os;
}
}
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