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ClickHouse/programs/install/Install.cpp
Azat Khuzhin 7fb31fe160 Remove ability to disable generic clickhouse components 
Components like client/server/... are very generic, and there is no
point in disabling them, since it does not reduce amount of compiled
code a lot anyway (just a few modules for entrypoints, everything else
is already included in the clickhouse binary), and eventually they are
just symlinks to the clickhouse binary.

But there are few, that requires extra libraries, like ODBC bridge or
keeper components (and there is also standalone keeper binary compiled
with musl), those had been kept.

Also add some descriptions for some utils and change exit code to 0 for
--help.

Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
2024-02-12 11:10:00 +01:00

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#include <iostream>
#include <filesystem>
#include <boost/program_options.hpp>
#include <Common/filesystemHelpers.h>
#include <sys/stat.h>
#include <pwd.h>
#if defined(OS_LINUX)
#include <syscall.h>
#include <linux/capability.h>
#endif
#if defined(OS_DARWIN)
#include <mach-o/dyld.h>
#endif
#include <Common/Exception.h>
#include <Common/ShellCommand.h>
#include <Common/formatReadable.h>
#include <Common/Config/ConfigProcessor.h>
#include <Common/OpenSSLHelpers.h>
#include <base/sleep.h>
#include <IO/WriteBufferFromFileDescriptor.h>
#include <IO/ReadBufferFromFile.h>
#include <IO/WriteBufferFromFile.h>
#include <IO/MMapReadBufferFromFile.h>
#include <IO/ReadBufferFromMemory.h>
#include <IO/copyData.h>
#include <IO/Operators.h>
#include <readpassphrase.h>
#include <Poco/Util/XMLConfiguration.h>
#include <incbin.h>
#include "config.h"
/// Embedded configuration files used inside the install program
INCBIN(resource_config_xml, SOURCE_DIR "/programs/server/config.xml");
INCBIN(resource_users_xml, SOURCE_DIR "/programs/server/users.xml");
/** This tool can be used to install ClickHouse without a deb/rpm/tgz package, having only "clickhouse" binary.
* It also allows to avoid dependency on systemd, upstart, SysV init.
*
* The following steps are performed:
*
* - copying the binary to binary directory (/usr/bin).
* - creation of symlinks for tools.
* - creation of clickhouse user and group.
* - creation of config directory (/etc/clickhouse-server).
* - creation of default configuration files.
* - creation of a directory for logs (/var/log/clickhouse-server).
* - creation of a data directory if not exists.
* - setting a password for default user.
* - choose an option to listen connections.
* - changing the ownership and mode of the directories.
* - setting capabilities for binary.
* - setting ulimits for the user.
* - (todo) put service in cron.
*
* It does not install clickhouse-odbc-bridge.
*/
namespace DB
{
namespace ErrorCodes
{
extern const int FILE_DOESNT_EXIST;
extern const int CANNOT_OPEN_FILE;
extern const int SYSTEM_ERROR;
extern const int NOT_ENOUGH_SPACE;
extern const int NOT_IMPLEMENTED;
extern const int CANNOT_KILL;
extern const int BAD_ARGUMENTS;
}
}
#if defined(OS_DARWIN)
/// Until createUser() and createGroup() are implemented, only sudo-less installations are supported/default for macOS.
static constexpr auto DEFAULT_CLICKHOUSE_SERVER_USER = "";
static constexpr auto DEFAULT_CLICKHOUSE_SERVER_GROUP = "";
static constexpr auto DEFAULT_CLICKHOUSE_BRIDGE_USER = "";
static constexpr auto DEFAULT_CLICKHOUSE_BRIDGE_GROUP = "";
#else
static constexpr auto DEFAULT_CLICKHOUSE_SERVER_USER = "clickhouse";
static constexpr auto DEFAULT_CLICKHOUSE_SERVER_GROUP = "clickhouse";
static constexpr auto DEFAULT_CLICKHOUSE_BRIDGE_USER = "clickhouse-bridge";
static constexpr auto DEFAULT_CLICKHOUSE_BRIDGE_GROUP = "clickhouse-bridge";
#endif
using namespace DB;
namespace po = boost::program_options;
namespace fs = std::filesystem;
static auto executeScript(const std::string & command, bool throw_on_error = false)
{
auto sh = ShellCommand::execute(command);
WriteBufferFromFileDescriptor wb_stdout(STDOUT_FILENO);
WriteBufferFromFileDescriptor wb_stderr(STDERR_FILENO);
copyData(sh->out, wb_stdout);
copyData(sh->err, wb_stderr);
if (throw_on_error)
{
sh->wait();
return 0;
}
else
return sh->tryWait();
}
static bool ask(std::string question)
{
while (true)
{
std::string answer;
std::cout << question;
std::getline(std::cin, answer);
if (!std::cin.good())
return false;
if (answer.empty() || answer == "n" || answer == "N")
return false;
if (answer == "y" || answer == "Y")
return true;
}
}
static bool filesEqual(std::string path1, std::string path2)
{
MMapReadBufferFromFile in1(path1, 0);
MMapReadBufferFromFile in2(path2, 0);
/// memcmp is faster than hashing and comparing hashes
return in1.buffer().size() == in2.buffer().size()
&& 0 == memcmp(in1.buffer().begin(), in2.buffer().begin(), in1.buffer().size());
}
static void changeOwnership(const String & file_name, const String & user_name, const String & group_name = {}, bool recursive = true)
{
if (!user_name.empty() || !group_name.empty())
{
std::string command = fmt::format("chown {} {}:{} '{}'", (recursive ? "-R" : ""), user_name, group_name, file_name);
fmt::print(" {}\n", command);
executeScript(command);
}
}
static void createGroup(const String & group_name)
{
if (!group_name.empty())
{
#if defined(OS_DARWIN)
// TODO: implement.
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Unable to create a group in macOS");
#elif defined(OS_FREEBSD)
std::string command = fmt::format("pw groupadd {}", group_name);
fmt::print(" {}\n", command);
executeScript(command);
#else
std::string command = fmt::format("groupadd -r {}", group_name);
fmt::print(" {}\n", command);
executeScript(command);
#endif
}
}
static void createUser(const String & user_name, [[maybe_unused]] const String & group_name)
{
if (!user_name.empty())
{
#if defined(OS_DARWIN)
// TODO: implement.
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Unable to create a user in macOS");
#elif defined(OS_FREEBSD)
std::string command = group_name.empty()
? fmt::format("pw useradd -s /bin/false -d /nonexistent -n {}", user_name)
: fmt::format("pw useradd -s /bin/false -d /nonexistent -g {} -n {}", group_name, user_name);
fmt::print(" {}\n", command);
executeScript(command);
#else
std::string command = group_name.empty()
? fmt::format("useradd -r --shell /bin/false --home-dir /nonexistent --user-group {}", user_name)
: fmt::format("useradd -r --shell /bin/false --home-dir /nonexistent -g {} {}", group_name, user_name);
fmt::print(" {}\n", command);
executeScript(command);
#endif
}
}
static std::string formatWithSudo(std::string command, bool needed = true)
{
if (!needed)
return command;
#if defined(OS_FREEBSD)
/// FreeBSD does not have 'sudo' installed.
return fmt::format("su -m root -c '{}'", command);
#else
return fmt::format("sudo {}", command);
#endif
}
int mainEntryClickHouseInstall(int argc, char ** argv)
{
try
{
const char * start_hilite = "";
const char * end_hilite = "";
if (isatty(STDOUT_FILENO))
{
/// ANSI escape sequence for intense color in terminal.
start_hilite = "\033[1m";
end_hilite = "\033[0m";
}
po::options_description desc;
desc.add_options()
("help,h", "produce help message")
("prefix", po::value<std::string>()->default_value("/"), "prefix for all paths")
("binary-path", po::value<std::string>()->default_value("usr/bin"), "where to install binaries")
("config-path", po::value<std::string>()->default_value("etc/clickhouse-server"), "where to install configs")
("log-path", po::value<std::string>()->default_value("var/log/clickhouse-server"), "where to create log directory")
("data-path", po::value<std::string>()->default_value("var/lib/clickhouse"), "directory for data")
("pid-path", po::value<std::string>()->default_value("var/run/clickhouse-server"), "directory for pid file")
("user", po::value<std::string>()->default_value(DEFAULT_CLICKHOUSE_SERVER_USER), "clickhouse user to create")
("group", po::value<std::string>()->default_value(DEFAULT_CLICKHOUSE_SERVER_GROUP), "clickhouse group to create")
("noninteractive,y", "run non-interactively")
("link", "create symlink to the binary instead of copying to binary-path")
;
po::variables_map options;
po::store(po::parse_command_line(argc, argv, desc), options);
if (options.count("help"))
{
std::cout << "Install ClickHouse without .deb/.rpm/.tgz packages (having the binary only)\n\n";
std::cout << "Usage: " << formatWithSudo(std::string(argv[0]) + " install [options]", getuid() != 0) << '\n';
std::cout << desc << '\n';
return 0;
}
/// We need to copy binary to the binary directory.
/// The binary is currently run. We need to obtain its path from procfs (on Linux).
#if defined(OS_DARWIN)
uint32_t path_length = 0;
_NSGetExecutablePath(nullptr, &path_length);
if (path_length <= 1)
throw Exception(ErrorCodes::FILE_DOESNT_EXIST, "Cannot obtain path to the binary");
std::string path(path_length, std::string::value_type());
auto res = _NSGetExecutablePath(&path[0], &path_length);
if (res != 0)
throw Exception(ErrorCodes::FILE_DOESNT_EXIST, "Cannot obtain path to the binary");
if (path.back() == '\0')
path.pop_back();
fs::path binary_self_path(path);
#elif defined(OS_FREEBSD)
/// https://stackoverflow.com/questions/1023306/finding-current-executables-path-without-proc-self-exe
fs::path binary_self_path = argc >= 1 ? argv[0] : "/proc/curproc/file";
#else
fs::path binary_self_path = "/proc/self/exe";
#endif
if (!fs::exists(binary_self_path))
throw Exception(ErrorCodes::FILE_DOESNT_EXIST, "Cannot obtain path to the binary from {}, file doesn't exist",
binary_self_path.string());
fs::path binary_self_canonical_path = fs::canonical(binary_self_path);
/// Copy binary to the destination directory.
fs::path prefix = options["prefix"].as<std::string>();
fs::path bin_dir = prefix / options["binary-path"].as<std::string>();
fs::path main_bin_path = bin_dir / "clickhouse";
fs::path main_bin_tmp_path = bin_dir / "clickhouse.new";
fs::path main_bin_old_path = bin_dir / "clickhouse.old";
size_t binary_size = fs::file_size(binary_self_path);
bool old_binary_exists = fs::exists(main_bin_path);
bool already_installed = false;
if (options.count("link"))
{
if (old_binary_exists)
{
bool is_symlink = FS::isSymlink(main_bin_path);
fs::path points_to;
if (is_symlink)
points_to = fs::weakly_canonical(FS::readSymlink(main_bin_path));
if (is_symlink && points_to == binary_self_canonical_path)
{
already_installed = true;
}
else
{
if (!is_symlink)
{
fmt::print("File {} already exists but it's not a symlink. Will rename to {}.\n",
main_bin_path.string(), main_bin_old_path.string());
fs::rename(main_bin_path, main_bin_old_path);
}
else if (points_to != main_bin_path)
{
fmt::print("Symlink {} already exists but it points to {}. Will replace the old symlink to {}.\n",
main_bin_path.string(), points_to.string(), binary_self_canonical_path.string());
fs::remove(main_bin_path);
}
}
}
if (!already_installed)
{
if (!fs::exists(bin_dir))
{
fmt::print("Creating binary directory {}.\n", bin_dir.string());
fs::create_directories(bin_dir);
}
fmt::print("Creating symlink {} to {}.\n", main_bin_path.string(), binary_self_canonical_path.string());
fs::create_symlink(binary_self_canonical_path, main_bin_path);
if (0 != chmod(binary_self_canonical_path.string().c_str(), S_IRUSR | S_IRGRP | S_IROTH | S_IXUSR | S_IXGRP | S_IXOTH))
throw ErrnoException(ErrorCodes::SYSTEM_ERROR, "Cannot chmod {}", binary_self_canonical_path.string());
}
}
else
{
bool is_symlink = FS::isSymlink(main_bin_path);
if (!is_symlink)
{
/// Check if the binary is the same file (already installed).
if (old_binary_exists && binary_self_canonical_path == fs::canonical(main_bin_path))
{
already_installed = true;
fmt::print("ClickHouse binary is already located at {}\n", main_bin_path.string());
}
/// Check if binary has the same content.
else if (old_binary_exists && binary_size == fs::file_size(main_bin_path))
{
fmt::print("Found already existing ClickHouse binary at {} having the same size. Will check its contents.\n",
main_bin_path.string());
if (filesEqual(binary_self_path.string(), main_bin_path.string()))
{
already_installed = true;
fmt::print("ClickHouse binary is already located at {} and it has the same content as {}\n",
main_bin_path.string(), binary_self_canonical_path.string());
}
}
}
if (already_installed)
{
if (0 != chmod(main_bin_path.string().c_str(), S_IRUSR | S_IRGRP | S_IROTH | S_IXUSR | S_IXGRP | S_IXOTH))
throw ErrnoException(ErrorCodes::SYSTEM_ERROR, "Cannot chmod {}", main_bin_path.string());
}
else
{
if (!fs::exists(bin_dir))
{
fmt::print("Creating binary directory {}.\n", bin_dir.string());
fs::create_directories(bin_dir);
}
size_t available_space = fs::space(bin_dir).available;
if (available_space < binary_size)
throw Exception(ErrorCodes::NOT_ENOUGH_SPACE, "Not enough space for clickhouse binary in {}, required {}, available {}.",
bin_dir.string(), ReadableSize(binary_size), ReadableSize(available_space));
fmt::print("Copying ClickHouse binary to {}\n", main_bin_tmp_path.string());
try
{
String source = binary_self_path.string();
String destination = main_bin_tmp_path.string();
/// Try to make a hard link first, as an optimization.
/// It is possible if the source and the destination are on the same filesystems.
if (0 != link(source.c_str(), destination.c_str()))
{
ReadBufferFromFile in(binary_self_path.string());
WriteBufferFromFile out(main_bin_tmp_path.string());
copyData(in, out);
out.sync();
out.finalize();
}
if (0 != chmod(destination.c_str(), S_IRUSR | S_IRGRP | S_IROTH | S_IXUSR | S_IXGRP | S_IXOTH))
throw ErrnoException(ErrorCodes::SYSTEM_ERROR, "Cannot chmod {}", main_bin_tmp_path.string());
}
catch (const Exception & e)
{
if (e.code() == ErrorCodes::CANNOT_OPEN_FILE && geteuid() != 0)
std::cerr << "Install must be run as root: " << formatWithSudo("./clickhouse install") << '\n';
throw;
}
if (old_binary_exists)
{
fmt::print("{} already exists, will rename existing binary to {} and put the new binary in place\n",
main_bin_path.string(), main_bin_old_path.string());
/// There is file exchange operation in Linux but it's not portable.
fs::rename(main_bin_path, main_bin_old_path);
}
fmt::print("Renaming {} to {}.\n", main_bin_tmp_path.string(), main_bin_path.string());
fs::rename(main_bin_tmp_path, main_bin_path);
}
}
/// Create symlinks.
std::initializer_list<std::string_view> tools
{
"clickhouse-server",
"clickhouse-client",
"clickhouse-local",
"clickhouse-benchmark",
"clickhouse-copier",
"clickhouse-obfuscator",
"clickhouse-git-import",
"clickhouse-compressor",
"clickhouse-format",
"clickhouse-extract-from-config",
"clickhouse-keeper",
"clickhouse-keeper-converter",
"clickhouse-disks",
"ch",
"chl",
"chc",
};
for (const auto & tool : tools)
{
bool need_to_create = true;
fs::path symlink_path = bin_dir / tool;
if (fs::exists(symlink_path))
{
/// Do not replace short named symlinks if they are already present in the system
/// to avoid collision with other tools.
if (!tool.starts_with("clickhouse"))
{
fmt::print("Symlink {} already exists. Will keep it.\n", symlink_path.string());
need_to_create = false;
}
else
{
bool is_symlink = FS::isSymlink(symlink_path);
fs::path points_to;
if (is_symlink)
points_to = fs::weakly_canonical(FS::readSymlink(symlink_path));
if (is_symlink && (points_to == main_bin_path || (options.count("link") && points_to == binary_self_canonical_path)))
{
need_to_create = false;
}
else
{
if (!is_symlink)
{
fs::path rename_path = symlink_path.replace_extension(".old");
fmt::print("File {} already exists but it's not a symlink. Will rename to {}.\n",
symlink_path.string(), rename_path.string());
fs::rename(symlink_path, rename_path);
}
else if (points_to != main_bin_path)
{
fmt::print("Symlink {} already exists but it points to {}. Will replace the old symlink to {}.\n",
symlink_path.string(), points_to.string(), main_bin_path.string());
fs::remove(symlink_path);
}
}
}
}
if (need_to_create)
{
fmt::print("Creating symlink {} to {}.\n", symlink_path.string(), main_bin_path.string());
fs::create_symlink(main_bin_path, symlink_path);
}
}
/// Creation of clickhouse user and group.
std::string user = options["user"].as<std::string>();
std::string group = options["group"].as<std::string>();
if (!group.empty())
{
fmt::print("Creating clickhouse group if it does not exist.\n");
createGroup(group);
}
else
fmt::print("Will not create a dedicated clickhouse group.\n");
if (!user.empty())
{
fmt::print("Creating clickhouse user if it does not exist.\n");
createUser(user, group);
if (group.empty())
group = user;
/// Setting ulimits.
try
{
#if defined(OS_DARWIN)
/// TODO Set ulimits on macOS.
#else
fs::path ulimits_dir = "/etc/security/limits.d";
fs::path ulimits_file = ulimits_dir / fmt::format("{}.conf", user);
fmt::print("Will set ulimits for {} user in {}.\n", user, ulimits_file.string());
std::string ulimits_content = fmt::format(
"{0}\tsoft\tnofile\t1048576\n"
"{0}\thard\tnofile\t1048576\n", user);
fs::create_directories(ulimits_dir);
WriteBufferFromFile out(ulimits_file.string());
out.write(ulimits_content.data(), ulimits_content.size());
out.sync();
out.finalize();
#endif
}
catch (...)
{
std::cerr << "Cannot set ulimits: " << getCurrentExceptionMessage(false) << "\n";
}
}
else
fmt::print("Will not create a dedicated clickhouse user.\n");
/// Creating configuration files and directories.
fs::path config_dir = prefix / options["config-path"].as<std::string>();
if (!fs::exists(config_dir))
{
fmt::print("Creating config directory {}.\n", config_dir.string());
fs::create_directories(config_dir);
}
fs::path main_config_file = config_dir / "config.xml";
fs::path users_config_file = config_dir / "users.xml";
fs::path config_d = config_dir / "config.d";
fs::path users_d = config_dir / "users.d";
fs::path log_path = prefix / options["log-path"].as<std::string>();
fs::path data_path = prefix / options["data-path"].as<std::string>();
fs::path pid_path = prefix / options["pid-path"].as<std::string>();
bool has_password_for_default_user = false;
if (!fs::exists(config_d))
{
fmt::print("Creating config directory {} that is used for tweaks of main server configuration.\n", config_d.string());
fs::create_directory(config_d);
}
if (!fs::exists(users_d))
{
fmt::print("Creating config directory {} that is used for tweaks of users configuration.\n", users_d.string());
fs::create_directory(users_d);
}
if (!fs::exists(main_config_file))
{
std::string_view main_config_content(reinterpret_cast<const char *>(gresource_config_xmlData), gresource_config_xmlSize);
if (main_config_content.empty())
{
fmt::print("There is no default config.xml, you have to download it and place to {}.\n", main_config_file.string());
}
else
{
{
WriteBufferFromFile out(main_config_file.string());
out.write(main_config_content.data(), main_config_content.size());
out.sync();
out.finalize();
}
/// Override the default paths.
/// Data paths.
const std::string data_file = config_d / "data-paths.xml";
if (!fs::exists(data_file))
{
WriteBufferFromFile out(data_file);
out << "<clickhouse>\n"
" <path>" << data_path.string() << "</path>\n"
" <tmp_path>" << (data_path / "tmp").string() << "</tmp_path>\n"
" <user_files_path>" << (data_path / "user_files").string() << "</user_files_path>\n"
" <format_schema_path>" << (data_path / "format_schemas").string() << "</format_schema_path>\n"
"</clickhouse>\n";
out.sync();
out.finalize();
fs::permissions(data_file, fs::perms::owner_read, fs::perm_options::replace);
fmt::print("Data path configuration override is saved to file {}.\n", data_file);
}
/// Logger.
const std::string logger_file = config_d / "logger.xml";
if (!fs::exists(logger_file))
{
WriteBufferFromFile out(logger_file);
out << "<clickhouse>\n"
" <logger>\n"
" <log>" << (log_path / "clickhouse-server.log").string() << "</log>\n"
" <errorlog>" << (log_path / "clickhouse-server.err.log").string() << "</errorlog>\n"
" </logger>\n"
"</clickhouse>\n";
out.sync();
out.finalize();
fs::permissions(logger_file, fs::perms::owner_read, fs::perm_options::replace);
fmt::print("Log path configuration override is saved to file {}.\n", logger_file);
}
/// User directories.
const std::string user_directories_file = config_d / "user-directories.xml";
if (!fs::exists(user_directories_file))
{
WriteBufferFromFile out(user_directories_file);
out << "<clickhouse>\n"
" <user_directories>\n"
" <local_directory>\n"
" <path>" << (data_path / "access").string() << "</path>\n"
" </local_directory>\n"
" </user_directories>\n"
"</clickhouse>\n";
out.sync();
out.finalize();
fs::permissions(user_directories_file, fs::perms::owner_read, fs::perm_options::replace);
fmt::print("User directory path configuration override is saved to file {}.\n", user_directories_file);
}
/// OpenSSL.
const std::string openssl_file = config_d / "openssl.xml";
if (!fs::exists(openssl_file))
{
WriteBufferFromFile out(openssl_file);
out << "<clickhouse>\n"
" <openSSL>\n"
" <server>\n"
" <certificateFile>" << (config_dir / "server.crt").string() << "</certificateFile>\n"
" <privateKeyFile>" << (config_dir / "server.key").string() << "</privateKeyFile>\n"
" <dhParamsFile>" << (config_dir / "dhparam.pem").string() << "</dhParamsFile>\n"
" </server>\n"
" </openSSL>\n"
"</clickhouse>\n";
out.sync();
out.finalize();
fs::permissions(openssl_file, fs::perms::owner_read, fs::perm_options::replace);
fmt::print("OpenSSL path configuration override is saved to file {}.\n", openssl_file);
}
}
}
else
{
fmt::print("Config file {} already exists, will keep it and extract path info from it.\n", main_config_file.string());
ConfigProcessor processor(main_config_file.string(), /* throw_on_bad_incl = */ false, /* log_to_console = */ false);
ConfigurationPtr configuration(new Poco::Util::XMLConfiguration(processor.processConfig()));
if (configuration->has("path"))
{
data_path = configuration->getString("path");
fmt::print("{} has {} as data path.\n", main_config_file.string(), data_path.string());
}
if (configuration->has("logger.log"))
{
log_path = fs::path(configuration->getString("logger.log")).remove_filename();
fmt::print("{} has {} as log path.\n", main_config_file.string(), log_path.string());
}
}
if (!fs::exists(users_config_file))
{
std::string_view users_config_content(reinterpret_cast<const char *>(gresource_users_xmlData), gresource_users_xmlSize);
if (users_config_content.empty())
{
fmt::print("There is no default users.xml, you have to download it and place to {}.\n", users_config_file.string());
}
else
{
WriteBufferFromFile out(users_config_file.string());
out.write(users_config_content.data(), users_config_content.size());
out.sync();
out.finalize();
}
}
else
{
fmt::print("Users config file {} already exists, will keep it and extract users info from it.\n", users_config_file.string());
/// Check if password for the default user already specified.
ConfigProcessor processor(users_config_file.string(), /* throw_on_bad_incl = */ false, /* log_to_console = */ false);
ConfigurationPtr configuration(new Poco::Util::XMLConfiguration(processor.processConfig()));
if (!configuration->getString("users.default.password", "").empty()
|| !configuration->getString("users.default.password_sha256_hex", "").empty()
|| !configuration->getString("users.default.password_double_sha1_hex", "").empty())
{
has_password_for_default_user = true;
}
}
/// Create directories for data and log.
if (fs::exists(log_path))
{
fmt::print("Log directory {} already exists.\n", log_path.string());
}
else
{
fmt::print("Creating log directory {}.\n", log_path.string());
fs::create_directories(log_path);
}
if (fs::exists(data_path))
{
fmt::print("Data directory {} already exists.\n", data_path.string());
}
else
{
fmt::print("Creating data directory {}.\n", data_path.string());
fs::create_directories(data_path);
}
if (fs::exists(pid_path))
{
fmt::print("Pid directory {} already exists.\n", pid_path.string());
}
else
{
fmt::print("Creating pid directory {}.\n", pid_path.string());
fs::create_directories(pid_path);
}
/// Chmod and chown data and log directories
changeOwnership(log_path, user, group);
changeOwnership(pid_path, user, group);
/// Not recursive, because there can be a huge number of files and it will be slow.
changeOwnership(data_path, user, group, /* recursive= */ false);
/// All users are allowed to read pid file (for clickhouse status command).
fs::permissions(pid_path, fs::perms::owner_all | fs::perms::group_read | fs::perms::others_read, fs::perm_options::replace);
/// Other users in clickhouse group are allowed to read and even delete logs.
fs::permissions(log_path, fs::perms::owner_all | fs::perms::group_all, fs::perm_options::replace);
/// Data directory is not accessible to anyone except clickhouse.
fs::permissions(data_path, fs::perms::owner_all, fs::perm_options::replace);
fs::path odbc_bridge_path = bin_dir / "clickhouse-odbc-bridge";
fs::path library_bridge_path = bin_dir / "clickhouse-library-bridge";
if (fs::exists(odbc_bridge_path) || fs::exists(library_bridge_path))
{
createGroup(DEFAULT_CLICKHOUSE_BRIDGE_GROUP);
createUser(DEFAULT_CLICKHOUSE_BRIDGE_USER, DEFAULT_CLICKHOUSE_BRIDGE_GROUP);
if (fs::exists(odbc_bridge_path))
changeOwnership(odbc_bridge_path, DEFAULT_CLICKHOUSE_BRIDGE_USER, DEFAULT_CLICKHOUSE_BRIDGE_GROUP);
if (fs::exists(library_bridge_path))
changeOwnership(library_bridge_path, DEFAULT_CLICKHOUSE_BRIDGE_USER, DEFAULT_CLICKHOUSE_BRIDGE_GROUP);
}
bool stdin_is_a_tty = isatty(STDIN_FILENO);
bool stdout_is_a_tty = isatty(STDOUT_FILENO);
/// dpkg or apt installers can ask for non-interactive work explicitly.
const char * debian_frontend_var = getenv("DEBIAN_FRONTEND"); // NOLINT(concurrency-mt-unsafe)
bool noninteractive = (debian_frontend_var && debian_frontend_var == std::string_view("noninteractive"))
|| options.count("noninteractive");
bool is_interactive = !noninteractive && stdin_is_a_tty && stdout_is_a_tty;
/// We can ask password even if stdin is closed/redirected but /dev/tty is available.
bool can_ask_password = !noninteractive && stdout_is_a_tty;
/// Set up password for default user.
if (has_password_for_default_user)
{
fmt::print("{}Password for the default user is already specified. To remind or reset, see {} and {}.{}\n",
start_hilite, users_config_file.string(), users_d.string(), end_hilite);
}
else if (!can_ask_password)
{
fmt::print("{}Password for the default user is an empty string. See {} and {} to change it.{}\n",
start_hilite, users_config_file.string(), users_d.string(), end_hilite);
}
else
{
/// NOTE: When installing debian package with dpkg -i, stdin is not a terminal but we are still being able to enter password.
/// More sophisticated method with /dev/tty is used inside the `readpassphrase` function.
char buf[1000] = {};
std::string password;
if (auto * result = readpassphrase("Enter password for the default user: ", buf, sizeof(buf), 0))
password = result;
if (!password.empty())
{
std::string password_file = users_d / "default-password.xml";
WriteBufferFromFile out(password_file);
#if USE_SSL
std::vector<uint8_t> hash;
hash.resize(32);
encodeSHA256(password, hash.data());
std::string hash_hex;
hash_hex.resize(64);
for (size_t i = 0; i < 32; ++i)
writeHexByteLowercase(hash[i], &hash_hex[2 * i]);
out << "<clickhouse>\n"
" <users>\n"
" <default>\n"
" <password remove='1' />\n"
" <password_sha256_hex>" << hash_hex << "</password_sha256_hex>\n"
" </default>\n"
" </users>\n"
"</clickhouse>\n";
out.sync();
out.finalize();
fmt::print("{}Password for the default user is saved in file {}.{}\n", start_hilite, password_file, end_hilite);
#else
out << "<clickhouse>\n"
" <users>\n"
" <default>\n"
" <password><![CDATA[" << password << "]]></password>\n"
" </default>\n"
" </users>\n"
"</clickhouse>\n";
out.sync();
out.finalize();
fmt::print("{}Password for the default user is saved in plaintext in file {}.{}\n", start_hilite, password_file, end_hilite);
#endif
has_password_for_default_user = true;
}
else
fmt::print("{}Password for the default user is an empty string. See {} and {} to change it.{}\n",
start_hilite, users_config_file.string(), users_d.string(), end_hilite);
}
/** Set capabilities for the binary.
*
* 1. Check that "setcap" tool exists.
* 2. Check that an arbitrary program with installed capabilities can run.
* 3. Set the capabilities.
*
* The second is important for Docker and systemd-nspawn.
* When the container has no capabilities,
* but the executable file inside the container has capabilities,
* then attempt to run this file will end up with a cryptic "Operation not permitted" message.
*/
#if defined(OS_LINUX)
fmt::print("Setting capabilities for clickhouse binary. This is optional.\n");
std::string command = fmt::format("command -v setcap >/dev/null"
" && command -v capsh >/dev/null"
" && capsh --has-p=cap_net_admin,cap_ipc_lock,cap_sys_nice,cap_net_bind_service+ep >/dev/null 2>&1"
" && setcap 'cap_net_admin,cap_ipc_lock,cap_sys_nice,cap_net_bind_service+ep' {0}"
" || echo \"Cannot set 'net_admin' or 'ipc_lock' or 'sys_nice' or 'net_bind_service' capability for clickhouse binary."
" This is optional. Taskstats accounting will be disabled."
" To enable taskstats accounting you may add the required capability later manually.\"",
fs::canonical(main_bin_path).string());
executeScript(command);
#endif
/// If password was set, ask for open for connections.
if (is_interactive && has_password_for_default_user)
{
if (ask("Allow server to accept connections from the network (default is localhost only), [y/N]: "))
{
std::string listen_file = config_d / "listen.xml";
WriteBufferFromFile out(listen_file);
out << "<clickhouse>\n"
" <listen_host>::</listen_host>\n"
"</clickhouse>\n";
out.sync();
out.finalize();
fmt::print("The choice is saved in file {}.\n", listen_file);
}
}
/// Chmod and chown configs
changeOwnership(config_dir, user, group);
/// Symlink "preprocessed_configs" is created by the server, so "write" is needed.
fs::permissions(config_dir, fs::perms::owner_all, fs::perm_options::replace);
/// Subdirectories, so "execute" is needed.
if (fs::exists(config_d))
fs::permissions(config_d, fs::perms::owner_read | fs::perms::owner_exec, fs::perm_options::replace);
if (fs::exists(users_d))
fs::permissions(users_d, fs::perms::owner_read | fs::perms::owner_exec, fs::perm_options::replace);
/// Readonly.
if (fs::exists(main_config_file))
fs::permissions(main_config_file, fs::perms::owner_read, fs::perm_options::replace);
if (fs::exists(users_config_file))
fs::permissions(users_config_file, fs::perms::owner_read, fs::perm_options::replace);
std::string maybe_password;
if (has_password_for_default_user)
maybe_password = " --password";
fs::path pid_file = pid_path / "clickhouse-server.pid";
if (fs::exists(pid_file))
{
fmt::print(
"\nClickHouse has been successfully installed.\n"
"\nRestart clickhouse-server with:\n"
" {}\n"
"\nStart clickhouse-client with:\n"
" clickhouse-client{}\n\n",
formatWithSudo("clickhouse restart"),
maybe_password);
}
else
{
fmt::print(
"\nClickHouse has been successfully installed.\n"
"\nStart clickhouse-server with:\n"
" {}\n"
"\nStart clickhouse-client with:\n"
" clickhouse-client{}\n\n",
formatWithSudo("clickhouse start"),
maybe_password);
}
}
catch (const fs::filesystem_error &)
{
std::cerr << getCurrentExceptionMessage(false) << '\n';
if (getuid() != 0)
std::cerr << "\nRun with " << formatWithSudo("...") << "\n";
return getCurrentExceptionCode();
}
catch (...)
{
std::cerr << getCurrentExceptionMessage(false) << '\n';
return getCurrentExceptionCode();
}
return 0;
}
namespace
{
int start(const std::string & user, const fs::path & executable, const fs::path & config, const fs::path & pid_file, unsigned max_tries)
{
if (fs::exists(pid_file))
{
ReadBufferFromFile in(pid_file.string());
Int32 pid;
if (tryReadIntText(pid, in))
{
fmt::print("{} file exists and contains pid = {}.\n", pid_file.string(), pid);
if (0 == kill(pid, 0))
{
fmt::print("The process with pid = {} is already running.\n", pid);
return 2;
}
}
else
{
fmt::print("{} file exists but damaged, ignoring.\n", pid_file.string());
fs::remove(pid_file);
}
}
else
{
/// Create a directory for pid file.
/// It's created by "install" but we also support cases when ClickHouse is already installed different way.
fs::path pid_path = pid_file;
pid_path.remove_filename();
fs::create_directories(pid_path);
/// All users are allowed to read pid file (for clickhouse status command).
fs::permissions(pid_path, fs::perms::owner_all | fs::perms::group_read | fs::perms::others_read, fs::perm_options::replace);
changeOwnership(pid_path, user);
}
std::string command = fmt::format("{} --config-file {} --pid-file {} --daemon",
executable.string(), config.string(), pid_file.string());
if (!user.empty())
{
/// sudo respects limits in /etc/security/limits.conf e.g. open files,
/// that's why we are using it instead of the 'clickhouse su' tool.
/// by default, sudo resets all the ENV variables, but we should preserve
/// the values /etc/default/clickhouse in /etc/init.d/clickhouse file
command = fmt::format("sudo --preserve-env -u '{}' {}", user, command);
}
fmt::print("Will run {}\n", command);
executeScript(command, true);
/// Wait to start.
size_t try_num = 0;
for (; try_num < max_tries; ++try_num)
{
fmt::print("Waiting for server to start\n");
if (fs::exists(pid_file))
{
fmt::print("Server started\n");
break;
}
sleepForSeconds(1);
}
if (try_num == max_tries)
{
fmt::print("Cannot start server. You can execute {} without --daemon option to run manually.\n", command);
fs::path log_path;
{
ConfigProcessor processor(config.string(), /* throw_on_bad_incl = */ false, /* log_to_console = */ false);
ConfigurationPtr configuration(new Poco::Util::XMLConfiguration(processor.processConfig()));
if (configuration->has("logger.log"))
log_path = fs::path(configuration->getString("logger.log")).remove_filename();
}
if (log_path.empty())
{
fmt::print("Cannot obtain path to logs (logger.log) from config file {}.\n", config.string());
}
else
{
fs::path stderr_path = log_path;
stderr_path.replace_filename("stderr.log");
fmt::print("Look for logs at {} and for {}.\n", log_path.string(), stderr_path.string());
}
return 3;
}
return 0;
}
int isRunning(const fs::path & pid_file)
{
int pid = 0;
if (fs::exists(pid_file))
{
try
{
ReadBufferFromFile in(pid_file.string());
if (tryReadIntText(pid, in))
{
fmt::print("{} file exists and contains pid = {}.\n", pid_file.string(), pid);
}
else
{
fmt::print("{} file exists but damaged, ignoring.\n", pid_file.string());
fs::remove(pid_file);
}
}
catch (const Exception & e)
{
if (e.code() != ErrorCodes::FILE_DOESNT_EXIST)
throw;
/// If file does not exist (TOCTOU) - it's ok.
}
}
if (!pid)
{
auto sh = ShellCommand::execute("pidof clickhouse-server");
if (tryReadIntText(pid, sh->out))
{
fmt::print("Found pid = {} in the list of running processes.\n", pid);
}
else if (!sh->out.eof())
{
fmt::print("The pidof command returned unusual output.\n");
}
WriteBufferFromFileDescriptor std_err(STDERR_FILENO);
copyData(sh->err, std_err);
sh->tryWait();
}
if (pid)
{
if (0 == kill(pid, 0))
{
fmt::print("The process with pid = {} is running.\n", pid);
}
else if (errno == ESRCH)
{
fmt::print("The process with pid = {} does not exist.\n", pid);
return 0;
}
else
throw ErrnoException(ErrorCodes::CANNOT_KILL, "Cannot obtain the status of pid {} with `kill`", pid);
}
if (!pid)
{
fmt::print("Now there is no clickhouse-server process.\n");
}
return pid;
}
bool sendSignalAndWaitForStop(const fs::path & pid_file, int signal, unsigned max_tries, unsigned wait_ms, const char * signal_name)
{
int pid = isRunning(pid_file);
if (!pid)
return true;
if (0 == kill(pid, signal))
fmt::print("Sent {} signal to process with pid {}.\n", signal_name, pid);
else
throw ErrnoException(ErrorCodes::SYSTEM_ERROR, "Cannot send {} signal", signal_name);
size_t try_num = 0;
for (; try_num < max_tries; ++try_num)
{
fmt::print("Waiting for server to stop\n");
if (!isRunning(pid_file))
{
fmt::print("Server stopped\n");
break;
}
sleepForMilliseconds(wait_ms);
}
return try_num < max_tries;
}
int stop(const fs::path & pid_file, bool force, bool do_not_kill, unsigned max_tries)
{
if (force && do_not_kill)
throw Exception(ErrorCodes::BAD_ARGUMENTS, "Specified flags are incompatible");
int signal = force ? SIGKILL : SIGTERM;
const char * signal_name = force ? "kill" : "terminate";
if (sendSignalAndWaitForStop(pid_file, signal, max_tries, 1000, signal_name))
return 0;
int pid = isRunning(pid_file);
if (!pid)
return 0;
if (do_not_kill)
{
fmt::print("Process (pid = {}) is still running. Will not try to kill it.\n", pid);
return 1;
}
/// Send termination signal again, the server will receive it and immediately terminate.
fmt::print("Will send the termination signal again to force the termination (pid = {}).\n", pid);
if (sendSignalAndWaitForStop(pid_file, signal, std::min(10U, max_tries), 1000, signal_name))
return 0;
/// Send kill signal. Total wait is 100 seconds.
constexpr size_t num_kill_check_tries = 1000;
constexpr size_t kill_check_delay_ms = 100;
fmt::print("Will terminate forcefully (pid = {}).\n", pid);
if (sendSignalAndWaitForStop(pid_file, SIGKILL, num_kill_check_tries, kill_check_delay_ms, signal_name))
return 0;
if (!isRunning(pid_file))
return 0;
throw Exception(ErrorCodes::CANNOT_KILL,
"The server process still exists after {} tries (delay: {} ms)",
num_kill_check_tries, kill_check_delay_ms);
}
}
int mainEntryClickHouseStart(int argc, char ** argv)
{
try
{
po::options_description desc;
desc.add_options()
("help,h", "produce help message")
("prefix", po::value<std::string>()->default_value("/"), "prefix for all paths")
("binary-path", po::value<std::string>()->default_value("usr/bin"), "directory with binary")
("config-path", po::value<std::string>()->default_value("etc/clickhouse-server"), "directory with configs")
("pid-path", po::value<std::string>()->default_value("var/run/clickhouse-server"), "directory for pid file")
("user", po::value<std::string>()->default_value(DEFAULT_CLICKHOUSE_SERVER_USER), "clickhouse user")
("max-tries", po::value<unsigned>()->default_value(60), "Max number of tries for waiting the server (with 1 second delay)")
;
po::variables_map options;
po::store(po::parse_command_line(argc, argv, desc), options);
if (options.count("help"))
{
std::cout << "Usage: " << formatWithSudo(std::string(argv[0]) + " start", getuid() != 0) << '\n';
return 1;
}
std::string user = options["user"].as<std::string>();
fs::path prefix = options["prefix"].as<std::string>();
fs::path executable = prefix / options["binary-path"].as<std::string>() / "clickhouse-server";
fs::path config = prefix / options["config-path"].as<std::string>() / "config.xml";
fs::path pid_file = prefix / options["pid-path"].as<std::string>() / "clickhouse-server.pid";
unsigned max_tries = options["max-tries"].as<unsigned>();
return start(user, executable, config, pid_file, max_tries);
}
catch (...)
{
std::cerr << getCurrentExceptionMessage(false) << '\n';
return getCurrentExceptionCode();
}
}
int mainEntryClickHouseStop(int argc, char ** argv)
{
try
{
po::options_description desc;
desc.add_options()
("help,h", "produce help message")
("prefix", po::value<std::string>()->default_value("/"), "prefix for all paths")
("pid-path", po::value<std::string>()->default_value("var/run/clickhouse-server"), "directory for pid file")
("force", po::bool_switch(), "Stop with KILL signal instead of TERM")
("do-not-kill", po::bool_switch(), "Do not send KILL even if TERM did not help")
("max-tries", po::value<unsigned>()->default_value(60), "Max number of tries for waiting the server to finish after sending TERM (with 1 second delay)")
;
po::variables_map options;
po::store(po::parse_command_line(argc, argv, desc), options);
if (options.count("help"))
{
std::cout << "Usage: " << formatWithSudo(std::string(argv[0]) + " stop", getuid() != 0) << '\n';
return 1;
}
fs::path prefix = options["prefix"].as<std::string>();
fs::path pid_file = prefix / options["pid-path"].as<std::string>() / "clickhouse-server.pid";
bool force = options["force"].as<bool>();
bool do_not_kill = options["do-not-kill"].as<bool>();
unsigned max_tries = options["max-tries"].as<unsigned>();
return stop(pid_file, force, do_not_kill, max_tries);
}
catch (...)
{
std::cerr << getCurrentExceptionMessage(false) << '\n';
return getCurrentExceptionCode();
}
}
int mainEntryClickHouseStatus(int argc, char ** argv)
{
try
{
po::options_description desc;
desc.add_options()
("help,h", "produce help message")
("prefix", po::value<std::string>()->default_value("/"), "prefix for all paths")
("pid-path", po::value<std::string>()->default_value("var/run/clickhouse-server"), "directory for pid file")
;
po::variables_map options;
po::store(po::parse_command_line(argc, argv, desc), options);
if (options.count("help"))
{
std::cout << "Usage: " << formatWithSudo(std::string(argv[0]) + " status", getuid() != 0) << '\n';
return 1;
}
fs::path prefix = options["prefix"].as<std::string>();
fs::path pid_file = prefix / options["pid-path"].as<std::string>() / "clickhouse-server.pid";
isRunning(pid_file);
}
catch (...)
{
std::cerr << getCurrentExceptionMessage(false) << '\n';
return getCurrentExceptionCode();
}
return 0;
}
int mainEntryClickHouseRestart(int argc, char ** argv)
{
try
{
po::options_description desc;
desc.add_options()
("help,h", "produce help message")
("prefix", po::value<std::string>()->default_value("/"), "prefix for all paths")
("binary-path", po::value<std::string>()->default_value("usr/bin"), "directory with binary")
("config-path", po::value<std::string>()->default_value("etc/clickhouse-server"), "directory with configs")
("pid-path", po::value<std::string>()->default_value("var/run/clickhouse-server"), "directory for pid file")
("user", po::value<std::string>()->default_value(DEFAULT_CLICKHOUSE_SERVER_USER), "clickhouse user")
("force", po::value<bool>()->default_value(false), "Stop with KILL signal instead of TERM")
("do-not-kill", po::bool_switch(), "Do not send KILL even if TERM did not help")
("max-tries", po::value<unsigned>()->default_value(60), "Max number of tries for waiting the server (with 1 second delay)")
;
po::variables_map options;
po::store(po::parse_command_line(argc, argv, desc), options);
if (options.count("help"))
{
std::cout << "Usage: " << formatWithSudo(std::string(argv[0]) + " restart", getuid() != 0) << '\n';
return 1;
}
std::string user = options["user"].as<std::string>();
fs::path prefix = options["prefix"].as<std::string>();
fs::path executable = prefix / options["binary-path"].as<std::string>() / "clickhouse-server";
fs::path config = prefix / options["config-path"].as<std::string>() / "config.xml";
fs::path pid_file = prefix / options["pid-path"].as<std::string>() / "clickhouse-server.pid";
bool force = options["force"].as<bool>();
bool do_not_kill = options["do-not-kill"].as<bool>();
unsigned max_tries = options["max-tries"].as<unsigned>();
if (int res = stop(pid_file, force, do_not_kill, max_tries))
return res;
return start(user, executable, config, pid_file, max_tries);
}
catch (...)
{
std::cerr << getCurrentExceptionMessage(false) << '\n';
return getCurrentExceptionCode();
}
}
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