386 lines
11 KiB
C++
386 lines
11 KiB
C++
/*
|
|
* Copyright (c) 2018 MariaDB Corporation Ab
|
|
*
|
|
* Use of this software is governed by the Business Source License included
|
|
* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
|
|
*
|
|
* Change Date: 2022-01-01
|
|
*
|
|
* On the date above, in accordance with the Business Source License, use
|
|
* of this software will be governed by version 2 or later of the General
|
|
* Public License.
|
|
*/
|
|
#pragma once
|
|
|
|
/**
|
|
* Internal header for the server type
|
|
*/
|
|
|
|
#include <maxbase/ccdefs.hh>
|
|
|
|
#include <map>
|
|
#include <mutex>
|
|
#include <maxscale/config.hh>
|
|
#include <maxscale/server.hh>
|
|
#include <maxscale/resultset.hh>
|
|
|
|
// Private server implementation
|
|
class Server : public SERVER
|
|
{
|
|
public:
|
|
Server(const std::string& name,
|
|
const std::string& protocol = "",
|
|
const std::string& authenticator = "",
|
|
std::unique_ptr<mxs::SSLContext> ssl = {})
|
|
: SERVER(std::move(ssl))
|
|
, m_name(name)
|
|
{
|
|
m_settings.protocol = protocol;
|
|
m_settings.authenticator = authenticator;
|
|
}
|
|
|
|
long persistpoolmax() const
|
|
{
|
|
return m_settings.persistpoolmax;
|
|
}
|
|
|
|
void set_persistpoolmax(long persistpoolmax)
|
|
{
|
|
m_settings.persistpoolmax = persistpoolmax;
|
|
}
|
|
|
|
long persistmaxtime() const
|
|
{
|
|
return m_settings.persistmaxtime;
|
|
}
|
|
|
|
void set_persistmaxtime(long persistmaxtime)
|
|
{
|
|
m_settings.persistmaxtime = persistmaxtime;
|
|
}
|
|
|
|
void set_rank(int64_t rank)
|
|
{
|
|
m_settings.rank = rank;
|
|
}
|
|
|
|
bool have_disk_space_limits() const override
|
|
{
|
|
std::lock_guard<std::mutex> guard(m_settings.lock);
|
|
return !m_settings.disk_space_limits.empty();
|
|
}
|
|
|
|
DiskSpaceLimits get_disk_space_limits() const override
|
|
{
|
|
std::lock_guard<std::mutex> guard(m_settings.lock);
|
|
return m_settings.disk_space_limits;
|
|
}
|
|
|
|
void set_disk_space_limits(const DiskSpaceLimits& new_limits)
|
|
{
|
|
std::lock_guard<std::mutex> guard(m_settings.lock);
|
|
m_settings.disk_space_limits = new_limits;
|
|
}
|
|
|
|
bool persistent_conns_enabled() const override
|
|
{
|
|
return m_settings.persistpoolmax > 0;
|
|
}
|
|
|
|
void set_version(uint64_t version_num, const std::string& version_str) override;
|
|
|
|
Version version() const override
|
|
{
|
|
return m_info.version_num();
|
|
}
|
|
|
|
Type type() const override
|
|
{
|
|
return m_info.type();
|
|
}
|
|
|
|
std::string version_string() const override
|
|
{
|
|
return m_info.version_string();
|
|
}
|
|
|
|
const char* name() const override
|
|
{
|
|
return m_name.c_str();
|
|
}
|
|
|
|
std::string protocol() const override
|
|
{
|
|
return m_settings.protocol;
|
|
}
|
|
|
|
std::string get_authenticator() const
|
|
{
|
|
return m_settings.authenticator;
|
|
}
|
|
|
|
int64_t rank() const override
|
|
{
|
|
return m_settings.rank;
|
|
}
|
|
|
|
/**
|
|
* Get a DCB from the persistent connection pool, if possible
|
|
*
|
|
* @param user The name of the user needing the connection
|
|
* @param ip Client IP address
|
|
* @param protocol The name of the protocol needed for the connection
|
|
* @param id Thread ID
|
|
*
|
|
* @return A DCB or NULL if no connection is found
|
|
*/
|
|
DCB* get_persistent_dcb(const std::string& user, const std::string& ip, const std::string& protocol,
|
|
int id);
|
|
|
|
/**
|
|
* Print server details to a dcb.
|
|
*
|
|
* @param dcb Dcb to print to
|
|
*/
|
|
void print_to_dcb(DCB* dcb) const;
|
|
|
|
/**
|
|
* @brief Allocate a new server
|
|
*
|
|
* This will create a new server that represents a backend server that services
|
|
* can use. This function will add the server to the running configuration but
|
|
* will not persist the changes.
|
|
*
|
|
* @param name Unique server name
|
|
* @param params Parameters for the server
|
|
*
|
|
* @return The newly created server or NULL if an error occurred
|
|
*/
|
|
static Server* server_alloc(const char* name, const MXS_CONFIG_PARAMETER& params);
|
|
|
|
/**
|
|
* Creates a server without any configuration. This should be used in unit tests in place of
|
|
* a default ctor.
|
|
*
|
|
* @return A new server
|
|
*/
|
|
static Server* create_test_server();
|
|
|
|
/**
|
|
* Deallocate the specified server
|
|
*
|
|
* @param server The server to deallocate
|
|
* @return Returns true if the server was freed
|
|
*/
|
|
static void server_free(Server* server);
|
|
|
|
/**
|
|
* @brief Find a server with the specified name
|
|
*
|
|
* @param name Name of the server
|
|
* @return The server or NULL if not found
|
|
*/
|
|
static Server* find_by_unique_name(const std::string& name);
|
|
|
|
/**
|
|
* Test if name is not a normal server setting name.
|
|
*
|
|
* @param name Name to check
|
|
* @return True if name is not a standard parameter
|
|
*/
|
|
bool is_custom_parameter(const std::string& name) const;
|
|
|
|
/**
|
|
* Print server details to a DCB
|
|
*
|
|
* Designed to be called within a debugger session in order
|
|
* to display all active servers within the gateway
|
|
*/
|
|
static void dprintServer(DCB*, const Server*);
|
|
|
|
/**
|
|
* Diagnostic to print number of DCBs in persistent pool for a server
|
|
*
|
|
* @param pdcb DCB to print results to
|
|
* @param server SERVER for which DCBs are to be printed
|
|
*/
|
|
static void dprintPersistentDCBs(DCB*, const Server*);
|
|
|
|
/**
|
|
* Print all servers to a DCB
|
|
*
|
|
* Designed to be called within a debugger session in order
|
|
* to display all active servers within the gateway
|
|
*/
|
|
static void dprintAllServers(DCB*);
|
|
|
|
/**
|
|
* Print all servers in Json format to a DCB
|
|
*/
|
|
static void dprintAllServersJson(DCB*);
|
|
|
|
/**
|
|
* List all servers in a tabular form to a DCB
|
|
*
|
|
*/
|
|
static void dListServers(DCB*);
|
|
|
|
/**
|
|
* Convert all servers into JSON format
|
|
*
|
|
* @param host Hostname of this server
|
|
* @return JSON array of servers or NULL if an error occurred
|
|
*/
|
|
static json_t* server_list_to_json(const char* host);
|
|
|
|
static bool create_server_config(const Server* server, const char* filename);
|
|
|
|
static json_t* server_json_attributes(const Server* server);
|
|
|
|
/**
|
|
* Set server custom parameter.
|
|
*
|
|
* @param name Parameter to set
|
|
* @param value Value of parameter
|
|
*/
|
|
void set_custom_parameter(const std::string& name, const std::string& value);
|
|
|
|
std::string get_custom_parameter(const std::string& name) const override;
|
|
|
|
void set_normal_parameter(const std::string& name, const std::string& value);
|
|
|
|
/**
|
|
* @brief Serialize a server to a file
|
|
*
|
|
* This converts @c server into an INI format file. This allows created servers
|
|
* to be persisted to disk. This will replace any existing files with the same
|
|
* name.
|
|
*
|
|
* @return False if the serialization of the server fails, true if it was successful
|
|
*/
|
|
bool serialize() const;
|
|
|
|
/**
|
|
* Update server-specific monitor username. Does not affect existing monitor connections,
|
|
* only new connections will use the updated username.
|
|
*
|
|
* @param username New username. Must not be too long.
|
|
* @return True, if value was updated
|
|
*/
|
|
bool set_monitor_user(const std::string& user);
|
|
|
|
/**
|
|
* Update server-specific monitor password. Does not affect existing monitor connections,
|
|
* only new connections will use the updated password.
|
|
*
|
|
* @param password New password. Must not be too long.
|
|
* @return True, if value was updated
|
|
*/
|
|
bool set_monitor_password(const std::string& password);
|
|
|
|
std::string monitor_user() const;
|
|
std::string monitor_password() const;
|
|
|
|
/**
|
|
* @brief Set the disk space threshold of the server
|
|
*
|
|
* @param server The server.
|
|
* @param disk_space_threshold The disk space threshold as specified in the config file.
|
|
*
|
|
* @return True, if the provided string is valid and the threshold could be set.
|
|
*/
|
|
bool set_disk_space_threshold(const std::string& disk_space_threshold);
|
|
|
|
/**
|
|
* Print all servers
|
|
*
|
|
* Designed to be called within a debugger session in order
|
|
* to display all active servers within the gateway
|
|
*/
|
|
static void printAllServers();
|
|
|
|
/**
|
|
* Print details of an individual server
|
|
*/
|
|
void printServer();
|
|
|
|
static std::unique_ptr<ResultSet> getList();
|
|
|
|
/**
|
|
* @brief Convert a server to JSON format
|
|
*
|
|
* @param host Hostname of this server as given in request
|
|
* @return JSON representation of server or NULL if an error occurred
|
|
*/
|
|
json_t* to_json(const char* host);
|
|
|
|
void* auth_instance()
|
|
{
|
|
return m_auth_instance;
|
|
}
|
|
|
|
DCB** persistent = nullptr; /**< List of unused persistent connections to the server */
|
|
|
|
private:
|
|
struct Settings
|
|
{
|
|
mutable std::mutex lock; /**< Protects array-like settings from concurrent access */
|
|
|
|
/** All config settings in text form. This is only read and written from the admin thread
|
|
* so no need for locking. */
|
|
MXS_CONFIG_PARAMETER all_parameters;
|
|
|
|
std::string protocol; /**< Backend protocol module name. Does not change so needs no locking. */
|
|
std::string authenticator; /**< Authenticator module name. Does not change so needs no locking. */
|
|
|
|
char monuser[MAX_MONUSER_LEN + 1] = {'\0'}; /**< Monitor username, overrides monitor setting */
|
|
char monpw[MAX_MONPW_LEN + 1] = {'\0'}; /**< Monitor password, overrides monitor setting */
|
|
|
|
long persistpoolmax = 0; /**< Maximum size of persistent connections pool */
|
|
long persistmaxtime = 0; /**< Maximum number of seconds connection can live */
|
|
|
|
int64_t rank; /*< The ranking of this server, used to prioritize certain servers over others */
|
|
|
|
/** Disk space thresholds. Can be queried from modules at any time so access must be protected
|
|
* by mutex. */
|
|
DiskSpaceLimits disk_space_limits;
|
|
|
|
/** Additional custom parameters which may affect routing decisions or a monitor.
|
|
* Can be queried from modules at any time so access must be protected by mutex. */
|
|
MXS_CONFIG_PARAMETER custom_parameters;
|
|
};
|
|
|
|
/**
|
|
* Stores server version info. Encodes/decodes to/from the version number received from the server.
|
|
* Also stores the version string and parses information from it. */
|
|
class VersionInfo
|
|
{
|
|
public:
|
|
|
|
/**
|
|
* Reads in version data. Deduces server type from version string.
|
|
*
|
|
* @param version_num Version number from server
|
|
* @param version_string Version string from server
|
|
*/
|
|
void set(uint64_t version_num, const std::string& version_string);
|
|
|
|
Version version_num() const;
|
|
Type type() const;
|
|
std::string version_string() const;
|
|
|
|
private:
|
|
mutable std::mutex m_lock; /**< Protects against concurrent writing */
|
|
|
|
Version m_version_num; /**< Numeric version */
|
|
Type m_type = Type::MARIADB; /**< Server type */
|
|
char m_version_str[MAX_VERSION_LEN + 1] = {'\0'};/**< Server version string */
|
|
};
|
|
|
|
const std::string m_name; /**< Server config name */
|
|
Settings m_settings; /**< Server settings */
|
|
VersionInfo m_info; /**< Server version and type information */
|
|
|
|
void* m_auth_instance = nullptr; /**< Authenticator instance data */
|
|
};
|