Storage for High Availability configuration. More...

#include <ha_config.h>

Classes
class	PeerConfig
	HA peer configuration. More...

class	StateConfig
	Configuration specific to a single HA state. More...

class	StateMachineConfig
	State machine configuration information. More...

Public Types
enum	HAMode { LOAD_BALANCING , HOT_STANDBY , PASSIVE_BACKUP }
	Mode of operation. More...

typedef std::map< std::string, PeerConfigPtr >	PeerConfigMap
	Map of the servers' configurations.

typedef boost::shared_ptr< PeerConfig >	PeerConfigPtr
	Pointer to the server's configuration.

typedef boost::shared_ptr< StateConfig >	StateConfigPtr
	Pointer to the state configuration.

typedef boost::shared_ptr< StateMachineConfig >	StateMachineConfigPtr
	Pointer to a state machine configuration.

Public Member Functions
	HAConfig ()
	Constructor.

bool	amAllowingCommRecovery () const
	Convenience function checking if communication recovery is allowed.

bool	amSendingLeaseUpdates () const
	Returns boolean flag indicating whether lease updates should be sent to the partner.

bool	amSyncingLeases () const
	Returns boolean flag indicating whether the active servers should synchronize their lease databases upon startup.

bool	amWaitingBackupAck () const
	Checks if the server is configured to wait for the acknowledgments to the lease updates from the backup server or not.

PeerConfigMap	getAllServersConfig () const
	Returns configurations of all servers.

util::Optional< std::string >	getCertFile () const
	Returns global cert-file.

uint32_t	getDelayedUpdatesLimit () const
	Returns the maximum number of lease updates which can be held unsent in the communication-recovery state.

bool	getEnableMultiThreading ()
	Checks if the server is configured for multi-threaded operation.

PeerConfigPtr	getFailoverPeerConfig () const
	Returns configuration of the partner which takes part in failover.

HAMode	getHAMode () const
	Returns mode of operation.

uint32_t	getHeartbeatDelay () const
	Returns heartbeat delay in milliseconds.

uint32_t	getHttpClientThreads ()
	Fetches the number of threads the HTTP client should use.

bool	getHttpDedicatedListener ()
	Checks if the server is configured to use its own HTTP listener.

uint32_t	getHttpListenerThreads ()
	Fetches the number of threads the HTTP listener should use.

util::Optional< std::string >	getKeyFile () const
	Returns global key-file.

uint32_t	getMaxAckDelay () const
	Returns maximum time for a client trying to communicate with DHCP server to complete the transaction.

uint32_t	getMaxRejectedLeaseUpdates () const
	Returns a maximum number of clients for whom lease updates failed due to other than general error.

uint32_t	getMaxResponseDelay () const
	Returns max response delay.

uint32_t	getMaxUnackedClients () const
	Returns maximum number of clients which may fail to communicate with the DHCP server before entering partner down state.

PeerConfigMap	getOtherServersConfig () const
	Returns configuration of other servers.

PeerConfigPtr	getPeerConfig (const std::string &name) const
	Returns configuration of the specified server.

bool	getRequireClientCerts () const
	Returns require-client-certs.

bool	getRestrictCommands () const
	Returns restrict-commands.

StateMachineConfigPtr	getStateMachineConfig () const
	Returns state machine configuration.

uint32_t	getSyncPageLimit () const
	Returns maximum number of leases per page to be fetched during database synchronization.

uint32_t	getSyncTimeout () const
	Returns timeout for lease database synchronization.

PeerConfigPtr	getThisServerConfig () const
	Returns configuration of this server.

std::string	getThisServerName () const
	Returns name of this server.

util::Optional< std::string >	getTrustAnchor () const
	Returns global trust-anchor.

PeerConfigPtr	selectNextPeerConfig (const std::string &name)
	Creates and returns pointer to the new peer's configuration.

void	setCertFile (const util::Optional< std::string > &cert)
	Sets global cert-file.

void	setDelayedUpdatesLimit (const uint32_t delayed_updates_limit)
	Sets new limit for the number of lease updates to be held unsent in the communication-recovery state.

void	setEnableMultiThreading (bool enable_multi_threading)
	Sets whether or not server is configured for multi-threaded operation.

void	setHAMode (const std::string &ha_mode)
	Sets new mode of operation.

void	setHeartbeatDelay (const uint32_t heartbeat_delay)
	Sets new heartbeat delay in milliseconds.

void	setHttpClientThreads (uint32_t http_client_threads)
	Sets the number of threads the HTTP client should use.

void	setHttpDedicatedListener (bool http_dedicated_listener)
	Sets whether or not the server is configured to use its own HTTP listener.

void	setHttpListenerThreads (uint32_t http_listener_threads)
	Sets the number of threads the HTTP listener should use.

void	setKeyFile (const util::Optional< std::string > &key)
	Sets global key-file.

void	setMaxAckDelay (const uint32_t max_ack_delay)
	Sets maximum time for a client trying to communicate with DHCP server to completed the transaction.

void	setMaxRejectedLeaseUpdates (const uint32_t max_rejected_lease_updates)
	Sets the maximum number of clients for whom the lease updates can fail due to other than general error.

void	setMaxResponseDelay (const uint32_t max_response_delay)
	Sets new max response delay.

void	setMaxUnackedClients (const uint32_t max_unacked_clients)
	Set maximum number of clients which may fail to communicate with the DHCP server before entering partner down state.

void	setRequireClientCerts (bool flag)
	Sets require-client-certs.

void	setRestrictCommands (bool flag)
	Sets restrict-commands.

void	setSendLeaseUpdates (const bool send_lease_updates)
	Sets boolean flag indicating whether lease updates should be sent to the partner.

void	setSyncLeases (const bool sync_leases)
	Sets boolean flag indicating whether the active servers should synchronize their lease databases upon startup.

void	setSyncPageLimit (const uint32_t sync_page_limit)
	Sets new page limit size for leases fetched from the partner during database synchronization.

void	setSyncTimeout (const uint32_t sync_timeout)
	Sets new lease database syncing timeout in milliseconds.

void	setThisServerName (const std::string &this_server_name)
	Sets name of this server.

void	setTrustAnchor (const util::Optional< std::string > &ca)
	Sets global trust-anchor.

void	setWaitBackupAck (const bool wait_backup_ack)
	Configures the server to wait/not wait for the lease update acknowledgments from the backup servers.

void	validate ()
	Validates configuration.

Static Public Member Functions
static HAConfigPtr	create ()
	Instantiates a HAConfig.

static std::string	getSubnetServerName (const dhcp::ConstSubnetPtr &subnet)
	Convenience function extracting a value of the ha-server-name parameter from a subnet context.

static std::string	HAModeToString (const HAMode &ha_mode)
	Returns HA mode name.

static HAMode	stringToHAMode (const std::string &ha_mode)
	Decodes HA mode provided as string.

Public Attributes
util::Optional< std::string >	cert_file_
	Certificate file.

uint32_t	delayed_updates_limit_
	Maximum number of lease updates held for later send in communication-recovery.

bool	enable_multi_threading_
	Enable multi-threading.

HAMode	ha_mode_
	Mode of operation.

uint32_t	heartbeat_delay_
	Heartbeat delay in milliseconds.

uint32_t	http_client_threads_
	Number of HTTP client threads.

bool	http_dedicated_listener_
	Enable use of own HTTP listener.

uint32_t	http_listener_threads_
	Number of HTTP listener threads.

util::Optional< std::string >	key_file_
	Private key file.

uint32_t	max_ack_delay_
	Maximum DHCP message ack delay.

uint32_t	max_rejected_lease_updates_
	Limit of rejected lease updates before termination.

uint32_t	max_response_delay_
	Max delay in response to heartbeats.

uint32_t	max_unacked_clients_
	Maximum number of unacked clients.

PeerConfigMap	peers_
	Map of peers' configurations.

bool	require_client_certs_
	Require client certs flag.

bool	restrict_commands_
	Restrict commands to HA flag.

bool	send_lease_updates_
	Send lease updates to partner?

StateMachineConfigPtr	state_machine_
	State machine configuration.

bool	sync_leases_
	Synchronize databases on startup?

uint32_t	sync_page_limit_
	Page size limit while synchronizing leases.

uint32_t	sync_timeout_
	Timeout for syncing lease database (ms)

std::string	this_server_name_
	This server name.

util::Optional< std::string >	trust_anchor_
	Trust anchor.

bool	wait_backup_ack_
	Wait for lease update ack from backup?

Detailed Description

Storage for High Availability configuration.

Definition at line 46 of file ha_config.h.

Member Typedef Documentation

◆ PeerConfigMap

std::map<std::string, PeerConfigPtr> isc::ha::HAConfig::PeerConfigMap

Map of the servers' configurations.

Definition at line 245 of file ha_config.h.

◆ PeerConfigPtr

boost::shared_ptr<PeerConfig> isc::ha::HAConfig::PeerConfigPtr

Pointer to the server's configuration.

Definition at line 242 of file ha_config.h.

◆ StateConfigPtr

boost::shared_ptr<StateConfig> isc::ha::HAConfig::StateConfigPtr

Pointer to the state configuration.

Definition at line 293 of file ha_config.h.

◆ StateMachineConfigPtr

boost::shared_ptr<StateMachineConfig> isc::ha::HAConfig::StateMachineConfigPtr

Pointer to a state machine configuration.

Definition at line 325 of file ha_config.h.

Member Enumeration Documentation

◆ HAMode

enum isc::ha::HAConfig::HAMode

Mode of operation.

Currently supported modes are:

load-balancing
hot-standby
passive-backup

Enumerator
LOAD_BALANCING
HOT_STANDBY
PASSIVE_BACKUP

Definition at line 55 of file ha_config.h.

Constructor & Destructor Documentation

◆ HAConfig()

isc::ha::HAConfig::HAConfig ( )

Constructor.

Definition at line 165 of file ha_config.cc.

Member Function Documentation

◆ amAllowingCommRecovery()

bool isc::ha::HAConfig::amAllowingCommRecovery ( ) const

inline

Convenience function checking if communication recovery is allowed.

Communication recovery is only allowed in load-balancing configurations. It is enabled by setting delayed-updates-limit to a value greater than 0.

Returns: true if communication recovery is enabled, false otherwise.

Definition at line 491 of file ha_config.h.

References delayed_updates_limit_.

◆ amSendingLeaseUpdates()

bool isc::ha::HAConfig::amSendingLeaseUpdates ( ) const

inline

Returns boolean flag indicating whether lease updates should be sent to the partner.

Definition at line 386 of file ha_config.h.

References send_lease_updates_.

◆ amSyncingLeases()

bool isc::ha::HAConfig::amSyncingLeases ( ) const

inline

Returns boolean flag indicating whether the active servers should synchronize their lease databases upon startup.

Definition at line 405 of file ha_config.h.

References sync_leases_.

◆ amWaitingBackupAck()

bool isc::ha::HAConfig::amWaitingBackupAck ( ) const

inline

Checks if the server is configured to wait for the acknowledgments to the lease updates from the backup server or not.

Returns: true if the server is configured to wait for the acknowledgments or false otherwise.

Definition at line 617 of file ha_config.h.

References wait_backup_ack_.

◆ create()

HAConfigPtr isc::ha::HAConfig::create ( )

static

Instantiates a HAConfig.

Definition at line 178 of file ha_config.cc.

◆ getAllServersConfig()

PeerConfigMap isc::ha::HAConfig::getAllServersConfig ( ) const

inline

Returns configurations of all servers.

Returns: Map of pointers to the servers' configurations.

Definition at line 780 of file ha_config.h.

References peers_.

◆ getCertFile()

util::Optional< std::string > isc::ha::HAConfig::getCertFile ( ) const

inline

Returns global cert-file.

Definition at line 697 of file ha_config.h.

References cert_file_.

◆ getDelayedUpdatesLimit()

uint32_t isc::ha::HAConfig::getDelayedUpdatesLimit ( ) const

inline

Returns the maximum number of lease updates which can be held unsent in the communication-recovery state.

If the server is in the communication-recovery state it is unable to send lease updates to the partner. Instead it keeps lease updates, hoping to send them when the communication is resumed. This value designates a limit of how many such updates can be held. If this number is exceeded the server continues to respond to the clients but will have to go through regular lease database synchronization when the communication is resumed.

Returns: Limit of the lease backlog size in communication-recovery.

Definition at line 464 of file ha_config.h.

References delayed_updates_limit_.

◆ getEnableMultiThreading()

bool isc::ha::HAConfig::getEnableMultiThreading ( )

inline

Checks if the server is configured for multi-threaded operation.

Returns: true if the server is configured for multi-threaded operation

Definition at line 624 of file ha_config.h.

References enable_multi_threading_.

◆ getFailoverPeerConfig()

HAConfig::PeerConfigPtr isc::ha::HAConfig::getFailoverPeerConfig ( ) const

Returns configuration of the partner which takes part in failover.

The server for which the configuration is returned is a "primary", "secondary" or "standby". This method is typically used to locate the configuration of the server to which heartbeat command is to be sent.

Returns: Pointer to the partner's configuration.

Exceptions

InvalidOperation if there is no suitable configuration found.

Definition at line 258 of file ha_config.cc.

References isc::ha::HAConfig::PeerConfig::BACKUP, getOtherServersConfig(), getThisServerName(), and isc_throw.

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◆ getHAMode()

HAMode isc::ha::HAConfig::getHAMode ( ) const

inline

Returns mode of operation.

Definition at line 357 of file ha_config.h.

References ha_mode_.

◆ getHeartbeatDelay()

uint32_t isc::ha::HAConfig::getHeartbeatDelay ( ) const

inline

Returns heartbeat delay in milliseconds.

This value indicates the delay in sending a heartbeat command after last heartbeat or some other command to the partner. A value of zero disables the heartbeat.

Returns: Heartbeat delay in milliseconds.

Definition at line 502 of file ha_config.h.

References heartbeat_delay_.

◆ getHttpClientThreads()

uint32_t isc::ha::HAConfig::getHttpClientThreads ( )

inline

Fetches the number of threads the HTTP client should use.

Returns: number of threads the client is configured to use.

Definition at line 673 of file ha_config.h.

References http_client_threads_.

◆ getHttpDedicatedListener()

bool isc::ha::HAConfig::getHttpDedicatedListener ( )

inline

Checks if the server is configured to use its own HTTP listener.

When this is true, the server should instantiate an HTTP listener instance which listens on this server's URL. If false, this server will rely on a kea-control-agent.

Returns: true if the server is configured to use its own HTTP listener.

Definition at line 643 of file ha_config.h.

References http_dedicated_listener_.

◆ getHttpListenerThreads()

uint32_t isc::ha::HAConfig::getHttpListenerThreads ( )

inline

Fetches the number of threads the HTTP listener should use.

Returns: number of threads the listener is configured to use.

Definition at line 659 of file ha_config.h.

References http_listener_threads_.

◆ getKeyFile()

util::Optional< std::string > isc::ha::HAConfig::getKeyFile ( ) const

inline

Returns global key-file.

Definition at line 709 of file ha_config.h.

References key_file_.

◆ getMaxAckDelay()

uint32_t isc::ha::HAConfig::getMaxAckDelay ( ) const

inline

Returns maximum time for a client trying to communicate with DHCP server to complete the transaction.

Returns: Maximum delay in milliseconds.

Definition at line 541 of file ha_config.h.

References max_ack_delay_.

◆ getMaxRejectedLeaseUpdates()

uint32_t isc::ha::HAConfig::getMaxRejectedLeaseUpdates ( ) const

inline

Returns a maximum number of clients for whom lease updates failed due to other than general error.

A lease update may fail due to a conflict with the partner's configuration. The server distinguishes such errors from general errors (e.g., related to communication issues) to avoid transitioning to the partner-down state when there is in fact a problem with a lease or the configuration. On the other hand, if such problematic leases accumulate, the server can no longer provide the HA service and should transition to the terminated state. Consequently, an administrator must fix the configuration problem. This function returns the maximum number of clients with conflicting leases before the server transitions to the terminated state.

Returns: Maximum number of rejected lease updates before the server terminates the HA service.

Definition at line 584 of file ha_config.h.

References max_rejected_lease_updates_.

◆ getMaxResponseDelay()

uint32_t isc::ha::HAConfig::getMaxResponseDelay ( ) const

inline

Returns max response delay.

Max response delay is the maximum time that the server is waiting for its partner to respond to the heartbeats (and lease updates) before it assumes the communications interrupted state.

Definition at line 522 of file ha_config.h.

References max_response_delay_.

◆ getMaxUnackedClients()

uint32_t isc::ha::HAConfig::getMaxUnackedClients ( ) const

inline

Returns maximum number of clients which may fail to communicate with the DHCP server before entering partner down state.

Returns: Maximum number of clients.

Definition at line 557 of file ha_config.h.

References max_unacked_clients_.

◆ getOtherServersConfig()

HAConfig::PeerConfigMap isc::ha::HAConfig::getOtherServersConfig ( ) const

Returns configuration of other servers.

Returns a map of pointers to the configuration of all servers except this.

Returns: Map of pointers to the servers' configurations.

Definition at line 276 of file ha_config.cc.

References isc::data::copy(), getThisServerName(), and peers_.

Referenced by getFailoverPeerConfig().

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◆ getPeerConfig()

HAConfig::PeerConfigPtr isc::ha::HAConfig::getPeerConfig ( const std::string & name ) const

Returns configuration of the specified server.

Parameters

name	Server name.

Returns: Pointer to the partner's configuration.

Exceptions

InvalidOperation if there is no suitable configuration found.

Definition at line 248 of file ha_config.cc.

References isc_throw, and peers_.

Referenced by getThisServerConfig().

◆ getRequireClientCerts()

bool isc::ha::HAConfig::getRequireClientCerts ( ) const

inline

Returns require-client-certs.

Definition at line 721 of file ha_config.h.

References require_client_certs_.

Referenced by validate().

◆ getRestrictCommands()

bool isc::ha::HAConfig::getRestrictCommands ( ) const

inline

Returns restrict-commands.

Definition at line 733 of file ha_config.h.

References restrict_commands_.

◆ getStateMachineConfig()

StateMachineConfigPtr isc::ha::HAConfig::getStateMachineConfig ( ) const

inline

Returns state machine configuration.

Returns: Pointer to the state machine configuration.

Definition at line 787 of file ha_config.h.

References state_machine_.

◆ getSubnetServerName()

std::string isc::ha::HAConfig::getSubnetServerName ( const dhcp::ConstSubnetPtr & subnet )

static

Convenience function extracting a value of the ha-server-name parameter from a subnet context.

If the subnet does not contain this parameter it tries to find this parameter in the shared network.

Parameters

subnet pointer to the subnet.

Returns: ha-server-name parameter value or an empty string if it was not found.

Exceptions

BadValue if the parameter is not a string or is empty.

Definition at line 524 of file ha_config.cc.

References isc_throw, isc::data::Element::map, and isc::data::Element::string.

Referenced by isc::ha::HAImpl::subnet4Select(), and isc::ha::HAImpl::subnet6Select().

◆ getSyncPageLimit()

uint32_t isc::ha::HAConfig::getSyncPageLimit ( ) const

inline

Returns maximum number of leases per page to be fetched during database synchronization.

Returns: Maximum number of leases per page.

Definition at line 440 of file ha_config.h.

References sync_page_limit_.

◆ getSyncTimeout()

uint32_t isc::ha::HAConfig::getSyncTimeout ( ) const

inline

Returns timeout for lease database synchronization.

Returns: Timeout in milliseconds.

Definition at line 425 of file ha_config.h.

References sync_timeout_.

◆ getThisServerConfig()

HAConfig::PeerConfigPtr isc::ha::HAConfig::getThisServerConfig ( ) const

Returns configuration of this server.

Returns: Pointer to the configuration of this server.

Definition at line 271 of file ha_config.cc.

References getPeerConfig(), and getThisServerName().

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◆ getThisServerName()

std::string isc::ha::HAConfig::getThisServerName ( ) const

inline

Returns name of this server.

Definition at line 346 of file ha_config.h.

References this_server_name_.

Referenced by getFailoverPeerConfig(), getOtherServersConfig(), getThisServerConfig(), and validate().

◆ getTrustAnchor()

util::Optional< std::string > isc::ha::HAConfig::getTrustAnchor ( ) const

inline

Returns global trust-anchor.

Definition at line 685 of file ha_config.h.

References trust_anchor_.

◆ HAModeToString()

std::string isc::ha::HAConfig::HAModeToString ( const HAMode & ha_mode )

static

Returns HA mode name.

Parameters

ha_mode HA mode which name should be returned.

Returns: HA mode name.

Definition at line 233 of file ha_config.cc.

References HOT_STANDBY, LOAD_BALANCING, and PASSIVE_BACKUP.

Referenced by isc::ha::HAService::HAService(), and isc::ha::HAImpl::commandProcessed().

◆ selectNextPeerConfig()

HAConfig::PeerConfigPtr isc::ha::HAConfig::selectNextPeerConfig ( const std::string & name )

Creates and returns pointer to the new peer's configuration.

This method is called during peers configuration parsing, when the parser starts reading configuration of the next peer on the list. It will store parsed values into this object.

Parameters

name	Name of the server for which new configuration should be created.

Exceptions

BadValue if there is already a configuration for the given server name.

Definition at line 183 of file ha_config.cc.

References isc_throw, and peers_.

◆ setCertFile()

void isc::ha::HAConfig::setCertFile ( const util::Optional< std::string > & cert )

inline

Sets global cert-file.

Parameters

cert	Certificate file name.

Definition at line 704 of file ha_config.h.

References cert_file_.

◆ setDelayedUpdatesLimit()

void isc::ha::HAConfig::setDelayedUpdatesLimit ( const uint32_t delayed_updates_limit )

inline

Sets new limit for the number of lease updates to be held unsent in the communication-recovery state.

If the server is in the communication-recovery state it is unable to send lease updates to the partner. Instead it keeps lease updates, hoping to send them when the communication is resumed. This value designates a limit of how many such updates can be held. If this number is exceeded the server continues to respond to the clients but will have to go through regular lease database synchronization when the communication is resumed.

Parameters

delayed_updates_limit new limit.

Definition at line 480 of file ha_config.h.

References delayed_updates_limit_.

◆ setEnableMultiThreading()

void isc::ha::HAConfig::setEnableMultiThreading ( bool enable_multi_threading )

inline

Sets whether or not server is configured for multi-threaded operation.

Parameters

enable_multi_threading boolean flag that enables multi-threaded operation when true.

Definition at line 632 of file ha_config.h.

References enable_multi_threading_.

◆ setHAMode()

void isc::ha::HAConfig::setHAMode ( const std::string & ha_mode )

Sets new mode of operation.

The following modes of operation are supported:

load-balancing
hot-standby

Parameters

ha_mode High Availability mode operation in textual form.

Exceptions

BadValue if non-supported mode of operation has been specified.

Definition at line 213 of file ha_config.cc.

References ha_mode_, and stringToHAMode().

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◆ setHeartbeatDelay()

void isc::ha::HAConfig::setHeartbeatDelay ( const uint32_t heartbeat_delay )

inline

Sets new heartbeat delay in milliseconds.

This value indicates the delay in sending a heartbeat command after last heartbeat or some other command to the partner. A value of zero disables the heartbeat.

Parameters

heartbeat_delay new heartbeat delay value.

Definition at line 513 of file ha_config.h.

References heartbeat_delay_.

◆ setHttpClientThreads()

void isc::ha::HAConfig::setHttpClientThreads ( uint32_t http_client_threads )

inline

Sets the number of threads the HTTP client should use.

Parameters

http_client_threads number of threads the client should use.

Definition at line 680 of file ha_config.h.

References http_client_threads_.

◆ setHttpDedicatedListener()

void isc::ha::HAConfig::setHttpDedicatedListener ( bool http_dedicated_listener )

inline

Sets whether or not the server is configured to use its own HTTP listener.

Parameters

http_dedicated_listener flag that enables the use of a dedicated listener when true.

Definition at line 652 of file ha_config.h.

References http_dedicated_listener_.

◆ setHttpListenerThreads()

void isc::ha::HAConfig::setHttpListenerThreads ( uint32_t http_listener_threads )

inline

Sets the number of threads the HTTP listener should use.

Parameters

http_listener_threads number of threads the listener should use.

Definition at line 666 of file ha_config.h.

References http_listener_threads_.

◆ setKeyFile()

void isc::ha::HAConfig::setKeyFile ( const util::Optional< std::string > & key )

inline

Sets global key-file.

Parameters

key	Private key file name.

Definition at line 716 of file ha_config.h.

References key_file_.

◆ setMaxAckDelay()

void isc::ha::HAConfig::setMaxAckDelay ( const uint32_t max_ack_delay )

inline

Sets maximum time for a client trying to communicate with DHCP server to completed the transaction.

Parameters

max_ack_delay maximum time in milliseconds.

Definition at line 549 of file ha_config.h.

References max_ack_delay_.

◆ setMaxRejectedLeaseUpdates()

void isc::ha::HAConfig::setMaxRejectedLeaseUpdates ( const uint32_t max_rejected_lease_updates )

inline

Sets the maximum number of clients for whom the lease updates can fail due to other than general error.

The service is terminated when the actual number of rejected clients is equal or greater that number.

Parameters

max_rejected_lease_updates maximum number of distinct clients for which the lease updates can fail before the server terminates the HA service. A special value of 0 configures the server to never transition to the terminated state as a result of the lease updates issues.

Definition at line 598 of file ha_config.h.

References max_rejected_lease_updates_.

◆ setMaxResponseDelay()

void isc::ha::HAConfig::setMaxResponseDelay ( const uint32_t max_response_delay )

inline

Sets new max response delay.

Max response delay is the maximum time that the server is waiting for its partner to respond to the heartbeats (and lease updates) before it assumes the communications interrupted state.

Parameters

max_response_delay

Definition at line 533 of file ha_config.h.

References max_response_delay_.

◆ setMaxUnackedClients()

void isc::ha::HAConfig::setMaxUnackedClients ( const uint32_t max_unacked_clients )

inline

Set maximum number of clients which may fail to communicate with the DHCP server before entering partner down state.

Parameters

max_unacked_clients maximum number of clients.

Definition at line 565 of file ha_config.h.

References max_unacked_clients_.

◆ setRequireClientCerts()

void isc::ha::HAConfig::setRequireClientCerts ( bool flag )

inline

Sets require-client-certs.

Parameters

flag	Require client certs flag value.

Definition at line 728 of file ha_config.h.

References require_client_certs_.

◆ setRestrictCommands()

void isc::ha::HAConfig::setRestrictCommands ( bool flag )

inline

Sets restrict-commands.

Parameters

flag	Restrict commands to HA flag value.

Definition at line 740 of file ha_config.h.

References restrict_commands_.

◆ setSendLeaseUpdates()

void isc::ha::HAConfig::setSendLeaseUpdates ( const bool send_lease_updates )

inline

Sets boolean flag indicating whether lease updates should be sent to the partner.

Disabling lease updates is useful in cases when lease database replication is enabled, e.g. MySQL database replication. The database itself takes care of updating the backup database with new data. Sending lease updates is enabled by default.

Parameters

send_lease_updates new value for the flag.

Definition at line 399 of file ha_config.h.

References send_lease_updates_.

◆ setSyncLeases()

void isc::ha::HAConfig::setSyncLeases ( const bool sync_leases )

inline

Sets boolean flag indicating whether the active servers should synchronize their lease databases upon startup.

Disabling lease database synchronization is useful in cases when lease database replication is enabled. See the description of the setSendLeaseUpdates. Lease database synchronization is enabled by default on active HA servers.

Parameters

sync_leases new value for the flag.

Definition at line 418 of file ha_config.h.

References sync_leases_.

◆ setSyncPageLimit()

void isc::ha::HAConfig::setSyncPageLimit ( const uint32_t sync_page_limit )

inline

Sets new page limit size for leases fetched from the partner during database synchronization.

Parameters

sync_page_limit New page limit value.

Definition at line 448 of file ha_config.h.

References sync_page_limit_.

◆ setSyncTimeout()

void isc::ha::HAConfig::setSyncTimeout ( const uint32_t sync_timeout )

inline

Sets new lease database syncing timeout in milliseconds.

Parameters

sync_timeout new timeout for lease database synchronization.

Definition at line 432 of file ha_config.h.

References sync_timeout_.

◆ setThisServerName()

void isc::ha::HAConfig::setThisServerName ( const std::string & this_server_name )

Sets name of this server.

Parameters

this_server_name This server name.

Exceptions

BadValue If the provided server name is empty.

Definition at line 201 of file ha_config.cc.

References isc_throw, this_server_name_, and isc::util::str::trim().

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◆ setTrustAnchor()

void isc::ha::HAConfig::setTrustAnchor ( const util::Optional< std::string > & ca )

inline

Sets global trust-anchor.

Parameters

ca	Trust anchor aka Certificate Authority.

Definition at line 692 of file ha_config.h.

References trust_anchor_.

◆ setWaitBackupAck()

void isc::ha::HAConfig::setWaitBackupAck ( const bool wait_backup_ack )

inline

Configures the server to wait/not wait for the lease update acknowledgments from the backup servers.

Parameters

wait_backup_ack indicates that the server should wait for the lease update acknowledgments from the backup servers (if true) or that it should not (if false).

Definition at line 608 of file ha_config.h.

References wait_backup_ack_.

◆ stringToHAMode()

HAConfig::HAMode isc::ha::HAConfig::stringToHAMode ( const std::string & ha_mode )

static

Decodes HA mode provided as string.

Parameters

ha_mode HA mode as string.

Returns: HA mode converted from string.

Exceptions

BadValue if specified HA mode name is unsupported.

Definition at line 218 of file ha_config.cc.

References HOT_STANDBY, isc_throw, LOAD_BALANCING, and PASSIVE_BACKUP.

Referenced by setHAMode().

◆ validate()

void isc::ha::HAConfig::validate ( )

Validates configuration.

In addition to sanity checking the configuration, it will check HA+MT configuration against Core multi-threading configuration add adjust HA+MT values as follows:

If DHCP multi-threading is disabled, HA+MT will be disabled.
If http-listener-threads is 0, it will be replaced with the number of DHCP threads
If http-client-threads is 0, it will be replaced with the number of DHCP threads

As a side effect it fills the TLS context of peers when TLS is enabled.

Exceptions

HAConfigValidationError if configuration is invalid.

Definition at line 283 of file ha_config.cc.

References cert_file_, delayed_updates_limit_, isc::util::MultiThreadingMgr::detectThreadCount(), enable_multi_threading_, isc::dhcp::CfgMultiThreading::extract(), isc::util::Optional< T >::get(), getRequireClientCerts(), isc::dhcp::CfgMgr::getStagingCfg(), getThisServerName(), isc::ha::HA_CONFIG_DHCP_MT_DISABLED, isc::ha::HA_CONFIG_DHCP_MT_DISABLED_AND_KEA_MT_ENABLED, isc::ha::HA_CONFIG_SYSTEM_MT_UNSUPPORTED, isc::ha::ha_logger, ha_mode_, HOT_STANDBY, http_client_threads_, http_listener_threads_, isc::http::Url::HTTPS, isc::dhcp::CfgMgr::instance(), isc_throw, key_file_, LOAD_BALANCING, LOG_INFO, LOG_WARN, PASSIVE_BACKUP, peers_, isc::ha::HAConfig::PeerConfig::PRIMARY, isc::ha::HAConfig::PeerConfig::SECONDARY, isc::ha::HAConfig::PeerConfig::STANDBY, trust_anchor_, isc::util::Optional< T >::unspecified(), wait_backup_ack_, and isc::Exception::what().

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Member Data Documentation

◆ cert_file_

util::Optional<std::string> isc::ha::HAConfig::cert_file_

Certificate file.

Definition at line 839 of file ha_config.h.

Referenced by getCertFile(), setCertFile(), and validate().

◆ delayed_updates_limit_

uint32_t isc::ha::HAConfig::delayed_updates_limit_

Maximum number of lease updates held for later send in communication-recovery.

Definition at line 826 of file ha_config.h.

Referenced by amAllowingCommRecovery(), getDelayedUpdatesLimit(), setDelayedUpdatesLimit(), and validate().

◆ enable_multi_threading_

bool isc::ha::HAConfig::enable_multi_threading_

Enable multi-threading.

Definition at line 834 of file ha_config.h.

Referenced by getEnableMultiThreading(), setEnableMultiThreading(), and validate().

◆ ha_mode_

HAMode isc::ha::HAConfig::ha_mode_

Mode of operation.

Definition at line 820 of file ha_config.h.

Referenced by getHAMode(), setHAMode(), and validate().

◆ heartbeat_delay_

uint32_t isc::ha::HAConfig::heartbeat_delay_

Heartbeat delay in milliseconds.

Definition at line 828 of file ha_config.h.

Referenced by getHeartbeatDelay(), and setHeartbeatDelay().

◆ http_client_threads_

uint32_t isc::ha::HAConfig::http_client_threads_

Number of HTTP client threads.

Definition at line 837 of file ha_config.h.

Referenced by getHttpClientThreads(), setHttpClientThreads(), and validate().

◆ http_dedicated_listener_

bool isc::ha::HAConfig::http_dedicated_listener_

Enable use of own HTTP listener.

Definition at line 835 of file ha_config.h.

Referenced by getHttpDedicatedListener(), and setHttpDedicatedListener().

◆ http_listener_threads_

uint32_t isc::ha::HAConfig::http_listener_threads_

Number of HTTP listener threads.

Definition at line 836 of file ha_config.h.

Referenced by getHttpListenerThreads(), setHttpListenerThreads(), and validate().

◆ key_file_

util::Optional<std::string> isc::ha::HAConfig::key_file_

Private key file.

Definition at line 840 of file ha_config.h.

Referenced by getKeyFile(), setKeyFile(), and validate().

◆ max_ack_delay_

uint32_t isc::ha::HAConfig::max_ack_delay_

Maximum DHCP message ack delay.

Definition at line 830 of file ha_config.h.

Referenced by getMaxAckDelay(), and setMaxAckDelay().

◆ max_rejected_lease_updates_

uint32_t isc::ha::HAConfig::max_rejected_lease_updates_

Limit of rejected lease updates before termination.

Definition at line 832 of file ha_config.h.

Referenced by getMaxRejectedLeaseUpdates(), and setMaxRejectedLeaseUpdates().

◆ max_response_delay_

uint32_t isc::ha::HAConfig::max_response_delay_

Max delay in response to heartbeats.

Definition at line 829 of file ha_config.h.

Referenced by getMaxResponseDelay(), and setMaxResponseDelay().

◆ max_unacked_clients_

uint32_t isc::ha::HAConfig::max_unacked_clients_

Maximum number of unacked clients.

Definition at line 831 of file ha_config.h.

Referenced by getMaxUnackedClients(), and setMaxUnackedClients().

◆ peers_

PeerConfigMap isc::ha::HAConfig::peers_

Map of peers' configurations.

Definition at line 843 of file ha_config.h.

Referenced by getAllServersConfig(), getOtherServersConfig(), getPeerConfig(), selectNextPeerConfig(), and validate().

◆ require_client_certs_

bool isc::ha::HAConfig::require_client_certs_

Require client certs flag.

Definition at line 841 of file ha_config.h.

Referenced by getRequireClientCerts(), and setRequireClientCerts().

◆ restrict_commands_

bool isc::ha::HAConfig::restrict_commands_

Restrict commands to HA flag.

Definition at line 842 of file ha_config.h.

Referenced by getRestrictCommands(), and setRestrictCommands().

◆ send_lease_updates_

bool isc::ha::HAConfig::send_lease_updates_

Send lease updates to partner?

Definition at line 821 of file ha_config.h.

Referenced by amSendingLeaseUpdates(), and setSendLeaseUpdates().

◆ state_machine_

StateMachineConfigPtr isc::ha::HAConfig::state_machine_

State machine configuration.

Definition at line 844 of file ha_config.h.

Referenced by getStateMachineConfig().

◆ sync_leases_

bool isc::ha::HAConfig::sync_leases_

Synchronize databases on startup?

Definition at line 822 of file ha_config.h.

Referenced by amSyncingLeases(), and setSyncLeases().

◆ sync_page_limit_

uint32_t isc::ha::HAConfig::sync_page_limit_

Page size limit while synchronizing leases.

Definition at line 824 of file ha_config.h.

Referenced by getSyncPageLimit(), and setSyncPageLimit().

◆ sync_timeout_

uint32_t isc::ha::HAConfig::sync_timeout_

Timeout for syncing lease database (ms)

Definition at line 823 of file ha_config.h.

Referenced by getSyncTimeout(), and setSyncTimeout().

◆ this_server_name_

std::string isc::ha::HAConfig::this_server_name_

This server name.

Definition at line 819 of file ha_config.h.

Referenced by getThisServerName(), and setThisServerName().

◆ trust_anchor_

util::Optional<std::string> isc::ha::HAConfig::trust_anchor_

Trust anchor.

Definition at line 838 of file ha_config.h.

Referenced by getTrustAnchor(), setTrustAnchor(), and validate().

◆ wait_backup_ack_

bool isc::ha::HAConfig::wait_backup_ack_

Wait for lease update ack from backup?

Definition at line 833 of file ha_config.h.

Referenced by amWaitingBackupAck(), setWaitBackupAck(), and validate().

The documentation for this class was generated from the following files:

Classes

Public Types

Public Member Functions

Static Public Member Functions

Public Attributes

Detailed Description

Member Typedef Documentation

◆ PeerConfigMap

◆ PeerConfigPtr

◆ StateConfigPtr

◆ StateMachineConfigPtr

Member Enumeration Documentation

◆ HAMode

Constructor & Destructor Documentation

◆ HAConfig()

Member Function Documentation

◆ amAllowingCommRecovery()

◆ amSendingLeaseUpdates()

◆ amSyncingLeases()

◆ amWaitingBackupAck()

◆ create()

◆ getAllServersConfig()

◆ getCertFile()

◆ getDelayedUpdatesLimit()

◆ getEnableMultiThreading()

◆ getFailoverPeerConfig()

◆ getHAMode()

◆ getHeartbeatDelay()

◆ getHttpClientThreads()

◆ getHttpDedicatedListener()

◆ getHttpListenerThreads()

◆ getKeyFile()

◆ getMaxAckDelay()

◆ getMaxRejectedLeaseUpdates()

◆ getMaxResponseDelay()

◆ getMaxUnackedClients()

◆ getOtherServersConfig()

◆ getPeerConfig()

◆ getRequireClientCerts()

◆ getRestrictCommands()

◆ getStateMachineConfig()

◆ getSubnetServerName()

◆ getSyncPageLimit()

◆ getSyncTimeout()

◆ getThisServerConfig()

◆ getThisServerName()

◆ getTrustAnchor()

◆ HAModeToString()

◆ selectNextPeerConfig()

◆ setCertFile()

◆ setDelayedUpdatesLimit()

◆ setEnableMultiThreading()

◆ setHAMode()

◆ setHeartbeatDelay()

◆ setHttpClientThreads()

◆ setHttpDedicatedListener()

◆ setHttpListenerThreads()

◆ setKeyFile()

◆ setMaxAckDelay()

◆ setMaxRejectedLeaseUpdates()

◆ setMaxResponseDelay()

◆ setMaxUnackedClients()

◆ setRequireClientCerts()

◆ setRestrictCommands()

◆ setSendLeaseUpdates()

◆ setSyncLeases()

◆ setSyncPageLimit()

◆ setSyncTimeout()

◆ setThisServerName()

◆ setTrustAnchor()

◆ setWaitBackupAck()

◆ stringToHAMode()

◆ validate()

Member Data Documentation

◆ cert_file_

◆ delayed_updates_limit_

◆ enable_multi_threading_

◆ ha_mode_

◆ heartbeat_delay_

◆ http_client_threads_