Basic model of an allocator: resources are allocated to a framework in the form of offers. More...

#include <allocator.hpp>

Inheritance diagram for mesos::allocator::Allocator:

Public Member Functions
	Allocator ()

virtual	~Allocator ()

virtual void	initialize (const Options &options, const lambda::function< void(const FrameworkID &, const hashmap< std::string, hashmap< SlaveID, Resources >> &)> &offerCallback, const lambda::function< void(const FrameworkID &, const hashmap< SlaveID, UnavailableResources > &)> &inverseOfferCallback)=0
	Initializes the allocator when the master starts up. More...

virtual void	recover (const int expectedAgentCount, const hashmap< std::string, Quota > &quotas)=0
	Informs the allocator of the recovered state from the master. More...

virtual void	addFramework (const FrameworkID &frameworkId, const FrameworkInfo &frameworkInfo, const hashmap< SlaveID, Resources > &used, bool active, FrameworkOptions &&options)=0
	Adds a framework to the Mesos cluster. More...

virtual void	removeFramework (const FrameworkID &frameworkId)=0
	Removes a framework from the Mesos cluster. More...

virtual void	activateFramework (const FrameworkID &frameworkId)=0
	Activates a framework in the Mesos cluster. More...

virtual void	deactivateFramework (const FrameworkID &frameworkId)=0
	Deactivates a framework in the Mesos cluster. More...

virtual void	updateFramework (const FrameworkID &frameworkId, const FrameworkInfo &frameworkInfo, FrameworkOptions &&options)=0
	Updates FrameworkInfo and FrameworkOptions. More...

virtual void	addSlave (const SlaveID &slaveId, const SlaveInfo &slaveInfo, const std::vector< SlaveInfo::Capability > &capabilities, const Option< Unavailability > &unavailability, const Resources &total, const hashmap< FrameworkID, Resources > &used)=0
	Adds or re-adds an agent to the Mesos cluster. More...

virtual void	removeSlave (const SlaveID &slaveId)=0
	Removes an agent from the Mesos cluster. More...

virtual void	updateSlave (const SlaveID &slave, const SlaveInfo &slaveInfo, const Option< Resources > &total=None(), const Option< std::vector< SlaveInfo::Capability >> &capabilities=None())=0
	Updates an agent. More...

virtual void	addResourceProvider (const SlaveID &slave, const Resources &total, const hashmap< FrameworkID, Resources > &used)=0
	Add resources from a local resource provider to an agent. More...

virtual void	activateSlave (const SlaveID &slaveId)=0
	Activates an agent. More...

virtual void	deactivateSlave (const SlaveID &slaveId)=0
	Deactivates an agent. More...

virtual void	updateWhitelist (const Option< hashset< std::string >> &whitelist)=0
	Updates the list of trusted agents. More...

virtual void	requestResources (const FrameworkID &frameworkId, const std::vector< Request > &requests)=0
	Requests resources for a framework. More...

virtual void	updateAllocation (const FrameworkID &frameworkId, const SlaveID &slaveId, const Resources &offeredResources, const std::vector< ResourceConversion > &conversions)=0
	Updates allocation by applying offer operations. More...

virtual process::Future< Nothing >	updateAvailable (const SlaveID &slaveId, const std::vector< Offer::Operation > &operations)=0
	Updates available resources on an agent based on a sequence of offer operations. More...

virtual void	updateUnavailability (const SlaveID &slaveId, const Option< Unavailability > &unavailability)=0
	Updates unavailability for an agent. More...

virtual void	updateInverseOffer (const SlaveID &slaveId, const FrameworkID &frameworkId, const Option< UnavailableResources > &unavailableResources, const Option< InverseOfferStatus > &status, const Option< Filters > &filters=None())=0
	Updates inverse offer. More...

virtual process::Future< hashmap< SlaveID, hashmap< FrameworkID, mesos::allocator::InverseOfferStatus > > >	getInverseOfferStatuses ()=0
	Retrieves the status of all inverse offers maintained by the allocator. More...

virtual void	transitionOfferedToAllocated (const SlaveID &slaveId, const Resources &resources)=0
	This method should be invoked when the offered resources has become actually allocated. More...

virtual void	recoverResources (const FrameworkID &frameworkId, const SlaveID &slaveId, const Resources &resources, const Option< Filters > &filters, bool isAllocated)=0
	Recovers resources. More...

virtual void	suppressOffers (const FrameworkID &frameworkId, const std::set< std::string > &roles)=0
	Suppresses offers. More...

virtual void	reviveOffers (const FrameworkID &frameworkId, const std::set< std::string > &roles)=0
	Revives offers to this framework for the specified roles. More...

virtual void	updateQuota (const std::string &role, const Quota &quota)=0
	Informs the allocator to update quota for the given role. More...

virtual void	updateWeights (const std::vector< WeightInfo > &weightInfos)=0
	Updates the weight associated with one or more roles. More...

virtual void	pause ()=0
	Idempotent helper to pause allocations. More...

virtual void	resume ()=0
	Idempotent helper to resume allocations. More...

Static Public Member Functions
static Try< Allocator * >	create (const std::string &name, const std::string &roleSorter, const std::string &frameworkSorter)
	Attempts either to create a built-in DRF allocator or to load an allocator instance from a module using the given name. More...

Detailed Description

Basic model of an allocator: resources are allocated to a framework in the form of offers.

A framework can refuse some resources in offers and run tasks in others. Allocated resources can have offer operations applied to them in order for frameworks to alter the resource metadata (e.g. creating persistent volumes). Resources can be recovered from a framework when tasks finish/fail (or are lost due to an agent failure) or when an offer is rescinded.

This is the public API for resource allocators.

Constructor & Destructor Documentation

mesos::allocator::Allocator::Allocator ( )

inline

virtual mesos::allocator::Allocator::~Allocator ( )

inlinevirtual

Member Function Documentation

virtual void mesos::allocator::Allocator::activateFramework ( const FrameworkID & frameworkId )

pure virtual

Activates a framework in the Mesos cluster.

Offers are only sent to active frameworks.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::activateSlave ( const SlaveID & slaveId )

pure virtual

Activates an agent.

This is invoked when an agent reregisters. Offers are only sent for activated agents.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::addFramework	(	const FrameworkID &	frameworkId,
		const FrameworkInfo &	frameworkInfo,
		const hashmap< SlaveID, Resources > &	used,
		bool	active,
		FrameworkOptions &&	options
	)

pure virtual

Adds a framework to the Mesos cluster.

The allocator is invoked when a new framework joins the Mesos cluster and is entitled to participate in resource sharing.

Parameters

used	Resources used by this framework. The allocator should account for these resources when updating the allocation of this framework. The allocator should avoid double accounting when yet unknown agents are added later in `addSlave()`.
active	Whether the framework is initially activated.
options	Initial FrameworkOptions of this framework.

virtual void mesos::allocator::Allocator::addResourceProvider	(	const SlaveID &	slave,
		const Resources &	total,
		const hashmap< FrameworkID, Resources > &	used
	)

pure virtual

Add resources from a local resource provider to an agent.

Parameters

slave	Id of the agent to modify.
total	The resources to add to the agent's total resources.
used	The resources to add to the resources tracked as used for this agent.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::addSlave	(	const SlaveID &	slaveId,
		const SlaveInfo &	slaveInfo,
		const std::vector< SlaveInfo::Capability > &	capabilities,
		const Option< Unavailability > &	unavailability,
		const Resources &	total,
		const hashmap< FrameworkID, Resources > &	used
	)

pure virtual

Adds or re-adds an agent to the Mesos cluster.

It is invoked when a new agent joins the cluster or in case of agent recovery.

Parameters

slaveId	ID of the agent to be added or re-added.
slaveInfo	Detailed info of the agent. The slaveInfo resources correspond directly to the static –resources flag value on the agent.
capabilities	Capabilities of the agent.
total	The `total` resources are passed explicitly because it includes resources that are dynamically "checkpointed" on the agent (e.g. persistent volumes, dynamic reservations, etc).
used	Resources that are allocated on the current agent. The allocator should avoid double accounting when yet unknown frameworks are added later in `addFramework()`.

TODO(asekretenko): Ideally, to get rig of an intermediate allocator state when some resources are used by nonexistent frameworks, we should change the interface so that per-agent per-framework used resources and the not yet known frameworks that are using them are added atomically.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

static Try<Allocator*> mesos::allocator::Allocator::create	(	const std::string &	name,
		const std::string &	roleSorter,
		const std::string &	frameworkSorter
	)

static

Attempts either to create a built-in DRF allocator or to load an allocator instance from a module using the given name.

If Try does not report an error, the wrapped Allocator* is not null.

TODO(bmahler): Figure out how to pass parameters without burning in the built-in module arguments.

Parameters

name	Name of the allocator.

virtual void mesos::allocator::Allocator::deactivateFramework ( const FrameworkID & frameworkId )

pure virtual

Deactivates a framework in the Mesos cluster.

Resource offers are not sent to deactivated frameworks.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::deactivateSlave ( const SlaveID & slaveId )

pure virtual

Deactivates an agent.

This is triggered if an agent disconnects from the master. The allocator should treat all offers from the deactivated agent as rescinded. (There is no separate call to the allocator to handle this). Resources aren't "recovered" when an agent deactivates because the resources are lost.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual process::Future< hashmap<SlaveID, hashmap<FrameworkID, mesos::allocator::InverseOfferStatus> > > mesos::allocator::Allocator::getInverseOfferStatuses ( )

pure virtual

Retrieves the status of all inverse offers maintained by the allocator.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::initialize ( const Options & options )

pure virtual

Initializes the allocator when the master starts up.

Any errors in initialization should fail fast and result in an ABORT. The master expects the allocator to be successfully initialized if this call returns.

Parameters

allocationInterval	The allocate interval for the allocator, it determines how often the allocator should perform the batch allocation. An allocator may also perform allocation based on events (a framework is added and so on), this depends on the implementation.
offerCallback	A callback the allocator uses to send allocations to the frameworks.
inverseOfferCallback	A callback the allocator uses to send reclaim allocations from the frameworks.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::pause ( )

pure virtual

Idempotent helper to pause allocations.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::recover	(	const int	expectedAgentCount,
		const hashmap< std::string, Quota > &	quotas
	)

pure virtual

Informs the allocator of the recovered state from the master.

Because it is hard to define recovery for a running allocator, this method should be called after initialize(), but before actual allocation starts (i.e. addSlave() is called).

TODO(alexr): Consider extending the signature with expected frameworks count once it is available upon the master failover.

Parameters

quotas A (possibly empty) collection of quotas, keyed by their role, known to the master.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::recoverResources	(	const FrameworkID &	frameworkId,
		const SlaveID &	slaveId,
		const Resources &	resources,
		const Option< Filters > &	filters,
		bool	isAllocated
	)

pure virtual

Recovers resources.

Used to update the set of available resources for a specific agent. This method is invoked to inform the allocator about offered resources that have been refused or allocated (i.e. used for launching tasks) resources that are no longer in use. The resources will have an allocation_info.role assigned and callers are expected to only call this with resources allocated to a single role.

TODO(bmahler): We could allow resources allocated to multiple roles within a single call here, but filtering them in the same way does not seem desirable.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::removeFramework ( const FrameworkID & frameworkId )

pure virtual

Removes a framework from the Mesos cluster.

It is up to an allocator to decide what to do with framework's resources. For example, they may be released and added back to the shared pool of resources.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::removeSlave ( const SlaveID & slaveId )

pure virtual

Removes an agent from the Mesos cluster.

All resources belonging to this agent should be released by the allocator.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::requestResources	(	const FrameworkID &	frameworkId,
		const std::vector< Request > &	requests
	)

pure virtual

Requests resources for a framework.

A framework may request resources via this call. It is up to the allocator how to react to this request. For example, a request may be ignored, or may influence internal priorities the allocator may keep for frameworks.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::resume ( )

pure virtual

Idempotent helper to resume allocations.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::reviveOffers	(	const FrameworkID &	frameworkId,
		const std::set< std::string > &	roles
	)

pure virtual

Revives offers to this framework for the specified roles.

This is invoked by a framework when it wishes to receive filtered resources immediately or get itself out of a suppressed state. If roles is an empty set, it is treated as being set to all of the framework's subscribed roles.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::suppressOffers	(	const FrameworkID &	frameworkId,
		const std::set< std::string > &	roles
	)

pure virtual

Suppresses offers.

Informs the allocator to stop sending offers to this framework for the specified roles. If roles is an empty set, we will stop sending offers to this framework for all of the framework's subscribed roles.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::transitionOfferedToAllocated	(	const SlaveID &	slaveId,
		const Resources &	resources
	)

pure virtual

This method should be invoked when the offered resources has become actually allocated.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::updateAllocation	(	const FrameworkID &	frameworkId,
		const SlaveID &	slaveId,
		const Resources &	offeredResources,
		const std::vector< ResourceConversion > &	conversions
	)

pure virtual

Updates allocation by applying offer operations.

This call is mainly intended to support persistence-related features (dynamic reservation and persistent volumes). The allocator may react differently for certain offer operations. The allocator should use this call to update bookkeeping information related to the framework. The offeredResources are the resources that the operations are applied to and must be allocated to a single role.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual process::Future<Nothing> mesos::allocator::Allocator::updateAvailable	(	const SlaveID &	slaveId,
		const std::vector< Offer::Operation > &	operations
	)

pure virtual

Updates available resources on an agent based on a sequence of offer operations.

Operations may include reserve, unreserve, create or destroy.

Parameters

slaveId	ID of the agent.
operations	The offer operations to apply to this agent's resources.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::updateFramework	(	const FrameworkID &	frameworkId,
		const FrameworkInfo &	frameworkInfo,
		FrameworkOptions &&	options
	)

pure virtual

Updates FrameworkInfo and FrameworkOptions.

NOTE: Effective framework options can also be changed via other methods. For example, suppress() and revive() change the suppression state of framework's roles.

virtual void mesos::allocator::Allocator::updateInverseOffer	(	const SlaveID &	slaveId,
		const FrameworkID &	frameworkId,
		const Option< UnavailableResources > &	unavailableResources,
		const Option< InverseOfferStatus > &	status,
		const Option< Filters > &	filters = `None()`
	)

pure virtual

Updates inverse offer.

Informs the allocator that the inverse offer has been responded to or revoked.

Parameters

unavailableResources	The `unavailableResources` can be used by the allocator to distinguish between different inverse offers sent to the same framework for the same slave.
status	If `status` is not set then the inverse offer was not responded to, possibly because the offer timed out or was rescinded. This might require the implementation of the function to remove any inverse offers that are outstanding.
filters	A filter attached to the inverse offer can be used by the framework to control when it wants to be contacted again with the inverse offer. The "filters" for InverseOffers are identical to the existing mechanism for re-offering Offers to frameworks.

virtual void mesos::allocator::Allocator::updateQuota	(	const std::string &	role,
		const Quota &	quota
	)

pure virtual

Informs the allocator to update quota for the given role.

It is up to the allocator implementation how to satisfy quota. An implementation may employ different strategies for roles with or without quota. All roles have a default quota defined as DEFAULT_QUOTA. Currently, it is no guarantees and no limits. Thus to "remove" a quota, one should simply update the quota to be DEFAULT_QUOTA.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::updateSlave	(	const SlaveID &	slave,
		const SlaveInfo &	slaveInfo,
		const Option< Resources > &	total = `None()`,
		const Option< std::vector< SlaveInfo::Capability >> &	capabilities = `None()`
	)

pure virtual

Updates an agent.

TODO(bevers): Make total and capabilities non-optional.

Parameters

slaveInfo	The current slave info of the agent.
total	The new total resources on the agent.
capabilities	The new capabilities of the agent.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::updateUnavailability	(	const SlaveID &	slaveId,
		const Option< Unavailability > &	unavailability
	)

pure virtual

Updates unavailability for an agent.

We currently support storing the next unavailability, if there is one, per agent. If unavailability is not set then there is no known upcoming unavailability. This might require the implementation of the function to remove any inverse offers that are outstanding.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::updateWeights ( const std::vector< WeightInfo > & weightInfos )

pure virtual

Updates the weight associated with one or more roles.

If a role was previously configured to have a weight and that role is omitted from this list, it keeps its old weight.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

virtual void mesos::allocator::Allocator::updateWhitelist ( const Option< hashset< std::string >> & whitelist )

pure virtual

Updates the list of trusted agents.

This is invoked when the master starts up with the –whitelist flag.

Parameters

whitelist A set of agents that are allowed to contribute their resources to the resource pool.

Implemented in mesos::internal::master::allocator::MesosAllocator< AllocatorProcess >.

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

include/mesos/allocator/allocator.hpp

Public Member Functions

Static Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation